Algorithm design and problem solving (paper2)

Question 1

What are the 4 stages of the program development life cycle?

Answer 1

-Analysis
-Design
-Coding
-Testing

Question 2

What is the analysis stage?

Answer 2

Abstraction, decomposition of the problem, identification of the problem and the requirements

Question 3

What is the design stage?

Answer 3

Decomposition, structure diagrams, flowcharts, pseudocode

Question 4

What is the coding stage?

Answer 4

Writing the program code and iterative testing

Question 5

What is the testing stage?

Answer 5

Testing the program code with the use of test data

Question 6

What is abstraction?

Answer 6

Abstraction involves identifying the key parts of the problem and removing any unnecessary detail so it becomes easier to solve

Question 7

What is decomposition?

Answer 7

Decomposition means breaking down a complex problem into smaller, manageable parts which are easier to solve

Question 8

What are the 3 types of error?

Answer 8

-Syntax error
-Logic error
-Runtime error

Question 9

What is a syntax error?

Answer 9

An error caused by a spelling or grammar mistake

Question 10

What is a logic error?

Answer 10

An error where the program still runs but the output may be incorrect for example a > symbol rather than a < symbol

Question 11

What is a runtime error?

Answer 11

An error that is detected whilst the program is still running. A division by zero will cause a runtime error