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Module 1 · Learning to Drive

Lesson 8 · Hello, Python — Knowledge ChecksAnswer key

Correct answers are marked and the explanation follows each question.

  1. Which line is written correctly?

    1. A.Print("Driving...")
    2. B.print "Driving..."
    3. C.print("Driving...")✓
    4. D.print(Driving...)

    Lowercase print, parentheses around the call, and quotes around the text. The others break one rule each.

  2. What's wrong with this line? for i in range(4)

    1. A.range should be capitalized
    2. B.It is missing the colon at the end — for i in range(4):✓
    3. C.It needs quotes around the 4
    4. D.Nothing is wrong

    Lines that start a block (for, if, def) must end with a colon.

  3. Why does drivetrain.straight(-30) drive the robot backward?

    1. A.Negative numbers reverse the direction — same as a negative cm in the Straight block✓
    2. B.It drives forward 30 cm, then stops
    3. C.It turns instead of driving
    4. D.It causes an error

    A negative distance means backward, exactly like typing a negative cm value into the block.

  4. Find the bug in the code above.

    1. A.straight should be capitalized
    2. B.Print should be lowercase: print✓
    3. C.The distances should be positive
    4. D.There is no bug

    Python is case-sensitive. Print with a capital P isn't the same as the built-in print.