MCQOPTIONS
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MCQOPTIONS
This section includes 88 Mcqs, each offering curated multiple-choice questions to sharpen your Library Functions knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Select the macro that affects the information provided by localeconv function. |
| A. | LC_ALL |
| B. | LC_COLLATE |
| C. | LC_NUMERIC |
| D. | LC_CTYPE |
| Answer» D. LC_CTYPE | |
| 2. |
What error occurs if an input argument is outside the domain over which the mathematical function is de ned? |
| A. | domain error |
| B. | range error |
| C. | no error |
| D. | domain and range error |
| Answer» B. range error | |
| 3. |
Which of the following library functions returns the time in UTC (Greenwich mean time) format? |
| A. | localtime() |
| B. | gettime() |
| C. | gmtime() |
| D. | settime() |
| Answer» D. settime() | |
| 4. |
The _______ macro shall be invoked before any access to the unnamed arguments. |
| A. | va_arg |
| B. | va_end |
| C. | va_list |
| D. | va_start |
| Answer» E. | |
| 5. |
How many macros are defined in the header file stdarg.h? |
| A. | one |
| B. | two |
| C. | three |
| D. | four |
| Answer» D. four | |
| 6. |
In the c library function void (*signal(int sig, void (*func)(int)))(int), which statement is true with respect to func? |
| A. | func is a pointer to the function |
| B. | func is pointer to sig |
| C. | func is a static variable |
| D. | func is a pointer that points to all type of data |
| Answer» B. func is pointer to sig | |
| 7. |
Which function returns a pseudo-random integer? |
| A. | srand() |
| B. | rand() |
| C. | malloc() |
| D. | alloc() |
| Answer» C. malloc() | |
| 8. |
Choose the right declaration of longjmp() function. |
| A. | void longjmp(jmp_buf environment, int value) |
| B. | void longjmp(setjmp environment, int value) |
| C. | void longjmp(int value, jmp_buf environment) |
| D. | void longjmp(int value, setjmp environment) |
| Answer» B. void longjmp(setjmp environment, int value) | |
| 9. |
The _______ function sorts an array of objects |
| A. | bsort() |
| B. | hsort() |
| C. | ssort() |
| D. | qsort() |
| Answer» E. | |
| 10. |
The macros defined under the header file limits.h are not defined under any other header file. |
| A. | False |
| B. | True |
| Answer» C. | |
| 11. |
What does raise functions declared in signal.h do? |
| A. | reports a synchronous signal |
| B. | let's you specify handling of signals |
| C. | reports a asynchronous signal |
| D. | doesn't let you specify handling of signals |
| Answer» B. let's you specify handling of signals | |
| 12. |
Which function will return the quotient and remainder on division of numerator with denominator? |
| A. | div() |
| B. | div_t() |
| C. | ldiv_t() |
| D. | labs() |
| Answer» B. div_t() | |
| 13. |
Which macro is used in the setlocale() function? |
| A. | LC_SET |
| B. | FLT_RADIX 2 |
| C. | LC_MESSAGES |
| D. | SHRT_MAX |
| Answer» D. SHRT_MAX | |
| 14. |
The macro MB_LEN_MAX is used to find _________ |
| A. | Maximum number of bytes in a multi-byte character |
| B. | Whether the given function is valid or not |
| C. | The maximum time taken for the execution of a particular function |
| D. | Maximum number of bits in a multi-byte character |
| Answer» B. Whether the given function is valid or not | |
| 15. |
A type whose alignment requirement is at least as large as that of every data type: |
| A. | |
| B. | B. |
| C. | C. |
| D. | D. |
| Answer» E. | |
| 16. |
The macro definition of INT_MIN is ____________ |
| A. | -INT_MAX 1 |
| B. | INT_MAX 1 |
| C. | -INT_MAX + 1 |
| D. | INT_MAX + 1 |
| Answer» B. INT_MAX 1 | |
| 17. |
Which of the following functions returns a pointer to a string representing the date and time stored in a structure? |
| A. | ctime() |
