NECO – Computer- ANSWER

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COMPUTER- Obj- ANSWERS
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COMPUTER- THEORY – ANSWERS
3 ai)
i ) Protocol. Different protocols can affect the transfer rates by bottle necking the drive . For example , a solid state drive on IDE is a really bad idea because the maximum speed of IDE is just over 120 MB/ s . Sometimes slower for the slave drive .
ii) Length of cable. A Cat 5 e cable at over 50m ( tested) will only transfer 100 MB/ s . I ’ve seen shorter cables that can reach 1 GB/ s .
iii ) Busy system . A system at full CPU load may not receive as fast as the device can send .
iv ) Drive capacity . For flash storage devices ( Solid state drives) , the fuller they are , the slower they get.
v ) Age . Solid state drives, CDs , and some other media get slower as the years pass . Or maybe just in comparison to that new hard drive you bought.
3 aii )
i ) Memory Data Register ( MDR )
ii) Data Register
3 aiii)
Data Register – is a register used in microcomputers to temporarily store data being transmitted to or from a peripheral device .
3 bi)
ASCII – ( American Standard Code for Information Interchange ) is the most common format for text files in computers and on the Internet . In an ASCII file , each alphabetic , numeric , or special character is represented with a 7 – bit binary number
3 bii )
BCD – ( binary coded decimal ) ( BCD ) is a type of binary representation for decimal values where each digit is represented by a fixed number of binary bits , usually between four and eight.
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2 ai)
firmware is a specific class of computer software that provides the low – level control for the device ‘ s specific hardware . In Other Words Firmware is held in non – volatile memory devices such as ROM , EPROM , or flash memory .
2 aii )
Proprietary software is software that is owned by an individual or a company ( usually the one that developed it ) . There are almost always major restrictions on its use, and its source code is almost always kept secret .
2 b )
i ) Hard drive
ii) Solid – state drive
iii ) USB thumb drive
iv ) SD card
2 c )
– tabulate –
i ) Magnetic storage device Stores data in magnetic form .
While
Optical storage device stores data optically and use laser to read/ write
ii) Magnetic storage device has high storage capacity
While
Optical storage device has less storage than hardisk
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4 a )
presentation package is a software package used to display information in the form of a slide show. It has three major functions : an editor that allows text to be inserted and formatted , a method for inserting and manipulating graphic images , and a slide – show system to display the content .
4 aii )
i ) Slide notes
ii) slide master
iii ) transition
iv ) animation
4 bi)
Design theme- is a preset package containing graphical appearance details. A Design theme usually comprises a set of shapes and colors for the graphical control elements, the window decoration and the window .
4 bii )
slide sorter – displays all the, slides in your presentation in horizontally . it also provide the, user with the ability to select several slide at one time
4 ci )
4328+ 7658= 14178
4 cii )
21468 + 438 = 22118
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1 ai)
CLICK HERE FOR THE STRUCTURE AND DIAGRAM
1 aii )
Individual database fields
1 b )
i ) Keep software up to date
ii) Beware of error messages
iii ) Validate on both sides
iv ) Avoid file uploads
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