Explore a wide range of computer studies questions and answers for KCSE exams, along with valuable resources and study materials

What are the DOS commands used for the following?

31/12/2020

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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Distinguish between formatting a disk and scanning a disk with reference to operating systems.

31/12/2020

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Distinguish between formatting a disk and scanning a disk with reference to operating systems.

Formatting a disk is the process of preparing a disk or other storage medium for use, including setting up an empty file system. while scanning a disk is the process of checking and correcting bad blocks or disk errors on any writable media. such as a hard disk, zip, floppy or super disk. Cracking for virus.

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State any two features of a user- friendly program

31/12/2020

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State any two features of a user- friendly program

Relatively easy for user to start using the software
Amount of effort & information required of the user to get the system to complete required tasks should be kept minimum
Systems should be self- contained so that the user is not forced into accessing manuals or dealing with things be kept out of the system
System should be able to adjust to different levels of expertise between users, and as users grows in competence.
User should be made to feel in control of what is going on

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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

30/12/2020

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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.

Keep backup copies of the project on offline secondary storage media.
The project is not copied by other students.
Use passwords for opening and modifying the project

d) Other than I/O devices, list other three devices under the control of the operating

Main memory
CPU/Processor
Secondary storage
Communication device

ii) Explain any one of the devices named in c(i) above.
e) Define the term trouble shooting

Systematic approach to locating the cause of a fault in an electronic circuit or system

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List four factors to be considered when purchasing an operating system.

30/12/2020

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List four factors to be considered when purchasing an operating system.

Does the operating system guarantee the security of your computer, the application software and the data you are handling?
The second crucial question, related with the issue of security, is the question of the type of network you work with. Is your computer a home computer for simple application such as word application or a corporate or business computer in which you handle high-tech data, confidential information and financial transactions which require high level security?
A third question you should answer when going for an operating system is the memory of your computer. Most current operating systems do not load onto less than 128MB of memory and therefore, for a computer with less memory, old school operating system such as DOS and windows 98 might suffice.
The cost
Expandability/upgradeability

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Jane has noticed the following problems in her computer keyboard

29/12/2020

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Jane has noticed the following problems in her computer keyboard

It is taking longer time to start up;
It is often hanging;
Applications are taking longer to load.

State three possible causes of these problems and how they can be solved

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.

Jane has noticed the following problems in her computer keyboard

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One of the functions of an operating system is job scheduling. Explain what is mean by job scheduling.

29/12/2020

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List two examples of:Third generation languages and Object oriented languages

b) List and explain three types of user interfaces.
c) Describe the following categories of software:
i) Firmware
ii) Proprietary software
d) a new company XYZ intends to go into the business of desktop publishing. Advise the company on three computer hardware system specification features to consider as a measure of enhancing performance.

(a) One of the functions of an operating system is job scheduling.
Explain what is meant by job- scheduling
Running of a particular job/ task under a system of priority, computer resource availability, time allocated to user etc.
(b) List and explain three types of user interfaces

Command driven- Command language dialogues are those in which the user types instructions to the computer in a formally defined language
Menu driven- These allow the user to issue commands by selecting choices from a menu of displayed alternatives
Graphical User interface- These are those in which the user manipulates, though button pushes and movements of pointing devise such as a house, a graphic or iconic representation of the underlying data.

(c) Describe the following categories of software

(i) Firmware
Soft ware that is burnt in computer ROM chips, usually system software
(ii) Proprietary Software
Any software as opposed to freeware, which is available freely

(d) A new company XYZ intends to go into the business of desktop publishing. Advise the company on three computer hardware system specification features to consider as a measure of enhancing performance.

Consider RAM capacity
Consider speed of computer
Consider hard disk capacity

One of the functions of an operating system is job scheduling. Explain what is mean by job scheduling.

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Give one difference between internal and external commands in Disk Operating System

28/12/2020

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(a) Give one difference between internal and external commands in Disk Operating System (2mks)

Internal DOS commands are part of a file called command that stays resident in memory (RAM)
External DOS commands are stored on secondary storage and are only loaded onto RAM when required

(b) Name two DOS commands that may be used for checking disk errors (1mk)

CHKDSK,
SCANDISK

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State two differences between Disk Operating System (DOS) and WINDOWS operating system.

28/12/2020

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(a) State two differences between Disk Operating System (DOS) and WINDOWS operating system.

DOS is command driven while Windows is GUI driven
DOS is difficult to learn and use while Windows is easier to learn and use.

MS DOS operation window

(b)
(i) Define the term application Software

Software with a specific function, such as word processor or game. It is meant to benefit the end user.

(ii) Give one example of application software (1 mk)

Word processor e.g. Ms Word
Spreadsheet e.g. Ms Excel

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Differentiate between single-user and multi-user operating systems giving an example of each.

25/12/2020

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Differences between single user and multiuser operating system

Differences between single-user and multi-user operating systems and example of each:
	Single-user operating system	Multi-user operating system
1. Definition	It is designed for use by only one person	A multi-user operating system allows for multiple users to use the same computer at the same time and different times.
2. Differences	designed to be used by a single person	designed to be used by more than one person at the same time
3. Examples	Microsoft Dos Ubuntu Windows 8	Linux UNIX Windows NT

Another Linux-Windows Wallpaper

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A multinational organization has offered to donate computers to your school. The Board of governors has requested you to advise on the operating system to be used by providing answer the following questions.