| B. | time() |
| C. | asctime() |
| D. | localtime() |
| Answer» D. localtime() | |
| 18. |
Which function is used to recombine the fraction and exponent parts of a floating-point value after you have worked on them separately? |
| A. | frexp() |
| B. | exp() |
| C. | modf() |
| D. | Idexp() |
| Answer» E. | |
| 19. |
Which of the following library functions is used to read location dependent information? |
| A. | localtime() |
| B. | B. |
| C. | C. |
| D. | D. |
| Answer» C. C. | |
| 20. |
HUGE_VAL macro is used when the output of the function may not be ___________ |
| A. | floating point numbers |
| B. | integer number |
| C. | short int |
| D. | long int |
| Answer» B. integer number | |
| 21. |
Which macro can be used to detect and report exceptional conditions? |
| A. | extern |
| B. | edom |
| C. | assert |
| D. | lbdl_min 1e-37 |
| Answer» D. lbdl_min 1e-37 | |
| 22. |
The number of bytes contained in the multibyte character pointed to by a character is ___________ |
| A. | getenv() |
| B. | bsearch() |
| C. | mblen() |
| D. | qsort() |
| Answer» D. qsort() | |
| 23. |
The assert macro returns__________value. |
| A. | integer |
| B. | float |
| C. | double |
| D. | no |
| Answer» E. | |
| 24. |
Which of the given function differs from the statement'errno is not neccessarily set on conversion error'? |
| A. | atof() |
| B. | atoi() |
| C. | atol() |
| D. | strtod() |
| Answer» E. | |
| 25. |
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. |
| A. | sin |
| B. | cos |
| C. | cosec |
| D. | tan |
| Answer» E. | |
| 26. |
The macro which is used to find the maximum value of an unsigned integer is _________ |
| A. | UNINT_MAX |
| B. | UNSINT_MAX |
| C. | UINT_MAX |
| D. | UNIT_MAX |
| Answer» D. UNIT_MAX | |
| 27. |
What is returned by the function localeconv()? |
| A. | current location value |
| B. | past location value |
| C. | pointer to the last location |
| D. | pointer to the current location |
| Answer» E. | |
| 28. |
If the result underflow, the function returns zero. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 29. |
sqrt(x) function is not faster than the apparent equivalent pow(x,0.5). |
| A. | true |
| B. | false |
| Answer» C. | |
| 30. |
Which of the given option is declared under the header file stdlib.h? |
| A. | SEEK_CUR |
| B. | SEEK_END |
| C. | CLOCKS_PER_SEC |
| D. | EXIT_SUCCESS |
| Answer» E. | |
| 31. |
void free(void *p) performs which of the following functions? |
| A. | returns pointer to allocated space for existing contents of p |
| B. | de-allocates space to which p points |
| C. | to abnormally terminate the program |
| D. | no such function defined in stdlib.h |
| Answer» C. to abnormally terminate the program | |
| 32. |
Which statement is true with respect to RAND_MAX? |
| A. | specifies value for status argument to exit indicating failure |
| B. | specifies value for status argument to exit indicating success |
| C. | specifies maximum value returned by rand() |
| D. | specifies maximum value returned by srand() |
| Answer» D. specifies maximum value returned by srand() | |
| 33. |
Initial seed is ________ for the function srand(unsigned int seed). |
| A. | 1 |
| B. | 00 |
| C. | 01 |
| Answer» C. 01 | |
| 34. |
What will the following C code do on compilation? void main () { char com[50]; strcpy( com, "dir" ); system(com); } |
| A. | error |
| B. | lists down all the files and directories in the current directory under windows machine |
| C. | terminates the calling process immediately |
| D. | calls specified function and terminates it at the end of the program |
| Answer» C. terminates the calling process immediately | |
| 35. |
Point out the error in the following program. #include int main() { fprintf("IndiaBIX"); printf("%.ef", 2.0); return 0; } |
