COMPUTER STUDIES QUESTIONS WITH ANSWERS
One way in which an organisation enforces security of its computer systems is by restricting the use of removable media such as floppy disks and flash memories. Give two reasons for this.
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(a) (1) Explain the term search engine as used in the Internet. (2 marks)
(i) Search-engine
It is a web-based application used to locate for an item or information from world wide web.
(ii) Peter intends to download a movie from the Internet. State the three factors that may determine the total time taken to complete the download. (3 marks)
Factors that affects duration of download
Differentiate between hardware and software portability.
(b) State two disadvantages of CD-ROM over magnetic disks.
Disadvantages of CD ROM over magnetic disks
State two functions of the Control unit of a computer.
(a) With the aid of a flow chart, describe a loop control structure as used in programming. (4 marks)
Looping is the control structure that allows a block of code/statements to be repeated until a certain condition is fulfilled. (2 marks)
State a stage in systems development life cycle where each of the following activities are carried out:
(a) indenting the technologies that may be used in a proposed system; (1 mark)
System analysis/information gathering/problem recognition (b) indenting shortcomings of a system; (1 mark) Problem definition (c) preparing the system migration plan. (I mark) Implementation stage State four computer based careers introduced as a result of computerized data process method at the airport. (2 marks)
Computer based careers created by introducing computerized data processing.
Explain the function of protect sheet feature in a spreadsheet program. (2 marks)Function of protect sheet:
Distinguish between real-time operating system and distributed operating system. (3 marks)
Explain three reasons why an organization may need to change to a new computerised system.
(b) State why each of the following is important in system documentation.
(i) Identify the types of computer files named above. (ii) Give a characteristic of data held in each file. (iii) Name the field that should be used to link the two files.
(a) Current system may be experiencing problems thereby being unable to meet organisation requirements.
New directives may be received from authorities and the organisation must comply. Changes in the operating environment forces the organisation to change in order to fit and continue in business. e.g. competition. Changes in technology requiring the upgrading or total change in the existing system. Peer pressure need to remain fashion (b) (i) Sample data should be provided so that all modules can be tested. (ii) Output reports show that the system actually works/testing process/expected output.. (c) (i) Manual: Manual files stored in cabinets/books/paper/in-tray/out-tray. (ii) Electronic: Secondary storage devices/individual storage devices e.g. Flash. (d) (i) Student: Master file/Parent/Reference File/Primary. Register: Transaction file/Child table/Secondary. (ii) Master file: Data is static/Permanent/Semi-permanent. Transaction file: Data is dynamic/Temporary/Changes frequently (iii) Key field: Student number/Admission No/Reg. No/File No. What is meant by each of the following terms as used in the Internet?,surf, uploading and inbox.4/1/2021 What is meant by each of the following terms as used in the Internet?,surf,uploading and inbox.
(b) A school has set up its network using wireless technology to link computers. State three problems that the school is likely to experience when using this technology.
(c) List three ways by which parents can protect their children from accessing inappropriate content from the internet. (d) Explain three problems associated with using e-mail technology for communication.
(a) Surfing: Its the process of accessing /browsing/visiting internet resources like webpages.
​​With the aid of an example, explain the term multi-level list as used in word processing4/1/2021 With the aid of an example, explain the term multi-level list as used in word processing. (3 marks)Multilevel list:
It is a format style that shows the listed items of different levels rather than one at one level. Each level has different indentation and numbering style @2. Example (Accept any) 1. Chapter One 1.1 Introduction 1.1.1 Definition of terms @1 A law firm prefers to use hard Copy Output over soft Copy Output when handling documents for legal matters State two reasons for this preference (2 marks)
Advantages of hard copy output.
State three Ways in which an operating System Secures a Computer System.
Ways in which an OS secures computer system:
What is meant by each of the following terms as used in table creation?
(a) What is meant by each of the following terms as used in table creation?
(i) cell margin; (ii) nested table. (b) State four types of text wrap that can be applied to a graphic. (c) Distinguish between each of the following: (i) axis labels and data labels; (ii) cropping and sizing. (d) Figure 1 shows a section of a worksheet containing information on household items. Use it to answer the questions that follow.
(i) Write a formula to calculate the total cost of rice.
(ii) The prices of all items increased by 10% and the value 10% is placed in cell B8. Using cell addresses with absolute referencing only, write a formula to calculate the new unit price of salt. (iii) Write a function to display the number of cells in which the cost per unit is equal to 110. (iv) Write a function to display the least total cost for all items.
(a) (i) Cell margin: Its the space between the boundary of the cell and the text/content inside the cell.
(ii) Nested table: is a table created inside another table. (b) In line with text.
State three standard data coding schemes used in computing and electronic systems.
(b) Convert each of the following numbers:
(i) 110.1012 to decimal; (ii) 12.687510 to binary; (c) Subtract 110.012 from 11001.01012 (d) Using twos complement, perform the following binary arithmetic leaving the answer in binary notation. 11012- 1001012
(a) Binary coded Decimal (BCD) )(4 bits).
Give two characteristics of scripting languages.
(b) Describe two types of errors that may be detected during program testing.
(c) A company’s workers travel to work either by public or by private means. All workers are paid a travel allowance of Ksh. 200, but those using private means are paid an additional Ksh. 100. (i) Write a pseudocode to determine a worker’s travel allowance. (ii) Draw a flowchart to determine a worker’s travel allowance. (iii) Other than occupying large space, state two disadvantages of using a flowchart instead of a pseudocode.
(a) Characteristic of scripting language:
​​State three possible reasons for the extinction of daisy wheel printers in the market. (3 marks)
Reasons why daisy wheel printer are in extinct.
Related Searches​State three advantage of flat panel monitors over cathode ray tube monitors as used in computers4/1/2021 State three advantage of flat panel monitors over cathode ray tube monitors as used in computers. (3 marks)
Advantages of flat panel monitors.
State two application areas of real time systems.
State the importance of considering the following factors when acquiring a software; warranty;and portability.
(a) Warranty: If a software has a problem then it can be replaced.
If not working can be returned for repair. (b) Portability: To ascertain the compatibility with other systems. State three ways in which barcode readers may be used in schools. (3 marks)
Ways in which barcode readers can be used in a school.
State three measures that should be put in place in a computer laboratory to safeguard Users’ health. (3 marks)
Measures to be put in place in the laboratory to safeguard user health.
State the purpose of each of the following in database design.(a) input mask
(b) default value
Pesa Mingi company has offices in Nairobi and Kampala connected in a network. The management is convinced that someone is illegally gaining access to the data in their computers. State three ways in which the company can overcome this problem.
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