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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What molecules are usually insoluble in water? A. ions B. non-polar C. polar D. acids Answer:
B
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What do electric fans cool? A. energy B. kinetic energy C. Human skin D. sensory neurons E. an object F. deuterostomes G. heat energy H. the skin Answer:
C
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. When happens to condensed water vapor when it reaches certain points? A. turns gelatinous B. evaporates C. colder weather D. Winter E. becomes solid F. Heat energy G. The atmosphere H. forms a b...
B
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Which protocol does \emph{not} use RC4. A. WEP B. WPA C. WPA2 D. TLS Answer:
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. If the first column of matrix L is (0,1,1,1) and all other entries are 0 then the authority values A. (0, 1, 1, 1) B. (0, 1/sqrt(3), 1/sqrt(3), 1/sqrt(3)) C. (1, 1/sqrt(3), 1/sqrt(3), 1/sqrt(3))...
B
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. which of these would result in reversal of desertification? A. sowing a seed for each felled tree B. cutting down as many trees as possible C. taking all the water away from deserts D. all of th...
A
openbookqa
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Grasses such as wheat, rice, and corn are examples of fibrous root systems. fibrous root systems are found in monocots; tap root systems are found in these? A. mosses B. dicots C. monocots D. gy...
B
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. In x86, what are the possible ways to transfer arguments when invoking a system call? For example, in the following code, string and len are sys_cputs’s arguments. A. Stack B. Registers C. Instr...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Solid-state radiation detectors convert ionization produced in a semiconductor (like those found in computer chips) directly into what? A. electrical signal B. thermal energy C. microwaves D. is...
A
sciq
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. what are heterotrophs? A. sheep B. cats C. toads D. small E. koalas F. fungi G. bats H. Birds Answer:
B
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. The mean free path for a gaseous molecule will be hundreds of times the what of the molecule? A. weight B. diameter C. variation D. density Answer:
B
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Who would likely need a compass? A. a fish B. a taxi driver C. a bobcat D. a seaman Answer:
D
openbookqa
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What causes flooding? A. dryness B. droughts C. sunlight D. deluges Answer:
D
openbookqa
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Consider the following context-free grammar \(G\) (where \(\text{S}\) is the top-level symbol): \(R_{01}: \text{S} \rightarrow \text{NP VP}\) \(R_{02}: \text{NP} \rightarrow \text{NP0}\) \(R_{0...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Which of the following statements are true about command injection? A. The root cause of command injection is the lack of distinction between data plane and control/code plane. B. Co...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. what do frogs use skin to breathe in? A. Water B. chemicals C. oxygen D. liquid E. Smooth F. energy G. cellulose H. H20 Answer:
C
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. what falls making sunlight available to surrounding plants? A. LEDs B. grass C. elms D. oak E. pine F. clouds G. palm H. acorns Answer:
D
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. The molecular formula is still c 4 h 10 , which is the same formula as? A. carbon hydroxide B. propane C. chlorine D. butane Answer:
D
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Consider a binary classification problem with classifier $f(\mathbf{x})$ given by $$ f(\mathbf{x})= \begin{cases}1, & g(\mathbf{x}) \geq 0 \\ -1, & g(\mathbf{x})<0\end{cases} $$ and $\mathbf{x} ...
