Software 3

In Python, a variable must be declared before it is assigned a value:

• True

• False

In Python, a variable may be assigned a value of one type, and then later assigned a value of a different type:

• True

• False

Which of the following statements assigns the value 100 to the variable x in Python:

• x ← 100

• let x = 100

• x := 100

• x = 100

• x << 100

Choose the valid Python variable names:

• route66

• ver1.3

• 4square

• home_address

• Age

What is the output of the code?

• 25

• 15

• Error

• None

What does the following code print

• nothing

• usa

• colombia

• ireland

What does the code print

• ice cream is tasty!

• Nothing

Which of the following is an invalid variable? *

• _var_

• 1var

• _var_1

• All the above

Which of the following is an invalid statement?

• x_y_z = 1,000,000

• x,y,z = 1, 2, 3

• x y z = 1 2 3

• num = 1,000,000