STATS 108-A

"General Utilities - 3"

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6. 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

7. The behavior is undefined if more than one call to the exit function is executed by a program.

a) true

b) false

8. Which function searches an environmenr list that are provided by the host environment?

a) getenv()

b) system()

c) srand()

d) rand()

9. The system() function passes the string pointed to by string to the host environment to be executed by a command processor in an implementation-defined manner.

int system(const char *string); 

a) true

b) false

10. What will be the output of the following C code?

int main(void) { int rc; rc = system("time"); exit(0); } 

a) produces error

b) no value is returned

c) returns the time

d) nothing can be said

1. void free(void *ptr) deallocates the memory previously allocated by a call to _______ ________ or _________

a) malloc,getenv,abort

b) calloc,malloc,exit

c) calloc,malloc,realloc

d) exit,getenv,abort

2. The ________ function returns no value.

a) malloc()

b) realloc()

c) free()

d) calloc()

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

a) value

b) error

c) null pointer

d) no value

4. What is the function of the void *realloc(void *str, size-t size);?

a) allocates space for an array of str objects, each of whose size is size

b) allocates space for an object whose size is specified by size and whose value is indeterminate

c) changes the size of the object pointed to by str to the size specified by size

d) causes the space pointed to by str to be deallocated, that is, made available for further allocation

5. Which among the given function causes abnormal program termination ?

a) exit()

b) abort()

c) atexit()

d) getenv()