C Programming INTERVIEW QUESTIONS
| 17. |
What is wild pointer? |
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- Wild pointers are also known as dangling pointers.
- Pointers that do not point to valid object of the appropriate type, or to a distinguished null pointers value in language which support this.
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| 18. |
What are the drawbacks of pointer? |
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- Since the pointers point to a memory location issues of dangling pointers and wild pointers can occur.
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Dangling pointers are those pointers when the data at which they are pointed may have been modified or deleted.
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But still the pointer points to that location.
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The pointers that are not initialized lead to wild pointers because they will be pointing to some arbitrary memory.
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Also, memory leaks occur, if a memory is not released.
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| 19. |
What is the difference between while(a) and while(!a)? |
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While(a) means while(a!=0)
While(!a) means while(a==0)
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| 20. |
Execution of a C program starts from which function? |
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Always, execution of a C program starts from main() function. |
