question stringlengths 10 867 | subject stringclasses 24
values | choices listlengths 4 4 | answer stringclasses 4
values |
|---|---|---|---|
What would be then consequences for the OLS estimator if heteroscedasticity is present in a regression model but ignored? | econometrics | [
"It will be biased",
"It will be inconsistent",
"It will be inefficient",
"All of (a), (b) and (c) will be true."
] | C |
Suppose now that a researcher wishes to use information criteria to determine the optimal lag length for a VAR. 500 observations are available for the bi-variate VAR, and the values of the determinant of the variance-covariance matrix of residuals are 0.0336, 0.0169, 0.0084, and 0.0062 for 1, 2, 3, and 4 lags respectiv... | econometrics | [
"1 lag",
"2 lags",
"3 lags",
"4 lags"
] | C |
In an SR latch built from NOR gates, which condition is not allowed | electrical_engineering | [
"S=0, R=0",
"S=0, R=1",
"S=1, R=0",
"S=1, R=1"
] | D |
In a 2 pole lap winding dc machine , the resistance of one conductor is 2Ω and total number of conductors is 100. Find the total resistance | electrical_engineering | [
"200Ω",
"100Ω",
"50Ω",
"10Ω"
] | C |
The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 240*10-6 N-m on full scale. If magnetic flux density is 1Wb/m2 range of meter is | electrical_engineering | [
"1 mA.",
"2 mA.",
"3 mA.",
"4 mA."
] | B |
Two long parallel conductors carry 100 A. If the conductors are separated by 20 mm, the force per meter of length of each conductor will be | electrical_engineering | [
"100 N.",
"0.1 N.",
"1 N.",
"0.01 N."
] | B |
A point pole has a strength of 4π * 10^-4 weber. The force in newtons on a point pole of 4π * 1.5 * 10^-4 weber placed at a distance of 10 cm from it will be | electrical_engineering | [
"15 N.",
"20 N.",
"7.5 N.",
"3.75 N."
] | A |
The population of the city where Michelle was born is 145,826. What is the value of the 5 in the number 145,826? | elementary_mathematics | [
"5 thousands",
"5 hundreds",
"5 tens",
"5 ones"
] | A |
Olivia used the rule "Add 11" to create the number pattern shown below. 10, 21, 32, 43, 54 Which statement about the number pattern is true? | elementary_mathematics | [
"The 10th number in the pattern will be an even number.",
"The number pattern will never have two even numbers next to each other.",
"The next two numbers in the pattern will be an even number then an odd number.",
"If the number pattern started with an odd number then the pattern would have only odd numbers ... | B |
A total of 30 players will play basketball at a park. There will be exactly 5 players on each team. Which statement correctly explains how to find the number of teams needed? | elementary_mathematics | [
"Add 5 to 30 to find 35 teams.",
"Divide 30 by 5 to find 6 teams.",
"Multiply 30 and 5 to find 150 teams.",
"Subtract 5 from 30 to find 25 teams."
] | B |
A store sells 107 different colors of paint. They have 25 cans of each color in storage. The number of cans of paint the store has in storage can be found using the expression below. 107 × 25. How many cans of paint does the store have in storage? | elementary_mathematics | [
"749",
"2,675",
"2,945",
"4,250"
] | B |
Which expression is equivalent to 5 x 9? | elementary_mathematics | [
"(5 x 4) x (6 x 5)",
"(5 x 5) + (5 x 4)",
"(5 x 5) + (5 x 9)",
"(5 x 9) x (6 x 9)"
] | B |
Which of the following is not a way to form recombinant DNA? | high_school_biology | [
"Translation",
"Conjugation",
"Specialized transduction",
"Transformation"
] | A |
A mutation in a bacterial enzyme changed a previously polar amino acid into a nonpolar amino acid. This amino acid was located at a site distant from the enzyme’s active site. How might this mutation alter the enzyme’s substrate specificity? | high_school_biology | [
"By changing the enzyme’s pH optimum",
"By changing the enzyme’s location in the cell",
"By changing the shape of the protein",
"An amino acid change away from the active site cannot alter the enzyme’s substrate specificity."
