id stringlengths 8 8 | question stringlengths 6 10.2k | choices listlengths 4 4 | answer stringclasses 4
values | rationale stringlengths 0 2.59k | difficulty stringclasses 1
value | source stringclasses 146
values |
|---|---|---|---|---|---|---|
981ba8cd | With respect to the importance of hydrogen bonding and DNA double helix stability, which of the following statements is false? | [
"Favorable tautomeric form of nucleotide bases",
"Contributes to the thermodynamic stability",
"Decreases the entropy",
"Specificity of base pairing"
] | A | It is easy to break the bond between A and T than in between G and C. This is because A and T has a double bond whereas G and C has triple bond connecting them. Thus, the energy required to break a double bond is lower compared to a triple bond. | molecular_biology | |
f3d20736 | The frictional resistance for fluids in motion varies | [
"slightly with temperature for both laminar and turbulent flows",
"considerably with temperature for both laminar and turbulent flows",
"slightly with temperature for laminar flow and considerably with temperature for turbulent flow",
"considerably with temperature for laminar flow and slightly with temperatu... | D | According to the laws of fluid friction, the frictional resistance for fluids in motion varies considerably with temperature for laminar flow and slightly with temperature for turbulent flow. | fluid_mechanics | |
f47d84c1 | Naina receives emails that consists of 18% spam of those emails. The spam filter is 93% reliable i.e., 93% of the mails it marks as spam are actually a spam and 93% of spam mails are correctly labelled as spam. If a mail marked spam by her spam filter, determine the probability that it is really spam. | [
"50%",
"84%",
"39%",
"63%"
] | A | 18% email are spam and 82% email are not spam. Now, 18% of mail marked as spam is spam and 82% mail marked as spam are not spam. By Bayes theorem the probability that a mail marked spam is really a spam = (Probability of being spam and being detected as spam)/(Probability of being detected as spam) = (0.18 * 0.82)/(0.... | discrete_mathematics | |
f85703db | How many gms of NaOH is there in 0.002 lb mole NaOH? | [
"32.36",
"36.32",
"24.28",
"28.24"
] | B | Relative molecular mass = Molecular mass of C + 2(Molecular mass of Oxygen). | chemical_process_calculation | |
cb8fe906 | Which of the following is the commercial method of preparation of benzaldehyde? | [
"Oxidation of toluene",
"Oxidation of benzyl chloride",
"Oxidation of benzyl alcohol",
"Etard reaction"
] | C | This involves the treatment of benzyl alcohol with dil. HNO3 or acidic potassium dichromate or chromic anhydride in acetic anhydride or with copper catalyst at 350o C. This process is used for commercial production of benzaldehyde. | organic_chemistry | |
a2179ee4 | A composite wall generally consists of | [
"One homogenous layer",
"Multiple heterogeneous layers",
"One heterogeneous layer",
"Multiple homogenous layers"
] | B | Walls of houses where bricks are given a layer of plaster on either side. | heat_transfer | |
5ec2ff3d | If the rate of a reaction is given as (-rA) = \(\frac{k_1+C_A^2}{k_2×C_A} \frac{mol}{m^3 min} \), then the units of k1 and k2 respectively are ____ | [
"\\(\\frac{mol^2}{m^6} \\) and min",
"min and \\(\\frac{mol^2}{m^6} \\)",
"mol and min",
"m3 and mol"
] | A | Two quantities of the same dimensions can only be added. As the unit of concentration is \(\frac{mol^2}{m^3} \) , k1 has the units \(\frac{mol^2}{m^6} \).
