C++ Basics

What is the primary function of a program in C++?

• To perform network operations

• To manipulate values and create new ones

• To store only integers

• To manage hardware devices

What is an expression in C++?

• A sequence of operators and operands that produces a value

• A set of commands to display output

• A loop that executes indefinitely

• A keyword to define a variable

Which of the following is a unary expression?

• `x * y`

• `x + y`

• `-x`

• `x % y`

What is the result of the expression `30 % 5`?

• 5

• 30

• 0

• 1

Which operator is used to find the remainder of a division in C++?

• /

• %

• *

• +

What is the result of the expression `7 / 2` in C++ when both operands are integers?

• 3.5

• 4

• 3

• 2

Which of the following is an example of implicit type conversion?

• Manually converting a float to an int

• A float being automatically converted to an int in an expression

• Using a cast operator to change a data type

• Explicitly defining the type of a variable

What is explicit type conversion in C++?

• When the compiler automatically changes a variable's type

• Manually converting one data type to another using casting

• Declaring a variable without initialization

• Allowing variables to change types dynamically

What does the `if` statement do in C++?

• Executes code only if a specified condition is true

• Executes code repeatedly

• Always skips execution of the code

• Executes code based on user input

Which of the following is a valid `if-else` statement?

• `if (x > 0) { x++; } else { x--; }`

• `if (x > 0) x++ else x--;`

• `if (x > 0) { x++ } elseif { x--; }`

• `if-else x > 0 { x++ };`