Python test 1

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

• True

• False

Which one of the following is the correct way of declaring and initializing a variable, x with the value 7?

• 1. int x
     x=7

• 1. int x=7

• 1. x=7

• declare x=7

What will be the output of statement 2**2**2**2

• 1. 16

• 256

• 32768

• 65536

Which of the following statement is False?

• 1. Variable names can be arbitrarily long.

• They can contain both letters and numbers.

• 1. Variable name can begin with underscore.

• 1. Variable name can begin with number.

What is the output of the following code: print 9//2

• 1. 4

• 4.5

• 4.0

• Error

Which of the following is not a valid variable name in Python?

• 1. _var

• 1. var_name

• 1. var11

• 1. 5var

What is the maximum length of an identifier in python?

• 32

• 31

• 63

• None of the above

Which of the following declarations is incorrect?

• 1. _x = 2

• 1. __x = 3

• 1. __xyz__= 5

• 1. None Of the below

What is the result of round(0.5) – round(-0.5)?

• 1. 1.0

• 1. 2.0

• 1. 0

• None of the above

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

• True

• False