Equating the units of all known quantities on both sides, \(\frac{mol}{m^3 min} = \frac{mol^2}{m^6} × \frac{1}{k_2×(\frac{mol}{m^3})}. \)
Hence, k2 has the unit of m... | chemical_reaction_engineering | |
90e7e1c8 | CMS stands for | [
"cipher message syntax",
"certificate message session",
"cryptographic message syntax",
"none of the mentioned"
] | D | CMP stands for certificate management protocol. | cryptograph_&_network_security | |
d310e5f3 | 5. Choose the condition from below that is not a part of Dirichlet’s conditions? | [
"If it is continuous then there are a finite number of discontinuities in the period T1",
"It has a finite average value over the period T",
"It has a finite number of positive and negative maxima in the period T",
"It is a periodic signal"
] | A | When the Dirichlet’s conditions are satisfied, then only for a signal, the fourier series exist. Fourier series is of two types- trigonometric series and exponential series. | signals_and_systems | |
f7c942de | Which of the following methods uses the concept that exponentiation is computationally inexpensive in the finite field? | [
"Diffie-HEllman key exchange",
"RSA key exchange",
"Arithmetic key exchange",
"FSM method"
] | A | Exponentiation in the finite fields has its many applications in the public key cryptography system. Now, the Diffie–Hellman key exchange can have the concept that exponentiation is computationally inexpensive in the finite fields and the discrete logarithm which is the inverse of exponentiation, can be computationally... | discrete_mathematics | |
1754097c | e-transitions are | [
"conditional",
"unconditional",
"input dependent",
"none of the mentioned"
] | A | Due to the presence of ε symbol, or rather an epsilon-move, the input alphabets unites with it to form a set including ε. | automata_theory | |
168b2b63 | With an accumulation of waste formed during the reaction, the value of observed Monod rate constant ____ | [
"Decreases",
"Increases",
"Remains constant",
"First decreases and then increases"
] | A | The accumulation of waste formed decelerates the reaction rate. This decrease is reflected in the reaction rate constant. | chemical_reaction_engineering | |
85ac8bf7 | Which of the following cloud storage is mainly meant for developers and to support applications built using Web services? | [
"Managed",
"Unmanaged",
"Disk",
"All of the mentioned"
] | A | Managed cloud storage is provisioned and provided as a raw disk. | cloud_computing | |
f98cc1ef | Which of the following isn’t a strengthening mechanism for multi-phase materials? | [
"Precipitation strengthening",
"Dispersion strengthening",
"Solid solution strengthening",
"Martensite strengthening"
] | C | Precipitation strengthening, dispersion strengthening, martensite strengthening are strengthening mechanism used for multi-phase materials. Solid solution strengthening is used for single-phase materials. | materials_science | |
a9255d70 | 1. How many times will the following loop be executed?<div class="hk1_style-wrap4"><div class="hk1_style-wrap3"><div class="hk1_style-wrap2"><div class="hk1_style-wrap"><div class="hk1_style"><div class="c"><pre class="de1"> ch <span class="sy0">=</span> <span class="st0">'b'</span><span class="sy0">;</span> <span clas... | [
"0",
"25",
"26",
"1"
] | B | Because there are 26 alphabets and so it runs for 26-1 times. | compiler | |
bb69842d | If no header is specified, the block is said to be an _______________ PL/SQL block. | [
"Strong",
"Weak",
"Empty",
"Anonymous"
] | D | The terms literal and constant value are synonymous and refer to a fixed data value. | database_management | |
e51427b3 | Fork returns _____ to parent process on success | [
"0",
"child process id",
"parent process id",
"none"
] | B | None. | linux | |
9df00ded | The tributary area lines between two columns/beams are at how much distance from one of the beam? | [
"0.2 of the total in between length",
"0.4 of the total in between length",
"0.5 of the total in between length",
"Depends on the amount of load carried"
] | B | The tributary area is the loaded area of a particular structure directly contributing to the load applied. | structural_analysis | |
004c8c54 | What is the solution to the absence of a script tag without an src attribute? | [
"Resend the scripts",
"Create inline JavaScript",
"Attach a javascript file",
"Include a file"
] | B | The solution to the absence of a script tag without an src attribute is to create inline JavaScript to append script tags to the document dynamically, for example:
<script>
var script = window.document.createElement('SCRIPT');
script.src = src;
window.document.getElementsByTagName('HEAD')[0].appendChild(... | javascript | |
05c4748b | In Alkylation, addition of which radical takes place? | [
"Hydrogen",
"Halogen",
"Alkyl",
"Aromatic"
] | C | Alkylation may be defined as the introduction of an alkyl radical by substitution or addition into an organic compound. | unit_processes | |
9967421f | Which of the following register can be addressed as a byte? | [
"P1",
"SCON",
"TMOD",
"TCON"
] | C | The registers, TMOD, SP, TH0, TH1, TL0, TL1 are to be addressed as bytes. | microprocessor | |
ac16e797 | The state amplifier has no input is not called ______________ | [
"Zero signal condition",
"Non-signal condition",
"Quiescent condition",
"Empty-signal condition"
] | D | The state at which amplifier has zero input signal is called zero signal condition, Non-signal condition, quiescent condition. There is nothing named empty-signal condition. | analog_circuits | |
