INSTRUCTIONS TO CANDIDATES
- Write your name and index number in the spaces provided above
- Sign and write your name in the spaces provided above
- This paper consists of two sections; A and B
- Answer all questions in section A
- Answer question 16 and any other three questions from section B
- All answers should be written in the spaces provided on the question paper
SECTION A (40 Marks)
Answer all questions in this section
- Give TWO reasons why Powder type fire extinguishers are not recommended to be used in a computer laboratory. (2 Marks)
- State the purpose of each of the following memories in a computer system. (2 marks)
- ROM
- RAM
- State two factors that one would consider when selecting data entry method in computing. (2 Marks)
- Describe the following types of printers and state one application area of each.(3Marks)
- Dot matrix
- Thermal printer.
- Differentiate between in-house software and freeware. (2 Marks)
- Give two importance of feedback mechanism in systems (2 Marks)
- With an aid of a diagram, explain one-to-one database relationship. (2 Marks)
- KASSU Secondary School intends to set up internet connection in their school for e-learning purposes. Advise the school management on four internet connectivity requirements that is required for them to be able to access internet. (2 Marks)
- The figure below shows an extract of an e-mail application.
What is meant by each of the following terms: (3 Marks)- Trash
- Spam
- Inbox
- State two ways in which users in an organization can be a security threat to data in an information system. (2 Marks)
- State three negative impact of information communication technology on the Environment. (3 Marks)
- In a computer based information system, state the purpose of the following files and give one example where such a file may be required in a school. (4 marks)
- Report file.
- Sort file.
- State three responsibility of a Database administrator in an organization. (3 Marks)
- With an example for each, describe how computers are used in the following areas of education; (3 Marks)
- Simulation
- Tutorial
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- Dan a computer student noticed that every time a person enters the computer lab the computer screen flickers. Identify three reasons why the monitor might be flickering (3 Marks)
- State two ways in which the problem can be solved (2 Marks)
SECTION B (60 Marks)
Answer question 16 and any other three questions
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- State two advantages and two disadvantages of high level programming language (2 Marks)
- State three situations when REPEAT .. UNTIL structure can be used in writing a program (3 Marks)
- The roots of the equation ax2 + bx + c = 0 are given by the formula
- Write a pseudocode for the above program (5 Marks)
- Draw a flow chart for the above pseudocode (5 Marks)
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- The figure below shows a picture tool bar
Name and state the functions of the features marked A, B and C:- A (1 Mark)
- B (1 Mark)
- C (1 Mark)
- The figure below shows a picture tool bar
- State the importance of Column breaks as used in word processor. (1 Mark)
- Change case is where a user applies so that the text can have some contrast in size. Write the word (2 Marks)
- Title case
- Toggle case
- Define the following terms as used in charts. (2 Marks)
- Legend
- Data range
- The table below shows how a kiosk owner uses a spread sheet to keep records in a shop.
A B C D E F 1 ITEM NAME NUMBER OF ITEMS UNIT COST TOTAL BUYING PRICE TOTAL SELLING PRICE PROFIT 2 Blue band 150 120 3600 3 Toss 135 50 1350 4 Cow boy 120 120 2880 5 Panga soa 118 50 1180 - Write a function to calculate the total buying price. (2 Marks)
- Write a formula to calculate the Profit. ( 2 Marks)
- The total buying prices of all items was increased by 12% and the value 12% is placed in cell B6. Using cell addresses with absolute referencing, write a formula to calculate the Total Selling Price in cell E2. (2 Marks)
- State the output of the expression =SUMIF(F2:F5,"<1 500")would return.(1 Mark)
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- Describe the term prefixing an extra sign bit as used in data representation. (2 Marks)
- Convert each of the following numbers system.
- to binary (2 Marks)
- to Octal (2 Marks)
- Perform the following binary operation. (3 Marks)
1010.11 + 111.10 - 101.11 - Using one’s complement, perform the following binary arithmetic leaving the answer decimal notation. (6 Marks)
1710 - 4510
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- Distinguish between the following terms as used in data communication (6 Marks)
- Guided transmission medium and unguided transmission media
- Multiplexing and demultiplexing
- Logical and physical Topology
- Below is a diagram of a network topology.
- Name the above topology (1 Mark)
- State two advantages and two disadvantages of using the topology named above (4 Marks)
- List and explain the two data transmission techniques (4 Marks)
- Distinguish between the following terms as used in data communication (6 Marks)
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- Distinguish between a computer drive and computer driver (2 Marks)
- State any four factors to consider when selecting an operating system (4 Marks)
- Explain any four factors that dictates how the operating system organizes data in a computer (4 Marks)
- Define the term file in relation to the operating system (1 Mark)
- The operating system stores details of a file for easy identification and retrieval of files. Explain any four file details the operating system uses to search and identify a file (4 Marks)
- Distinguish between a menu driven operating system and graphical user interface operating system (2 Marks)
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