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Quiz on C++ Pointers

Prerequisite: C++ Pointers

The best way you can learn C++ Pointers concepts is by hands-on practice. This C++ Pointers Quiz is perfect for both beginners and experienced programmers who want to master pointers in C++. Here you'll find questions that covers everything from basic pointer concepts to more advanced topics like dynamic memory allocation. Each question comes with a clear explanation, helping you understand not just the correct answer but why it's correct.

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Question 1

What is a pointer in C++?

A variable that stores a data type
A function that points to a variable
A variable that stores the memory address of another variable
A reference variable

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Question 2

Which of the following is the correct syntax to declare a pointer?

int ptr;
int &ptr;
ptr *int
int *ptr

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Question 3

What is the output of the following C++ code?

C++

#include<iostream> using namespace std;  int main() {     int var = 5;     int *ptr = &var;     cout << *ptr;     return 0; }

0
5
Address of var
Garbage value

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Question 4

How do you dynamically allocate memory for an array in C++ using pointers?

int arr[10];
int *arr = new int[10];
int *arr = malloc(10 * sizeof(int));
int *arr = int[10];

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Question 5

What does the following C++ code do?

C++

#include<iostream> using namespace std;  int main() {     int *ptr = NULL;     ptr = new int;     *ptr = 7;     cout << *ptr;     delete ptr;     return 0; }

Outputs 0
Outputs 7
Causes a compile-time error
Causes a segmentation fault

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Question 6

What happens if you dereference a NULL pointer in C++?

Outputs 0
Undefined behavior
Causes a compile-time error
Outputs NULL

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Question 7

How can you release the memory allocated by a pointer in C++?

delete pointer;
free(pointer);
release(pointer);
remove(pointer);

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Question 8

Which operator is used to access the value stored at the address stored in a pointer variable?

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Question 9

What is the correct way to declare a constant pointer to an integer in C++?

int const *ptr;
const int * const ptr;
const int *ptr;
int * const ptr;

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Question 10

What will be the output of the following C++ code?

C++

#include<iostream> using namespace std;  void updateValue(int *ptr) {     *ptr = 20; }  int main() {     int var = 10;     updateValue(&var);     cout << var;     return 0; }

10
0
20
Garbage value

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C++

C++ Quiz

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