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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-8 section-1

Each section contains 100 MCQs on File Input Output .
71
Which among the following is the odd one out?
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Answer & Solution
Answer: Option D
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72
The syntax of the scanf() is scanf("control string ", arg1,arg2,arg3,....,argn); the prototype of control string is
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Answer & Solution
Answer: Option A
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73
Output justification such as decimal point, numerical sign, trailing zeros or octal are specified.
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Answer: Option B
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74
function fabs defined math.h header file takes the argument of type integer.
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Answer: Option B
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75
What will be the output of the following C code considering user typed jkl?
#include <stdio.h>
int main()
{
    char n[20];
    fgets(n, 19, stdin);
    ungetc(n[0], stdin);
    printf("%s\n", n);
    return 0;
}
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Answer & Solution
Answer: Option A
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76
Which of the following is NOT a delimiter for an input in scanf?
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Answer: Option D
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77
Which is true about isupper(c), where c is an int that can be represented as an unsigned?
char or EOF.isupper(c) returns
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Answer: Option D
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78
What will be the output of the following C code?
#include <stdio.h>
#include <math.h>
void main()
{
    int k = fabs(-87);
    printf("%d\n", k);
}
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Answer & Solution
Answer: Option B
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79
gets() function checks overflow run.
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Answer: Option B
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80
In linux, apart from including math header file, the program is successfully executed by which of the following?
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Answer: Option D
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