C++ Fundamentals: Data Types and Variables Quiz…

Q: Which data type is used to store whole numbers in C++?

int — The 'int' data type is designed to hold integer values.

Q: Which keyword is used to declare a variable in C++?

int — Data type like 'int', 'float' are used to declare a variable.

Q: What data type is used to store single characters?

char — 'char' is specifically for storing single characters, like letters.

Q: Which data type is used to store decimal numbers with single precision?

float — 'float' stores single-precision floating-point numbers.

Q: What is the primary purpose of a variable in a C++ program?

To store data — Variables hold data that can be used and manipulated by the program.

Q: Which of the following is a valid variable name in C++?

_variable — Variable names can start with an underscore or a letter.

Q: Which data type uses more memory: float or double?

double — Double-precision floats ('double') uses more memory to store larger numbers.

Q: What is the typical size (in bytes) of an 'int' variable?

4 — Typically, 'int' is 4 bytes, but can be system-dependent.

Q: What is the result of 'sizeof(char)'?

1 — The 'sizeof' operator returns the size of data types in bytes. char is usually 1 byte.

Q: Which keyword is used to declare a constant variable in C++?

const — The 'const' keyword ensures the variable's value cannot be changed after initialization.

Question 1 of 10

Which data type is used to store whole numbers in C++?

The 'int' data type is designed to hold integer values.

Question 2 of 10

Which keyword is used to declare a variable in C++?

Data type like 'int', 'float' are used to declare a variable.

Question 3 of 10

What data type is used to store single characters?

'char' is specifically for storing single characters, like letters.

Question 4 of 10

Which data type is used to store decimal numbers with single precision?

'float' stores single-precision floating-point numbers.

Question 5 of 10

What is the primary purpose of a variable in a C++ program?

Variables hold data that can be used and manipulated by the program.

Question 6 of 10

Which of the following is a valid variable name in C++?

Variable names can start with an underscore or a letter.

Question 7 of 10

Which data type uses more memory: float or double?

Double-precision floats ('double') uses more memory to store larger numbers.

Question 8 of 10

What is the typical size (in bytes) of an 'int' variable?

Typically, 'int' is 4 bytes, but can be system-dependent.

Question 9 of 10

What is the result of 'sizeof(char)'?

The 'sizeof' operator returns the size of data types in bytes. char is usually 1 byte.

Question 10 of 10

Which keyword is used to declare a constant variable in C++?

The 'const' keyword ensures the variable's value cannot be changed after initialization.

C++ Fundamentals: Data Types and Variables Quiz