F
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Which of the following statements about libFuzzer is/are correct? A. Unit tests may serve as foundation to create libFuzzer fuzzing stubs. B. In libFuzzer’s default mode (not fork-mo...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Nearly all weather occurs in the lower part of what? A. the mesosphere B. the atmosphere C. the ionosphere D. the lithosphere Answer:
B
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Tick the \textbf{incorrect} assertion regarding WEP and WPA2. A. WPA2 seems to be more secure than WEP. B. WPA2 seems to ensure confidentiality. C. WPA2 uses AES. D. WEP seems to ensure message ...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What is the most durable species that breathes with gills as larvae and lungs as adults? A. Snakes B. Salamanders C. edible D. salmon E. Oak F. Frogs G. Lizards H. a fish Answer:
F
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Are birds and mammals mainly exothermic or endothermic? A. exothermic B. hypothermic C. autotrophic D. endothermic Answer:
D
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What happens to ice? A. evaporation B. Condensation C. it grows D. it floats in air E. it freezes F. vaporization G. erosion H. it expands Answer:
H
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. An animal requires what for survival? A. a leash B. rocks C. chemicals D. stamina E. plants F. proteins G. food H. fossil fuel Answer:
E
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What is it called when the soils of the arctic tundra remain in a perennially frozen state? A. permafrost B. glacial domination C. permafreeze D. concentrated freeze Answer:
A
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. A shark will generally avoid eating fish that A. they are symbiotic with B. are their main prey C. are already bleeding out D. they like the taste of Answer:
A
openbookqa
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Light from a distant galaxy can travel different paths to the earth because it is bent around an intermediary galaxy by what? A. strength B. radiation C. gravity D. variation Answer:
C
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What unit of power is equal to 1 joule of energy per second? A. watt B. volt C. hertz D. byte Answer:
A
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What do biologists use microscopes for? A. rays or beams B. Deoxyribonucleicacid C. to listen for bacteria D. An object is seen E. mutations F. to record data G. to see quarks H. to see bacteria...
H
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. To make hydropower you need A. to burn fossil fuels B. to stop or slow moving water C. to fill a pool with water D. to put up windmills Answer:
B
openbookqa
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. A passive adversary can \ldots Question Options: 1. do nothing. 2. only listen to communications. 3. only interfere with client or server communications. 4. only replace some communication messa...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Tick the \textbf{true} assertion. A. It is asymptotically harder to do a collision than to do a preimage attack. B. The probability that a random number is prime increases whith the increase of ...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What could you use to thaw something quickly? A. water vapor B. a refrigerator C. a freezer D. ice Answer:
A
openbookqa
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. The mass lost in mass defect has gone into energy called what? A. enthalpy B. binding energy C. momentum D. kinetic energy Answer:
B
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Tick the \emph{false} assertion. The ambiguity issue in the decryption algorithm of the Rabin cryptosystem can be solved by\dots A. encrypting the message twice. B. encrypting the message append...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Which of these produces hydropower? A. deuterostomes B. Wind Turbines C. power stations D. Suez Canal E. trout F. Old Faithful Geyser G. Hoover Dam H. stations Answer:
G
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Select which statements are true about the CYK algorithm.A penalty will be applied for any incorrect answers. A. It is a top-down chart parsing algorithm. B. Its time complexity is \( O(n^3) \),...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Being exposed to wind can cause the natural wearing away of what? A. light B. rocks C. wind D. soil E. water F. roots G. cracks H. earth Answer:
D
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What is the term for anything that has mass and volume? A. energy B. gass C. liquid D. matter Answer:
D
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. In Text Representation learning, which of the following statements is correct? A. Learning GloVe vectors can be done using SGD in a streaming fashion, by streaming through the input text only on...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Like people with type 1 diabetes, people with type 2 diabetes must frequently check what level? A. glucose B. blood sugar C. pulse D. heartbeat Answer:
B
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Conductive losses in the middle ear can be partially overcome by sending sound vibrations to what structure through the skull, the principle behind implants for hearing loss patients? A. cornea ...
D
sciq
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Lungs are to hampsters as ________ are black tipped sharks. A. gills B. hearts C. stomachs D. fins Answer:
A
openbookqa
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. For a $n$-bit block cipher with $k$-bit key, given a plaintext-ciphertext pair, a key exhaustive search has an average number of trials of \dots A. $2^n$ B. $2^k$ C. $\frac{2^n+1}{2}$ D. $\frac{...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Wind power, solar power, hydropower, and geothermal power are called renewable sources of energy or what other term? A. mandatory energy B. conservative energy C. specific energy D. alternative ...
