c-language

1) What are the differences between structures and arrays?

2) What are the differences between malloc() and calloc()?

3) What are macros? what are its advantages and disadvantages?

4)

• Difference between arrays and linked list?
• What are enumerations?
• What are register variables? What are the advantage of using register variables?
• What is the use of typedef?
• Can we specify variable field width in a scanf() format string? If possible how?
• Out of fgets() and gets() which function is safe to use and why?
• Difference between strdup and strcpy?
• What are the advantages of using pointers in a program?
• What is the difference between Strings and Arrays?
• What is a far pointer? where we use it?
• what is a NULL Pointer? Whether it is same as an uninitialized pointer?
• What is a NULL Macro? What is the difference between a NULL Pointer and a NULL Macro?
• What does the error 'Null Pointer Assignment' mean and what causes this error?
• What is near, far and huge pointers? How many bytes are occupied by them?
• What are bit fields? What is the use of bit fields in a Structure declaration?
• Which bit wise operator is suitable for checking whether a particular bit is on or off?
• Which bit wise operator is suitable for turning off a particular bit in a number?
• Which bit wise operator is suitable for putting on a particular bit in a number?
• Which bit wise operator is suitable for checking whether a particular bit is on or off?