Question

Characterize each of the following in terms of Name, Address, Value, Type, Lifetime, and Scope.

-Memory allocated on the heap in C

-C static character variable

-C global floating point variable

Answer 1

Answer:

1. Memory allocated on the heap in C:

Name: Any identifier

Address: Dynamic storage (large pool of memory, not allocated in contiguous order).

Value: Value to the variables are allocated and freed using functions like malloc() and free()

Type: pointer type

Lifetime:  The lifetime of a dynamic object begins when memory is allocated for the object (e.g., by a call to malloc()) and ends when memory is deallocated (e.g., by a call to free()).

Scope: Global scope

2. C static character variable:

Name: Any identifier

Address: Takes 1 byte

Value: Variables declared static are initialized to zero (or for pointers, NULL) by default.

Type: Any local or global variable can be made static depending upon what the logic expects out of that variable.

Lifetime: Its lifetime is the entire duration of the program's execution.

Scope: local to the block in which the variable is defined.

3. C global floating point variable:

Name: Any identifier

Address: Takes 4 bytes in memory(allocated in contiguous order).

Value: Variables are initialized to zero (or for pointers, NULL) by default.

Type:  It is used to store decimal numbers (numbers with floating point value) with single precision.

Lifetime: Global variables hold their values throughout the lifetime of your program and they can be accessed inside any of the functions defined for the program.

Scope: The scope of global variables will be throughout the program.

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