COMPUTER STUDIES QUESTIONS WITH ANSWERS
What are the DOS commands used for the following?
(a) Changing directories – CD\ (b) Viewing directories – DIR (c) Renaming directories – REN or RENAME (d) Deleting a directory- RD\
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Give two reasons why optical disks are better storage media compared to floppy diskettes (2mks)
Distinguish between formatting a disk and scanning a disk with reference to operating systems.31/12/2020 Distinguish between formatting a disk and scanning a disk with reference to operating systems.
State any two features of a user- friendly program
(a) State two tasks of a processor (2mks)(b) State the functions of I/O devices
Headache, back and neck pain may result from use of computers. State how each of them can be minimised.
Describe each of the following types of computers: hybrid; and embedded.
Define the term Computer Aided Design.
(b) List three advantages of using Computer Aided Design.
What is meant by freeware?
(b) State two ways of acquiring freeware.
Distinguish between the following:CRT and LCD, OCR and OMR.
(a) CRT :- A display unit built around the vacuum tube containing one or more electron guns whose electron beams rapidly sweep horizontally across the inside of the front surface of the tube which is coated with a material that glows when irradiated. WHILE
LCD : - A type of display that uses a liquid compound having a polar molecular structure. sandwiched between two transparent electrodes. When an electric field is applied, the molecules align with the field forming a crystalline arrangement that polarizes the light passing through it. A polarized filter laminated over the electrodes locks polarized light. In this way, a grid of electrodes can selectively tum on” a cell,, or a pixel, containing the liquid crystal material turning it dark. (b) OCR :- Type of scanning technology that reads special pre-printed characters and converts then into computer usable form, while OMR :-Scanning technology that reads pencil marks and converts them into computer usable form. Describe an input device.
(b) Other than scanning devices, name two other input devices.
A computer C directory has folders for form 1, form 2, Form 3 and form 4. Each class has student’s folders labeled according to their number. The students create their own folder for the subject the are studying based on the table shown below
a) Assuming there is one student per class, draw the corresponding directory tree structure.
b) i) a form four student wants to create a folder to store her project. State the path for that project folder. ii) Suggest how the student can ensure that: 1. Work is not lost in case the hard disk fails. 2. The project is not copied by other students. c) i). Other than I/O devices, list other three devices under the control of the operating system. ii) Explain any one of the devices named in C (i) above d) Define the term trouble shooting
RESPONSES
c) i) A form four student wants to create a folder to store to project State the path for flat project folder.
C:\FORM4\STUDNO\ADB\PROJECT ii) Suggest how the student can ensure that: - work is not lost in case the hard disk fails.
e) Define the term trouble shooting
List four factors to be considered when purchasing an operating system.
(a) (i) What is a computer keyboard? (1mk)
Input device with keys for keying in data in the form of characters
List four types of keys found on a computer keyboard. Give an example of each. (4mks)(a) List five precautions that can be taken to protect data stored in diskettes (5mks)Explain the following input/ output terms as used in computer systems. Give an example for each30/12/2020 Explain the following input/ output terms as used in computer systems. Give an example for each (4mks)(a) Read- get data from memory e.g. opening a file
(b) Write – put data into memory e.g. saving List three differences between a microcomputer and a super computer (3mks)Microcomputers
Supercomputers
State four benefits of using a computer in a school library
Some of the storage disk available are: zip disks, 3 ½ inch floppy disks, DVDs and 5 ¼ inch floppy disks. Arrange these devices in ascending order of storage capacity.
List four ways of acquiring software in an organization
Define authenticity as used in software selection
Jane has noticed the following problems in her computer keyboard
a) Disk is fragmented - Defragment the disk by running the defragment utility. "
b) Virus/bug infection - run the antivirus utility c) Capacity of RAM is small- Increase the size by replacing the existing chip with a higher capacity RAM chip. d) Processor speed is low - Replace processor with a high speed processor. State the functions of the following keys on the computer keyboard; Backspace and Insert (ins)29/12/2020 State the functions of the following keys on the computer keyboard; Backspace and Insert (ins)
Describe the computer booting process.
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