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Quiz on Dynamic Memory Allocation in C

Quiz on Dynamic Memory Allocation in C

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Question 1 of 10

1. Question

What is dynamic memory allocation in C?

Allocating memory during compile time
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Allocating memory during runtime using pointers
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Allocating memory to variables only once
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Allocating memory in the header file
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Question 2 of 10

2. Question

Which header file is required for dynamic memory allocation functions?

#include
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#include
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#include
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#include
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Question 3 of 10

3. Question

Which function is used to allocate memory for an array during runtime?

malloc()
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alloc()
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memalloc()
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array()
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Question 4 of 10

4. Question

What does malloc() return when memory allocation fails?

0
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1
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NULL
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-1
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Question 5 of 10

5. Question

Which function is used to free dynamically allocated memory in C?

remove()
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clear()
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free()
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delete()
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Question 6 of 10

6. Question

Which function is used to allocate memory and also initialize it to zero?

malloc()
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calloc()
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realloc()
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initmem()
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Question 7 of 10

7. Question

What is the purpose of realloc() in dynamic memory allocation?

To free memory
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To copy a string
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To change the size of previously allocated memory
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To initialize memory
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Question 8 of 10

8. Question

What kind of memory is used by dynamic memory allocation?

Stack
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Register
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Cache
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Heap
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Question 9 of 10

9. Question

int *ptr = (int*) malloc(5 * sizeof(int));

dealloc(ptr);
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release(ptr);
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free(ptr);
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remove(ptr);
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Question 10 of 10

10. Question

What should always be done after memory is freed using free()?

Nothing
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Call malloc() again
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Set the pointer to NULL
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Use realloc()
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