f5d9b08f | What is the return type of function id? | [
"int",
"float",
"bool",
"dict"
] | A | Execute help(id) to find out details in python shell.id returns a integer value that is unique. | python | |
81658c20 | What will be the value of MAB? | [
"-2EI Δ/L2",
"-4EI Δ/L2",
"-6EI Δ/L2",
"0"
] | C | Use conjugate beam and equate MBA to Δ. | structural_analysis | |
bf231c3b | How is throwaway prototype different from evolutionary prototype ? | [
"It involves successive steps",
"It involves just one task",
"The prototype is built with the idea that it will eventually be converted into final system",
"It has a shorter development time"
] | B | Except option b all other options represent the characteristics of an evolutionary prototype. | software_engineering | |
db0daf21 | In ________ the optical channel bandwidth is divided into non-overlapping frequency bands. | [
"Time division multiplexing",
"Frequency division multiplexing",
"Code division multiplexing",
"De-multiplexing"
] | B | In FDM, the non-overlapping frequency bands are divided to the individual frequencies. These individual signals can be extracted from the combined FDM signal by electrical filtering at the receiver terminal. | optical_communication | |
15690398 | According to material, drill can be classified as_____ | [
"hss",
"carbides",
"bot hss and carbides",
"none of the mentioned"
] | C | Both hss and carbides are classified according to material. In carbides, generally cemented carbide is mostly used. | machine_tools | |
1ee31a70 | The thermal efficiency of the cycle is | [
"Q2 / Wnet",
"Wnet / Q2",
"Wnet / Q1",
"Q1 / Wnet"
] | C | These work and heat quantities are the measured values for actual cycle. | thermodynamics | |
509e8697 | What if the moment of the force calculated about the axis of rolling is negative? | [
"It means that the force is applied in the opposite direction as imagined",
"It means that the direction of the motion is in the opposite sense as imagined",
"It means that the radius vector is in the opposite sense as imagined",
"Such calculation means that the calculations are wrongly done"
] | A | As we know the α, β and γ are the angles made by the x, y and z-axis respectively. Thus, is the magnitude of the vector is F, the F= Fcos β + Fcos α + Fcosγ. Which means the force is the resultant of all its axis’ components. The force driving the rolling motion of the body can be divided like this. | engineering_mechanics | |
68aa9285 | Which of the following is an independent variable in a linear analysis of a common base transistor? | [
"Collector emitter voltage",
"Collector current",
"Emitter base voltage",
"Emitter current"
] | D | In a linear analysis of a common base transistor, we have two independent variables. The emitter current is an independent variable and the emitter base voltage is the dependent variable. We can obtain VEB using IE from the characteristic curve. | electronic_devices_&_circuits | |
fa4649e8 | SGML stands for? | [
"Standard Granted Markup Language",
"System Generalized Markup Language",
"Standard Generalized Markup Language",
"System Granted Markup Language"
] | C | Web Browsers help the user to maintain a personal favorite list of URLs. Also, allows the user to download information on various formats. | computer_fundamentals | |
6c374fc8 | Which of the following is used as an ion-exchanger resin? | [
"ethanol",
"cellulose",
"starch",
"collagen"
] | B | When the pH (potential hydrogen) of a protein is lowered, the negatively charged groups become neutralized whereas the positively-charged groups become abundant. The opposite occurs when the pH increases. | cell_biology | |
b682320f | A thin sheet of refractive index 1.5 and thickness 1 cm is placed in the path of light. What is the path difference observed? | [
"0.003 m",
"0.004 m",
"0.005 m",
"0.006 m"
] | D | The shape of the interference pattern observed depends on the shape of the slits. If the shape of the slits changes, the shape of the fringes changes. | engineering_physics_ii | |
6d145870 | Which of the following does not occur during binary fission in bacteria? | [
"Cell elongation",
"Cytokinesis",
"DNA duplication",
"Spindle formation"
] | C | In some mutants of E.coli and B.subtilis, septum forms near the pole resulting in a very small daughter cell termed as minicell which lacks DNA and therefore cannot multiply. | microbiology | |
9b6f1928 | Which of the following expressions is in the sum-of-products form? | [
"(A + B)(C + D)",
"(A * B)(C * D)",
"A* B *(CD)",
"A * B + C * D"
] | D | Sum of product means that it is the sum of all product terms. Thus, the number is multiplied first and then it is added: A * B + C * D. | digital_circuits | |
03c4c986 | The unit for rate of reaction for a homogeneous reaction is __________ | [
"mol/s. g catalyst",
"mol/s. mmHg",
"mol/s. m3",
"mol/s. m2"
] | A | From design eqn \(\frac{dFi}{dV}\) = ri. The reaction rate doesn’t depend on shape of the reactor. | chemical_reaction_engineering | |
44060f69 | The directional derivative of φ(x,y) at the point A(3,2) towards the point B(2,3). What is \(3\sqrt{2}\) and toward the point (1,0) is \(\sqrt{8}\). What is the directional derivative at the point A towards the point D. | [
"\\(\\frac{6}{5}\\)",
"\\(\\frac{7}{\\sqrt{5}} \\)",
"\\(\\frac{6}{\\sqrt{5}} \\)",
"\\(\\frac{7}{5} \\)"
] | B | Here \(\overrightarrow{AB} = (2-3) i ̂ + (3-2) j ̂ = – i ̂ + j ̂ \)
