Computer Science Essentials Semester Exam 2021

• 50 spaces

• 60 spaces

• 10 spaces

• 5 spaces

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

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

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

• You need Tracy to move forward by 100.

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

• You need to change Tracy’s color.

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

• 
• 
• 
• 

• # 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():

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

• color

• turn

• backward

• left

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

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

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

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

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

Which of the following statements are true about for loops?

A. By default, the range function starts at 0

B. Using for i in range(4) will result in i taking the values 0, 1, 2, 3, 4

C. For loops let you repeat something any number of times

D. Statements in a for loop do not need to be indented

E. It is not possible to have the range values count 6, 12, 18, 24

F. It is not possible to have the range values count 1, 2, 4, 8, 16

• A, C, and F

• A, B, C, and F

• A, B, C, E, and F

• A and C

Which of the following functions is defined correctly?

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• 
• 
• 

Which of the following is NOT a purpose of using functions?

• Functions let Tracy do new things.

• Functions help group statements together to make your code more readable.

• Functions let you execute code a fixed number of times.

• Functions allow the programmer to reuse code.