Python Variables and Assignment

Variables

• store values

• change during the lifetime of a program

• can be imagined to be storage boxes

• Can be created using create command

Answer explanation

Variables store values, change during the lifetime of a program, and can be imagined to be storage boxes.

Assignments are always denoted by

• = (equals symbol)

• > symbol

• assign command

• print()

Answer explanation

Assignments are always denoted by the = (equals symbol), making it the correct choice.

Assignments are executed from

• Left to right

• Right to left

• Middle to right

• Not executed

Answer explanation

Assignments are executed from right to left, meaning the rightmost assignment is performed first followed by the assignment to the left of it.

Assignments are instructions to be executed

• No

• Yes

• May be

• Not at all

Which of the following is/are valid assignment(s)

• a = 15

• b = 10.2

• x = y

• 10 = a

Answer explanation

The valid assignments are a = 15, b = 10.2, and x = y. Assigning a value to a variable with a number as the variable name like '10 = a' is not valid.

A variable can store

• Only one value at a time

• Multiple values at a time

• Atmost two values at a time

• Atmost three values at a time

Match the assignments

• invalid

• John = "name"

• valid

• y="Hello"
• valid

• 2 = x

• invalid

• "hello" = z
• valid

• age = 3.14

Is this assignment correct? Choose the right answer

J​ohn = 3.14​ (a)  

• Yes. John is the variable name. 3.14 is the value
• No. John cannot have numbers as value
• Cannot have John as Variable name
• Number cannot be stored in John

Answer explanation

The answer is correct. John is just a variable name and variable can store any value

Variables can have

• Only one value during the lifetime of a program

• Atmost 2 values during the lifetime of a program

• Any number of values during the lifetime of a program

• Cannot have any value

Answer explanation

Variables can have any number of values during the lifetime of a program, making this the correct choice.

Match the following

• variables

• storage containers

• input()

• Displays a message on to the screen

• assignments

• Asks for input from user

• input()

• executed from right

• print()

• Waits for user input