← Computer Science syllabus

ScotlandComputer Science

Area 1: Software Design and Development

8 dot points across 8 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

How do you turn a vague problem into a precise statement of what a program must do?

The analysis stage: identifying the purpose, scope, boundaries and functional requirements of a problem to produce a requirements specification.
An SQA Higher Computing Science answer on the analysis stage of software development, covering the purpose, scope, boundaries and functional requirements that make up a clear software specification.
10 min answer →

What are the building blocks of program logic, and how do sub-programs share data?

Computational constructs: assignment and arithmetic, selection with logical operators, fixed and conditional iteration, pre-defined functions, and sub-programs with parameter passing (by value and by reference) and variable scope.
An SQA Higher Computing Science answer on computational constructs, covering assignment and arithmetic, selection with logical operators, fixed and conditional loops, pre-defined functions, sub-programs, parameter passing by value and by reference, and local and global scope.
12 min answer →

How does a program store single values and whole collections of data?

Data types and structures: variables of simple types, 1-D arrays, records, and parallel arrays or arrays of records, with string operations.
An SQA Higher Computing Science answer on data types and structures, covering simple variable types, 1-D arrays, records, parallel arrays and arrays of records, plus string operations such as concatenation.
11 min answer →

How do you plan the structure and logic of a program before writing any code?

Design notations used to describe a solution: structure diagrams, flowcharts and pseudocode, and the design of the user interface (wireframes).
An SQA Higher Computing Science answer on design notations, covering structure diagrams, flowcharts and pseudocode for program logic, and wireframes for user-interface design.
11 min answer →

How is software developed in stages, and how do iterative and agile approaches differ from the traditional waterfall process?

The iterative software development process (analysis, design, implementation, testing, documentation and evaluation) and the difference between the traditional waterfall approach and agile methodologies.
An SQA Higher Computing Science answer on the software development process, covering the seven iterative stages from analysis to maintenance, and the difference between the traditional waterfall model and agile methodologies.
11 min answer →

What standard patterns solve the most common data-processing problems?

Standard algorithms: input validation, running total within a loop, traversing a 1-D array, linear search, counting occurrences, and finding the minimum or maximum.
An SQA Higher Computing Science answer on the standard algorithms, covering input validation, running totals, traversing a 1-D array, linear search, counting occurrences, and finding the minimum or maximum value.
12 min answer →

How do you find errors in a program and judge whether it is any good?

Testing with normal, extreme and exceptional test data; syntax, execution and logic errors; debugging techniques; and evaluating software for fitness for purpose, efficiency, robustness and readability.
An SQA Higher Computing Science answer on testing and evaluation, covering normal, extreme and exceptional test data, the three error types, debugging techniques, and evaluating software for fitness for purpose, efficiency, robustness and readability.
11 min answer →

What does the Higher Computing Science assignment require, and how is it marked?

The course assignment: practical tasks worth 40 marks that apply the analysis, design, implementation, testing and evaluation skills to software and to either a database or a website.
An SQA Higher Computing Science overview of the course assignment, the 40-mark practical coursework that applies analysis, design, implementation, testing and evaluation to a software task and to either a database or a website task.
9 min answer →