Reliability

Reliability is the quality of being dependable or trustworthy. Reliability is crucial in everyday life, unreliable systems can cause disaster. Reliability is important in all things: systems, banking industries need reliability as they store personal data and information about thousands of people, if they didn't have strong reliability money from banks would be lost, stored images on systems would be lost. All things have reliability, or else we wouldn't be able to save images, travel, communicate or live routine. We depend on phones for communication, alarms, to take and store images that can be viewed many times over. If our phone broke we would have no alarm therefore be late, no communication and all images would be lost.

To improve reliability, all companies and businesses should use hardware and data redundancy. Hardware redundancy is a process of physical back up to do with power, where as data redundancy backs up all data and information, saving files and making the best possible uses of storage.

 - Hardware redundancy would be used in aeroplanes. life and death, There are four engines in a plane if one breaks, the other three will adapt so the plane can still fly.  
- Data redundancy can be the turning on and off of your computer if you continued to do so if would soon beak.

Week One

The first week of OCR Computing began with an introduction to key terms; "what is a computer?" I now know its a device that can input, store, manage and output data, a calculator.
In more depth, I learnt about Binary code and ASCII table. Binary is the code a computer uses to calculate and display letters on the output (e.g a computer screen). To work out binary its simply many 0's and 1's placed into the binary table and added up:

128	64	32	16	8	4	2	1
0	1	1	0	0	0	1	1

To work it out you simply add up all the numbers displayed by 1's;  the above adds to 99 and corresponds to letter C in the ASCII table.

So:
A computer is a device that process, inputs, stores, manage and outputs data.

The Binary table headings are easily remember by simply doubling the amount each time from right to left. 128, 64, 32, 16, 8, 4, 2, 1.

    

Introduction

I am currently studying Compter Science, following the OCR Computing GCSE, which will take two years. I have made this blog and will be using it to post my work, giving updates on what I have learnt each week.