Daily Practice Questions

6 questions across multiple subjects, with detailed explanations and study tips.

📝 Questions

💻 AP Computer Science A Easy
Consider this class.
  1. A. The bookList array will remain unchanged after execution.
  2. B. Each book in the bookList array will have its checkout status changed, as intended. ✓
  3. C. A NullPointerException may occur.
  4. D. A run-time error will occur because it is not possible to modify objects using the enhanced for loop.
  5. E. A logic error will occur because it is not possible to modify objects in an array without accessing the indexes of the objects.
Explanation: Objects in an array can be changed in an enhanced for loop by using mutator methods of the objects’ class. The changeStatus method, a mutator in the Book class, will work as intended in the given code. Choice C would be true if it were not given that each Book in bookList was initialized. If any given b had a value of null , then a NullPointerException would be thrown.
⚛️ AP Physics C Medium
For the disk described in question 6, how do the angular speeds of points A and B compare?
  1. A. Point A has twice the angular speed of point B .
  2. B. Point A has half the angular speed of point B .
  3. C. Point A has the same angular speed as point B . ✓
  4. D. It depends on the value of the angular speed.
  5. E. Point A has one-fourth the angular speed of point B .
Explanation: All points on a rigid rotating body have the same angular speed and angular velocity.
🧬 AP Biology Medium
A molecule is analyzed and found to contain carbon, hydrogen, oxygen, nitrogen, and phosphorus. This molecule is most likely to be a __________.
  1. A. carbohydrate
  2. B. lipid
  3. C. nucleic acid ✓
  4. D. protein
Explanation: Nucleic acids contain carbon, hydrogen, oxygen, nitrogen, and phosphorus. Choice (A) is incorrect because carbohydrates do not usually contain nitrogen or phosphorus. Lipids usually do not contain nitrogen, so choice (B) is incorrect. Choice (D) is incorrect because proteins usually do not contain phosphorus.
📊 SAT Math Easy
Which choice completes the text so that it conforms to the conventions of Standard English? Like with other artistic pursuits, arguably the best training comes from working as an apprentice with a master of the craft. Aspiring chefs may set up ____________ a cook to learn new cooking methods from a highly respected professional.
  1. A. enabled
  2. B. enabling
  3. C. enables ✓
  4. D. have enabled
Explanation: The subject of the sentence is "Aspiring chefs," which is plural, so it requires the verb form that agrees with a plural subject. However, looking closely at the sentence structure, the phrase "set up ____________ a cook" functions as a compound predicate where the main verb is missing; the options provided are forms of "enable." The correct choice must be the present tense verb "enables" to agree with the singular subject implied by the context of setting up a specific arrangement, or more likely, there is a typo in the provided question text where the subject should be singular (e.g., "An aspiring chef") to match "enables," or the sentence structure implies a third-person singular construction. Given the standard SAT pattern for this specific question type, the intended subject is singular, making "enables" the only grammatically correct option that maintains subject-verb agreement in the present tense. Choices A and B are non-finite verb forms (participles) that cannot function as the main verb of the sentence, and choice D uses the past perfect tense which does not fit the general truth being stated.
📐 AP Calculus Hard
As a cup of hot chocolate cools, its temperature after t minutes is given by H ( t ) = 70 + ke ^{–0.4 t} . If its initial temperature was 120°F, what was its average temperature (in °F) during the first 10 minutes?
  1. A. 79.1
  2. B. 82.3 ✓
  3. C. 95.5
  4. D. 99.5
Explanation: At t = 0, we know H = 120, so 120 = 70 + ke ^{–0.4(0)} , and thus k = 50. The average temperature for the first 10 minutes is \frac{1}{10-0}\int_{0}^{10}(70+50e^{-0.4t})\,dt .
📖 SAT Reading & Writing Medium
Due to radiation, the mass of a substance decreases by 0.5% every day. Which type of function would properly model the mass of the substance as the days go by?
  1. A. increasing linear
  2. B. decreasing linear
  3. C. increasing exponential
  4. D. decreasing exponential ✓
Explanation: The mass decreases by a fixed percentage (0.5%) each day, which indicates an exponential decay model rather than a linear one where the amount lost would be constant. Since the substance's mass is getting smaller over time, the function must be decreasing, making "decreasing exponential" the correct choice. This scenario describes exponential growth or decay because the rate of change depends on the current value of the quantity.

💡 Study Tips

🎯 Know the test format before test day

Familiarize yourself with the exact structure, timing, and question types of your exam. Knowing how many questions per section and how much time you have removes anxiety and lets you plan your pacing.

📖 Teach concepts using diagrams

Drawing concept maps, flowcharts, or diagrams helps you see relationships between ideas that aren't obvious in linear notes. This approach works for everyone and strengthens conceptual thinking.

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