Directional derivative of φ(x,y) toward \(\overrightarrow{AB} \) is
\(∇ φ . \widehat{(AB)} = (\hat{i} \frac{∂φ}{∂x}+ \hat{j}\frac{∂φ}{∂y}) .(\frac{- i ̂ + j ̂ }{\sqrt{2}}) = 3\sqrt{2}\)
\(– \frac{∂φ}{∂x} + \frac{∂φ}{∂y} = 6 …..(i) \)
Direct... | engineering_mathematics | |
976884b6 | Which of the following is used to provide privilege to only a particular attribute? | [
"Grant select on employee to Amit",
"Grant update(budget) on department to Raj",
"Grant update(budget,salary,Rate) on department to Raj",
"Grant delete to Amit"
] | B | This grant statement gives user Raj update authorization on the budget attribute of the department relation. | database_management | |
c201e121 | One way to make a four-bit adder to perform subtraction is by ___________ | [
"Inverting the output",
"Inverting the carry-in",
"Inverting the B inputs",
"Grounding the B inputs"
] | C | A adder is a digital circuit which adds bits along with a carry bit from a previous stage, thus producing 2 outputs SUM and CARRY. Since, a four bit adder has four A, four B and a carry at the input end. So, for subtraction to be performed, all the Bs terminal should be inverted. | digital_circuits | |
55d54d88 | What is angiogenesis? | [
"Differentiation process",
"Growth factors",
"Contact inhibition",
"Blood vessel formation"
] | C | Cancer cell loses contact inhibition, anchorage dependence, does not undergo apoptosis, become immortal, invasive and invade normal tissue in the body. | life_sciences | |
1b28a54b | 4. Predict the output of the program.<div class="hk1_style-wrap4"><div class="hk1_style-wrap3"><div class="hk1_style-wrap2"><div class="hk1_style-wrap"><div class="hk1_style"><div class="cpp"><pre class="de1"><span class="kw2">class</span> A <span class="br0">{</span> <span class="kw2">public</span> <span class="kw4">i... | [
"10",
"20",
"21",
"0"
] | B | The expected output may be 10 because the value of member of object x is printed. But when object x is assigned to y, y points to the same address where x is stored. So actually both objects x and y point to the same location and refers to the same object. | object_oriented_programming | |
a7ff3a98 | If a resistor Rx is connected between nodes X and Y, Ry between X and Y, Rz between Y and Z to form a delta connection, then after transformation to star, the resistance at node Y is? | [
"RzRy/(Rx+Ry+Rz)",
"RzRx/(Rx+Ry+Rz)",
"RxRy/(Rx+Ry+Rz)",
"(Rz+Ry)/(Rx+Ry+Rz)"
] | B | After transformation to star, the resistor at node Y is RzRx/(Rx+Ry+Rz) and this resistance lies between Rx, Rz in star connection. | network_theory | |
6570019d | How can the values in the relation teaches be deleted? | [
"Drop table teaches;",
"Delete from teaches;",
"Purge table teaches;",
"Delete from teaches where Id =’Null’;"
] | B | Delete table cleans the entry from the table. | database_management | |
32952953 | For the solid state syntheses of ferrite spinels, it is ______________ for the precursor methods to yield phases of accurate stoichiometry | [
"Important",
"Not necessary",
"Controllable",
"Meaningless"
] | A | It is important for the precursor methods to yield the phases of accurate stoichiometry by careful control of the experimental conditions since several chromites and ferrites are valuable magnetic materials whose properties may be sensitive to purity and stoichiometry. | solid_state_chemistry | |
8842cf6f | Which of the following can be used to impute data sets based only on information in the training set? | [
"postProcess",
"preProcess",
"process",
"all of the mentioned"
] | B | This can be done with K-nearest neighbors. | data_science | |
77b49863 | Alternate straight chain polymers are ___________ | [
"Soft and flexible",
"Hard and flexible",
"Soft and brittle",
"Hard and brittle"
] | A | Alternate straight chain polymers are soft and brittle nature. All the straight chain polymers are soft and brittle. | applied_chemistry | |
4506851b | Which of the following is correct? | [
"We cannot represent the moment caused by the force along any axis in vector form",
"We can represent the moment caused by the force along any axis in the scalar form",
"We cannot represent the moment caused by the force along any point in vector form",
"We can represent the moment caused by the force along a... | D | The r in the equation A.(rxF) is the radius vector. That is it is the vector which is having the start point at the axis and the endpoint at the point of action of the force on the body. This vector is being crossed by the force vector, which is then followed by the dot product with the axis vector. | engineering_mechanics | |
127b7d33 | In cab cable, the curved portion of the tendon and anchors lie in ___________ | [
"Compression and Tension zone",
"Cracking zone",
"Tension and Compression zone",
"Loading zone"
] | C | A short curved tendon arranged at the interior support of a continuous beam where the anchors are in compression zone and the curved portion is in the tensile zone is called as a cab cable and it is small in size and consists of anchorages and its sides. | prestressed_concrete_structures | |
11785d02 | Which of the following are considered as components configurations for air vehicle? | [
"Timeline Synchronizer",
"Periodic Sequencer",
"Event Handler",
"All of the mentioned"
] | D | All of the mentioned are considered as components configurations for air vehicles. | software_architecture | |
