pointers quizz

Akhil is learning C programming and wants to organize his data effectively. Which of the following is used to define a structure in C?

• A) struct

• B) structure

• C) structural

• D) class

During a programming class, Alisha is learning about different data types in C. She comes across a concept that allows her to define a variable that can hold multiple types of data. What keyword is used to create a union type in C?

• A) union

• B) type

• C) combine

• D) merge

Ishaan is learning C programming and wants to understand how to declare pointers. Which of the following is a valid way for him to declare a pointer in C?

• A) int *ptr;

• B) int ptr*;

• D) ptr int;

• C) *int ptr;

Arnav is learning C programming and comes across the 'sizeof' operator. What is the purpose of the 'sizeof' operator in C?

• A) To determine the size of a variable

• C) To declare a variable

• D) To initialize a variable

• B) To allocate memory

Avani is trying to understand what happens to a pointer in C that has not been initialized. What is the value of such a pointer?

• C) Undefined

• B) 0

• A) NULL

• D) Random value

Rohan has a box that contains a key to another box. Which operator is used to access the value at the address stored in Rohan's box?

• D) ::

• C) ->

• B) *

• A) &

What happens when Krish tries to dereference a NULL pointer in C?

• D) It is safe and does nothing

• C) It returns a random value

• B) It causes a segmentation fault

• A) It returns 0

Avyaan is working on a C programming project and needs to allocate memory for an integer pointer. What is the correct way for him to do this?

• A) ptr = (int*)malloc(sizeof(int));

• B) ptr = malloc(int);

• C) ptr = (int*)malloc(int);

• D) ptr = malloc(sizeof(ptr));

In a programming class, Anika is trying to define a constant in C for the maximum number of students allowed in a project group. Which of the following correctly defines a constant in C?

• D) All of the above

• A) const int maxStudents = 10;

• B) int const maxStudents = 10;

• C) #define maxStudents 10

During a programming class, Krish is curious about the size of different data types in C. He runs the following code: printf("%d", sizeof(char)); What is the output of this code?

• D) Depends on the compiler

• B) 2

• A) 1

• C) 4