Question

Which of the following statements are correct, about pointers and arrays in C++? A. Arrays are contiguous memory blocks. B. A pointer can hold the address of an array element. C. \(int *P = arr;\) is valid if arr is an array. D. Function pointers cannot be used to call functions dynamically. E. Pointer arithmetic depends on data type size.

• A. A, B, D and E only
• B. A, B, C and E only
• C. B, C and D only
• D. B, D and E only

Hint:

Array name gives the base address of the array. Pointer arithmetic always moves according to the size of the data type.

Answer 1

The Correct Option is B

Concept:
In C++, arrays and pointers are closely related. The name of an array usually represents the address of its first element.

Step 1: Check statement A.
Arrays store elements in contiguous memory locations. \[ A \text{ is correct} \]

Step 2: Check statement B.
A pointer stores the address of a variable. Therefore, it can store the address of an array element. \[ B \text{ is correct} \]

Step 3: Check statement C.
If \(arr\) is an integer array, then: \[ int *P = arr; \] is valid because \(arr\) represents the address of the first element of the array. \[ C \text{ is correct} \]

Step 4: Check statement D.
Function pointers can be used to call functions dynamically. Therefore, the statement saying they cannot be used is incorrect. \[ D \text{ is incorrect} \]

Step 5: Check statement E.
Pointer arithmetic depends on the size of the data type. For example, if an integer takes 4 bytes, then incrementing an integer pointer moves it by 4 bytes. \[ E \text{ is correct} \] Thus, the correct statements are: \[ A, B, C \text{ and } E \] \[ \therefore \text{Correct Answer is (B)} \]