Python Coding

Question 1

What type of language is python?

Answer 1

High-level programming language. Easy for humans to read, write and maintain but code is slower to run.

Question 2

What is a statement?

Answer 2

Complete computer command.

Question 3

What does an expression do?

Answer 3

Evaluates to the new value. e.g. 2*2

Question 4

What does the function print() do?

Answer 4

Outputs and displays text in terminal.

Question 5

What do variables do?

Answer 5

Stores values (not expressions) using assignment operator =. Variable names should describe stored data.

Question 6

What are the different data types variables can store?

Answer 6

Int (whole no.), floats (decimal no.), strings (text)

Question 7

What is the symbol and advantage of using multi-line strings?

Answer 7

”””
Anything between the “triple quotes” is part of the string including quotes, new lines and tab.
“””

Question 8

What is a string concatenation?

Answer 8

Combing string values using the + symbol (joins w/o spaces).

Question 9

What is the function of input()?

Answer 9

Assign user value as a variable. Prompt message printed beforehand.

Question 10

What type of data is user input and what are some problems that may arise?

Answer 10

User input is entered as strings, therefore, calculations cannot be made. Must be converted to int.

Question 11

What is the control flow and what does it allow us to do?

Answer 11

The sequence in which a program’s code is executed is regulated by conditional statements, functions and loops. Allows alternative courses of action to be taken depending on the occurrence of an event.

Question 12

What is a Boolean expression?

Answer 12

A statement that is true or false (whether or not it’s a fact).

Question 13

What is an if statement used for?

Answer 13

Simple decisions.

Question 14

What is an if-else statement used for?

Answer 14

Two-way decisions that describe what we want to happen if condition(s) are not met.

Question 15

What is an if-elif-else statement used for?

Answer 15

Multi-way decisions that check for another condition after the statement.

Question 16

What is a for loop used for and how do you write it?

Answer 16

Iterating a sequence; counting loops.
for (variable name) in range():

Question 17

What is the break statement?

Answer 17

Used to leave loops early and jump to the next line of code outside the loop.

Question 18

What is a library/module and how do you implement it into your code?

Answer 18

Built-in/pre-written functions to use in programs, called upon by “import”.

Question 18

What is a library/module and how do you implement it into your code?

Answer 18

Built-in/pre-written functions to use in programs, called upon by “import”.

Question 19

How to convert between different data types e.g. strings to numbers and numbers to strings?

Answer 19

int() or str()

Question 20

What are lists, how do you write them and how are they different from strings?

Answer 20

A collection of data (strings, numbers or a mixture of both) in sequential order. Variable.name = [] (square brackets). They are mutable (changeable values) and can remain empty.

Question 21

What is a method in Python listing and how would you write it?

Answer 21

Built-in functionality to create, manipulate or delete data. Listname.method()

Question 22

What does the append method do?

Answer 22

Add an element onto the end of the list.

Question 23

What is an index in a list and how do you write it?

Answer 23

The location of an element in a list. Python is zero-indexed. List.name[]. The negative index is the last element on the list.

Question 24

How to change a value in a list?