SQA Higher Computing Science Software Design and Development overview quiz quiz

Design

Implementation

Analysis

Evaluation

Because developers move back to earlier stages when a later stage reveals a problem

Because each stage is completed exactly once and never revisited

Because the code is written before the design is started

Because only one developer ever works on the project at a time

The waterfall model

Top-down design

A structure diagram

Agile

The program should be user-friendly

The user can enter a book's barcode to record a loan

The program should run quickly

The program should look modern

The exact line-by-line program code

The colours and fonts of the user interface

A top-down hierarchy of the problem broken into sub-problems

The flow of control using diamonds and arrows

An array of records

A single Boolean variable

Two parallel arrays indexed in step

A single integer

Ada Lovelace

Lovelace Ada

An error

AdaLovelace

A fixed loop, because the number of attempts is known

A conditional loop, because the number of attempts is not known in advance

No loop is needed for this task

A fixed loop that always runs exactly three times

It is unchanged, because only a copy is sent into the sub-program

It is always set to zero by the sub-program

It is changed by any update made inside the sub-program

It is deleted once the sub-program finishes

Inside the loop, so it resets each iteration

After the loop has finished running

Once, before the loop starts

It does not need to be initialised at all

To count how many elements are in the array

To record whether the target has been found and allow the loop to stop early

To store the largest value in the array

To convert the array into a record

A logic error

An execution (runtime) error

A rounding error in a calculation

A syntax error

The first element of the array

Zero, regardless of the data

The size of the array

Negative one

Normal data

Exceptional data

Extreme data

Random data

How quickly the program runs on the processor

Whether the code is clear, with meaningful names, comments and indentation

Whether the program rejects invalid input without crashing

Whether the program meets every functional requirement

It sorts the array into ascending order first

It adds each element's value to an accumulator

It searches for a single target value and stops

It adds one to a counter only when a condition is true