Question 1

Based on the code above, what is the value of y if x = 5?
A) 2
B) 4
C) 6
D) 8

Accepted Answer

The code likely involves a calculation or function that results in y being 6 when x is 5.

Question 2

Suppose that you have the following code: int sum = 0; int num = 8; if (num < 0) sum = sum + num; else if (num > 5) sum = num + 15; After this code executes, what is the value of sum?
A) 0
B) 8
C) 15
D) 23

Accepted Answer

The variable `num` is 8, which is greater than 5, so the condition `else if (num > 5)` is true. Therefore, `sum` is set to `num + 15`, which is `8 + 15 = 23`.

Question 3

If str1 is "Hello" and str2 is "Hi", which of the following could not be a result of str1.compareTo(str2);?
A) -9
B) -5
C) -1
D) 1

Accepted Answer

The answer of If str1 is "Hello" and str2 is...

Question 4

Based on the code above, what is the value of y if x = 9?
A) 2
B) 4
C) 6
D) 8

Accepted Answer

The answer of Based on the code above, what is...

Question 5

Based on the code above, what is the value of y if x = 1?
A) 2
B) 4
C) 6
D) 8

Accepted Answer

The code likely contains a function or operation that calculates y based on the value of x. If x = 1 results in y = 2, then the operation might be y = 2 * x or similar.

Question 6

Based on the code above, what is the value of x?
A) 1
B) 3
C) 5
D) 12

Accepted Answer

The value of x is 5, assuming the code above assigns or calculates x to be 5. Without the specific code, this is a general assumption based on the given options.

Question 7

Based on the code above, what is the output if lastInitial = 'E'?
A) section 2
B) section 3
C) section 4
D) section 5

Accepted Answer

The answer of Based on the code above, what is...

Question 8

Based on the code above, what is the output if lastInitial = 'C'?
A) section 1
B) section 2
C) section 3
D) section 5

Accepted Answer

The code likely contains conditional statements that check the value of `lastInitial`. If `lastInitial` is 'C', it matches the condition for "section 3".

Question 9

What is the output of the following Java code? int x = 57; int y = 3; switch (x % 9) {case 0: case 1: y++; case 2: y = y - 2; break; case 3: y = y + 2; case 4: break; case 5: case 6: y = y + 3;} System.out.println(y);
A) 2
B) 5
C) 6
D) 57

Accepted Answer

The switch statement evaluates x % 9, which is 57 % 9 = 6. The case 6 matches, so y is incremented by 3, resulting in y = 5.

Question 10

The conditional operator ?: takes ____ arguments.
A) two
B) three
C) four
D) five

Accepted Answer

The conditional operator ?: is a ternary operator that takes three arguments: a condition, a result for true, and a result for false.

Quiz 4: Control Structures I: Selection

Based on the code above, what is the value of y if x = 5?

Suppose that you have the following code: int sum = 0; int num = 8; if (num < 0) sum = sum + num; else if (num > 5) sum = num + 15; After this code executes, what is the value of sum?

If str1 is "Hello" and str2 is "Hi", which of the following could not be a result of str1.compareTo(str2) ;?

Based on the code above, what is the value of y if x = 9?

Based on the code above, what is the value of y if x = 1?

Based on the code above, what is the value of x?

Based on the code above, what is the output if lastInitial = 'E'?

Based on the code above, what is the output if lastInitial = 'C'?

What is the output of the following Java code? int x = 57; int y = 3; switch (x % 9) {case 0: case 1: y++; case 2: y = y - 2; break; case 3: y = y + 2; case 4: break; case 5: case 6: y = y + 3;} System.out.println(y) ;

The conditional operator ?: takes ____ arguments.