4dceeb97 | The _____________ command is used on Linux for getting the DNS and host-related information. | [
"dnslookup",
"lookup",
"nslookup",
"infolookup"
] | B | A ping sweep is a network scanning practice through which hackers can use to conclude to a point which IP address from a list of IP addresses is mapping to live hosts. | cyber_security | |
6d55c23f | The filed density of a natural soil deposit cannot be determined by_____ method. | [
"sand replacement",
"oven-dry",
"core cutter",
"water displacement"
] | B | The methods for determining field density are:
sand replacement method
core cutter method
water displacement method
rubber balloon method
The oven-dry method is used for the determination of water content. | geotechnical_engineering_i | |
5e45d865 | Being inextensible the cable has ___________ length. | [
"Infinite",
"Zero",
"Average to zero",
"Constant"
] | C | Due to the flexibility property the cable, it offers no resistance to bending. As the bending is seen in the beams and all the solid structures. Thus the bending moment produced in the cables are not affecting the cables much. Thus no affect by bending, i.e. no resistance to bending. | engineering_mechanics | |
45c63814 | The decoded instruction is stored in ______ | [
"IR",
"PC",
"Registers",
"MDR"
] | A | The instruction after obtained from the PC, is decoded and operands are fetched and stored in the IR. | computer_architecture | |
da3c0f2e | The temperature of sink of Carnot’s engine is 27°C. If the efficiency of the engine is 25%, then the temperature of source must be ___________ | [
"27°C",
"127°C",
"227°C",
"327°C"
] | A | Ƞ=1-T2/T1
Ƞ=1-(273-123)/(273+27)=1-150/300=1/2=50%. | engineering_physics_i | |
cc9859d2 | Ribosomes contain three functionally distinct tRNA binding sites. Which of the following is not one of them? | [
"A site",
"P site",
"E site",
"O site"
] | D | The distribution of proteins in the two ribosomal subunits is not uniform. Most of the proteins are concentrated on the sides opposite to where the two subunits interact with each other. The part of the ribosome which interacts with mRNA mostly consists of rRNAs. | protein_engineering | |
6ee33ac8 | What is the chemical formula of super phosphate? | [
"CaH4 (PO4)2",
"Ca3 (PO4)2",
"CaH4 (PO4)2∙CaSO4",
"(Ca3 (PO4)2)3∙CaF2"
] | C | Chemical formula of super phosphate formed by reaction of phosphate rock with sulfuric acid containing 16-20% P2O5 is CaH4 (PO4)2∙CaSO4. | chemical_technology | |
751b281a | A bar having two sections of cross sectional area of 100mm2 and 200mm2 respectively. The length of both the sections is 200mm. What will be the total strain in the bar if it is subjected to axial force of 100kN and E = 105 N/mm2? | [
"0.010",
"0.015",
"0.020",
"0.030"
] | B | Strain in section 1 = P/AE = 100,000 / 100×100000 = 0.010
Strain is section 2 = P / AE = 100,000 / 200×100000 = 0.005
Resultant strain in the bar = 0.010 + 0.005 = 0.015mm. | strength_of_materials | |
9f0fd671 | Usually, a capacitor is inserted between an analog input and the ground because | [
"it blocks the analog voltage",
"it suppresses the noise",
"it increases the gain",
"none of the mentioned"
] | B | A capacitor is inserted between the analog input and the ground because it suppresses the noise. | microcontroller | |
80c0f631 | ____ is conserved but ____ is not conserved. | [
"exergy, energy",
"energy, exergy",
"both exergy and energy are conserved",
"neither exergy nor energy is conserved"
] | B | Energy is conserved but once the exergy is wasted, it can never be recovered. | thermodynamics | |
ea2dd414 | What is the order of core energy? | [
"0.5 – 1.5 eV",
"0.1 – 1.0 eV",
"2.0 – 4.0 eV",
"3.0 – 10 eV"
] | A | Core energy contributes 10% to the total energy due to dislocation. It is of the order of 0.5 to 1.5 eV. In the core region, distortion is maximum. | mechanical_behaviour | |
22f10c81 | A 275 kV TL has following line constants A=0.85ʟ5o, B=200ʟ75o. The active power angle such that the voltage to be maintained at the other end will be 275 kV ______________ | [
"22",
"16",
"18",
"24"
] | A | |Vs|=|Vr|=275 kV
α= 5o , β= 75o
<img src="https://www.sanfoundry.com/wp-content/uploads/2017/11/power-systems-questions-answers-switchgear-protection-3-q5.png" alt="power-systems-questions-answers-switchgear-protection-3-q5" width="617" height="200" class="alignnone size-full wp-image-182805" srcset="https://www.sanfou... | power_systems | |
fa999e97 | Which search uses only the linear space for searching? | [
"Best-first search",
"Recursive best-first search",
"Depth-first search",
"None of the mentioned"
] | B | Recursive best-first search will mimic the operation of standard best-first search, but using only the linear space. | artificial_intelligence | |
00907c56 | The critical moisture content is the point in which the _____________ | [
"Constant rate period ends",
"Constant rate period starts",
"Falling rate period ends",
"Initial heating period starts"
] | A | The falling rate period-
<img src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-profile-drying-curves-q10.png" alt="heat-transfer-operations-questions-answers-temperature-profile-drying-curves-q10" width="349" height="248" class="alignnone size-full wp-im... | heat_transfer_operations | |
84132b0b | What is the number of possible 3 x 3 affine cipher transformations ? | [
"168",
"840",
"1024",
"1344"
] | D | Since ‘A’ cannot have columns of ‘0’s. so there are ‘7’ choices i.e. 001/010/011/100/101/110/111. ‘a1’ is chosen for first column of ‘A.
