Programming Concepts Quiz

Which of the following is true about comments in code?

• Every function should have a comment

• Comments are not necessary for any code

• Comments are only needed for complex code

• Every line of code must have a comment

What is a precondition in the context of a function?

• The function's parameters

• What is true about the world before the function is called

• What is true about the world after the function is called

• The function's return value

Which of the following is true about postconditions?

• They describe the initial state of the world

• They describe the function's parameters

• They describe the state of the world after the function is called

• They are irrelevant to function execution

In programming, what must be true before a function is executed?

• The postcondition

• The function's name

• The function's output

• The precondition

What is the purpose of defining preconditions and postconditions?

• To determine the function's name

• To define the function's parameters

• To describe the state of the world before and after the function is called

• To calculate the function's execution time

Which of the following is equivalent to writing 'move();' five times?

• for(var i = 0; i < 5; i++) { move(); }

• for(var i = 0; i < 4; i++) { move(); }

• for(var i = 1; i < 5; i++) { move(); }

• for(var i = 1; i <= 5; i++) { move(); }

What is the main advantage of using a for loop over writing repetitive code manually?

• It reduces the amount of code written

• It increases the complexity

• It makes the code run faster

• It makes debugging harder

What is the purpose of a for loop in programming?

• To repeat commands for a fixed number of times

• To execute commands indefinitely

• To execute commands only once

• To stop the execution of a program

What is the initial value of the variable 'i' in the for loop example?

• 0

• 10

• 1

• 5

What is the purpose of using conditions in Karel's world?

• To change Karel's appearance

• To increase the number of tennis balls

• To adapt to different situations

• To make Karel move faster