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Right option is (a) SYNCHRONOUS signal OCCURS because of the ACTION that your PROGRAM takes

The best explanation: Synchronous signal occurs because of the ACTIONS that your program takes.

The correct choice is (b) two times

Easiest explanation - SETJMP() macro returns twice. FIRST time, setjmp() returns ZERO on its DIRECT invocation. Second time macro returns when longjmp is called with the information written to the environment; now, it returns the VALUE passed to longjmp as second argument.

The CORRECT answer is (a) ULONG_MIN

Best EXPLANATION: The macro ULONG_MIN is not defined WHEREAS the macros LONG_MIN, ULONG_MAX and LONG_MAX are all defined in the header FILE limits.h.

Correct option is (c) SIGABRT

The best I can EXPLAIN: SIGABRT is the macro DEFINED under the header file signal.h which terminates the program ABRUPTLY.

Right OPTION is (b) LONGJMP

Explanation: longjmp() is the only function defined under the HEADER file SETJMP.h. What setjmp() does is save the contents of the registers so that longjmp() can restore the contents later.

The correct OPTION is (a) LC_TIME

For EXPLANATION: LC_TIME is the macro DEFINED under locale. h which affects the STRFTIME() function.

The CORRECT CHOICE is (a) size_t

Easiest explanation - offsetof EXPANDS to a constant of TYPE size_t. It retuns the offset of the FIELD member from the start to of the structure type.

Right option is (C) va_start(), va_arg() and va_end()

Best EXPLANATION: The header file stdarg.h has three MACROS defined in it. They are va_start(), va_arg() and va_end(). va_listis a VARIABLE TYPE that holds information needed by the three macros.

The CORRECT choice is (C) NDEBUG

For explanation: The header FILE defines the assert MACRO and refers to another macro, NDEBUG which is not DEFINED by .

The correct option is (d) strtod()

EASY explanation - The function ATOI() and ATOL() are similar to strtol(), atof() is similar to strtod() except that errono is not necessarily set on CONVERSION error.

Right option is (c) compar()

To EXPLAIN: void *bsearch(CONST void *key, const void *base, size_t nitems, size_t size, int (*compar)(const void *, const void *))

The COMPARISON function POINTED to by compar() is called with two arguments that point to the key object to be searched and to an array element, in that order. The function shall return a < 0, = 0, or > 0 if the key object is CONSIDERED, respectively, to be less than, to match, or to be greater than the array element.

Right option is (B) atoi()

The best explanation: int atoi(const CHAR *str); The C library FUNCTION int atoi(const char *str) converts the STRING argument str to an integer (type int).

Correct ANSWER is (b) frexp()

For EXPLANATION: The frexp() function breaks a floating-point number into a normalized fraction and an INTEGRAL power of 2.

Correct ANSWER is (a) TYPE va_arg(va_list ap, type)

The best I can explain: type va_arg(va_list ap,type)

This macro is used to retrieve the next argument in the parameter list of the FUNCTION with type type.

Correct answer is (c) mblen()

To explain I would say: int mblen(const char *s, size-t n);

If s is not a NULL pointer, the mblen() FUNCTION is USED to determine the number of BYTES contained in the multibyte character POINTED to by s.

Correct option is (b) wchar_t

Explanation: wchar_t

This is an INTEGER type of the SIZE of a WIDE CHARACTER CONSTANT defined under the header stdlib.h .

Right option is (d) no

To EXPLAIN: No VALUE is returned by the MACRO assert.

Correct option is (c) calloc,MALLOC,realloc

To explain I would SAY: The free() function causes the space to be deallocated that are pointed to by ptr, that is, made AVAILABLE for further allocation. No action occurs if ptr is a null pointer. Otherwise, if the ARGUMENT does not match a pointer EARLIER returned by the calloc. malloc, or realloc function.

Right option is (B) ldiv_t

To explain: ldiv_t isthe structure returned by the function DIV(). ldiv() function is similar to the function div() EXCEPT that the argument and the returned VALUE is of type long int.

Right OPTION is (b) macro, function

Explanation: assert shall be implemented as a macro and not a function, which is used to ADD DIAGNOSTICS information in your C PROGRAM. The behavior is undefined if the macro definition is suppressed to access an actual function.

The correct ANSWER is (a) This is the value for the exit function to return in case of failure

Easy explanation - The macros DEFINED is EXIT-FAILURE which expand to INTEGRAL expressions that may be used as the argument to the exit function to return unsuccessful.

