CompSci Autumn 2022/23 Python

Question 1

1.1 What is input?

Answer 1

Input is where the user enters data. This could be the user typing data in.

Question 2

1.2 What is output?

Answer 2

Output is where the program shows the user data. This could be a message on screen.

Question 3

1.3 How do you output the message “Hello world”?

Answer 3

print(“Hello world”)

Question 4

1.4 How do you let a user type in data?

Answer 4

age = datatype(input(“Enter age:”)

Question 5

2.1 What is a variable?

Answer 5

In a computer program, a variable is used to store data.

Question 6

2.2 How do you make the program store the user’s input?

Answer 6

name = datatype(input(“Enter name:”) will store the user’s input in a variable called ‘name’.

Question 7

2.3 How do you output the contents of a variable?

Answer 7

print(name) will output the data held in the variable ‘name’.

Question 8

2.4 int data type

Answer 8

Integer – stores whole numbers

Question 9

2.5 str data type

Answer 9

String – can store a sequence of characters

Question 10

2.6 float data type

Answer 10

Can store decimal values e.g. 3.5

Question 11

2.7 bool data type

Answer 11

Can store a True or False value only.

Question 12

3.1 What is selection?

Answer 12

Selection is where a program checks a condition, and the program responds accordingly.

Question 13

3.2 What is a condition?

Answer 13

The condition is an expression that will result in a True or False value e.g. 1 = 2 will result in False.

Question 14

3.3 Indentation

Answer 14

Refers to space at the beginning of a code line. In Python indentation is used to indicate a block of code.

Question 15

3.4 How would you make a program show “Well done” if the variable score is above 10?

Answer 15

if score > 10: print (“Well done”)

Question 16

3.5 What does the command “elif” do?

Answer 16

Allows additional conditions to be checked.

Question 17

3.6 What does “else” do?

Answer 17

This tells the program what to do if none of the conditions are True.

Question 18

4.1 What is iteration?

Answer 18

Iteration repeats a sequence of code instructions.

Question 19

4.2 What are the two types of iteration?

Answer 19

Definite iteration (count controlled) and indefinite iteration (condition controlled).

Question 20

4.3 What is definite iteration?

Answer 20

Definite iteration repeats lines of code a specific number of times, usually using a FOR loop.

Question 21

4.4 How would you make the program repeat code 5 times?

Answer 21

for i in range (6): code to be repeated

Question 22

4.5 What is indefinite iteration?

Answer 22

Indefinite iteration repeats lines of code until a condition is no longer met, usually with a WHILE loop.

Question 23

4.6 How would you make the program repeat while lives are greater than 0?

Answer 23

While lives > 0: code to be repeated