Midterm APCSP: Questions 1-2

Front

Selection is best defined as:

Back

Determining whether or not a part of a program should run

Front

Which of the following logical operators return true if both of its operands are true? NOT, NOR, OR, AND

Back

AND

Front

What is the result of the expression 3 > 0 OR 3 < 0?

Back

True

Front

What are all of the possible outputs of RANDOM(2, 5)?

Back

2, 3, 4, or 5

Front

Consider the pseudocode shown in the diagram: result ← false; IF (X AND Y) THEN { IF (Z) THEN { result ← false } ELSE { result ← true } }. Which single expression assigned to result is equivalent to this block?

Back

result ← (X AND Y) AND NOT(Z)

Front

A program generates value ← RANDOM(1, 100). It displays RED when value > 50. Otherwise, it displays GREEN if value ≤ X; else it displays BLUE. To simulate a spinner landing RED 50%, GREEN 25%, BLUE 25%, what should X be?

Back

25

Front

Which pseudocode block correctly performs: add 5 to x, then multiply the result by 3? Consider the three blocks shown: I) x ← 3 ∗ (x + 5), II) x ← x + 5 ∗ 3, III) x ← x + 5; x ← x ∗ 3.

Back

Blocks I and III match the described operation

Front

Consider the code segment: first ← 20; second ← 4; second ← first / second + 5 * 2. What is the value of second after the code is executed?

Back

15

Front

Consider the following code segment.
X ← 50
Y ← X + 10
Z ← X MOD 11
DISPLAY(X + Y + Z)
What is displayed after the code segment is executed?

Back

104

Front

Refer to the block-based program shown: it prompts for an integer, then checks num == 1. Inside that branch it checks num == 1 again and displays “positive”, otherwise it displays “zero”. Otherwise, it displays “negative”. What is printed when the program runs and the user enters 0?

Back

negative