We have ‘6’ choices for second column, let ‘a2’ be chosen for second column.
The final column can be any 3-tuple except 0, a1, a2, a1+a2. That means any one of the remaining ‘4’ 3-tup... | cryptograph_&_network_security | |
4b1d243b | What is the number of vibrational degrees of freedom in C6H5CH3? | [
"39",
"15",
"18",
"40"
] | A | C6H5CH3 is nonlinear.
No. of vibration degree of freedom = 3N – 6
= 3(15) – 6 = 39. | organic_chemistry | |
e86eed9c | Autocorrelation function of white noise will have? | [
"Strong peak",
"Infinite peak",
"Weak peak",
"None of the mentioned"
] | A | Autocorrelation function curve of continuous time white noise signal has a strong peak. | digital_communications | |
96379b97 | 3. What will be the output of the following Python code?<div class="hk1_style-wrap4"><div class="hk1_style-wrap3"><div class="hk1_style-wrap2"><div class="hk1_style-wrap"><div class="hk1_style"><div class="python"><pre class="de1"><span class="kw1">import</span> <span class="kw3">copy</span> a<span class="sy0">=</span>... | [
"[10,34,56,[95]]",
"[10,23,56,[78]]",
"[10,23,56,[95]]",
"[10,34,56,[78]]"
] | D | The zip function combines the individual attributes of the lists into a list of tuples. | python | |
3463bf17 | When the air temperature rises, the saturation vapor pressure | [
"Increases",
"Decreases",
"Remains same",
"None of the mentioned"
] | A | When the air temperature rises, the saturation vapor pressure increases. | chemical_process_calculation | |
d9969d99 | Which of the following is a source of electrode for aluminum industry? | [
"Naphtha and fuel oil",
"LPG",
"Petroleum coke",
"Ethane"
] | A | The statement is true as LPG extracted from natural gas contains butane and propane which can be cracked into olefins. LPG can be transported in pipelines as liquid. | chemical_technology | |
fa6e27c5 | The data is stored on the disk in the form of blocks called _____ | [
"Pages",
"Frames",
"Sectors",
"Tables"
] | C | The data is stored on the disk in the form of a collection of blocks called as sectors. | computer_architecture | |
883ba10c | RFC choke is placed in Colpitts oscillator instead of resistor is to provide _________ | [
"High impedance to DC",
"High resistance to DC",
"Low resistance to DC",
"Less bulkiness"
] | C | RFC choke present in Colpitts oscillator is to provide high reactance to AC oscillation and low reactance to DC supply to improve performance. If resistor is used there will be some power loss in DC biasing which is unnecessary. | analog_circuits | |
cb38723f | For natural and cost-effective ventilation, ________ can be used. | [
"Hollow bricks",
"Wall openings",
"Skylight",
"Brick jali"
] | D | Bricks are arranged in such a way that a jali (hole) is formed. These provide cross ventilation, natural lighting and reduction in cost greatly. They can be used in parapets, living rooms, etc. | basic_civil_engineering | |
0d93ff17 | To remove a relation from an SQL database, we use the ______ command. | [
"Delete",
"Purge",
"Remove",
"Drop table"
] | D | Drop table deletes the whole structure of the relation .purge removes the table which cannot be obtained again. | database_management | |
881a9f11 | Suppose Brinell hardness measurement is made from a nonstandard ball of diameter 5 mm. If the load applied in 10 mm standard ball is 3000 kg, then what load should be applied on the 5 mm ball to get the consistent reading in hardness measurement? | [
"500 kg",
"250 kg",
"750 kg",
"1500 kg"
] | B | The Brinell hardness number is given as:
\(\frac{P}{πDt}\)
The unit of P is kg and D and t are in mm.
