Python-Variables, Expressions

Which of the following is a comment in Python?

• /* This is a test */

• // This is a test

• * This is a test

• # This is a test

What does the following code print out?

print("123" + "abc")

• 123 abc

• This is a syntax error because you cannot add strings

• 123+abc

• 123abc

Which of the following is a bad Python variable name?

• Spam

• _spam

• 23spam

• SPAM23

Which of the following variables is the "most mnemonic"?

• x1q3z9ocd

• variable_173

• hours

• x

Which of the following is not a Python reserved word?

• iterate

• continue

• break

• else

Which of the following elements of a mathematical expression in Python is evaluated first?

• *

• /

• ()

• +

What will be the value of x after the following statement executes:

x = 1 + 2 * 3 - 8 / 4

• 5.0

• 4

• 15

• 3.0

What does the Python input() function do?

• Take a screen shot from an area of the screen

• Connect to the network and retrieve a web page

• Read the memory of the running program

• Pause the program and read data from the user

Assume the variable x has been initialized to an integer value (e.g., x = 3). What does the following statement do?

x = x + 2

• This would fail as it is a syntax error

• Produce the value "false" because "x" can never equal "x+2"

• Retrieve the current value for x, add two to it and put the sum back into x

• Create a function called "x" and put the value 2 in the function

How to check the data type of 45.6

(a)