COMPUTER STUDIES QUESTIONS WITH ANSWERS
Describe each of the following types of computers: hybrid; and embedded.
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A computer system is able to work on both spreadsheet and word-processing documents.Explain how a computer can operate two packages at the same time.
List three ways in which computer technology can be used in law enforcement.
Define the term Computer Aided Design.
(b) List three advantages of using Computer Aided Design.
Describe the term ‘home page’ as applied in the internet.
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 head teacher keeps the following student details in a database: Name,address, Town, Date of Birth, Marks scored, Fees paid.
i) Name the most appropriate primary key. Give a reason
ii) For each item in the student’s details above, indicate its most appropriate data type as used in the database. iii) Explain why input screens are better data entry designs than entering data directly to a table. b) List two career opportunities associated with databases. c) Distinguish between: i) A table in word-processing application and a table in a database application ii) Mouse pointer and insertion point. d) Outline the steps to be followed in order to merge cells in a word processing table.
RESPONSES
i)Name the most appropriate primary key. Give a reason. Name alone is not unique though it is very rare that two or more students will share the same name. ii)For each item in the student's details above, indicate its most appropriate data type as used in the database.
A manager wishes to replace the current manual system with a computerized one
a) Describe three main areas that must be evaluated to justify the replacement
b) List the three areas that would be considered in the requirements specifications. c) State and explain three ways that can be followed to replace the current system
A manager wishes to replace the ctirrent manual system with a computerized one
a) Describe three main areas that must be .evaluated to justify the replacement.
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
Define the following web related terms: Web browser, Hyperlink ,Hypertext document
Define the following web related terms: Web browser, Hyperlink ,Hypertext document
i) Web browser ii) Hyperlink iii) Hypertext document b) List six activities performed on the web c) An institution has ten stand alone computers i) Suggest with reasons the most appropriate topology required to inter-connect the computers. ii) State the necessary steps required to connect the computers to the internet. d) Below is an email address: Name the parts labeled:
a) Define the following web related terms:
i) Web browser A browser is an application program that provides a way to look at and interact with all the information on the World Wide Web. ii)Hyperlink This is the clickable link in text or graphics on a Web page that takes you to another place on the same page, another page, or whole other site. iii) Hypertext document A document usually web document (file) where the user interacts with the whole document using hyperlinks b) List six activities performed on the web
i) Suggest with reasons the most appropriate topology required to inter-connect the computers. a) Bus Reason: Easy to set up, Low cost in terms of cabling QR b)Star Reason: Speed of data transmission is high, Easy to troubleshoot via central hub or switch ii) State the necessary steps required to connect the computers to the Internet.
ggitau @moest. edu.ke Name the parts labeled:
Study the flowchart below and answer the questions that follow
i) Name the control structures used in the flowchart
ii) Determine the values of M, N, P and Q. M………………………….. N……………………….. P ………………………….. Q ……………………… iii) Write the pseudo code for the flowchart b) List four functions of an assembler
ANSWERS
i) Name the control structures used in the flowchart.
- Selection -Sequencing ii) Determine the values of M, N, P and Q. M………17………………..N……………….17………………….. P………..17………………..Q……………….17…………………. iii) Write the pseudo code for the flowchart Q=N
a) Translate assembly language to machine code. b) Execute assembly language statements. c) Create executable files (.exe) from the assembly language statements. d) Allocate memory for machine code. e) Debug for errors Write an algorithm to compute the area of a triangle.
List four factors to be considered when purchasing an operating system.
(a) Give three comparisons of the traditional file management method of typing a document on a typewriter against using a word processor ( 6mks)
Word Processor
(a) Identify three public Universities and three National polytechnics in Kenya where further computer training is offered, In case state the highest level of qualification that can be acquired in computer training.(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)The following flowchart can be used to list the odd numbers between 0 and 100 (a) Write a program segment for the flowchart using a high level language (7mks)State two disadvantages of networking
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 Write –1 in twos compliment notation in byte form (4mks)110 = 12 in byte form it becomes 000000012 One’s complement is 111111102 Two’s complement is 11111112 State and explain two reasons why word processing is one of the most common applications of many computer users.
List three differences between a microcomputer and a super computer (3mks)Microcomputers
Supercomputers
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