So the unit will become kg/mm2. | mechanical_metallurgy | |
7e8410d8 | Which of the following is an essential requirement for a peak load plant ___________ | [
"Capability of working continuously",
"Low operating cost",
"Capability of quick start",
"Economical and speedy repair"
] | C | The power plants to be employed as peak load plant should only have the capability of quick start, synchronization and taking up of system load and quick response to load variations. | power_systems | |
8792169f | Find the value of eπ⁄4√2 | [
"1.74",
"1.84",
"1.94",
"1.64"
] | A | Let, f(x) = exSin(x), f(0) = 1
Now, the expansion of xSin(x) is \(x^2-\frac{x^3}{3!}+\frac{x^6}{5!}+….\)
Hence, \(e^xSin(x)=e^y=1+y+\frac{y^2}{2!}+\frac{y^3}{3!}+….\)
Hence,
\(e^{xSin(x)}=1+(x^2-\frac{x^4}{3!}+\frac{x^6}{6!}+…..)+\frac{(x^2-\frac{x^4}{3!}+\frac{x^6}{6!}+…..)^2}{2!}\)
\(+\frac{(x^2-\frac{x^4}{3!}+\fr... | engineering_mathematics | |
5dbaddc6 | The second law of thermodynamics states that? | [
"Entropy of an isolated system can never decrease over time",
"Entropy of a pure crystalline substance at 0K is 0",
"Energy is conserved",
"Entropy of a system can never decrease"
] | C | The second law of thermodynamics fundamentally disallows many processes that may be consistent with the law of conservation of energy. It says that entropy change in an irreversible process has to be positive. This means that heat given to an engine can’t all be converted into work. Therefore, efficiency cannot be 1. | physics_mcqs_-_class_11.json | |
3513d7aa | Superposition principle states that at a time __________ source(S) acts. | [
"All the given sources",
"Only voltage sources",
"Only one source",
"Only current sources"
] | B | According to Superposition principle response in one element is the algebraic sum of responses by individual sources acting alone while other sources are non-operative. | electric_circuits | |
def103f0 | To create a pointer to a private data member of a class, outside the class, which among the following is correct? | [
"Return the address of the private data member using a member function",
"Access the private member using a pointer outside class",
"Declare the member as pointer inside the class",
"Not possible to create pointer to a private member"
] | A | We can call a public member function and return the address of any private data member. Though the pointer being returned must be defined inside class itself. And the returned address can be stored in a pointer. | object_oriented_programming | |
8e9d676f | Which of the following cell is a multipotent cell? | [
"T-cell",
"B-cell",
"HSC",
"Monocytes"
] | C | Hematopoitic stem cell (HSC) can give rise to a number of cells by following two pathways and known as a multipotent cell. One pathway gives lymphoid progenitor cell while others give myeloid progenitor cell. | life_sciences | |
89a86240 | If nth derivative of eax sin(bx+c) cos(bx+c) is, eax rn sin(bx+c+nα⁄2) cos(bx+c+nα⁄2) then, | [
"r = \\(\\sqrt{a^2+b^2}, \\alpha=tan^{-1}\\frac{b}{a}\\)",
"r = \\(\\sqrt{a^2+4b^2}, \\alpha=tan^{-1}\\frac{2b}{a}\\)",
"r = \\(\\sqrt{a^2+8b^2}, \\alpha=tan^{-1}\\frac{4b}{a}\\)",
"r = \\(\\sqrt{a^2+16b^2}, \\alpha=tan^{-1}\\frac{4b}{a}\\)"
] | B | y = eax sin(bx+c) cos(bx+c)
y = eax sin2(bx+c)/2
yn = eax rn sin(2(bx+c+nα/2))/2
yn = eax rn sin(bx+c+nα/2) cos(bx+c+nα/2)
where
r = \(\sqrt{a^2+4b^2}\), α = tan-12b/a. | engineering_mathematics | |
6cd6358d | Which operator a pointer object of a class uses to access its data members and member functions? | [
".",
"->",
":",
"::"
] | B | ->(arrow operator) is used by a pointer object to access members of its class. | c++ | |
873e9de2 | How are default arguments specified in the function heading? | [
"identifier followed by an equal to sign and the default value",
"identifier followed by the default value within backticks (“)",
"identifier followed by the default value within square brackets ([])",
"identifier"
] | A | Refer documentation. | python | |
4786a5a2 | How is the render time calculated? | [
"Date.Now()",
"Date.Now() – performance.timing.domLoading",
"performance.domLoading",
"Date.Now() – performance.domLoading"
] | B | The rendering engine parses the HTML and the CSS and displays the parsed content on the screen. The render time is calculated as Date.Now() – performance.timing.domLoading. | javascript | |
3297a5db | Which of the following enzyme is used to fix CO2 through Calvin cycle? | [
"Ribose -1, 5- bisphosphate carboxylase",
"Ribulose -1, 6- bisphosphate carboxylase",
"Ribose -1, 6- bisphosphate carboxylase",
"Ribulose -1, 5- bisphosphate carboxylase"
] | B | Calvin cycle takes place in the stroma of the chloroplast of the cell. The stroma contains the necessary energy compounds for the preparation of carbohydrate. | cell_biology | |
4a6d1e7f | What is the one’s complement of the number 1010110? | [
"1111111",
"0101001",
"1100110",
"None of the mentioned"
] | B | While taking 1’s complement we replace 1 with zero and vice versa. | discrete_mathematics | |
69f968f1 | In case of BT instruction, if the bit position in the destination operand specified by the source operand, is ‘1’, then | [
"zero flag is reset",
"carry flag is set",
"VM flag is set",
"RF flag is reset"
] | B | In case of BT instruction, if the bit position in the destination operand specified by the source operand, is ‘1’, the carry flag is set, otherwise it is cleared. | microprocessor | |
d05bb723 | 1. The real part of the propagation constant is the | [
"Attenuation constant",
"Phase constant",
"Permittivity",
"Permeability"
] | A | The propagation constant is given by γ = α + jβ. Here the real part is the attenuation constant and the imaginary part is the phase constant. | electromagnetic_theory | |
9b301e86 | 8. Find the work done moving a charge 2C having potential V = 24volts is | [
"96",
"24",
"36",
"48"
] | A | E = -Grad (V) = -Grad(20/(x2 + y2)) = -(-40x i /(x2 + y2)2 – 40(y j)/(x2 + y2)2) = 40(x i + y j)/(x2 + y2)2. Thus the statement is true. | electromagnetic_theory | |
8afecfd5 | What is the relation between the interaction parameter, ‘b’, and atomic radius, R, for the Photoelectric effect? | [
"b > R",
"b ≈ R",
"b < R",
"no relation between b and R"
] | A | If b > R, it means the interaction parameter is greater than the atomic radius. In this case, the electron is ejected by the photon and it is known as the Photoelectric effect.
