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File Input Output- C Programming MCQ Questions and Answers

Learn competitive and Technical Aptitude C programming mcq questions and answers on File I/O with easy and logical explanations. Page-5 section-2

Each section contains 100 MCQs on File Input Output .
41
Which of the following macro extracts an argument from the variable argument list (ie ellipsis) and advance the pointer to the next argument?
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Answer & Solution
Answer: Option B
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42
calloc() initialize memory with all bits set to zero.
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Answer & Solution
Answer: Option A
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43
Which of the following snippet will effectively generate random numbers?
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Answer & Solution
Answer: Option A
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44
The statement prog < infile causes . . . . . . . .
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Answer & Solution
Answer: Option A
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45
What is the use of getchar()?
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Answer & Solution
Answer: Option C
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46
What will be the output of the following C code?
#include <stdio.h>
#include <stdarg.h>
int f(...);
int main()
{
    char c = 97;
    f(c);
    return 0;
}
int f(...)
{
    va_list li;
    char c = va_arg(li, char);
    printf("%c\n", c);
}
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Answer & Solution
Answer: Option A
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47
Which of the following data-types are promoted when used as a parameter for an ellipsis?
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Answer & Solution
Answer: Option A
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48
What is the value of EOF?
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Answer & Solution
Answer: Option A
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49
Which of these is a correct way to generate numbers between 0 to 1(inclusive) randomly?
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Answer & Solution
Answer: Option A
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50
log(x) function defined in math.h header file is . . . . . . . .
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Answer & Solution
Answer: Option A
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