static and dynamic memory allocation in c | C programming interview questions | wikitechy.com

A dynamic memory allocation uses functions such as malloc() or calloc() to get memory dynamically

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[hemamalinig]

Static Allocation means, that the memory for your variables is allocated when the program starts. The size is fixed when the program is created. It applies to global variables, file scope variables, and variables qualified with static defined inside functions.

Automatic memory allocation occurs for (non-static) variables defined inside functions, and is usually stored on the stack (though the C standard doesn't mandate that a stack is used). You do not have to reserve extra memory using them, but on the other hand, have also limited control over the lifetime of this memory. E.g: automatic variables in a function are only there until the function finishes.

void func() {
int i; /* `i` only exists during `func` */
}

Dynamic memory allocation is a bit different. You now control the exact size and the lifetime of these memory locations. If you don't free it, you'll run into memory leaks, which may cause your application to crash, since it, at some point cannot allocation more memory.

int* func() {
int* mem = malloc(1024);
return mem;
}

int* mem = func(); /* still accessible */

[geethachinnapaiyan]

Static memory allocation in general is the allocation of memory at compile time before the associated program is executed, unlike dynamic memory allocation

[music-patiencealwayspaysof]

Static memory allocation in general is the allocation of memory at compile time before the associated program is executed, unlike dynamic memory allocation or automatic memory allocation where memory is allocated as required at run time.

[vigneshjollyman]

X: m=malloc(5); m= NULL; 1: using dangling pointers Y: free(n); n->value=5; .... Commonly Asked C Programming Interview Questions.

[saranrajs]

Dynamic Storage Allocation. CS 414: Operating Systems. Fall 2005. Presented By: Vibha Prasad. Memory Allocation. ◇ Static Allocation (fixed in size).

[monishamoni.]

Static memory is allocated at the start of your program. This includes all memory, that .... C/C++ permits you to declare static arrays only with fixed sizes. For example, the statement below allocates space for exactly 100 integers,

[kalieswaran]

SRAM, Punched Card and Tape are examples of Static Memory. Dynamic Memory: Dynamic Memory devices are semiconductor memories in which the stored ...

[ilakkiyameenu]

dynamic memory allocationrefers to performing manual memory management for dynamic memory allocation in the C programming language via a group of functions in the C standard library, namely malloc, realloc, calloc and free

[rebanbabu]

Static memory allocation in general is theallocation of memory at compile time before the associated program is executed, unlike dynamic memory allocation or automaticmemory required at run time.

[aswinchandarj]

C dynamic memory allocationrefers to performing manual memory management for dynamic memory allocation in the C programming language via a group of functions in the C standard library, namely malloc, realloc, calloc and free.

[samuelsam]

C Dynamic Memory Allocation: malloc(), calloc(), free() & realloc () The exact size of array is unknown untill the compile time, i.e., time when a compiler compiles code written in a ...

[monishamoni.]

In computer programming, a static variable is a variable that has been allocated statically so ... Static memory allocation in general is the allocation of memory at compile ... dynamic memory allocation or automatic memory allocation where memory is ... The static keyword is used in C and related languages both for static .

[s.imayabharathi]

C dynamic memory allocationrefers to performing manual memory management for dynamic memory allocation in the C programming language via a group of functions in the C standard library, namely malloc, realloc, calloc and free.

[aishusekar]

Interview Basics contain Interview English lessons on Commonly used Interview Questions and Answers

[vidhyatharan]

Static Memory the declared variable by the compiler....

[saranrajs]

Static Memory Allocation: Memory is allocated for the declared variable by the compiler....

[hemamalinig]

A dynamic memory allocation uses functions such as malloc() or calloc() to get memory dynamically

[saranrajs]

I would like to know what is the difference between static memory ... There are three types of allocation — static, automatic, and dynamic. Static ...

[samuelsam]

The concept of dynamic memory allocation in c language enables the C programmer to ... let's understand the difference memory allocation.

[aishusekar]

C language inherently does not has any technique to allocated memory dynamically but, there are 4 library functions