Paper 2 Comp Science revision

Which of these is not one of the four basic programming constructs

• Sequence

• Assignment

• Selection

• Repeats

A rectangle shape in a flowchart demonstrates which of the following:

• Start

• Decision

• Assignment or action

• Input

Algorithms usually consist of which three different stages

• Input-Processing-Output

• Input-Calculation-Output

• Input-Validation-Output

• Input-Procedures-Output

What is the purpose of a trace table?

• Dry run an algorithm

• Trace the variables in an algorithm

• For testing purposes

• All of the options are correct

When is a trace table normally conducted?

• During the testing stage

• Post implementation

• During the design of the algorithm

• All stages

Which of the following is likely to have a Boolean data type?

• Creditallowed

• Mileage

• Distance

• Registrationnumber

It is important to use meaningful variable names when programming.

• True

• False

Which of the following is used to implement a selection statement when programming

• IF ELSE

• Case statement

• Pre condition loop

• Post condition loop

What is the correct output from the following pseudocode, when the number 40 is entered:

INPUT mark

IF mark > 40

THEN

OUTPUT "PASS"

ELSE IF mark <40 THEN

OUTPUT "Fail"

• PASS

• FAIL

• No output

• The pseudocode does not indicate an input so the user cannot even enter a mark

Which of the following is not considered a method of iteration

• For loop

• Repeat Until

• While

• Case