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Mock Exam March (1.6 Systems Software ((Threat - A potential danger,…
Mock Exam March
1.6 Systems Software
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Distributed Denial of Service - A network attack which stops users from accessing a part of a network or website
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SQL injection - A piece of SQL code which can be typed into an input box to try and attack the SQL database
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Network forensics - Investigations that organisations undertake to find the cause of attacks on their network
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User access levels - Controls which files or areas of a network different groups of users can access
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2.1 Algorithms
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Computational thinking - Using abstraction - decomposition and algorithmic thinking to solve a problem
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Binary search - A search algorithm where we compare the middle item - discard unnecessary information - and repeat
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Linear search - A search algorithm starting at the first item until it finds the desired item or the end of the list
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Bubble sort - A sort algorithm which starts at the left and compares items one by one moving to the right swapping
Merge sort - A sort algorithm which splits a list into individual items and merges them into an ordered list
Insertion sort - A sort algorithm where the next unordered item is inserted into its correct place in an ordered list
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1.7 Systems Software
Operating system - Software responsible for managing hardware - applications - users - and resources of a computer
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User management - The system enabling multiple people to use a computer with their own files and rights
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Defragmentation - Reorganising data in a hard drive to put separated files back together to free up space
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Backup - A copy of your files and settings of your computer so that it can be restored in the event of an error
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2.4 Computional Logic
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Logic gate - An electronic circuit component that performs a Boolean operation (e.g. AND - OR or NOT)
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Truth table - A table listing all possible binary inputs through a logic circuit - to find the outputs
AND gate - A logic gate with two inputs where the output will only be on if both of the inputs are on
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