Topic 1 - Session 1 - MTA Intro Course

Question 1

Describe three core aspects of defining a variable

Answer 1

1. Variables cannot have spaces in their names
2. Variables are case-sensitive
3. Variables cannot begin with a number

Question 2

Which type of variable use decimals?

Answer 2

Floating

Question 3

Describe what a variable is in simple terms

Answer 3

A variable is a container that can be used to store information which can be used later.

Question 4

When declaring variables in python, what is best practice?

Answer 4

It is best practice to use camel casing.

Question 5

What punctuation symbol should we use to combine strings and numbers in a print statement?

Answer 5

A comma

Explanation:
A comma removes the need to convert the integer to a string.

Question 6

How many values does a Boolean variable have?

Answer 6

Two values - either True or False

Question 7

What is ‘\n’ called and what does it do?

Answer 7

It is called an escape character and it is used to send text to a new line.

Question 8

Are Boolean values case sensitive?

Answer 8

Yes, the values can only be either True or False

Question 9

What is type casting in Python?

Answer 9

This is when you convert a integer or a float value into a string

str(variable_name)

Question 10

When converting a float to an integer, what must you keep in mind?

Answer 10

The casting will result in the float number being rounded down.

Question 11

Lists are known as what in other programming languages?

Answer 11

Arrays

Question 12

Lists use what type of brackets?

Answer 12

Square brackets

list = [ ‘dog’ ]

Question 13

How would you add a new value to the end of this list?

list = [ ‘dog’ ]

Answer 13

list.append(‘cat’)

Question 14

How would you remove a value from a list?

Answer 14

list.remove(‘dog’)

Question 15

How would you sort a list in alphabetical order?

Answer 15

list.sort()

Question 16

Instead of using list.append to add a value to the end of a list, what other command could be used?

Answer 16

list[-1] = ‘bat’

Note: This will replace the existing last value in the list.

Question 17

What is the difference between a single equals sign and a double equals sign?

Answer 17

1. A single equals sign is known as an assignment

2. A double equals sign is asking whether something is equal

Question 18

Name the three logical operators

Answer 18

and
or
not

Question 19

When you use the ‘and’ logical operator, what is the logic being asked?

Answer 19

This means both sides of the statement must be true.

a == c and b != c

Question 20

When you use the ‘or’ logical operator, what is the logic being asked?

Answer 20

This means that only one side of the statement must be true.

Question 21

When you use the ‘not’ logical operator, what is the logic being asked?

Answer 21

This means that statements are checked for the opposite.

Question 22

In python, what does the percentage sign % do?

Answer 22

It is used for modulus which is used to find a remainder after a division.

Question 23

What does this mean in python

8 ** 3

Answer 23

** means exponent, other known as 8 raised to the power of 3

Question 24

What is the identity operator do?

Answer 24

This is used to determine if two variables have the same ID.

Question 25

What is the containment operator?

Answer 25

It is either ‘in’ or ‘not in’

It is used to determine if a list does or does not contain something.