] | C |
In animal cells, which of the following represents the most likely pathway that a secretory protein takes as it is synthesized in a cell? | high_school_biology | [
"Plasma membrane–Golgi apparatus–ribosome–secretory vesicle–rough ER",
"Ribosome–Golgi apparatus–rough ER–secretory vesicle–plasma membrane",
"Plasma membrane–Golgi apparatus–ribosome–secretory vesicle–rough ER",
"Ribosome–rough ER–Golgi apparatus–secretory vesicle–plasma membrane"
] | D |
Which of the following is not known to be involved in the control of cell division? | high_school_biology | [
"Cyclins",
"Protein kinases",
"Checkpoints",
"Fibroblast cells"
] | D |
Homologous structures are often cited as evidence for the process of natural selection. All of the following are examples of homologous structures EXCEPT | high_school_biology | [
"the wings of a bird and the wings of a bat",
"the flippers of a whale and the arms of a man",
"the pectoral fins of a porpoise and the flippers of a seal",
"the forelegs of an insect and the forelimbs of a dog"
] | D |
Which of the following is considered an acid anhydride? | high_school_chemistry | [
"HCl",
"H2SO3",
"SO2",
"Al(NO3)3"
] | C |
Which of the following is expected to be a polar molecule? | high_school_chemistry | [
"PCl4F",
"BF3",
"CO2",
"Si(CH3)4"
] | A |
From the solubility rules, which of the following is true? | high_school_chemistry | [
"All chlorides, bromides, and iodides are soluble",
"All sulfates are soluble",
"All hydroxides are soluble",
"All ammonium-containing compounds are soluble"
] | D |
A new compound is synthesized and found to be a monoprotic acid with a molar mass of 248 g/mol. When 0.0050 mol of this acid are dissolved in 0.500 L of water, the pH is measured as 3.89. What is the pKa of this acid? | high_school_chemistry | [
"3.89",
"7.78",
"5.78",
"2.33"
] | C |
A solution contains 2.00 mole of acetic acid, CH3COOH, and 1.00 mole of calcium acetate, Ca(CH3COO)2. The solution is able to resist the addition of a small amount of strong acid or strong base with only minor changes in the pH of the solution. Larger quantities of strong acid or strong base can cause a significant cha... | high_school_chemistry | [
"0.500 mole",
"1.00 mole",
"2.00 mole",
"3.00 mole"
] | C |
Which of the following is an example of the use of a device on the Internet of Things (IoT) ? | high_school_computer_science | [
"A car alerts a driver that it is about to hit an object.",
"A hiker uses a G P S watch to keep track of her position.",
"A refrigerator orders milk from an online delivery service when the milk in the refrigerator is almost gone.",
"A runner uses a watch with optical sensors to monitor his heart rate."
] | C |
Many Web browsers allow users to open anonymous windows. During a browsing session in an anonymous window, the browser does not record a browsing history or a list of downloaded files. When the anonymous window is exited, cookies created during the session are deleted. Which of the following statements about browsing s... | high_school_computer_science | [
"The activities of a user browsing in an anonymous window will not be visible to people who monitor the user's network, such as the system administrator.",
"Items placed in a Web store's shopping cart for future purchase during the anonymous browsing session will not be saved on the user's computer.",
"A user w... | B |
What is the output of "abc"[::-1] in Python 3? | high_school_computer_science | [
"Error",
"abc",
"cba",
"c"
] | C |
In the program below, the initial value of x is 5 and the initial value of y is 10.
IF (X < O)
{
DISPLAY ("Foxtrot")
}
ELSE
{
IF (X > y)
{
DISPLAY ("Hotel")
}
ELSE
{
IF (y > O)
{
DISPLAY ("November")
}
ELSE
{
DISPLAY ("Yankee")
}
}
}
What is displayed as a result of running t... | high_school_computer_science | [
"Foxtrot",
"Hotel",
"November",
"Yankee"
] | C |
A list of numbers has n elements, indexed from 1 to n. The following algorithm is intended to display the number of elements in the list that have a value greater than 100. The algorithm uses the variables count and position. Steps 3 and 4 are missing.
Step 1: Set count to 0 and position to 1.
