PCEP Practice Exam 1

What will the output be after executing the following code snippet?

• 3

• 9

• 1

• 18

Answer explanation

The ** operator is used to raise the number on the left to the power of the exponent of the right. The expression is evaluated from the right to left, and therefore it results in 9**0, which is 9.

What will the output be, if we run the following code?

• Monday, Tuesday, Wednesday, Thursday

• Friday

• None

• AttributeError: 'tuple' object has no attribute 'append'

Answer explanation

Tuples are immutable and cannot be amended once created.

How many times will it print "#"?

• 1

• 2

• 3

• 4

Answer explanation

The program will print '#' 3 times. The outer most if statement is false, so the if block is ignored, and the else block (print ("#"*3)) is executed.

What is the output of this code when "robert" is entered by the user when prompted?

• True

• error

• Robert

• False

Answer explanation

The == operator compares two values. Python is case-sensitive. The value robert is not the same as Robert.

What would be printed to the console after the following code is executed?

• Hello

• "Hello", World

• Hello World

• Hello, World

Answer explanation

The loop will print Hello once before entering into else clause, after i has is incremented by 1.

What will the output be after executing the following code?

• ('Python', 'Tuple')

• [Python, Tuple]

• ['Python', 'Tuple']

• (Python, Tuple)

Answer explanation

The answer is ('Python', 'Tuple') because the tuple() coverts the list to type tuple, keeping the same list elements.

What is the output when the following code snippet is run:

• Error

• None

• Let's enjoy a bowl of cereals

• Groceries trip pending

Answer explanation

If the value of a variable is non-zero or non-empty, bool(non_empty_variable) will evaluate to True. Hence the if clause is passed ( bool ("None") = True ) and 'Groceries trip pending' is printed to the console.

What will the output be after executing the following code?

• [6]

• [0, 1, 2, 3, 4, 5]

• -6

• (0,1,2,3,4)

Answer explanation

The list is passed to the function, which returns a list containing one element. The returned value is stored in y , overwriting the old value which was [0, 1, 2, 3, 4, 5]. The new list is then printed.

What will the output be after executing the following code?

• dict{'Python', 'Dictionaries'}

• dict({'Python', 'Dictionaries'})

• {'Python', 'Dictionaries'}

• {1: 'Python', 2: 'Dictionaries'}

Answer explanation

The program will print out {1: 'Python', 2: 'Dictionaries'} , which is the value of type dict that was assigned to the variable Dict.

What is the output of this code after the user inputs "Python" when prompted?

• PythonPythonPython

• error

• Python*3

• Python Python Python

Answer explanation

The value stored inside word is Python , without a trailing space. The program will then print the same string 3 times, without adding a space in between the words.