Multiple choice technology

Consider the two statements: 1. boolean passingScore = false && grade == 70; 2. boolean passingScore = false & grade == 70;The expression grade == 70 is evaluated:

  1. in both 1 and 2

  2. in neither 1 nor 2

  3. in 1 but not 2

  4. invalid because false should be FALSE
Reveal answer Fill a bubble to check yourself
C Correct answer
AI explanation

To answer this question, you need to understand the difference between the logical AND operator (&&) and the bitwise AND operator (&).

In statement 1, the logical AND operator (&&) is used. The logical AND operator short-circuits the evaluation. This means that if the first operand is false, the second operand will not be evaluated because the overall result will already be false. In this case, if false is assigned to the variable passingScore, the expression grade == 70 will not be evaluated.

In statement 2, the bitwise AND operator (&) is used. The bitwise AND operator evaluates both operands, regardless of the value of the first operand. In this case, if false is assigned to the variable passingScore, the expression grade == 70 will still be evaluated.

Therefore, the expression grade == 70 is evaluated in statement 1 but not in statement 2.

The correct answer is C) in 1 but not 2.

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