If b ≈ R, the incident photons are scattered by the electron of the atom and the electron itself gets scattered. This phenomenon is known as t... | engineering_physics_i | |
cf3d37e5 | Which of the following standard connect distributed hosts or tenants to their provisioned storage in the cloud? | [
"CDMI",
"OCMI",
"COA",
"All of the mentioned"
] | A | CDMI stands for Cloud Data Management Interface. | cloud_computing | |
cca4d500 | What is an operating system? | [
"collection of programs that manages hardware resources",
"system service provider to the application programs",
"interface between the hardware and application programs",
"all of the mentioned"
] | D | An Operating System acts as an intermediary between user/user applications/application programs and hardware. It is a program that manages hardware resources. It provides services to application programs. | operating_system | |
805a51f6 | What is the z-transform of the signal defined as x(n)=u(n)-u(n-N)? | [
"\\(\\frac{1+z^N}{1+z^{-1}}\\)",
"\\(\\frac{1-z^N}{1+z^{-1}}\\)",
"\\(\\frac{1+z^{-N}}{1+z^{-1}}\\)",
"\\(\\frac{1-z^{-N}}{1-z^{-1}}\\)"
] | D | We know that \(Z{u(n)}=\frac{1}{1-z^{-1}}\)
And by the time shifting property, we have Z{x(n-k)}=z-k.Z{x(n)}
=>Z{u(n-N)}=\(z^{-N}.\frac{1}{1-z^{-1}}\)
=>Z{u(n)-u(n-N)}=\(\frac{1-z^{-N}}{1-z^{-1}}\). | digital_signal_processing | |
656193bf | While using encapsulation, which among the following is possible? | [
"Code modification can be additional overhead",
"Data member’s data type can be changed without changing any other code",
"Data member’s type can’t be changed, or whole code have to be changed",
"Member functions can be used to change the data type of data members"
] | B | Data member’s data type can be changed without changing any further code. All the members using that data can continue in the same way without any modification. Member functions can never change the data type of same class data members. | object_oriented_programming | |
2ab81182 | Interchange factor for infinitely long concentric cylinders is given by | [
"1/ [A1/A2 (1/E 2 – 1)].",
"[1/E 1 + A1/A2 (1/E 2 – 1)].",
"2/ [1/E 1 + A1/A2 (1/E 2 – 1)].",
"1/ [1/E 1 + A1/A2 (1/E 2 – 1)]."
] | B | Q 12 = F 12 A 1 σ b (T 14 – T 24). F 12 = 0.85 and A 1 = (0.25)2 + 4(1.5) (0.25) = 1.5625 m2. | heat_transfer | |
b17db829 | Which process forms the randomized binary search tree? | [
"Stochastic Process",
"Branching Process",
"Diffusion Process",
"Aggregation Process"
] | A | The randomized binary search tree is formed by the stochastic process. The stochastic process or also called random process is a mathematical tool or object including random variables. | data_structures_&_algorithms_i | |
88c17939 | In query processing, the ___________ is the lowest-level operator to access data. | [
"Index Search",
"Linear search",
"File scan",
"Access paths"
] | C | File scans are search algorithms that locate and retrieve records that fulfill a selection condition. | database_management | |
68510984 | A simple pendulum is attached to the roof of a lift. If the time period of oscillation, when the lift is stationary is T, then the frequency of oscillation when the lift falls freely, will be ___________ | [
"Zero",
"T",
"1/T",
"∞"
] | A | At x1 = 5 cm,
U1=1/2×k(x1)2=1/2×800×0.052=1J
At x2=15cm,
U2=1/2×k(x2)2=1/2×800×0.152=9J
W=U2-U1=9-1=8J. | engineering_physics_i | |
c469dae4 | In the back suction control mechanism, if the valve is closed, the float chamber pressure will ____________ the pressure at the venturi throat. | [
"equalize with",
"increase",
"decrease",
"none of the mentioned"
] | A | Generally, in the back suction control mechanism, if the valve is closed, the float chamber pressure will equalize with the pressure at the venturi throat and no fuel can flow. | ic_engine | |
71c3bb1b | What is the phase-shift between input and output voltages of CE amplifier? | [
"90°",
"120°",
"180°",
"270°"
] | C | During the amplification method of RC coupled CE amplifier, there is a phase shift of about 180o between input and output. Basically, the output is said to be reversed version of input.
The magnitude of output voltage becomes higher as compared to that of input signal but the shape is correctly similar to that of an in... | electronic_devices_&_circuits |
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