C Programming · all questions

Standard Library Functions
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Q201

What is returned by the function if the space cannot be allocated by the function malloc(), realloc() and calloc()?

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Q202

The following C code results in an error. State whether true or false.

#include<stdio.h>
#include<time.h>
int main()
{
    struct tm *local;
    time_t t;
    t=time(NULL);
    local=asctime(localtime(&t));
    printf("%d",local->tm_wday);
    return 0;
}

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Q203

RAND_MAX macro is the maximum value returned by the rand function.

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Q204

What will be the output of the following C code?

char word[20 ] = "1.234555 WELCOME"; 
char *w; double dis; 
dis= strtod(word, &w); 
printf("The number is %lf\n", dis); 
printf("String  is |%s|", w);

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Q205

Which function returns the arc sine in the range [-pi/2, +pi/2] radians?

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Q206

If the result underflow, the function returns zero.

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Q207

Which of the following header file defines one function longjmp(), and one variable type jmp_buf?

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Q208

The mbstowcs() function is used to return the number of array elements modified, not including a terminating zero code, if any.

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Q209

longjmp() function is the only function defined under the header file setjmp.h?

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Q210

void assert(int expression) when the expression is evaluated to true?

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Q211

What will be the output of the following C code?

#include <stdio.h>
#include <limits.h>
int main() 
{
    printf("The minimum value of LONG = %lf\n", LONG_MIN);
    return 0;
}

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Q212

What is returned by the function localeconv()?

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Q213

What will be the output of the following C code if the system time is 4:27 PM?

#include<stdio.h>
#include<time.h>
int main()
{
    struct tm *ptr;
    time_t t;
    char str[100];
    t = time(NULL);
    ptr = localtime(&t);
    strftime(str,100,"%H %p %M minutes",ptr);
    puts(str);
    return 0;
}

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Q214

Which of the following functions returns a pointer to a string representing the date and time stored in a structure?

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Q215

Which macro retrieves the next argument in the parameter list of the function with type type?

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Q216

Which header file should be included if a function has to be defined such that it can accept variable number of arguments?

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Q217

The function computes the exponential function of x.

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Q218

The macro void assert(int expression) allows the diagnostic information to be written in which of the following files?

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Q219

If the result overflows, the function returns the value of the macro HUGE_VAL, carrying the same sign except for the . . . . . . . . function as the correct value of the function.

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Q220

Is this right explanation to the given code?

void *calloc(size_t n, size_t size) 
#n -- This is the number of elements to be allocated.
#size -- This is the size of elements.

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