Python Programming Homework 1

Python Programming Homework 1

​What is a variable?

​You may have encountered the word 'variable' in Science or Maths.

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​In programming a variable is a container for storing data (in memory) - the data stored can be changed whilst the program is running.

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​We can assign values to variables directly or we can get data from user input

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Multiple Choice

Which of the following is an example of a variable in Python?

• print("hello")

• age=13

• input("Enter your age")

• type()

Fill in the Blank

The contents of a variable can be changed while the _______ is running

Multiple Choice

a = 10

b=5

b=a+5

print(b)

What would be printed to the screen in this example?

• 5

• 10

• 105

• 15

Multiple Choice

a = 10

b=5

b=a+5

print(a)

What would be printed to the screen in this example?

• 5

• 10

• 105

• 15

Multiple Choice

a = 10

b=5

b=a+5

print(a+b)

What would be printed to the screen in this example?

• 5

• 10

• 25

• 15

​What is iteration?

In lesson 2 we looked at count-controlled loops (FOR loops). loops are also known as Iteration.

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​A For loop allows us to repeat an instruction a set number of times.

​

Remember the Happy Birthday program you wrote in the lesson? You used a for loop to control the output of the song - it also saved you having to repeat lines of code.

​

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Multiple Choice

FOR loops are

• loops which run an unknown number of times

• loops which run for a specific number of times

• the same as if statements

• not part of programming

Multiple Choice

This loop can only be used when the programmer knows the number of times a code is to be repeated

• while

• for

• do while

• repeat until

Multiple Choice

Which kind of loop would be used?

I need a revision program that will run through revision questions 4 times.

• FOR Loop

• WHILE Loop

Multiple Choice

In programming, what is iteration?

• The repetition of steps within a program

• The order in which instructions are carried out

• A decision point in a program

• Testing a program to make sure it works

Multiple Choice

Why is iteration important?

• It determines the order in which instructions are carried out

• It allows code to be simplified by removing duplicated steps

• It allows multiple paths through a program

• It ensures the code works correctly

Multiple Choice

Look at the following code, what will it generate

• 1,2,3,4,5,6,7,8,9,10,11,12

• 0,1,2,3,4,5,6,7,8,9,10,11,12

• 1,2,3,4,5,6,7,8,9,10,11,12,13

• 0,1,2,3,4,5,6,7,8,9,10,11,12,13

Multiple Choice

What does the following program display?

• 1,2,3,4

• 1,2,3,4,5

• counter,counter,counter,counter,counter

• 0,1,2,3,4,5

Multiple Choice

What does the program display as its output?

• 1,2,3,4