State three benefits of using optical magnetic reader to register candidates for an examination.8/1/2021 State three benefits of using optical magnetic reader to register candidates for an examination.
Benefits of using OMR
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State three possible causes of fire outbreak in a computer laboratory.
Sources of fire in a computer laboratory
Distinguish between an assembler and an interpreter as used in programming.
State two advantages of using portable computers.
Advantages of portable computers
Figure 1 shows relationships between tables in a database.
Identify two primary and two foreign keys used in the relationship.
Primary keys
List six file manipulation activities that may be carried out using an operating system.
File manipulation activities- creation of files/folders
State two circumstances under which warm booting of a computer may be necessary.
Reasons for warm booting a computer
State the role of each of the following data communication devices:repeater and router
(b) Figure 3 shows a network based on the bus topology.
(i) Identify the component labelled P. (ii) State the function of the component labelled P. (c) Students of Neema Secondary School formed an environmental club with a goal of taking part in environmental conservation activities. Outline three ways in which they can use the internet to achieve this goal. (d) (i) A company has three branches A, B and C where A is the headquarter. The local area network (LAN) at A is directly connected to the LAN at B and directly to the LAN at C. Explain two benefits of having the LAN at B also directly connected to the LAN at C. (4 marks) (ii) State three ways in which a company can protect its computer network from hackers.
(a) (i) Repeater
(ii) Terminator in a backbone is used to prevent data signal from bouncing back/absorb signals. (c) Use of internet in environmental conservation club
Given the binary number 101011101111011, determine the number of:nibbles and bytes.
Related Searches on data representation in a computer, Form 3 LevelState two ways in which hardware failure is a threat to data security.
List four devices that use scanning technology that would be used to capture data directly from the source.
Direct input methods
State two items that an electronic mail should have for it to be sent.
Items that an email must have:
State three ways in which mobile phones have affected money transactions in the country.
A computer user is unable to retrieve a file stored in a server in an organisation. State three reasons why the user would need to contact the network administrator.
Role of network administrator
A student typed a letter in a wordprocessor and the last line of the letter flowed to the second page. State three ways in which the student could have adjusted the letter to fit on one page without changing the paper size.
Ways of adjusting a document to fit a page
Give two differences between a Graphical User Interface (GUI) and a Commandline Interface.
(a) Report or documentation
(b )Disk/master file/database Differentiate between analogue data and digital data as used in computers. (2 marks)
State three factors to consider when selecting an operating system to install in a computer.7/1/2021 State three factors to consider when selecting an operating system to install in a computer. (3 marks)
Distinguish between a page break and a column break as used in a word processor. (3 marks)
State three functions of Un-uninterruptible Power Supply (UPS). (3 marks)Functions of the UPS
State four factors to consider when selecting an input device for use in a computer room. (4 marks)1. user needs
2. Initial cost
3. Maintenance cost
4. Mode of transmission
5. Amount of space it occupies
6. Compatibility with available hardware
7. User- Friendliness
State the type of error that would occur in data processing for each of the following cases:7/1/2021 (a) Entering the number 315 instead of 351. (1 mark)
(b) Entering the text “Kwys” instead of “Keys”. (1 mark)
(a) Explain the term toggle key as used in computer keyboard. (2 marks)
(b) List examples of toggle keys on a computer keyboard. (2 marks)
State the function of each of the following features of an email software:
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