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Mixed Deck — All AMCAT Topics Flashcards

100 cards from real AMCAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Choose the word closest in meaning to 'AMELIORATE'.

    Answer: Improve

    Ameliorate means to make something bad or unsatisfactory better; to improve.

  2. Which word is a SYNONYM of TENACIOUS?

    Answer: Persistent

    Tenacious means holding firmly to something and not giving up, making 'persistent' its synonym.

  3. A merchant marks his goods 30% above cost and allows a 10% discount. His profit percentage is:

    Answer: 17%

    Let CP=100. MP=130. SP=130×0.9=117. Profit=17%.

  4. Choose the ANTONYM of SERENE.

    Answer: Agitated

    Serene means calm and peaceful; its antonym is agitated, meaning troubled or disturbed.

  5. What is the time complexity for inserting an element at the beginning of a dynamic array (ArrayList)?

    Answer: O(n)

    Inserting at the beginning requires shifting all existing elements one position to the right, which is O(n).

  6. Choose the ANTONYM of OSTENTATIOUS.

    Answer: Modest

    Ostentatious means designed to impress or attract notice; its antonym is modest, meaning unassuming.

  7. In Java, when you call an overridden method through a base-class reference, which method is executed?

    Answer: Derived class method

    Java uses dynamic dispatch — the actual object type determines which method runs at runtime.

  8. If log₂(32) = x, what is the value of x?

    Answer: 5

    2^x = 32 = 2^5, so x = 5.

  9. What is the maximum number of elements that can be stored in a 2D array declared as int a[4][5]?

    Answer: 20

    A 2D array of dimensions 4×5 holds 4*5 = 20 elements.

  10. The quantum theory was once viewed as irrational, unnatural, and __________ with common sense.

    Answer: incompatible

    "Incompatible" means unable to exist or be used together, or inconsistent with something else. If quantum theory was viewed as irrational and unnatural, it would naturally be seen as inconsistent or "incompatible" with common sense. The other options do not convey this meaning of fundamental disagreement.

  11. Fill in the blank: The scientist's hypothesis was _____ by the experimental results, confirming her theory.

    Answer: corroborated

    Corroborated means confirmed or supported by evidence, which aligns with the experimental results confirming the theory.

  12. Dion and Jane can finish a job in 72 hours; Jane and Lisa in 120 hours; and Dion and Lisa in 90 hours. What time can Dion do it on his own?

    Answer: 120 hours

    Let D, J, and L be the time Dion, Jane, and Lisa take individually. Their combined work rates are 1/D + 1/J = 1/72, 1/J + 1/L = 1/120, and 1/D + 1/L = 1/90. Adding these equations gives 2(1/D + 1/J + 1/L) = 1/72 + 1/120 + 1/90 = 5/360 + 3/360 + 4/360 = 12/360 = 1/30. Therefore, the combined rate of all three is 1/D + 1/J + 1/L = 1/60. To find Dion's rate, subtract Jane and Lisa's combined rate: 1/D = 1/60 - 1/120 = 2/120 - 1/120 = 1/120. Thus, Dion can do the job alone in 120 hours.

  13. Which sentence uses the subjunctive mood correctly?

    Answer: If he were here, he would help.

    The subjunctive mood requires 'were' (not 'was') for hypothetical or contrary-to-fact conditions with 'if.'

  14. Team A scored 60, 70, 80 in three rounds. Team B scored 70, 65, 85. Which team has a higher total?

    Answer: Team B (220)

    Team A: 210. Team B: 220. Team B is higher.

  15. A circle has a circumference of 44 cm. What is its area? (Use π = 22/7)

    Answer: 154 cm²

    C = 2πr = 44, so r = 7; Area = πr² = (22/7) × 49 = 154 cm².

  16. Statements: 1. All smartphones are electronic devices. 2. Some electronic devices are manufactured in China. Conclusions: I. All smartphones are manufactured in China. II. Some smartphones may be manufactured in China.

    Answer: Only conclusion II follows

    The first statement establishes that smartphones are a subset of electronic devices. The second statement says that some (not necessarily all) electronic devices are made in China. We cannot definitively conclude that ALL smartphones are made in China because the group of electronic devices made in China might not overlap with the group of smartphones. However, it is a possibility that they do overlap, making conclusion II ('Some smartphones may be manufactured in China') a valid logical possibility. Conclusion I is a definite statement that cannot be proven from the premises.

  17. What is the broadcast address for the network 192.168.10.0/24?

    Answer: 192.168.10.255

    For a /24 network, the broadcast address is formed by setting all host bits to 1; for 192.168.10.0/24, that is 192.168.10.255.

  18. Choose the ANTONYM of FRUGAL.

    Answer: Extravagant

    Frugal means sparing in use of resources; its antonym is extravagant, meaning wastefully lavish.

  19. Two numbers are in the ratio 5:7. If their LCM is 140, what is their sum?

    Answer: 48

    Numbers = 5k and 7k; LCM = 35k = 140, so k = 4; numbers = 20 and 28; sum = 20 + 28 = 48.

  20. A bag contains 4 red, 5 blue, and 6 green balls. What is the probability of drawing a blue ball at random?

    Answer: 5/15

    Total balls = 15; P(blue) = 5/15 = 1/3.