Standard Library Functions — Part 2 MCQs with Explanations

#define assert(test) ((void)0) is the correct answer to “Which line from the given code is the passive form? #undef assert #ifdef NDEBUG #define assert (test) ( (void) 0) #else #define assert (test) #endif”. This question is standard in competitive examination syllabi for Standard Library Functions.

SHRT_MIN is the correct answer to “. . . . . . . . defines the minimum value for a short integer.”. This question is standard in competitive examination syllabi for Standard Library Functions.

atoi() is the correct answer to “The . . . . . . . . function converts the initial portion of the string pointed to by, to int representation.”. This question is standard in competitive examination syllabi for Standard Library Functions.

true is the correct answer to “The ldexp() function multiplies a floating-point number by an integral power of 2.”. This question is standard in competitive examination syllabi for Standard Library Functions.

false is the correct answer to “setjmp takes a jmp_buf type and different other type variables as input.”. This question is standard in competitive examination syllabi for Standard Library Functions.

mbtowc() is the correct answer to “What is the name of the function that is used to convert multibyte character to wide character”. This question is standard in competitive examination syllabi for Standard Library Functions.

assert is the correct answer to “The header file assert.h of the C Standard Library defines . . . . . . . . macro.”. This question is standard in competitive examination syllabi for Standard Library Functions.

size_t is the correct answer to “The macro offset expands to a constant of type . . . . . . . .”. This question is standard in competitive examination syllabi for Standard Library Functions.

true is the correct answer to “LC_COLLATE affects strcoll() and strxfrm() functions.”. This question is standard in competitive examination syllabi for Standard Library Functions.

1.00 is the correct answer to “What will be the output of the following C code? double x=1.8; printf("%.2lf",floor(x));”. This question is standard in competitive examination syllabi for Standard Library Functions.

exp_t is the correct answer to “Which of the following is not defined under the header file stddef.h”. This question is standard in competitive examination syllabi for Standard Library Functions.

localeconv() is the correct answer to “Which of the following library functions is used to read location dependent information”. This question is standard in competitive examination syllabi for Standard Library Functions.

cosh(x) is the correct answer to “The function computes the hyperbolic cosine of x.”. This question is standard in competitive examination syllabi for Standard Library Functions.

domain error is the correct answer to “What will be the output of the following C code? double log (double -x);”. This question is standard in competitive examination syllabi for Standard Library Functions.

current date, current time and the day of the week is the correct answer to “What will be the output of the following C code? (By date we mean: date, month and year) #include<stdio.h> #include<stdlib.h> #include<time.h> int main() { time_t ct; time(&ct); printf("%s\n",ctime(&ct)); }”. This question is standard in competitive examination syllabi for Standard Library Functions.

String value = 123546 , Float value = 123546.000000 is the correct answer to “What will be the output of the following C code? char str[20]; str= "123546"; res= atof(str); printf("String value = %s, Float value = %f\n", str, res);”. This question is standard in competitive examination syllabi for Standard Library Functions.

wctomb() is the correct answer to “The C library function . . . . . . . . function converts the wide character to its multibyte representation.”. This question is standard in competitive examination syllabi for Standard Library Functions.

true is the correct answer to “A domain error occurs if x is negative and y is not an integral value for the function pow(double x, double y).”. This question is standard in competitive examination syllabi for Standard Library Functions.

A pointer to the ?nal string is stored in the object pointed to by endptr, provided that endptr is not a null pointer is the correct answer to “Which statement is correct work reference to endptr? double strtod(const char *nptr, char **endptr);”. This question is standard in competitive examination syllabi for Standard Library Functions.

unsigned long int strtoul(const char *n, char **ptr, int base) is the correct answer to “Which of the following is the correct syntax of the function strtoul()”. This question is standard in competitive examination syllabi for Standard Library Functions.

coroutines is the correct answer to “A less common use of setjmp.h is to create syntax similar to . . . . . . . .”. This question is standard in competitive examination syllabi for Standard Library Functions.

2.0 is the correct answer to “What will be the output of the following C code? double x=1.2 printf("%.1lf", ceil(x));”. This question is standard in competitive examination syllabi for Standard Library Functions.

strtod() is the correct answer to “Which of the given function differs from the statement'errno is not neccessarily set on conversion error'”. This question is standard in competitive examination syllabi for Standard Library Functions.

Maximum number of bytes in a multi-byte character is the correct answer to “The macro MB_LEN_MAX is used to find . . . . . . . .”. This question is standard in competitive examination syllabi for Standard Library Functions.

abort() is the correct answer to “Which function is called by macro assert to terminate the execution”. This question is standard in competitive examination syllabi for Standard Library Functions.

Junk value is the correct answer to “What will be the output of the following C code, if the system date is 6/24/2017? #include<stdio.h> #include<stdlib.h> #include<time.h> int main() { time_t ct; time(&ct); printf("%s\n",(&ct)); }”. This question is standard in competitive examination syllabi for Standard Library Functions.

UINT_MAX is the correct answer to “The macro which is used to find the maximum value of an unsigned integer is . . . . . . . .”. This question is standard in competitive examination syllabi for Standard Library Functions.

env is the object containing information to restore the environment at the jmp_buf's calling point is the correct answer to “Which of the given statement is not true with respect to void longjmp( jmp-buf env, int val)”. This question is standard in competitive examination syllabi for Standard Library Functions.

de-allocates space to which p points is the correct answer to “void free(void *p) performs which of the following functions”. This question is standard in competitive examination syllabi for Standard Library Functions.

to a long integer is the correct answer to “atol(const char *str) Converts the string pointed to, by the argument str.”. This question is standard in competitive examination syllabi for Standard Library Functions.

three is the correct answer to “How many macros are defined in the header file stdarg.h”. This question is standard in competitive examination syllabi for Standard Library Functions.

first byte of multibyte character is the correct answer to “The pointer used in the mblen() function points to the . . . . . . . .”. This question is standard in competitive examination syllabi for Standard Library Functions.

allows a function with variable arguments which used the va_start macro to return is the correct answer to “What is the role of the given C function? void va_end(va_list ap)”. This question is standard in competitive examination syllabi for Standard Library Functions.

va_start is the correct answer to “The . . . . . . . . macro shall be invoked before any access to the unnamed arguments.”. This question is standard in competitive examination syllabi for Standard Library Functions.

#define NDEBUG #include is the correct answer to “Correct code to turn assertions OFF at various places throughout a source file is . . . . . . . .”. This question is standard in competitive examination syllabi for Standard Library Functions.

srand() is the correct answer to “Which among the given function does not return a value”. This question is standard in competitive examination syllabi for Standard Library Functions.

program starts program ends this is funccall is the correct answer to “What will the code display on compiling? void funccall() { printf("this is funccall\n"); } void main () { atexit(funccall); printf("program starts\n"); printf("program ends\n"); }”. This question is standard in competitive examination syllabi for Standard Library Functions.

01 is the correct answer to “What will be the output of the following C code if the system time is 1:52 PM (Sunday)? #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,"%I",ptr); puts(str); return 0; }”. This question is standard in competitive examination syllabi for Standard Library Functions.

-INT_MAX - 1 is the correct answer to “The macro definition of INT_MIN is . . . . . . . .”. This question is standard in competitive examination syllabi for Standard Library Functions.

null is the correct answer to “Which of the following is defined under the header file time.h”. This question is standard in competitive examination syllabi for Standard Library Functions.