Python Programming Concepts Quiz

Suppose you write a function. How many times can you call the function in your code?

• Once

• Not more than the number of commands the function holds

• It depends on the function

• As many times as you want

Answer explanation

You can call a function as many times as you want, regardless of its internal commands. This flexibility allows for repeated execution, making the correct answer 'As many times as you want'.

In which of the following situations would it be best to make a function?

• A. You want Tracy to draw a blue line, and your program requires lots of blue lines.

• B. You need Tracy to move forward by 100.

• C. You need Tracy to turn right and then turn left.

• D. You need to change Tracy's color.

Answer explanation

Creating a function for drawing blue lines (Choice A) is efficient since it allows you to reuse the same code multiple times, reducing redundancy. The other options involve single actions that don't benefit from a function.

Fill in the blank: A function in programming is a reusable block of code that performs a specific task. You can call a function ______ times in your code.

• once

• twice

• multiple

• zero

Answer explanation

A function can be called multiple times in your code, allowing for code reuse and modularity. This flexibility is essential for efficient programming, making 'multiple' the correct choice.

Which of the following pieces of code will make Tracy do the following actions three times: go forward, change colors, and then turn around?

• for i in range(4): forward(30) color("blue") left(180)

• for i in range(3): forward(30) color("blue") left(180) color("red")

• for i in range(3): backward(30) color("blue") left(180)

• forward(30) color("blue") left(180) forward(30) color("green") left(180) forward(30) color("orange") left(180)

Answer explanation

The correct choice is the second option. It correctly repeats the actions of going forward, changing colors, and turning around three times, with an additional color change to red after each turn.

Which of the following functions would be the most useful function to write in order to solve this problem?

• # Has Tracy draw a single triangle def make_triangle():

• # Change's Tracy's color to red def change_to_red():

• # Moves Tracy forward by 100 def move_100():

• # Draws a square def my_function():

Answer explanation

The function 'make_triangle()' is the most useful because it directly addresses the problem of drawing a triangle, which is the main task. The other functions either change color or perform unrelated actions.

Which of the following is NOT a command you can give to Tracy?

• color

• turn

• backward

• left

Answer explanation

The command 'color' is not a valid command for Tracy, while 'turn', 'backward', and 'left' are all commands that can be given to her. Therefore, 'color' is the correct answer.

Which of the statements below is true about indentation in Python?

• A. Indentation only matters in for loops. Then, everything must be indented one level.

• B. Indentation never matters in Python. You can align your code any way you like, but indentation makes your code easier to read.

• C. Indentation always matters in Python. Every statement must be aligned correctly.

• D. Indentation only matters in functions. Then, everything must be indented one level.

Answer explanation

C is correct because indentation is crucial in Python. It defines the structure and flow of the code, indicating which statements belong to which blocks, such as loops and functions. Incorrect indentation will lead to errors.

Fill in the blank: By default, the range function starts at ___.

• 0

• 1

• 2

• 3

Answer explanation

By default, the range function in Python starts at 0. This means that if you call range(n) without specifying a start value, it will generate numbers starting from 0 up to, but not including, n.

What is the difference between defining and calling a function?

• A. Defining a function means you are teaching the computer a new word. Calling a function means you are commanding the computer to complete defined actions.

• B. There is no difference.

• C. Calling a function means you are teaching the computer a new word. Defining a function means you are commanding the computer to complete defined actions.

• D. Defining a function must be done each time you want to use the function. Calling a function can only happen once in your code.

Answer explanation

A is correct because defining a function creates a reusable block of code (teaching a new word), while calling a function executes that code (commanding the computer to perform actions).

What does the number in the parentheses in a forward or backward command represent?

• How many degrees Tracy is supposed to turn

• How fast Tracy is supposed to move

• How many times Tracy should repeat the command

• How far Tracy is supposed to move

Answer explanation

The number in parentheses in a forward or backward command indicates how far Tracy is supposed to move. It specifies the distance rather than the speed, angle, or repetition of the command.