CS Principles - Unit 3 Quiz

When do you use an else statement?

• To tell what will happen when an if-statement is false

• To end an IF statement

• To handle string values

• To input a variable

Select all the mistakes (there may be more than one) in the following:

• The = should be ==

• elseif should be elif

• there is no end if

• The else should have a :

Which of the following is NOT true about all algorithms?

• All algorithms can only do number calculations.

• All algorithms have clear instructions.

• All algorithms stop in a finite amount of time.

• All algorithms have an order.

The following code could be rewritten using:

• not

• or

• and

• none of the answers

When should you use an ELIF statement?

• To repeat sections of code

• To make a follow-up True/False decision

• To counter user actions

• To get user input

Write the code to test if the number in the variable text1 is greater than 15.

• if (text1 > "15"):

• if (text1 < "15"):

• if (text1 >= 15):

• if (text1 > 15):

Write the code to test if the number 78 is stored in the variable text1:

• if (text1 == "78"):

• if (str(text1) == 78):

• if (text1 == 78):

• if ("text1" == 78):

Write the code to test if the variables num1 and num2 are not the same.

• if (num1 < num2):

• if (num1 != num2):

• if (not(num1 != num2)):

• if (num1 == num2):

To test if x is greater than or equal to y:

if (x ___ y):

• >

• <

• <=

• >=

What is the output?

• 1

• 2

• 3

• 4