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Learning objective

Students should be familiar with and comprehend various aspects of design, including file and data structures, input and output formats, and validation processes. This encompasses understanding file structures such as field length, field name, data type, and coding conventions (e.g., M for male, F for female). They should also grasp validation routines like range checks, character checks, length checks, type checks, format checks, presence checks, and check digits. Additionally, students should know about input formats such as data capture forms and output formats including screen layouts and report layouts.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE Information and Communication TechnologyThe systems life cycle

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Quick explanation

Students should be familiar with and comprehend various aspects of design, including file and data structures, input and output formats, and validation processes. This encompasses understanding file structures such as field length, field name, data type, and coding conventions (e.g., M for male, F for female). They should also grasp validation routines like range checks, character checks, length checks, type checks, format checks, presence checks, and check digits. Additionally, students should know about input formats such as data capture forms and output formats including screen layouts and report layouts

  • This point belongs to Design, especially Design outcomes.
  • You need to be able to students should be familiar with and comprehend various aspects of design, including file and data structures, input and output formats, and validation processes. This encompasses understanding file structures such as field length, field name, data type, and coding conventions (e.g., M for male, F for female). They should also grasp validation routines like range checks, character checks, length checks, type checks, format checks, presence checks, and check digits. Additionally, students should know about input formats such as data capture forms and output formats including screen layouts and report layouts.
  • The key ideas to know are Define, Describe, and Explain.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DefineDescribeExplainIdentify

Why it matters

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Paper 1 structured question: Design

Paper 1Theory6 marks

Description

File Structure Example

A student database includes fields such as Student ID, Name, Gender, and Age. The Gender field uses coding conventions where 'M' represents male and 'F' represents female.

Field NameData TypeField LengthCoding Convention
Student IDNumeric6None
NameText30None
GenderText1M/F
AgeNumeric2None
  1. a

    Define Define what is meant by a 'coding convention' in the context of the Gender field.

    Aim for approximately 2 distinct marking points.

    [2]
  2. b

    Explain Explain two validation checks that could be used for the Age field.

    Aim for approximately 4 distinct marking points.

    [4]
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