Computer Science Questions and Answers - Grade 7 Opener Exams Term 2 2023 Set 3

QUESTIONS

1. Define the following terms. (6 mks)
   1. Computer
   2. Data
   3. Information
2. Grade Seven learners of the Bora Academy were discussing different characteristics of computers. Identify three characteristics that they came up with. (3 mks)
3. John's parents bought him a laptop. How will the laptop assist John in his studies? (4mks)
4. What is the meaning of computer processing cycle? (2mks)
5. Complete the cycle below by filling the stages marked with letters. (3mks)
   
6. Before the existence of computers human beings performed calculations manually. They later invented devices that were used for computing. Complete the following by fitting in the early devices that were used-in-computing-before the existence of computer
   
   
   • W
   • Z
   • L
   • Y
   • W
7. Write the Acronym of ABACUS in full. (6mks)
   • A
   • B
   • A
   • C
   • U
   • S
8. What are the advantages of using computers in data processing? (1mk)

Marking Scheme

1.              
   1. A computer is an electronic device that converts data into information.
   2. Data refers to raw facts such as numbers, symbols, images and letters.
   3. Information refers to processed data that is meaningful to the user.
2. 1. It can perform a variety of tasks.
   2. It does not get tired, bored or lose concentration.
   3. It carries out tasks very fast 
   4. It is accurate
   5. It display information, play music and draw diagrams.
3.          
   1. Help her to perform calculations such as addition, subtraction, multiplication and division.
   2. Help her to draw diagrams. 
   3. Help her to search for information from the internet.
   4. Help her to type documents and send electronic mails.
4. It refers to the processess that take place in a computer. The computer through an input device to the time processed data is presented to the user through an output device. 
5.                  
   1. Processing
   2. Storage 
   3. Output
6.                                    
   • W-Napier's bones
   • Y-Leibniz wheeel
   • Z-Analytical engine
   • K-Differencial engine
   • L-Census machine
7.                          
   • A-Abundant
   • B-Beads
   • A-Addition
   • C-Calculation
   • U-Utility
   • S-System
8.              
   1. Perform tasks automatically.
   2. Increase productivity due to automation.
   3. More accurate than humanbeings.
   4. Provides security of data.
   5. Can store large amounts of data.