Correct choice is (b) RANGE ERROR

The best explanation: The sinh() function computes the hyperbolic sine of X. A range error occurs if the magnitude of x is too large.If the RESULT OVERFLOWS i.e the magnitude of the result is too large to be represented in an object of the specified type).

The correct OPTION is (d) va_start

The best explanation: va_start macro SHALL be invoked before any ACCESS to the unnamed arguments.void va-start (va-list AP, p); The va-start macro initializes ap for subsequent USE by va-arg and va-end.

Right OPTION is (a) STANDARD error file

Best explanation: The macro assert prints diagnostic information on the standard error file(stderr). The assert macro WRITES the information about the particular call that failed (including the text of the argument, name of the SOURCE file and the source line NUMBER) on the standard error file in an implementation-defined format.

The CORRECT answer is (a) true

Explanation: The pow() FUNCTION computes x raised to the power y. A domain error OCCURS if x is NEGATIVE and y is not an integral value. A domain error occurs if the result cannot be represented when x is zero and y is less than or equal to zero. A RANGE error may occur.

Correct OPTION is (a) va_list

Best explanation: The variable type declared under the HEADER file stdarg.h is va_list. This HOLDS information REQUIRED by three MACROS.

Right option is (d) wctomb()

Explanation: wctomb() is a C Library FUNCTION which CONVERTS the wide character into its multibyte representation. It is stored at the beginning of the character array POINTED to by the respective pointer.

Correct answer is (c) CHANGES the size of the object pointed to by STR to the size SPECIFIED by size

The explanation: void *REALLOC(void *str, size-t size);

The realloc() function is used to change the size of the object which is pointed to by str to the size specified by size.

Correct choice is (B) va_start, va_end and va_arg

Explanation: va_start macro must be CALLED before using macros va_end and va_arg.

The macro VOID va_start(va_list p, last_arg) initializes p variable to be USED with the va_arg and va_end macros.

The correct choice is (d) qsort()

The explanation: void qsort(void *base, size_t nmemb, size_t size, int (*COMPAR)(const void *, const void*))

The qsort() function is used to SORT an array of nmemb objects, the initial ELEMENT of array is pointed to by base. The size of each object in array is specified by size. The contents of the array are sorted into ascending order ACCORDING to a comparison function pointed to by compar.

Correct CHOICE is (C) assert returns NOTHING

Easiest explanation - VOID assert(int expression), expression can be a variable or any C expression. If the expression EVALUATES to TRUE, assert() does nothing.

Correct option is (a) wcstombs()

The best I can EXPLAIN: The C LIBRARY function size_t wcstombs(char *ptr, const wchar_t *ws, size_t N)is used to convert the wide-character string was to a multibyte string starting at ptr. At most n bytes are WRITTEN to ptr.

The correct option is (c) free()

Easiest explanation - The calloc() FUNCTION is used to return EITHER a null POINTER or a pointer to the allocated space. The malloc() function is used to return either a null pointer or a pointer to the allocated space. The realloc() function is used to return either a null pointer or a pointer to the possibly moved allocated space. The free() function returns no value.

Right OPTION is (d) srand()

EXPLANATION: void srand(unsigned int seed);

The srand() function uses argument as a seed for a new SEQUENCE of pseudo-random numbers to be RETURNED by subsequent calls to rand(). The srand() function RETURNS no value.

The correct option is (a) true

Explanation: VOID *calloc(size-t N, size-t size);

This FUNCTION is used to allocate the REQUESTED memory and returns a pointer to it.

Correct choice is (d) TAN

The explanation: If the result overflows i.e the magnitude of the result is too large to be REPRESENTED in an object of the specified type, the function returns the value of the macro HUGE_VAL, with the same SIGN EXCEPT for the tan function as the correct value of the function.

Correct option is (a) DOMAIN ERROR

Explanation: A domain error occurs if an input argument is OUTSIDE the domain over which the MATHEMATICAL function is defined.

Right option is (a) floating POINT numbers

The best I can EXPLAIN: HUGE_VAL macro is USED when the result of a FUNCTION may not be REPRESENTABLE as a floating point number.

The correct answer is (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

Easiest explanation - long int labs(long int i);

The abs() function is similar to the labs() function, except that the returned value and argument each are of type long int.