OTS Unit 1 (Intro, S1)

What three building blocks are used when designing algorithms?

• Sequencing, programming, iteration

• Sequencing, selection, iteration

• Sequencing, selection, programming

What is sequencing?

• The order in which steps are carried out in an algorithm

• The order in which we think computationally

• The process of repeating a number of steps in an algorithm

Why is sequencing important?

• To ensure the algorithm is kept to a reasonable length

• To ensure the algorithm functions as intended

• 
  To ensure the algorithm is efficient

What might happen if the sequence is wrong?

• The algorithm may be overly long

• The algorithm may be inefficient

• The algorithm may produce unexpected results

Reorder the following sequence to make a cup of tea?

• Add water to kettle

• Boil water

• Add hot water to cup

Reorder the following sequence for making jam on toast

• Remove toast when done

• Spread butter on toast

• Put bread in toaster

• Spread jam on toast

What is a procedure?

• A set of iterated statements

• A small section of code within a program which performs a task

• A decision point in a program

Why are procedures used?

• To make code more readable

• To reduce repetition of code

• To calculate values

What is the difference between a procedure and a function?

• A procedure produces a calculated result whereas a function performs a task

• 
  A procedure iterates code whereas a function is a decision point

• A procedure performs a task whereas a function produces a calculated result

Detecting user interaction can be used by clicking object and _____________?