Chapter 1 - Algorithms

Question 1

What is an algorithm?

Answer 1

A step by step procedure for solving problems

Question 2

What is a list algorithm?

Answer 2

Instructions written in order

Question 3

What is an iteration

Answer 3

Repeating something a set number of tines or until a condition is met

Question 4

What is a selection?

Answer 4

A choice or decision

Question 5

What is a sequence?

Answer 5

A basic instruction

Question 6

Is “tip 4 large eggs whites into a mixing bowl” a sequence iteration or selection?

Answer 6

Sequence because it is a basic instruction

Question 7

Is “ keep beating until mixture stands up in stiff peaks” a sequence iteration or selection?

Answer 7

Selection and iteration because its a decision and is repeating until condition met

Question 8

What is correctness?

Answer 8

How successful it solves the problem

Question 9

What is efficiency?

Answer 9

How quickly it solves the problem

Question 10

What is a flow diagram?

Answer 10

Instructions that are written in boxes connected with arrows and pseudo code, where the programmer prepares to write the final script in a code-like language.

Question 11

What shape is start and end boxes?

Answer 11

An oval

Question 12

What shape is the simple sequence instruction?

Answer 12

A rectangle

Question 13

What shape is a user inputs and outputs in a flow diagram?

Answer 13

Rhombus

Question 14

What shape is selections?

Answer 14

Diamond

Question 15

Selections have what two options

Answer 15

Yes and no

Question 16

An algorithm diagram is also called what?

Answer 16

Flow diagrams

Question 17

What is a selection statement?

Answer 17

A decision is made, leading to one of 2 alternative actions

Question 18

What is a process

Answer 18

The action that is taken as a result of a decision

Question 19

What does authenticate mean?

Answer 19

Confirms that a users username and password match the data stored on record

Question 20

What is a variable?

Answer 20

A container which is used to store data, e.g. numbers or text

Question 21

What is a constant?

Answer 21

Data that does not change throughout the script

Question 22

Example of camel-case?

Answer 22

boyAge
girlHeight

Question 23

Example of Snake-Case

Answer 23

Boy_age
Girl_height

Question 24

What are 2 variable identifiers?

Answer 24

Snake-case
Camel-case

Question 25

What are 6 rules for identifiers?

Answer 25

-No spaces -not start with number -descriptive -not too long -not a keyword -Camel-Case or Snake-Case

Question 26

What is pseudo-code?

Answer 26

A language that is similar to a real programming language but is easier to understand. It allows you o plan your script and get the layout and structure right, before coding it for real.

Question 27

What is an operand?

Answer 27

The data the operators work on

Question 28

What is the operator?

Answer 28

The symbol that tells the computer what to do

Question 29

What does + do?

Answer 29

Adds 2 numbers together

Question 30

What does - do?

Answer 30

Subtracts 1 number from another

Question 31

What does * do?

Answer 31

Multiplies 2 numbers together

Question 32

What does / do?

Answer 32

Quotient - divide 1 number by another with decimal

Question 33

What does // or DIV mean?

Answer 33

Quotient - divide 1 number by another ignoring decimal

Question 34

What does MOD or % mean?

Answer 34

Modulus - the remainder when 1 number is divided by another

Question 35

What does ^ or ** mean?

Answer 35

Power - 1 number to the power of another

Question 36

What does = or == mean?

Answer 36

Checks to see if one operand is the same as another

Question 37

What does != mean?

Answer 37

Checks to see if one operand is not the same as another

Question 38

What does < mean

Answer 38

Checks to see if one operand is less than another.

Question 39

What does > mean?

Answer 39

Checks to see if one operand is greater than another.

Question 40

What does <= mean

Answer 40

Checks to see if one operand is less than or equal to another

Question 41

What does >= mean?

Answer 41

Checks to see if one operand is greater than or equal to another

Question 42

What does AND mean?

Answer 42

Checks to see if the first condition statement AND the second is true

Question 43

What does or mean?

Answer 43

Checks to see if the first condition statement or second is true

Question 44

What does Not or != mean?

Answer 44

Checks to see if a condition statement is NOT true

Question 45

Give an example of relational operators

Answer 45

- = == - != - < - > - <= - >=

Question 46

Give an example of Boolean logic operators are

Answer 46

- AND - or - not

Question 47

Give an example of Arithmetic operators

Answer 47

- + - - - * - / - DIV // - MOD % - ^ **