Step 2: If the value of... | high_school_computer_science | [
"Step 3: Increase the value of position by 1.\n Step 4: Repeat steps 2 and 3 until the value of count is greater than 100.",
"Step 3: Increase the value of position by 1.\n Step 4: Repeat steps 2 and 3 until t he value of position is greater than n.",
"Step 3: Repeat step 2 until the value of count is greater t... | D |
Joe was in charge of lights for a dance. The red light blinks every two seconds, the yellow light every three seconds, and the blue light every five seconds. If we include the very beginning and very end of the dance, how many times during a seven minute dance will all the lights come on at the same time? (Assume that ... | high_school_mathematics | [
"3",
"15",
"6",
"5"
] | B |
Five thousand dollars compounded annually at an $x\%$ interest rate takes six years to double. At the same interest rate, how many years will it take $\$300$ to grow to $\$9600$? | high_school_mathematics | [
"12",
"1",
"30",
"5"
] | C |
The variable $x$ varies directly as the square of $y$, and $y$ varies directly as the cube of $z$. If $x$ equals $-16$ when $z$ equals 2, what is the value of $x$ when $z$ equals $\frac{1}{2}$? | high_school_mathematics | [
"-1",
"16",
"-\\frac{1}{256}",
"\\frac{1}{16}"
] | C |
Simplify and write the result with a rational denominator: $$\sqrt{\sqrt[3]{\sqrt{\frac{1}{729}}}}$$ | high_school_mathematics | [
"\\frac{3\\sqrt{3}}{3}",
"\\frac{1}{3}",
"\\sqrt{3}",
"\\frac{\\sqrt{3}}{3}"
] | D |
Ten students take a biology test and receive the following scores: 45, 55, 50, 70, 65, 80, 40, 90, 70, 85. What is the mean of the students’ test scores? | high_school_mathematics | [
"55",
"60",
"62",
"65"
] | D |
Which of the following conditions will ensure that angular momentum is conserved? I. Conservation of linear momentum II. Zero net external force III. Zero net external torque | high_school_physics | [
"I and II only",
"I and III only",
"II and III only",
"III only"
] | D |
A pipe full of air is closed at one end. A standing wave is produced in the pipe, causing the pipe to sound a note. Which of the following is a correct statement about the wave’s properties at the closed end of the pipe? | high_school_physics | [
"The pressure is at a node, but the particle displacement is at an antinode.",
"The pressure is at an antinode, but the particle displacement is at a node.",
"The pressure and the particle displacement are both at nodes.",
"The pressure and the particle displacement are both at antinodes."
] | B |
A photocell of work function ϕ = 2eV is connected to a resistor in series. Light of frequency f = 1 × 10^15 Hz hits a metal plate of the photocell. If the power of the light is P = 100 W, what is the current through the resistor? | high_school_physics | [
"2:00 AM",
"6:00 AM",
"12:00 AM",
"24 A"
] | D |
A microwave oven is connected to an outlet, 120 V, and draws a current of 2 amps. At what rate is energy being used by the microwave oven? | high_school_physics | [
"10 W",
"30 W",
"60 W",
"240 W"
] | D |
A point charge, Q = +1 mC, is fixed at the origin. How much work is required to move a charge, Q = +8 µC, from the point (0, 4 meters) to the point (3 meters, 0)? | high_school_physics | [
"3.5 J",
"6.0 J",
"22.5 J",
"40 J"
] | B |
A 6-sided die is rolled 15 times and the results are: side 1 comes up 0 times; side 2: 1 time; side 3: 2 times; side 4: 3 times; side 5: 4 times; side 6: 5 times. Based on these results, what is the probability of side 3 coming up when using Add-1 Smoothing? | machine_learning | [
"2.0/15",
"1.0/7",
"3.0/16",
"1.0/5"
] | B |
Which image data augmentation is most common for natural images? | machine_learning | [
"random crop and horizontal flip",
"random crop and vertical flip",
"posterization",
"dithering"
] | A |
You are reviewing papers for the World’s Fanciest Machine Learning Conference, and you see submissions with the following claims. Which ones would you consider accepting? | machine_learning | [
"My method achieves a training error lower than all previous methods!",
"My method achieves a test error lower than all previous methods! (Footnote: When regularisation parameter λ is chosen so as to minimise test error.)",
"My method achieves a test error lower than all previous methods! (Footnote: When regula... | C |
To achieve an 0/1 loss estimate that is less than 1 percent of the true 0/1 loss (with probability 95%), according to Hoeffding's inequality the IID test set must have how many examples? | machine_learning | [
"around 10 examples",
"around 100 examples",
"between 100 and 500 examples",
"more than 1000 examples"
] | D |
Traditionally, when we have a real-valued input attribute during decision-tree learning we consider a binary split according to whether the attribute is above or below some threshold. Pat suggests that instead we should just have a multiway split with one branch for each of the distinct values of the attribute. From th... | machine_learning | [
"It is too computationally expensive.",
"It would probably result in a decision tree that scores badly on the training set and a testset.",
"It would probably result in a decision tree that scores well on the training set but badly on a testset.",
"It would probably result in a decision tree that scores well ... | C |
Large triplet repeat expansions can be detected by: | medical_genetics | [
"polymerase chain reaction.",
"single strand conformational polymorphism analysis.",
"Southern blotting.",
"Western blotting."