D
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What causes a chemical reaction in an egg? A. sugar B. the water cycle C. cooking D. birds E. tapeworms F. courtship G. burning H. ovaries Answer:
C
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. what's leaves may increase as it grows? A. fern B. Green C. grass D. energy E. apples F. Trees G. edible H. oak Answer:
A
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Which antibacterial protein is found in tears and saliva? A. amino acid B. human growth hormone C. human lysozyme D. dopamine Answer:
C
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Evolving from a single common ancestor, what group of organisms was perhaps the dominant life form on earth 250 million years ago? A. proteins B. acids C. atoms D. fungi Answer:
D
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. For a user that has not done any ratings, which method can make a prediction? A. User-based collaborative RS B. Item-based collaborative RS C. Content-based RS D. None of the above Answer:
D
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Muscles can only what? A. movement B. Loose C. glucose D. resistance E. thrust F. squeeze G. jam H. bend Answer:
F
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What are most protist diseases in humans caused by? A. ticks B. lice C. eukaryots D. protozoa Answer:
D
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. An element symbol without a charge written next to it is assumed to be what? A. dead atom B. surfactants atom C. uncharged atom D. corroborate atom Answer:
C
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What insulator slows heat? A. hemp B. O3 C. Aves D. coat E. CFCs F. ice G. fur H. skin Answer:
F
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What will be the result of female sperm fusing with an egg to form a diploid zygote? A. baby girl B. pollen C. seeds D. allow growth E. Leptospirosis F. litter G. Plants growth H. offspring Answ...
A
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Consider the composite function $f(x)=g(h(x))$, where all functions are $\mathbb{R}$ to $\mathbb{R}$. Which of the following is the weakest condition that guarantees that $f(x)$ is convex? A. $g...
D
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What causes acid rain? A. Pesticides B. fossil fuels C. remains of prehistoric life D. chlorofluorocarbons E. energy of moving objects F. an erupting volcano G. harmful substances H. forest is d...
F
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Which of the following is WRONG for Ontologies? A. Different information systems need to agree on the same ontology in order to interoperate. B. They help in the integration of data expressed in...
D
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Which algorithm can be typically used in order to generate a prime number? A. The Left to Right Algorithm B. The Extended Euclidean Algorithm C. The Miller-Rabin Test D. The Tonelli Algorithm An...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What is the name of the encryption threat that corresponds to \emph{force the sender to encrypt some messages selected by the adversary}? A. Chosen Ciphertext Attack B. Chosen Plaintext Attack C...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. what does botulism affect? A. humans B. the skin C. plants D. our planet E. neurons F. people G. insects H. animals Answer:
E
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. In Ranked Retrieval, the result at position k is non-relevant and at k+1 is relevant. Which of the following is always true?Hint: P@k and R@k are the precision and recall of the result set consi...
C
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. When do glaciers deposit their sediment? A. when they form B. when they move C. when they melt D. when they are new Answer:
C
sciq
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What makes something that helps cells take up glucose from the blood? A. exercise B. sweating C. food D. blood flow E. acetic acid F. eye sockets G. protein cells H. pancreas Answer:
H
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What kind of oily substance is secreted from sebaceous glands? A. sebum B. Blood C. progesterone D. pus Answer:
A
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. You are using a 3-layer fully-connected neural net with \textbf{ReLU activations}. Your input data has components in [0, 1]. \textbf{You initialize your weights by sampling from $\mathcal{N}(-10...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Choose the \emph{incorrect} statement. A. The key is always sent alongside the commitment. B. Statisticaly hiding property is more desirable than computationally hiding. C. A commitment scheme c...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What is the breakdown of unstable elements into stable elements called? A. initial decay B. radioactive decrease C. radioactive decay D. thermal decay Answer:
C
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What can roundworms do? A. killing insects B. Make money C. survive D. Start fires E. Harm hosts F. Harm themselves G. protect them H. reproduce Answer:
E
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What is the largest planet in the solar system? A. pluto B. saturn C. jupiter D. mars Answer:
C
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What are zooplankton? A. microscopic B. infected C. huge D. storing water E. giant F. small G. Absorb light H. bioaerosols Answer:
A
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What two ways may catalyst be classified? A. oxygenated or heterogenous B. fast or slow C. reactive or nonreactive D. homogeneous or heterogeneous Answer:
D
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Peregrine falcons made an incredible recovery after laws were passed banning the use of what? A. Acetamiprid B. Carbaryl C. miticide D. ddt Answer:
D
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What engages in courtship? A. Males and females B. elephants C. fur seals D. it keeps an organism warm E. science F. Males and males G. books H. warm-blooded Answer:
A
qasc
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. a desert environment has low A. sand count B. cacti C. dryness D. wet sky falling Answer:
D
openbookqa
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Which of the following is well preserved by 2G? A. Confidentiality B. Message Integrity C. Challenge freshness D. Authentication of Mobile Station Answer:
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. The cause of a wildfire could be as simple as A. A water puddle B. tons of ice C. snow D. a ciggy Answer:
D
openbookqa
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What explains the spherical shape of ceres, once thought to be the largest asteroid? A. space debris B. low gravity C. orbital plane D. high gravity Answer:
D
sciq
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. How long did it take the Grand Canyon to form? A A. few amount of days B. very lengthy amount of time C. couple of billion dollars D. very few amount of minutes Answer:
B
openbookqa
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Let the first four retrieved documents be N N R R, where N denotes a non-relevant and R a relevant document. Then the MAP (Mean Average Precision) is: A. 1/2 B. 5/12 C. 3/4 D. 7/24 Answer:
B
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What kind of effect does a squirrel have on the ecosystem? A. Negative B. Positive C. adding heat D. growth E. food F. Destructive G. Powerful H. support Answer:
B
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What term describes weathering that occurs as water expands when it freezes, wedging apart rock? A. cleavage B. erosion C. chemical weathering D. mechanical weathering Answer:
D
sciq
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Which of the following are true regarding the lengths of integers in some base \(b\) (i.e., the number of digits base \(b\)) in different bases, given \(N = $(FFFF)_{16}$\)? A. \($(N)_2$\) is of...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What results when a force does work? A. momentum B. movement C. pressure D. side effect Answer:
B
sciq
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. In the wilderness, light pollution is? A. less B. stronger C. brighter D. more widespread Answer:
A
openbookqa
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Early in the development of a human fetus, the skeleton is made entirely of what? A. cartilage B. membrane C. anterior D. bones Answer:
A
sciq
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. For a blockcipher $B:\{0,1\}^k\times \{0,1\}^n \rightarrow \{0,1\}^n$ that has decorrelation $Dec^q_{\| \cdot \|_{\infty}}(B,C^*)=d$ (from a perfect cipher $C^*$), the best advantage of \textit{...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What are bones made up of? A. tissues B. platelets C. muscles D. molecules Answer:
A
sciq
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What is an example of humans building houses in a ecosystem and causing change in the environment as a result? A. a dog house is placed in a fenced in back yard B. a birdbath is placed in a park...
C
openbookqa
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What is the term for animal-like protists that are usually single-celled? A. eukaryotes B. vertebrates C. larvae D. protozoa Answer:
D
sciq
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Tick the \textbf{true} assertion. MAC is \ldots A. \ldots a computer. B. \ldots the name of a dish with chili. C. \ldots a Message Authentication Code. D. \ldots the encryption of KEY with the C...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. If koalas are impacted by fire what happens? A. enormous damage to homes B. they will stay C. they fly away D. they will move to another area E. direct damage to the lungs F. they will burn G. a...
D
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. K-means can be equivalently written as the following Matrix Factorization $$ \begin{aligned} & \min _{\mathbf{z}, \boldsymbol{\mu}} \mathcal{L}(\mathbf{z}, \boldsymbol{\mu})=\left\|\mathbf{X}-\m...
A
m1_preference
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Only finished mrnas are exported from the nucleus to what? A. cytoplasm B. amino acids C. cerebellum D. electron Answer:
A
sciq
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. Marmots in what will be protected from wild fires? A. underground burrows B. looseness of dirt or compost C. one celled organisms D. above ground pools E. grassy fields F. an external framework ...
A
qasc
The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. what helps plants reproduce? A. gene flow B. insects C. Earthworms D. glycogen E. Wind F. mitosis G. seeds H. energy Answer:
B
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. What are small gnawing mammals such as rats and mice called? A. marsupials B. furries C. rodents D. miniatures Answer:
C
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The following are multiple choice questions (with answers) about knowledge and skills in advanced master-level STEM courses. A basic statement in RDF would be expressed in the relational data model by a table A. with one attribute B. with two attributes C. with three attributes D. cannot be expressed in the relational...
B
m1_preference