Week 1 - Ruby Introduction

Question 1

Keywords

Answer 1

Words which have specific meaning or complete a special function in a programming language.

Question 2

def

Answer 2

Used to define a method

Question 3

end

Answer 3

Closes off the defintion of a method

Question 4

What does calling a method mean?

Answer 4

Executes the method (things between def and end)

Question 5

print

Answer 5

Prints a string of data, and doesn’t add a new line after executing.

Question 6

puts

Answer 6

Prints a string of data, and adds a new line after executing.

Question 7

gets

Answer 7

Requests a string of data to be used. (Enter your name here: )

Question 8

String

Answer 8

A line of characters stored within quotations “…”

Question 9

Integers

Answer 9

Whole numbers

Question 10

Real/Float

Answer 10

Floating decimal point numbers

Question 11

Booleans

Answer 11

True or false

Question 12

Variables

Answer 12

A piece of data that we declare and is part of the computer’s memory which can be called on later.

Question 13

Constant

Answer 13

A given value which will never change throughout the code

Question 14

+ Signs

Answer 14

They are based on the context of data.

Can represent addition if there are integers.

Can also represent putting 2 strings together if strings.

Question 15

Logic Error

Answer 15

An error made often due to typos

Question 16

Syntax Error

Answer 16

An error made due to not following the rules of the programming language.

Eg: not including ‘ ‘ for print

Question 17

Global Variable

Answer 17

A variable declared outside of a method, meaning that it can be called in any method.

Question 18

Local Variable

Answer 18

A variable declared inside of a method (between def and end) and can only be used inside of that method.

Question 19

Compiler

Answer 19

The program which runs the code

Question 20

gets.chomp

Answer 20

Removes (chomps) any white space when requesting a string of info.

Question 21

Pseudocode

Answer 21

Using the English language to explain what you want the code to do.

Question 22

Statements

Answer 22

Just lines of code

Question 23

Expression

Answer 23

Anything that can be evaluated to give a value.

Eg: 5+2 = 7, ‘Hello’ + ‘World’ = Hello World