Dynamic Memory Allocation in C (Hindi) | Part 5 | Resize Memory | The realloc() Fun | Suraku Academy

Описание: In this video, we deeply understand the working of the realloc() function in C and how it modifies previously allocated memory blocks created using malloc() and calloc().

This lecture explains both practical and theoretical aspects of realloc(), including resizing memory when the required size increases or decreases.

Topics Covered in This Video:
• What is realloc() and why it is needed.
• Syntax and declaration of realloc().
• Using realloc() with memory allocated by malloc().
• Using realloc() with memory allocated by calloc().
• Increasing the size of a memory block.
• Decreasing the size of a memory block.
• What happens to old data after resizing?
• When memory location changes internally.
• Proper assignment technique to avoid memory loss.

Important Facts About realloc() Explained:
✔ What happens if the previously allocated pointer (ptr) is NULL?
→ realloc(NULL, size) works?
✔ What happens if the new size is 0?
→ realloc(ptr, 0) works?
✔ When does the memory block move to a new location?
✔ How data is preserved during reallocation.
✔ Risk of memory leak if realloc() is used incorrectly.

This video is extremely important for understanding advanced dynamic memory management, which is frequently asked in:
• BCA / MCA / B.Tech exams.
• Computer Anudeshak (BCI / SCI) exams
• UGC-NET Computer Science
• Technical interviews

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