Python - Lesson 4 - Inputs, Processes and Outputs

What is the purpose of testing a program?

• To increase bugs in the program

• To slow down the program

• To verify that the program does what it is meant to

• To confuse programmers

Answer explanation

To verify that the program does what it is meant to

What is the input-process-output model used for in computer programs?

• Accept data as input, carry out processing, and display or store the output

• Create errors in the program

• Stop the program from running

• Ignore user input

Answer explanation

Accept data as input, carry out processing, and display or store the output

What is the purpose of the int and float commands in Python?

• Delete variables in the program

• Display text on the screen

• Stop the program from executing

• Perform conversions from strings to integers or floating point numbers

Answer explanation

Perform conversions from strings to integers or floating point numbers

What happens when the input and int commands are combined on the same line in Python?

• Function composition where the innermost function is executed first

• The program crashes

• The computer freezes

• The program runs faster

Answer explanation

Function composition where the innermost function is executed first

Why might it be necessary to convert values from strings to integers in Python?

• To speed up the programme

• To do calculations

• To remove errors in the program

• To confuse the user

Answer explanation

To convert values from strings to integers in Python is necessary to do calculations, as arithmetic operations can only be performed on numerical data types.

What is the term used for checking small pieces of code?

• String conversion

• Variable declaration

• Function composition

• Unit testing

Answer explanation

Unit testing is the term used for checking small pieces of code, ensuring they work as expected in isolation.

What is the result of subtracting two strings in Python?

• Python does not support the subtraction operation on strings

• The first string gets shorter

• The program crashes

• The computer freezes

Answer explanation

Python does not support the subtraction operation on strings

What is the purpose of using the 'break' statement in a loop?

• To skip the current iteration and move to the next one

• To end the loop and move to the next statement after the loop

• To restart the loop from the beginning

• To slow down the loop execution

Answer explanation

To end the loop and move to the next statement after the loop

What is the role of 'elif' in Python conditional statements?

• To check for multiple conditions after the 'if' statement

• To end the conditional block

• To introduce a new condition after 'else' statement

• To confuse the interpreter

Answer explanation

To check for multiple conditions after the 'if' statement