Term 2 Python

Question 1

Is the next line a valid print statement?

print(“Hello World”)

Answer 1

Yes, it prints ‘Hello World’ on screen

Question 2

Is the next line a valid print statement?

print()

Answer 2

Yes, it prints a blank line (useful for spacing information out on screen).

Question 3

Are the next 4 lines a valid print statement?
print('''
Hello
world
''')

Answer 3

Yes, using triple quotes at the start and the end keeps the formatting (layout) so this prints as:
Hello
world

Question 4

Is the next line a valid print statement?

print(Hello World)

Answer 4

No - it is missing speech marks and so will not print.

Question 5

Would this code allow the user to enter the radius of a circle which could be used in a calculation?
radius = input(“Please enter a number”)

Answer 5

No - the value input would be a string and would not work in a calculation.

Question 6

Would this code allow the user to enter the radius of a circle which could be used in a calculation?
radius = value(input(“Please input a number”))

Answer 6

No - value is not understood by Python

Question 7

Would this code allow the user to enter the radius of a circle which could be used in a calculation?
radius = float(input(“Please input a number”))

Answer 7

Yes - the value input by the user is “cast” (changed) to a floating point number (number with a decimal).

Question 8

Would this code allow the user to enter the radius of a circle which could be used in a calculation?
radius = number(input(“Please input a number”))

Answer 8

No - number is not understood by Python

Question 9

What data type is used for several characters in a row, e.g. “value34” or “End of Game!”?

Answer 9

string

Question 10

What data type is used for whole numbers, e.g. 78 or -99?

Answer 10

integer (int for short)

Question 11

What data type is used for numbers with a decimal point, e.g. 3.14 or 66.9?

Answer 11

floating point number (float for short)

Question 12

What data type is used to hold values that can only be True or False?

Answer 12

boolean (bool for short)

Question 13

Can the command below be used to allow the user to
enter data which can be saved into a variable?
enter

Answer 13

No enter is not a command word recognised in Python

Question 14

Can the command below be used to allow the user to enter data which can be saved into a variable?
input

Answer 14

Yes:

variable = input(“please give me some data “)

Question 15

Can the command below be used to allow the user to enter data which can be saved into a variable?
print

Answer 15

No this just prints out but does not allow entry of data

Question 16

Can the command below be used to allow the user to enter data which can be saved into a variable?
float

Answer 16

No a floating point number is one with a decimal point in it e.g. 3.4

Question 17

Does the statement below test to see if the size is 5?

if size is 5:

Answer 17

Yes!

Question 18

Does the statement below test to see if the size is 5?

if size = 5:

Answer 18

No, a single = is used to assign a value to a variable e.g. score = 10 sets the variable ‘score’ to have a value of 10

Question 19

Does the statement below test to see if the size is 5?

if size == 5:

Answer 19

Yes!

Question 20

Does the statement below test to see if the size is 5?

if size != 5:

Answer 20

No, =! is the boolean operator for “is not equal” so this tests whether size is not 5

Question 21

What happens when you run the following code?

print(“\tHello World”)

Answer 21

it will print Hello World after a tab (usually 4 spaces) like this:
Hello World

Question 22

Which of these are ways of repeating sections of code?

a) during loop
b) while loop
c) repeat loop
d) for loop

Answer 22

while and for are loops e.g.
for counter in range (0, 5):
print(counter) # this prints the values 0, 1, 2, 3, 4

while score == 10:
code_here # runs the code while score is 10

Question 23

What are the mathematical operators for Python?

Answer 23

In Python the mathematical operator for:
addition is + e.g. 2 + 2 = 4
subtraction is - e.g. 6 - 3 = 3
multiplication is * e.g. 2 * 5 = 10
division is / e.g. 6 / 2 = 3
orders is ** e.g. 3 ** 2 = 9
modulus (remainder after division) is % e.g. 10 % 3 = 1
(there is 1 left when we divide 10 by 3)

Question 24

How do we make our code take decisions in Python?

Answer 24

use the if statement e.g.
if score > 10: # if score is greater than 100
print(“You score is more than 10!”)
elif score > 8: # if score less than 10 & more than 8
print(“Your score is 9”)
else: # if the score is not more than 8 (is 8 or less)
print(“Your score is 8 or less”)

Question 25

What will the print when this Python code is run?
if True:
print(“This one is correct”)

Answer 25

This one is correct (the if statement is True)

Question 26

What will the print when this Python code is run?
value = 5
if value == 5:
print(“This one is correct”)

Answer 26

This one is correct (the if statement checks whether value is 5 and it is so this is true)

Question 27

What will the print when this Python code is run?
value = 5
if value = 5:
print(“This one is correct”)

Answer 27

An error message will print as the line
if value = 5:
is trying to assign the number 5 to value NOT check whether value is 5. This is neither True nor False so the if statement cannot work

Question 28

What will the print when this Python code is run?
value = 5
if value is 5:
print(“This one is correct”)

Answer 28

This one is correct

Question 29

What happens when the following lines of code are run?
for number in range(2, 7):
print(number)

Answer 29

The following will print on screen:
2
3
4
5
6

Question 30

How is a comment written in Python?

Answer 30

using a 'hash symbol' at the front e.g.
# this is a comment

Question 31

Why are comments used in programming languages like Python?

Answer 31

They are lines that the computer does not try to run. They are used to help people (usually the programmer) understand what the code does.

Question 32

What prints out when the following code is run?

print(“This is a string”, “and this is another string”)

Answer 32

This is a string and this is another string (there is a space between string & and)

Question 33

What prints out when the following code is run?

print(“This is a string” + “and this is another string”)

Answer 33

This is a stringand this is another string (no space is put between string & and)