PROGRAMMING IN C AND DATA STRUCTURES - UNIT III

What is the primary purpose of pointers in C programming?

• To store integer values

• To store memory addresses

• To create arrays

• To define functions

Which operator is used to declare a pointer in C?

• &

• #

• *

• ->

What happens when you add 1 to a pointer?

• It points to the next byte in memory

• It points to the next element of the same data type

• It doubles the memory address

• It creates a new pointer

What is a chain of pointers?

• A linked list

• An array of pointers

• Pointers to pointers (multiple indirection)

• A series of memory addresses

How can you access the third element of an array 'arr' using pointer arithmetic?

• arr + 3

• *(arr + 2)

• &arr[3]

• *arr[2]

What is the primary advantage of using an array of pointers?

• It saves memory

• It allows for faster computation

• It provides flexibility in handling variable-length data

• It simplifies pointer arithmetic

When passing arguments to a function, what does pass-by-reference using pointers allow?

• Faster function execution

• Ability to modify the original variables in the calling function

• Automatic memory management

• Creation of local copies of variables

Which of the following should a function returning a pointer generally NOT return?

• Dynamically allocated memory

• Address of a static variable

• Address of a global variable

• Address of a local variable

What is a key difference between a function pointer and a regular pointer?

• Function pointers can only point to void functions

• Function pointers store addresses of functions instead of data

• Regular pointers can't be used in arrays

• Function pointers use different memory allocation

How can function pointers be used to implement simple polymorphism in C?

• By creating virtual functions

• By overloading functions

• By allowing runtime selection of functions to execute

• By enabling inheritance between structures