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Exam Questions June 2015
Descripción
GCSE Computer Science Mapa Mental sobre Exam Questions June 2015, creado por Joe Anderson el 04/05/2017.
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computer science
gcse
Mapa Mental por
Joe Anderson
, actualizado hace más de 1 año
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Creado por
Joe Anderson
hace alrededor de 7 años
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Resumen del Recurso
Exam Questions June 2015
Number Types
Nibbles is the smallest
Then bits is the next smallest
Then bytes is the next biggest
Then the next largest is kilobyte
ASCII
Character F is represented in binary by 110 0110
Character G is represented in binary by 110 0111
Bitmap
Image which is in black and white which is displayed in 0's and 1's
0's are black
1's are white
Resolution can affect the quality of the picture
Picture quality can be affected by the file type, e.g jpeg due to compression of the file
Programming
Python is a programming language I am familiar with
Data Types
Boolean is True/False
Character is a single character
Real data
String is words joined together within a sentence
Integer is for positive or negative numbers
Data Structures
2D Array
Algorithms
An algorithm is a set of instructions that will return an output
Algorithms 2 could be written better because once it has been matched it stops
Purpose of algorithm 2 is it checks for a specific value
Variables
variables can be labelled 'i' as its an index for the array
The variable 'matched'is to check a specific value
'matched' is a boolean data type
Software Development Life Cycle
Waterfall Model/Waterfall
Stage 1 is Analysis
Stage 2 is Deisgn
Stage 3 Implementation
Stage 4 is Testing
V-Shaped Model
Spiral Model
Incremental Model
The basic model
Prototyping
Advantages
Full-scale testing will crop up any problems the code may have
More robust, will make the code more secure
Gives early insight on future development
Disadvantages
Costs time and money
Less time on the actual code itself
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