Given the code fragment: Boolean b1 = true; Boolean b2 = false; int 1 = 0; while (foo) {} Which one is valid as a replacement for foo?

The correct answer is D. "foo".equals("bar"). equals works fine on strings. equals produces a Boolean value. Incorrect answers: the compareTo method produces and int, not a boolean. i = 1 is an assignment, not a comparison. i == 2? -1:0 would produce the integer 0. A Boolean value is needed.

Using Loop Constructs

Question

Given the code fragment:

Boolean b1 = true; Boolean b2 = false; int 1 = 0; while (foo) {} Which one is valid as a replacement for foo?

Options

Ab1.compareTo(b2)
Bi = 1
Ci == 2? -1:0
D"foo".equals("bar")

How the community answered

(22 responses)

A
5% (1)
B
5% (1)
D
91% (20)

Explanation

equals works fine on strings. equals produces a Boolean value. Incorrect answers: the compareTo method produces and int, not a boolean. i = 1 is an assignment, not a comparison. i == 2? -1:0 would produce the integer 0. A Boolean value is needed.

Topics

#while loop#boolean expressions#operators

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