| A. | Error: unknown value in printf() statement. |
| B. | Error: in fprintf() statement. |
| C. | No error and prints "IndiaBIX" |
| D. | No error and prints "2.0" |
| Answer» C. No error and prints "IndiaBIX" | |
| 36. |
Point out the error in the following program. #include #include int main() { char str1[] = "Learn through IndiaBIX 0.com", str2[120]; char *p; p = (char*) memccpy(str2, str1, 'i', strlen(str1)); *p = ' 0'; printf("%s", str2); return 0; } |
| A. | Error: in memccpy statement |
| B. | Error: invalid pointer conversion |
| C. | Error: invalid variable declaration |
| D. | No error and prints "Learn through Indi" |
| Answer» E. | |
| 37. |
Can you use the fprintf() to display the output on the screen? |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 38. |
What is the purpose of fflush() function. |
| A. | flushes all streams and specified streams. |
| B. | flushes only specified stream. |
| C. | flushes input/output buffer. |
| D. | flushes file buffer. |
| Answer» B. flushes only specified stream. | |
| 39. |
Does there any function exist to convert the int or float to a string? |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 40. |
What will be the output of the program? #include int main() { int i; i = printf("How r u n"); i = printf("%d n", i); printf("%d n", i); return 0; } |
| A. | How r u 7 2 |
| B. | How r u 8 2 |
| C. | How r u 1 1 |
| D. | Error: cannot assign printf to variable |
| Answer» C. How r u 1 1 | |
| 41. |
What will the function randomize() do in Turbo C under DOS? |
| A. | returns a random number |
| B. | returns a random number generator in the specified range |
| C. | returns a random number generator with a random value based on time |
| D. | return a random number with a given seed value |
| Answer» D. return a random number with a given seed value | |
| 42. |
Which of the given statement is true with respect to the function atexit()? |
| A. | The atexit() function cannot return to its caller |
| B. | The atexit() function is used to return zero if the registration succeeds, nonzero if it fails |
| C. | The atexit() function returns no value |
| D. | The atexit() function causes abnormal program termination to occur |
| Answer» C. The atexit() function returns no value | |
| 43. |
size_t is of ______________ type. |
| A. | signed integer |
| B. | signed character |
| C. | unsigned integer |
| D. | unsigned character |
| Answer» D. unsigned character | |
| 44. |
Which of the following macros is defined under the header limits.h? |
| A. | FLT_ROUNDS |
| B. | USHRT_MAX |
| C. | DBL_MAX |
| D. | DECIMAL_DIG |
| Answer» C. DBL_MAX | |
| 45. |
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. | |
| C. | C. |
| D. | D. |
| Answer» B. | |
| 46. |
A non-zero value is returned, if setjmp() returns from a longjmp() function call. |
| A. | false |
| B. | true |
| Answer» C. | |
| 47. |
Which of the given options is an array type used for holding information? |
| A. | longjmp |
| B. | setjmp |
| C. | jmp_buf |
| D. | no such variable |
| Answer» D. no such variable | |
| 48. |
Which of the following macros is not defined? |
| A. | ULONG_MIN |
| B. | LONG_MIN |
| C. | ULONG_MAX |
| D. | LONG_MAX |
| Answer» B. LONG_MIN | |
| 49. |
Point out the error in the following program. #include int main() { fprintf("Compscibits"); printf("%.ef", 2.0); return 0; } |
| A. | Error: unknown value in printf() statement |
| B. | Error: in fprintf() statement |
| C. | No error and prints "Compscibits" |
| D. | No error and prints "2.0" |
| Answer» C. No error and prints "Compscibits" | |
| 50. |
_______variable type defined in the header stdlib.h is an integer type of the size of a wide character constant. |
| A. | size_t |
| B. | wchar_t |
| C. | div_t |
| D. | ldiv_t |
| Answer» C. div_t | |