Question

Please answer the following questions for me <3 ;

If a machine instruction, e.g. JMP, can not specify a segment number then it is using

Select one:

a. explicit segments

b. segment offsets

c. code sharing

d. implicit segments

The primitive data types, double and long

Select one:

a. may or may not be the same size

b. will always be the same size

c. will never be the same size

d. long will always be bigger

Malloc is used to

Select one:

a. free memory to the heap

b. allocate memory from the stack

c. allocate memory from the heap

d. free memory to the stack

Answer 1

The primitive data types, double and long

Answer: b. will always be the same size

double and long double have the same size in some systems

But in others, long doubles are of greater size

• may or may not be the same size, will always be the same size, will never be the same size long will always be bigger are all invalid.

Malloc is used to

Answer: c. allocate memory from the heap

malloc is used to allocate a block of memory on the heap. The program accesses this block of memory via a pointer that malloc returns.

When the memory is no longer needed, the pointer is passed to free which deallocates the memory so that it can be used for other purposes.

Other memory allocation functions are

1. malloc()
2. calloc()
3. free()
4. realloc()

If you have any doubts, leave a comment below and I'll help you out.