Pointer Exercise Challenge

What is the result of adding 1 to a pointer?

• The pointer value is decremented by 1

• The pointer value is multiplied by 1

• The result of adding 1 to a pointer depends on the data type the pointer is pointing to, as it increments the memory address by the size of that data type.

• Adding 1 to a pointer results in a null pointer

How do you dereference a pointer in C++?

• &pointerVariable

• pointerVariable->

• (*pointerVariable)

• pointerVariable*

What is the correct way to initialize a pointer in C?

• int *ptr = &variable_name;

• int *ptr = *variable_name;

• int *ptr = variable_name;

• int ptr = &variable_name;

When comparing two pointers, what does it mean if they are equal?

• They are pointing to the end of memory.

• They are pointing to adjacent memory locations.

• They are pointing to the same memory location.

• They are pointing to different memory locations.

What is a pointer to pointer and how is it used?

• A pointer to pointer is a variable that stores the memory address of a variable directly.

• A pointer to pointer is used to perform arithmetic operations on memory addresses.

• A pointer to pointer is a data structure used to store multiple values.

• A pointer to pointer is a variable that stores the memory address of another pointer. It is used to indirectly access a memory location or a pointer.

Explain how pointers are passed as function parameters.

• Pointers are passed by reference in Java.

• Pointers are passed by value in C and C++.

• Pointers are passed by reference in C and C++.

• Pointers are not allowed as function parameters in C and C++.

What happens if you try to dereference a null pointer?

• Runtime error

• Segmentation fault or access violation

• Memory leak

• Infinite loop

How can pointer arithmetic be used to iterate over an array?

• By incrementing the pointer to move to the next element in the array

• By dividing the pointer to skip elements in the array

• By multiplying the pointer to access a specific element in the array

• By decrementing the pointer to move to the previous element in the array

What is the size of a pointer in C++?

• 4 bytes on a 32-bit system and 8 bytes on a 64-bit system

• 1 byte on a 32-bit system and 2 bytes on a 64-bit system

• 2 bytes on a 32-bit system and 4 bytes on a 64-bit system

• 8 bytes on a 32-bit system and 16 bytes on a 64-bit system

Can a pointer be used to access variables outside its scope?

• No

• Sometimes

• Rarely

• Yes