helps to maximise code efficiency, and minimise errors.

Steps of thinking ahead

The first step to making a program is to determine the inputs and outputs. Starting by deciding the end goal (outputs), then backtracking to the inputs, is often easier. - It is also important to work out the processes

conditions that already exist + could affect how you devise a solution to a problem

instructions/data retrieved from secondary storage + placed into main memory (often remain there in case needed again, resulting in faster retrieval times) Useful for reducing amount of similar communication between 2 devices exchanging information

data being requested from main memory before it is actually required. Algorithms predict what instructions or data pieces will be needed soon and transfer them to registers.

These algorithms can be hard to implement, and if they are wrong the data has to be removed/flushed

Reusable Program Components

When writing a program, it is useful to consider what can be reused from other solutions, if you can write a subprogram that can then be reused later on, or if there is a library that has the code you are trying to write.

Reusable Program Components pros

Shortens development time Saves system resources Reduces redundant code

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2.1.2

Question	Answer
Thinking ahead	helps to maximise code efficiency, and minimise errors.
Steps of thinking ahead	The first step to making a program is to determine the inputs and outputs. Starting by deciding the end goal (outputs), then backtracking to the inputs, is often easier. - It is also important to work out the processes
Preconditions	conditions that already exist + could affect how you devise a solution to a problem
Caching	instructions/data retrieved from secondary storage + placed into main memory (often remain there in case needed again, resulting in faster retrieval times) Useful for reducing amount of similar communication between 2 devices exchanging information
Prefetching	data being requested from main memory before it is actually required. Algorithms predict what instructions or data pieces will be needed soon and transfer them to registers.
Prefetching cons	These algorithms can be hard to implement, and if they are wrong the data has to be removed/flushed
Reusable Program Components	When writing a program, it is useful to consider what can be reused from other solutions, if you can write a subprogram that can then be reused later on, or if there is a library that has the code you are trying to write.
Reusable Program Components pros	Shortens development time Saves system resources Reduces redundant code

Created by: FlashCardFun!

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