2.1.2 - Designing, creating and refining algos

Question 1

Advantages of pseudocode

Answer 1

• Doesn’t matter if there are syntax errors as it doesn’t follow programming language syntax
• Easily converted into a real programming language as it is generic
• Easily understandable even for non-programmers
• Easy to make changes to the design

Question 2

What is an algorithm

Answer 2

A sequence of logical instruction used to solve a problem. Starting point before a program

Question 3

Use of trace tables

Answer 3

Used to show how variables change during the execution of a program

Question 4

Two types of algorithms

Answer 4

• Pseudocode
• Flow charts

Question 5

Advantages and disadvantages of flowcharts

Answer 5

• Advantages - international standard, easy to see how it flows
• Disadvantages - not easy to make changes at it has to be redrawn, can be massive for big programs

Question 6

What does an oval represent in a flowchart

Answer 6

Start/End

Question 7

What does a rectangle represent in a flow chart

Answer 7

Process done by the program - any calculations for example

Question 8

What does a diamond represent ina flow chart

Answer 8

A decision ( yes or no) has two separate paths coming from it

Question 9

What does a parallelogram represent in a flow chart

Answer 9

An input or an output

Question 10

Shape that represents a subroutine in a flowchart

Answer 10

Rectangle with extra short lines inside it

Question 11

Defenition of pseudocode

Answer 11

English language structured like programming language code - simplified code