C Programming · all questions

File Input Output
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Q101

What does the following C code snippet mean?

int ungetc(int c, FILE *stream)

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Q102

Which is the best way to generate numbers between 0 to 99?

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Q103

Which of the following is an invalid method for input?

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Q104

What error will be generated on using incorrect specifier for the datatype being read?

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Q105

In C language, FILE is of which data type?

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Q106

Which types of input are accepted in toupper(c)?

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Q107

Which among the following is correct function call for rand() and random()?

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Q108

what is the return value of fputs()?

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Q109

What will be the output of the following C code?

#include <stdio.h>
#include <stdarg.h>
int f(char c, ...);
int main()
{
    char c = 97, d = 98;
    f(c, d);
    return 0;
}
int f(char c, ...)
{
    va_list li;
    va_start(li, c);
    char d = va_arg(li, int);
    printf("%c\n", d);
    va_end(li);
}

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Q110

What will be the output of the following C statement?

int sscanf(char *string, char *format, arg1, arg2, ...)

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Q111

The syntax of fgets is char *fgets(char *line, int maxline, FILE *fp). Which is true for fgets?

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Q112

What does the following C code snippet mean?

char *gets(char *s)

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Q113

Which functions is declared in ?

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Q114

What does scanf() function return?

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Q115

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    FILE *fp = stdout;
    stderr = fp;
    fprintf(stderr, "%s", "hello");
}

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Q116

What is the use of symbol * in the control string as shown [=%[*][width] [modifiers] type=]?

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Q117

Which of the following function can be used to terminate the main function from another function safely?

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Q118

For a typical program, the input is taken using . . . . . . . .

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Q119

What is the return value of putchar()?

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Q120

What will be the output of the following C code?

#include <stdio.h>
int f(char chr, ...);
int main()
{
    char c = 97;
    f(c);
    return 0;
}
int f(char c, ...)
{
    printf("%c\n", c);
}

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