Unit 2 Problem solving A level computer science

Which of the following is not done by abstraction?

• Identifies essential details

• Disregards non-essential information

• Breaks the problem down into smaller tasks

Which of the following is not done by decomposition?

• Allows multiple people to work on the problem together

• Disregards non-essential information

• Breaks the problem down into smaller tasks

When drawing a dog, which of the following characteristics is non-essential?

• Dogs have 4 paws

• Dogs have fur

• Dogs can have brown fur

You could use abstraction to replace specific objects with simple shapes

• True

• False

Why do we need to look for patterns in problems?

• Patterns make it easier for us to solve complex problems

• We don't need to look for patterns

• Patterns make it more difficult complex problems

What does the circle symbol mean in a state transition diagram?

• start state

• state

• transition

• end state

What are the three types of errors in programming?

• runtime, syntax, logic

• logic, spelling, operator

• spelling, logic, runtime

• syntax, operator, logic

What does erroneous data mean?

• Data that is right on the edge of being right and wrong

• Data that you expect the user to enter

• Data that you do not expect the user to enter

What is a finite state machine?

• A machine that can do one thing

• Pseudo code that represents an algorithm

• A machine that has a finite amount of things to do

• A representation of how something changes from one state to another

What is functional abstraction?

• Taking out bits of irrelevant detail out of a function

• Using a function, but how it works is on no interest to the user

• Using a function within your program