C++ Programming Quiz

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

• 2num

• _value

• float

• num-1

What is the size of `int` in C++?

• 2 bytes

• 4 bytes

• 8 bytes

• Depends on system

True/False: In C++, variables must be declared before use.

What will be the output of the following code? int a = 10; if(a > 5) cout << "Hello"; else cout << "World";

• Hello

• World

• HelloWorld

• No output

Which operator is used in an if statement to check equality?

• =

• ==

• ===

• !=

True/False: The `else` part in an if-else statement is mandatory in C++.

What will the following loop print? for(int i = 0; i < 3; i++) cout << i << " ";

• 0 1 2

• 1 2 3

• 0 1 2 3

• Infinite loop

True/False: A `for` loop can be written without an initialization statement.

What is the output of the following code? int i = 0; while(i < 3) { cout << i << " "; i++; }

• 0 1 2

• 1 2 3

• Infinite loop

• Error

True/False: The condition in a `while` loop is checked before executing the loop body.