Grade 10 Computer Science

Revision Week 1 Grade 10 Computer Science Objectives:  Defining Computers and Computer System  Classifying Computer  Identifying System Components  The Memory: RAM and ROM True/False Indicate whether the statement is true or false.

__T__ 1. Special-purpose computers are used mostly to control something else, such as a dishwasher or airport radar system. __F__ 2. The components that the computer uses to process data are contained within the hard drive.

__F__ 3. The motherboard is also called the circuit board.

__F__ 4. The motherboard is housed on a tiny silicon chip that contains millions of switches and pathways that help your computer make important decisions.

__T__ 5. The ALU can execute complex tasks, such as what a video game uses to determine what appears on your screen.

__T__ 6. As electricity travels through processor pathways, it turns switches on and off. The absence of electricity represents a 0.

___T_ 7. ROM chips are nonvolatile.

Modified True/False Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true. __T__ 8. Notebook computers are another term for laptop computers.

__F__ 9. A mainframe is the fastest type of computer. Government agencies and large corporations use them for specialized applications to process enormous amounts of data. (supercomputer)

__F__ 10. Arithmetic computations involve comparisons, such as asking the computer to determine if two numbers are equal. (logical)

__T__ 11. The control unit reads and interprets the program instruction and changes the instruction into machine language. Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 12. Data is ____. a. text, numbers, sound, images, or video. c. output b. information d. software ____ 13. The first step in the information processing cycle is ____. a. outputs information c. inputs data b. stores data and information d. processes data ____ 14. A computer performs operations use ____ operators such as AND, OR, and NOT. a. arithmetic c. logical b. simple d. analytical

1 ____ 15. A computer that delivers Web pages to browsers and other files to applications via the HTTP protocol is considers a ____ server. a. file c. database b. Web d. mobile

____ 16. The system case includes all of the following EXCEPT ____. a. processor c. video card b. monitor d. memory

____ 17. The above figure shows an example of a(n) ____. a. CPU c. system unit b. circuit board d. motherboard ____ 18. CPU stands for Central ____ Unit. a. Processing c. Port b. Programming d. Precision ____ 19. ____ is a set of special instructions that control the activities of a computer. a. A program c. CPU b. Software d. Both a. and b.

____ 20. The above figure shows an example of a(n) ____. a. circuit board c. microprocessor b. motherboard d. expansion port

____ 21. Which of the following is NOT true about microprocessors? a. A dual-core processor is a single chip that c. A multicore processor is an expansion that contains two separate processors. provides for more than two separate processors. b. Microprocessor speed is generally d. The switches on a microprocessor control measured in megahertz (MHz). the flow of electricity. ____ 22. Java, COBOL, and C++ are all examples of ____ languages. a. programming c. basic b. machine d. binary ____ 23. A ____ is approximately a billion bytes. a. kilobyte c. gigabyte

2 b. megabyte d. terabyte ____ 24. RAM stands for ____ Access Memory a. Remote c. Random b. Return d. Regular

Alia starts her computer and begins working on a new Microsoft Word document.

___1.When Alia starts Microsoft Word, the computer loads the word-processing instructions into ____. a. RAM c. the operating system b. ROM d. the motherboard

____2.Which type of computer is designed for one person to use at a time? a. Personal Computer c. server b. Supercomputer d. mainframe

____3.Tiny chips embedded in dishwashers, bathroom scales, or airport radar systems are classified as ______computers.

a. One-purpose c. General-purpose b. Multi-purpose d. Special-purpose

Completion Complete each statement. server Executing computer binary

1. A(n) ___computer______is an electronic device that receives, process, stores data, and produces a result.

2. A(n) ______server______generally is used by small to medium-size companies and can support a few users or hundreds of users.

3. A computer understands only machine language, or _____binary______code. 4. ______Executing______is the process of carrying out commands. Matching

Identify the letter of the choice that best matches the phrase or definition. a. Mobile devices b. Tablet PCs c. Executing d. Decoding e. Storing

__C__ 1. The process of carrying out commands.

__A__ 2. Examples include calculators, smart phones, and handheld games.

__E__ 3. Writing the result to memory.

__D__ 4. The process of translating instructions into signals the computer can execute.

__B__ 5. A personal computer similar in size and thickness to a notepad.

3 Short Answer Questions Answer the following questions

1. List the main steps of the Information Processing Cycle:- A. Input data

B. Process data

C. Output information

D. Stores data and information.

2. What is a computer? Answer: is an electronic device that receives data, processes data, stores data, and produces a result.

3. What are the main two computer operations? Answer: arithmetic computations and logical operations.

4. RAM is not referred to as the main memory or primary memory. True/ false (False)

5. Central Processing Unit is called Microprocessor or Central Processor. True/false (True)

6. List 4 different types of computers: Answers: Smart Phone, Notebook, Personal computer, Super computer.

7. Order the following steps on how RAM works and how computer process data.

3 you give your work-processing program a command to process your data by arranging it in a special format, such as alphabetical order. This command and your processed data now also are stored in RAM. 1 you start your word processing program. The computer then loads the word- processing program instructions into RAM. 4 You exit your word-processing program and turn off the computer 2 you input the names, addresses, and telephone numbers (your data). Your data is also stored in RAM. 5 All instructions, data and information that you used to create your address list are erased from RAM.

8. Define the following: Computer: An electronic device that receives data (input), processes data, stores data, and produces a result (output). Hardware: The actual machine—wires, transistors, and circuits.

4 Software: Consists of instructions or programs for controlling the computer. Data: Text, numbers, sound, images, or video. Information: Output Server: A computer generally used by small to medium-size companies and can support a few users or hundreds of users. Mobile device: Computers that can fit into the palm of your hand. Supercomputer: The fastest type of computer used to process enormous amounts of data Tablet PC: A personal computer similar in size and thickness to a notepad. Notebook computer: Today’s most widely used personal computer, designed for one person to use at a time. Motherboard: A circuit board that contains many integral components. Circuit board: A thin plate or board that contains electronic components. Central processing unit (CPU): Also called the microprocessor or central processor, is the brains of the computer. Dual-core processor: Is a single chip that contains 2 separate processors. Multicore processor: Is an expansion that provides for more than two separate processors. Arithmetic/logic unit (ALU): Performs arithmetic computations and logical operations. Control unit: The boss, so to speak, and coordinates all of the processor’s activities. Binary code: machine language, 0s and 1s. Bit: smallest unit of information storage. Byte: is a single character, such as a letter or number. Memory: Where data is stored on the motherboard. Random access memory (RAM): The main memory or primary memory on the motherboard. Computer System: includes hardware, software, data, and people. Mainframe computer: is a large, expensive computer capable of supporting hundreds or even thousands of users. Embedded computers: perform specific tasks and can be found in a range of devices such as digital watches, traffic lights.