Programming in C MCQ - Master Assignment

41 Consider the following statement.
# define hypotenuse(a, b) sqrt (a * a + b * b ) ;
The macro-call hypotenuse ( a + 2, b + 3) ;

A
finds the hypotenuse of a triangle with sides a + 2 and b + 3
B
finds the square root of (a + 2)² + (b + 3)²
C
is invalid
D
finds the square root of 3 * a + 4 * b + 5

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Correct AnswerOption D

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The macro call will be expanded as
sqrt(a + 2 * a + 2 + b + 3 * b +3).
i.e, sqrt(3 * a + 4 * b + 5). Hence the answer.

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42 The ascending order of precedence of the bit-wise operators &, ^, | is

A
&, ^, |
B
^, &, I
C
|, ^, &
D
&, |, ^

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Correct AnswerOption C

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43 The scope of a macro definition

A
cannot be beyond the file in which it is defined
B
may be part of a file
C
is the entire program
D
excludes string of characters within double quotes

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Correct AnswerOption D

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44 lint is

A
a C compiler
B
an inter-active debugger
C
a C interpreter
D
a tool for analyzing a C program

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Correct AnswerOption D

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45 Which of the following comments are correct when macro definition includes arguments?

A
The opening parenthesis should immediately follow the macro name
B
There should be at least one blank between the macro name and the opening parenthesis
C
There should be only one blank between the macro name and the opening parenthesis
D
All the above comments are correct

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Correct AnswerOption A

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