23/12/2020

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A multinational organization has offered to donate computers to your school. The Board of governors has requested you to advise on the operating system to be used by providing answer the following questions.

Logo of Ubuntu operating system

a) What is an operating system? (1mk)

System software that controls the computer system (hardware and other
application software)

b) State and briefly explain an two types of operating systems. (6mks)

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Difference between Job Scheduling and Job Sequencing.

23/12/2020

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Difference between Job Scheduling and Job Sequencing

Introduction

According to technopedia.com, Job Scheduling is the process of allocating system resources to many different tasks by an operating system (OS). Britannica.com has the same definition as technopedia.com. According to (Dr. John Onunga and Renu Shah 2003) K.I.E books 1 Page 156, Job scheduling involves preparing, scheduling and monitoring jobs for continuous processing by the computer system.

They explain the functions carried out at job scheduling as:

Controlling the loading and running of programs
Communicating directly with users and/or the operator
Dealing with user commands to organise files and run programs

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Define the term 'operating system'

23/12/2020

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operating systems

What is an operating system?

An operating system is a group of programs that manage all activities on the computer [J Onunga & Shah, 2003]
An operating system is the main program that controls the execution of user applications and enables the user to access hardware and software resources of a computer [S.Mburu & G Chemwa, 2004]
An Operating System, or OS, is low-level software that enables a user and higher-level application software to interact with a computer’s hardware and the data and other programs stored on the computer. ~ https://www.informatics.indiana.edu/rocha/academics/i101/pdfs/os_intro.pdf
An operating system (OS) is a large and complex set of system programs that control the various operations of a computer system and provide a collection of services to other (user) programs. The purpose of an operating system involves two key goals:

Availability of a convenient, easy-to-use, and powerful set of services that are provided to the users and the application programs in the computer system
Management of the computer resources in the most efficient manner

~http://samples.jbpub.com/9781449626341/26341_CH01_Garrido.pdf

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State the criteria for choosing an operating system

11/4/2019

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previously: WHAT IS A DISTRIBUTED SYSTEM?

What is an operating system

An operating system is a collection of integrated computer programs that provide recurring services to other programs or to the user of a computer.
These services consist of disk and file management, input/output activities, storage resources, diverse support services and control of various resources.

Ssmengg.edu.in describes an operating system as a program that acts as an intermediary between a user of a computer and the computer hardware. it further adds "the purpose of an operating system is to provide an environment in which a user can execute programs and the primary goal of an operating system is thus to make the computer system convenient to use."

STATE THE CRITERIA FOR CHOOSING AN OPERATING SYSTEM

Linux Logo

Tutorial point describes an Operating System (OS) as an interface between a computer user and computer hardware. An operating system is a software which performs all the basic tasks like file management, memory management, process management, handling input and output, and controlling peripheral devices such as disk drives and printers.
Some popular Operating Systems include Linux Operating System, Windows Operating System, VMS, OS/400, AIX, z/OS, etc.

factors to consider when choosing an operating system

Hardware Configuration i.e. speed, capacity, memory etc.
Make, size and nature of the computer i.e. laptop, desktop, phone, super computer, calculator etc.
Application intended for the computer. i.e. if the computer is a special purpose or general purpose
User friendliness i.e. capable for support Graphical User Interfaces (G.U.I)
Documentation such as warranty that spells terms of trade, receipt/invoices, user's manual etc.
The initial cost and maintenance cost.
Reliability and security.
Number of processors and hardware available
Number of users
Upgradeability

next: MATCHING COMPUTER GENERATIONS WITH THE TECHNOLOGY USED TO MANUFACTURE THEIR PROCESSORS

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COMPUTER STUDIES QUESTIONS WITH ANSWERS

Distinguish between formatting a disk and scanning a disk with reference to operating systems.

​State any two features of a user- friendly program

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

List four factors to be considered when purchasing an operating system.

Jane has noticed the following problems in her computer keyboard

List two examples of:Third generation languages and Object oriented languages

(a) Give one difference between internal and external commands in Disk Operating System (2mks)

​(b) Name two DOS commands that may be used for checking disk errors (1mk)

​(a) State two differences between Disk Operating System (DOS) and WINDOWS operating system.

(b) ​(i) Define the term application Software

​(ii) Give one example of application software (1 mk)

Differences between single user and multiuser operating system

Single-user operating system

1. Definition

2. Differences

3. Examples

​a) What is an operating system? (1mk)

​b) State and briefly explain an two types of operating systems. (6mks)

Difference between Job Scheduling and Job Sequencing

Introduction

What is an operating system?

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What is an operating system

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State any two features of a user- friendly program

(b) Name two DOS commands that may be used for checking disk errors (1mk)

(a) State two differences between Disk Operating System (DOS) and WINDOWS operating system.

(b)
(i) Define the term application Software

(ii) Give one example of application software (1 mk)

a) What is an operating system? (1mk)

b) State and briefly explain an two types of operating systems. (6mks)