Problem solving: Unit 4

Question 1

What is computational thinking?

Answer 1

• the thought processes involved in formulating problems and their solutions so that the solutions are represented in a form that can be effectively carried out by a computer.

Question 2

What are 3 skills required for computational thinking?

Answer 2

• Algorithm design
• Decomposition
• Abstraction

Question 3

What is decomposition?

Answer 3

Decomposition is breaking a problem down into smaller, more manageable parts, which are then easier to solve.

Question 4

What is Abstraction?

Answer 4

Abstraction is the process of removing or hiding unnecessary detail so that only the important points remain.

Question 5

What is the benefit of decomposition?

Answer 5

• Saves a lot of time
• Easier to spot and correct errors.
• can easily copy and reuse useful chunks of code for other programs.

Question 6

Abstraction as an example in computers?

Answer 6

• High level» assembly» machine»_space; voltage

Question 7

What are the different levels of abstraction?

Answer 7

• higher details lower the level of abstraction.

Question 8

What are sub-programs?

Answer 8

• a self-contained module of code that performs a specific task. It can be ‘called” by the main program when it is needed.