COMPUTER SCIENCE
(NUMBER 2)
(2ai)
firmware is a specific class of computer software that provides the low - level control for the device's specific hardware .
Firmware is held in non -volatile memory devices such as ROM , EPROM , or flash memory.
(2aii)
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.
(2b)
(Pick four)
(i)Hard drive
(ii)Solid-state drive
(iii)USB thumb drive
(iv)SD card
(v)CD
(vi)DVD
(2c)
In tabular form
(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
*(3a)*
(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 5e 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.
*(3aii)*
(i)Memory Address Register(MAR)
(ii)Accumulator register
*(3aiii)*
Accumulator register:-This register is used for shoring the results that are produced by the system. when the CPU will generate some results after the processing then all the results will be stored into the AC register
*(3bi)*
ASCII stand for American Standard Code for Information Interchange
*(3bii)*
BCD stands for Binary -coded decimal
*NO. 4*
*(2nd ALTERNATIVE)*
*4ai )*
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.
*4bi )*
_Design theme_
This 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 .
*4bii)*
_slide sorter_
This displays all the slides in your presentation in horizontally. it also provide the user with the ability to select several slide at one time
*4ci )*
4328 +7658 = 14178
*4cii )*
21468 +438 = 22118
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