] | C |
DNA ligase is | medical_genetics | [
"an enzyme that joins fragments in normal DNA replication",
"an enzyme of bacterial origin which cuts DNA at defined base sequences",
"an enzyme that facilitates transcription of specific genes",
"an enzyme which limits the level to which a particular nutrient reaches"
] | A |
A gene showing codominance | medical_genetics | [
"has both alleles independently expressed in the heterozygote",
"has one allele dominant to the other",
"has alleles tightly linked on the same chromosome",
"has alleles expressed at the same time in development"
] | A |
Which of the following conditions does not show multifactorial inheritance? | medical_genetics | [
"Pyloric stenosis",
"Schizophrenia",
"Spina bifida (neural tube defects)",
"Marfan syndrome"
] | D |
The stage of meiosis in which chromosomes pair and cross over is: | medical_genetics | [
"prophase I",
"metaphase I",
"prophase II",
"metaphase II"
] | A |
In a cohort study, the risk ratio of developing diabetes was 0.86 when comparing consumers of tea (the exposed) to those who did not drink tea (the unexposed). Which one statement is correct (according to knowledge in 2020)?
| nutrition | [
"The tea drinkers have lower risk of developing diabetes.",
"The tea drinkers have higher risk of developing diabetes.",
"Based on the information given we cannot tell if the observed difference in disease risk is the result of chance.",
"The risk ratio is close to the value one, so there is no difference in ... | C |
Which of the following statements is correct (according to knowledge in 2020)?
| nutrition | [
"Consumers with phenylketonuria must avoid the consumption of the sweetener aspartame",
"Consumers with phenylketonuria must avoid the consumption of the sweetener saccharin",
"Consumers with phenylketonuria must avoid the consumption of the sweetener sucralose",
"Consumers with phenylketonuria must avoid the... | A |
Which of the following is the most plausible explanation for the protective effect of dietary fibre against cancer of the colon, as of 2020?
| nutrition | [
"Propionic acid, formed during colonic fibre fermentation inhibits liver fatty acid synthesis",
"Butyric acid, formed during colonic fibre fermentation stimulates \"silencing\" of the SLC5A8 tumour suppressor gene",
"None of these options are correct",
"Butyric acid, formed during colonic fibre fermentation s... | D |
Which of the following statements about iodine is correct, as of 2020?
| nutrition | [
"50% of adults consume iodine at levels below the RNI",
"Dairy products are a poor source of iodine",
"The iodine content of organic milk is generally lower that the level in non-organic milk",
"UK dietary reference values recommend an increase in iodine intake in pregnancy"
] | C |
What is the first-line drug for patients with type 2 diabetes and obesity, as of 2020?
| nutrition | [
"Acarbose",
"Metformin",
"Sulphonylureas",
"Insulin"
] | B |
Why are parvoviruses a highly impactful parasite? | virology | [
"Because they have no nucleic acid",
"They require a helper virus",
"Only replicate in dividing cells",
"Can integrate into host chromosomes"
] | A |
Which of the following is a morphological characteristic of the paramyxoviruses. | virology | [
"Fragile viruses often visualised with RNA spewing from the inside",
"Elongate viruses",
"Icosahedral viruses with envelope",
"Very large viruses"
] | A |
A key factor facilitating the application of nested case-control studies from the MACS was: | virology | [
"Data collection",
"Establishment of a repository of biologic specimens",
"Participant interest",
"Administration of the questionnaire by staff"
] | B |
The most important goal of a behavioral intervention is: | virology | [
"Change in behavior",
"Comprehensive coverage",
"Effective use of behavioral theory",
"Sustained behavior change"
] | D |
The median survival time to AIDS and death was established by following: | virology | [
"Seroprevalent HIV-infected individuals",
"Seronegatives",
"Seroconverters",
"High-risk seronegatives"
] | C |
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