COMPUTER STUDIES QUESTIONS WITH ANSWERS
State the purpose of each of the following memories in a computer system. RAM and Hard disk3/1/2021 State the purpose of each of the following memories in a computer system. RAM and Hard disk
(a) RAM
Holds data that is urgently need by the processor, Random-access memory is a form of computer memory that can be read and changed in any order, typically used to store working data and machine code. (b) Hard disk Used to hold large volumes of data that is not urgently required by the processor — also for back up of OS and data.
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State four functions which are specific to Network Operating Systems.
(a) Explain why the following controls should be implemented for computer based systems (2mks)
(b) For each of the following give one reason why they are not allowed in a computer laboratory.
Study the following diagram and answer the questions that follow
From the diagram:
(i) Name two devices that are used for long term storage (ii) Name three peripherals shown on the diagram that are used for input (iii) Name two other devices that a computer Aided Design (CAD) user might wish to add to the set- up above (b)A customer wishes to purchase a computer system. The customer can buy a word processor, spreadsheet, database and a drawing package separately or as an integrated package. State three advantages why many computer users prefer integrated packages to separate packages. (c) (i) An anti- virus software installed in a computer is loaded into the main memory each time the computer is switched on Explain three ways in which computer virus are spread from one computer to another (ii) Give two reasons why an anti virus package should be updated regularly
RESPONSES
(a) (i)ROM
Hard disk 2GB HDD (ii)
To enable remove upcoming viruses/new viruses For maintenance purposes (patches) To upgrade/replace outdated antiviruses. The diagram below shows a layout of a computer network used by a law farm. A workstation and a printer are located in every consulting room
(i) Name the network topology depicted in the diagram
(ii) Name the device labeled D (iii) State four functions of the device labeled ‘server’ (iv) Give two advantages and one disadvantage of the above network design (v) If the firm intends to open extra offices in two different towns, name any three hardware devices that would be required (vi) State any two security problems that might arise by linking the offices in different towns (b) What is spyware?
RESPONSES
(a) (i)Star
(ii) Hub or Switch/Router (iii)File sharing
Advantages .
Name and explain the function of the keyboard keys represented by the following symbols2/1/2021 (a) Name and explain the function of the keyboard keys represented by the following symbols (2mks)
(b) Simulation is one of the application areas of computers(a) Explain what the following DOS commands will do when executed
(i) A: \copy ** B
(b) (i) With the aid of a diagram, explain hierarchical (tree) network topology
A network topology that, from a purely topologies viewpoint, resembles an interconnection of star networks in that individual peripheral nodes are required to transmit to and receive from one other node only, toward a central node, and are not required to act as repeaters or regenerators.
State two health issues that may result from prolonged use of computers
Outline two ways in which computer can be used in hotels (2mks)
(a) State the purpose of registers in a computer system (1mk)To hold data and instructions temporarily as they are being processed in the CPU ( 2mks) (b) Name two multi-programming operating systems (2mks)Windows 9X, Linux, Windows 2000, and Windows NT
(a) What is a disk formatting? (1mk)
To prepare storage medium by defining tracks and sectors where data will be placed in compliance with specific operating system requirements.
(b) Indicate whether the following devices are used for input or output (2mks)
Name two types of buses found on the computer motherboard
(b) State the purpose of each of the types of buses named in (a) above
A school magazine organizes its works in directories. The directory WP contains the files CATS, EXAMS and ASSIGNMENTS. The directory Sp contains the spreadsheet files and the DB directory contains the database files. The directory PROG is contained in the others directory. The directory WP is contained the PERSONAL directory. Given that the directory student contains directories SP, WP, and OTHERS.
(a) Draw the directory tree structure with C as the root
A school has brought a computer system. The hardware items include: 800 MHz processor, 640 MB of RAM, a sound card, speakers, a monitor, a keyboard, a 12 GB hard disk, a floppy disk drive, CDRW drive, a mouse, a modem, an inkjet printer and a joystick. The software supplied includes: an OS, a BASIC interpreter and the following packages: Spreadsheets, graphic, word processor, art database and games.
(a) List three input devices from the given specifications
(a) Explain three ways by which computer users can protect their eyes from harmful emissions from the computer screen
(b) List three factors be considered when deciding on the choice of an electronic data processing method
(a) In DOS, what are the following commands used for?
(b) What happens when the following commands are typed in DOS environment
(a) What is utility software
these are system programs that provide a useful service to the user of the computer by proving facilities for performing tasks of a routine nature
(b) Give four examples of utility software
List 3 differences between laser printer and a dot matrix printerLaser
Dot matrix
A computer teacher put a rule that diskettes should not be used in the computer laboratory(a) Give a reason for the rule
Name four toggle keys on a standard computer keyboard
Explain the following operating systems functions, Job scheduling and Interrupt handling
a) Job scheduling -- where job/ tasks are assigned to the processor and main memory depending on their priority
b) Interrupt handling- halting of other processes taken by the processor so as to attend to remote enquiries or halting a processor for another task to be performed. Name four approaches that may be used to replace a computerized Information system
(b) Which of the approaches named in (a) above is appropriate for critical systems? Explain
With reference to quality of print, noise level and cost, compare a dot matrix with a laser printer31/12/2020 With reference to quality of print, noise level and cost, compare a dot matrix with a laser printerAn operating system organizes files in directories as shown in the chart below.Study it and answer the questions that follow.
(a) (i) What is the name of this file structure?
(ii) One of the files in MISCELLANEOUS has a file name similar to one in CHEMISTRY in Form 1. Describe what happens if all the contents of CHEMISTRY are copied to MISCELLANEOUS. (iii) What will happen if an attempt is made to delete FORM2 while File_10 in MATHEMATICS is open? (iv) State four advantages of this structure. (b) State four properties that an operating system displays about a file. (c)A removable storage media unit connected to a single user microcomputer system is used for permanent storage of programs and data. State six file functions you would expect the operating system of the computer to provide to enable the user to maintain this storage media. (d) State two tasks performed by the operating system in each of the following resources: (i) memory; (ii) input/output devices.
RESPONSES
(a) (i) Hierarchical Structure/Tree structure.
(ii) File 02 and 03 with be replicated in miscellaneous.
(iv)
A computer specification has the following details:
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