C++ Pointers & References MCQ

In this post, we present you 10+ multiple-choice questions to test your knowledge of C++ pointers and references.

Each question is followed by the correct answer and an explanation to help reinforce your knowledge.

1. What does a pointer store?

a) A memory address
b) A data type
c) A value directly
d) None of the above

2. Which operator is used to get the memory address of a variable?

a) *
b) &
c) ->
d) <<

3. What will the following declaration create?

int *ptr = nullptr;
a) Integer variable named ptr
b) Pointer to a char
c) Null pointer to an integer

4. What is a reference in C++?

a) Another name for a pointer
b) An alias for an existing variable
c) A memory location
d) A type of function

5. How do you declare a reference to an integer?

a) int* ref;
b) &int ref;
c) int ref&;
d) int& ref;

6. Once a reference is initialized with a variable:

a) It can be reassigned to another variable
b) It can't refer to any other variables
c) It becomes a pointer
d) None of the above

7. Which of the following is the correct way to declare a pointer to an integer and assign it the address of an integer variable, num?

a) int ptr = num;
b) int ptr = #
c) int ptr = #
d) int &ptr = num;

8. Which of the following accesses the value at the address stored in a pointer 'ptr'?

a) &ptr
b) ptr
c) ptr
d) ptr

9. If 'ref' is a reference to a variable, which of the following is used to get its memory address?

a) ref&
b) &ref
c) ref
d) ref

10. What does the following statement do?

int &ref = *ptr;
a) It assigns the address of ptr to ref.
b) It makes ref an alias for the value pointed to by ptr.
c) It creates a new pointer ref and assigns it the value of ptr.


Related C++ Source Code Examples:

memcpy() function in C++ memmove() function in C++ memchr() function in C++ memcmp() function in C++ memset() function in C++ strcpy() function in C++ strcat() function in C++ strncat() function in C++ strlen() function in C++ strncmp() function in C++ strcmp() function in C++ strcoll() function in C++ strchr() function in C++ strspn() function in C++ strcspn() function in C++ strpbrk() function in C++ strstr() function in C++ strtok() function in C++ strerror() function in C++ fopen() function in C++ fclose() function in C++ freopen() function in C++ setbuf() function in C++ fprintf() function in C++ fscanf() function in C++ scanf() function in C++ printf() function in C++ sprintf() function in C++ sscanf() function in C++ fgetc() function in C++ fputc() function in C++ fgets() function in C++ fputs() function in C++ fread() function in C++ fwrite() function in C++ malloc() function in C++ realloc() function in C++ calloc() function in C++ free() function in C++ rand() function in C++ exit() function in C++ abort() function in C++ system() function in C++ bsearch() function in C++ qsort() function in C++ atoi() function in C++ atol() function in C++ atof() function in C++ strtod() function in C++ strtol() function in C++ abs() function in C++ clock() function in C++ time() function in C++ difftime() function in C++ mktime() function in C++ asctime() function in C++ ctime() function in C++ localtime() function in C++ strftime() function in C++ iscntrl() function in C++ isalnum() function in C++ isalpha() function in C++ isblank() function in C++ iscntrl() function in C++ isdigit() function in C++ islower() function in C++ isupper() function in C++ tolower() function in C++ toupper() function in C++ Stack Implementation in CPP Queue Implementation in CPP Deque Implementation in CPP Priority Queue Implementation in CPP Linked List Implementation in C++ Doubly Linked List Implementation in CPP Circular Linked List Implementation in CPP Binary Tree Implementation in CPP Binary Search Tree Implementation in CPP Hash Table Implementation in CPP AVL Tree Implementation in CPP Bubble Sort Algorithm in CPP Selection Sort Implementation in CPP Insertion Sort Algorithm in CPP Merge Sort Algorithm in CPP Quick Sort Algorithm in CPP Heap Sort Algorithm in CPP Shell Sort Algorithm in CPP Linear Search Algorithm in CPP Binary Search Implementation in CPP C++ Singleton Design Pattern Example C++ Factory Method Pattern Example C++ Abstract Factory Pattern Example C++ Builder Pattern Example C++ Prototype Design Pattern Example C++ Adapter Design Pattern Example C++ Bridge Pattern Example C++ Composite Pattern Example C++ Decorator Pattern Example C++ Facade Pattern Example C++ Flyweight Design Pattern Example C++ Proxy Pattern Example C++ Chain of Responsibility Pattern Example C++ Command Design Pattern Example C++ Interpreter Design Pattern Example C++ Iterator Design Pattern Example C++ Mediator Pattern Example C++ Memento Pattern Example C++ Observer Pattern Example C++ State Pattern Example C++ Strategy Pattern Example C++ Template Method Design Pattern Example C++ Visitor Design Pattern Example

Comments

Post a Comment