C++ 40Questions

Which of the following statements is used to add single line comments in C++?

• // This is a comment

• /* This is a comment */

• <!-- This is a comment -->

• // This is a comment //

How do you input data from the user in C++?

• cin

• cout

• endl

• scanf

How do you output data to the console/output in C++?

• cin

• cout

• endl

• printf

Which manipulator is used to insert a new line in the output stream?

• cin

• cout

• endl

• printf

Which of the following is not a valid variable name in C++?

• myVariable

• 123abc

• _variable

• variable2

How do you concatenate two strings in C++?

• str1 + str2

• str1 . str2

• str1 & str2

• str1 : str2

Which operator is used for logical AND in C++?

• &&

• ||

• !

• &

Which operator is used for logical OR in C++?

• &&

• ||

• !

• &

Which operator is used for logical NOT in C++?

• &&

• ||

• !

• ^

What is the result of the expression "x++" in C++?

• Increment the value of x and return the old value

• Increment the value of x and return the new value

• Decrement the value of x and return the old value

• Decrement the value of x and return the new value