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23 Cards in this Set
- Front
- Back
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What are the Design Tools?
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Data Dictionary, Pseudocode, Data Structure Diagrams (DSDs), Object Descriptions, Use Cases,
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What is a Data Dictionary?
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Lists all the variables that are being used (or that are going to be used) in the program)
Includes their Name, Type, Size, Scope, and Description |
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What is Pseudocode?
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Structured English that is used to outline what the program will do with the data to produce the necessary functionality.
It is NOT considered a programming language |
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What is a Data Structure Diagram? (DSD)
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Used to represent entities within the program and how each relate with each other.
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What are Object Descriptions?
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Help plan the structure and content of the objects that will be used in the solution.
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What are Use Cases?
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Help an external observer visualise what the system does
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What is Syntax?
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Refers to the rules that are followed in a programming language.
It defines symbols, words and structures that must be used in order for the compiling application to understand the program that has been written |
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What are Object Oriented Languages?
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Refers to programming languages that centre around objects.
Objects include buttons, text boxes, labels and images. When the user interacts with an object, sections of the code are activated. |
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What are Procedures?
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Also known as subroutines, functions or methods.
They make the program code more readable by breaking it up into sections. It's a self contained code that performs an action, and allows a large program to be divided up between various programmers |
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What are Parameters?
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Values or references that a procedure uses.
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What are Methods and Events?
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Events refer to things that happen to an object that are triggered by the user or by another object
Methods refer to commands that interact with the object directly to alter their behaviour. |
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What are the Control Structures?
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Sequence, Selection, and Iteration
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What is Internal Documentation?
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Can be used to explain a procedure or variables.
It also assists programmers to understand what the code is expected to do. |
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Storage Size of an Integer
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4 bytes
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Storage Size of a Character
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1 byte
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Storage Size of a String
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Varies
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Storage Size of a Boolean
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1 byte
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Storage Size of a Floating Point
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12 bytes
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Main advantage of using Procedures?
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They allow various parts of a program to call the same code therefore allowing reuse of the same code- therefore reducing duplication
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Three conventions that should be followed when naming elements
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1. The name should reflect the type of element
2. It should describe the purpose of the element, 3. Should not have any spaces |
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Difference between a Method and an Event
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A method alters the behaviour of an object while an event is when a user interacts with the object.
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Difference between a Stack and a Queue
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A stack is based on the First In Last Out (FILO) principle, while a queue is based on the First In First Out principle (FIFO)
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Why is it important to consider the size of the data type considered?
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As there could be wasted space, due to how the data type selected will set aside/take up the required amount of storage needed, even if it's not using all that space.
It impacts the efficiency of the program. |
