3.1-3.9 Programming Concepts 1

What is a variable in programming?

• A fixed value in a program

• A storage location for a value that can change

• A mathematical function

• A piece of code that runs a program

Which of the following is a valid variable assignment?

• x ← 5

• 5 ← x

• 5 = x

• x -> 5

What happens if a variable is assigned a new value?

• The original value remains unchanged

• The variable stores both the old and new values

• The old value is replaced by the new one

• The program crashes

What is the result of the following pseudocode? a ← 10 b ← a a ← 20 display(b)

• 10

• 20

• 30

• Error

Which of the following best describes an assignment statement?

• It assigns a function to a variable

• It assigns a value to a variable

• It compares two values

• It deletes a variable

What is the main purpose of data abstraction?

• To store all data as numbers

• To simplify complex data by hiding details

• To increase memory usage

• To write more code

A list is best described as:

• A single variable holding one value

• A collection of related values

• A function in a program

• A type of loop

How does data abstraction help in programming?

• It makes code harder to understand

• It hides unnecessary details

• It prevents variables from changing

• It speeds up the computer

Which of the following is NOT an example of data abstraction?

• Using a list to store student names

• Using a loop to print values

• Using a function to sort numbers

• Using variables instead of raw data

What happens when you assign one list to another in many programming languages?

• A copy of the list is created

• Both variables refer to the same list

• An error occurs

• The second list is deleted