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Standard Library Functions - C Programming MCQ Questions and Answers

Learn competitive and Technical Aptitude C programming mcq questions and answers on Standard Library Functions with easy and logical explanations. Page-3 section-3

Each section contains 100 MCQs on Standard Library Functions .
21
Some types and macros defined under the header file stddef.h may be defined under other header files too.
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Answer & Solution
Answer: Option A
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22
What will be the output of the following C code?
int main(void)
{
    int rc;
    rc = system("time");
    exit(0);
}
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Answer & Solution
Answer: Option C
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23
Which of the following statement is correct?
double x, y, z;
x = 5.123456;
z= modf(x, *y);
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Answer & Solution
Answer: Option A
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24
sqrt(x) function is not faster than the apparent equivalent pow(x,0.5).
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Answer & Solution
Answer: Option B
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25
Initial seed is . . . . . . . . for the function srand(unsigned int seed).
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Answer & Solution
Answer: Option B
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26
The value of tm_isdst is . . . . . . . . when DST( Daylight Savings Time) is in effect, . . . . . . . . when DST is not in effect and . . . . . . . . when the DST status is unknown.
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Answer & Solution
Answer: Option B
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27
The behavior is undefined if more than one call to the exit function is executed by a program.
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Answer & Solution
Answer: Option A
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28
What is the function of the given longjump(jmp_buf buf, i)?
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Answer & Solution
Answer: Option A
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29
Which of the given function is a library function under the header math.h?
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Answer & Solution
Answer: Option A
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30
Which header file is used to define data formats and currency symbols?
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Answer & Solution
Answer: Option B
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