What is dynamic memory allocation in C?

Memory Allocation in C

Quiz
•
Computers
•
University
•
Medium
Juris Ormanis
Used 3+ times
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17 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dynamic memory allocation in C is only used for static data structures
Dynamic memory allocation in C allows programs to request memory at runtime, enabling the creation of data structures like arrays and linked lists that can grow or shrink as needed.
Dynamic memory allocation in C is a compile-time process
Dynamic memory allocation in C is a fixed memory allocation technique
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can memory leaks occur in C?
Memory leaks in C happen when memory is allocated and deallocated simultaneously.
Memory leaks in C are caused by not using memory allocation functions.
Memory leaks in C occur when memory is deallocated before being allocated.
Memory leaks in C can occur when memory is allocated but not deallocated properly.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are some best practices for memory allocation in C?
Ignore memory leaks as they are not critical
Some best practices for memory allocation in C include: always free memory that has been allocated, avoid memory leaks, be cautious with pointer arithmetic, use tools like valgrind, and allocate memory only when necessary.
Always allocate the maximum amount of memory possible
Use arbitrary values for pointer arithmetic
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the concept of dynamic arrays in C.
Dynamic arrays in C do not require memory allocation functions like malloc() and realloc()
Dynamic arrays in C are fixed-size arrays that cannot change in size
Dynamic arrays in C are arrays that can grow or shrink in size during execution. They are implemented using pointers and memory allocation functions like malloc() and realloc(). When the array needs to be resized, a new larger memory block is allocated, the elements are copied over, and the old memory block is deallocated.
Dynamic arrays in C are implemented using stack memory instead of heap memory
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you allocate memory for a dynamic array in C?
Use calloc(sizeof(data_type), number_of_elements) to allocate memory for a dynamic array in C.
Use malloc(sizeof(data_type) * number_of_elements) to allocate memory for a dynamic array in C.
Use realloc(sizeof(data_type) * number_of_elements) to allocate memory for a dynamic array in C.
Use free(sizeof(data_type) * number_of_elements) to allocate memory for a dynamic array in C.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a memory leak and how can it be avoided?
Memory leak occurs when a program releases memory too frequently
Memory leak is when a program allocates memory but fails to release it, leading to a gradual reduction in available memory. It can be avoided by proper memory management, using tools like automatic garbage collection, and conducting regular memory leak detection.
Memory leak can be avoided by restarting the computer frequently
Memory leak is when a program intentionally holds onto memory to improve performance
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important to free dynamically allocated memory in C?
To save memory for future use
To prevent memory leaks and ensure efficient memory usage.
To slow down the program
To confuse other programmers
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