Standard Library Functions - C Programming MCQ Questions and Answers

91

What are the contents of the register?

A) sp, fp only B) sp only C) fp, pc only D) sp, fp, pc

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Answer & Solution

Answer: Option D

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92

The header file setjmp.h is used to . . . . . . . .

A) set location specific information B) control low-level calls and returns to and from functions C) handle signals reported during a program's execution D) manipulate strings (character arrays)

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Answer & Solution

Answer: Option B

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93

Name the function that breaks a floating-point number into a normalized fraction and an integral power of 2.

A) exp() B) frexp() C) Idexp() D) modf()

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Answer: Option B

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94

Select the correct declaration of setjmp().

A) int setjmp(jmp_buf environment) B) int setjmp(long_jmp environment) C) int setjmp(jmp_buf ) D) int setjmp(long_jmp)

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Answer: Option A

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95

What will be the output of the following C code if the system date is 6/2/2017(Friday)?

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

A) 6 B) 5 C) error D) 0

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Answer & Solution

Answer: Option B

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96

A function is declared as sqrt(-x) under the header file math.h, what will the function return?

A) square root of x B) complex number C) domain error D) range error

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Answer: Option C

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97

void (*signal(int sig, void (*func)(int)))(int);If the value of func is SIG_IGN then . . . . . . . .

A) the signal will be ignored B) default handling for that signal will occur C) The signal() function will fail to execute D) the signal will be ignored to execute

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Answer & Solution

Answer: Option A

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98

Which macro saves the current environment into the variable environment for later use by the function longjmp().

A) setjmp B) longjmp C) jmp D) set_jmp

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Answer & Solution

Answer: Option A

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99

double . . . . . . . . (double x, double y) computes the floating-point remainder of x/y.

A) modf B) fmod C) ceil D) floor

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Answer & Solution

Answer: Option B

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100

Which statement is true regarding abs() and labs()?

A) The abs() function is similar to the labs() function, except that the argument and the returned value each of them have type long int B) The abs() function is not similar to the labs() function, except that the argument and the returned value in both functions have type long int C) The abs() function is similar to the labs() function, except that the argument and the returned value each have type short int D) The abs() function is not similar to the labs() function, except that the argument and the returned value in both function have type short int

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Answer & Solution

Answer: Option A

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