COMPUTER STUDIES QUESTIONS WITH ANSWERS
Explain three ways in which an operating system provides data security in a computer system14/1/2021 Explain three ways in which an operating system provides data security in a computer system
Access control:
(b)State two instances where observation is not a viable method of gathering data during system analysis stage.
I. repeater
I. Identify the component labelled P.
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Explain why an intranet is a more secure way to share files within an organisation compared to the Internet.
Explain two ways in which the use of internet could make reporting of corruption easier
(b) Explain two circumstances under which the use of wireless communication would be preferred in data communication.
(c) Figure 2 is an extract of a spreadsheet showing what the students had targeted to score and the actual score in a computer remedial class.
A performance factor is obtained by subtracting the target score from the actual score and dividing the difference by the target score.
Write a formula that uses cell references only that would be entered in cell: (i) D2 to compute the performance factor. (ii) E2 to display the statement ‘more remedials’ if the performance factor is less than zero, ‘exempted’ if the factor is greater than zero and ‘optional remedials’ if otherwise. (iii) D8 to display the best performance factor.
RESPONSES
(a) Ways ¡n which internet makes reporting of corruption easier.
State three functions of networking operating systems other than providing network security.10/1/2021 State three functions of networking operating systems other than providing network security.
(b) Explain three ways in which an operating system provides data security in a computer system.
(c) Explain three circumstances under which observation method may be preferred during data collection.
(a) Functions of network operating systems
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
A) State three hardware devices that may be required to connect a computer to an existing local area network. (3 marks)
B) A publisher intends to use a desktop publishing programme to create a publication which is to have many graphics. State three ways in which the graphics may be acquired for this purpose. (3 marks)
C) Interpret each of the following spreadsheet formula:(i) = countif(D2:D9, “>“&B4) (2 marks) (ii) sumif(B3 :B 11, “4M”, D3 :D11) (2 marks) (i) = Countif (D2 : D9, “>“ & B4)
(D) The following are the fields of products table in a database created to store records of products manufactured in a factory:
II. State three properties to be put in place during table design to ensure integrity of the data entered. (3 marks) I) Product Number — Number/Autonumber/Text
A) State four outcomes that may result from using incorrect requirement specifications during systems development. (4 marks)
B) A school opted to use direct change over approach when installing a new system. |
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