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Questions and Answers
What is the primary function of the Central Processing Unit (CPU)?
What is the primary function of the Central Processing Unit (CPU)?
- To organize and execute instructions (correct)
- To accept input from the user
- To convert data into a readable format
- To store data permanently
Which of the following components is considered hardware?
Which of the following components is considered hardware?
- Database management system
- Operating system
- Word processing software
- Keyboard (correct)
What is the role of the input unit in a computer system?
What is the role of the input unit in a computer system?
- To convert user input into a computer-readable format (correct)
- To execute program instructions
- To permanently store data
- To display processed data to the user
Which option best describes data in a computer system?
Which option best describes data in a computer system?
What does software refer to in the context of a computer system?
What does software refer to in the context of a computer system?
Which of the following is NOT a function of the CPU?
Which of the following is NOT a function of the CPU?
Which of the following is an example of an input device?
Which of the following is an example of an input device?
Which component is responsible for performing operations on data?
Which component is responsible for performing operations on data?
People who use a computer are categorized as which component of the computer system?
People who use a computer are categorized as which component of the computer system?
Which of the following best describes the purpose of computer architecture?
Which of the following best describes the purpose of computer architecture?
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Study Notes
Introduction to Computer Systems
- A computer system integrates hardware, software, and users (“humanware”) to manage and present information effectively.
- Computer architecture refers to the design and arrangement of various computer system components.
- Key components in computer architecture include the input unit, processing unit, storage unit, and output unit.
Components of Computer System
- Data: Raw facts, such as characters, numbers, images, and sounds, that can be manipulated by the computer.
- Software: A collection of instructions or programs that direct hardware operations for specific tasks.
- People/User: Individuals who operate and interact with the computer system.
- Hardware: The tangible physical components of a computer, categorized into four main units:
- Input Unit
- Central Processing Unit (CPU)
- Memory Unit
- Output Unit
Input Unit
- Accepts inputs from users and converts them into a format the computer can process and store.
- Acts as the interface for users to provide data and instructions.
- Common input devices include:
- Keyboard
- Mouse
- Scanner
- Light pen
- Joystick
- Microphone
- Barcode reader
Central Processing Unit (CPU)
- Functions as the brain of the computer, organizing and executing instructions.
- Processes data from main memory and sends results back to main memory.
- Key functions of the CPU include:
- Executing processing operations.
- Sending commands to other computer parts.
- Controlling the sequence of operations.
- Managing data or instruction storage.
Sub-components of CPU
- Arithmetic and Logic Unit (ALU): Executes arithmetic (addition, subtraction, multiplication, division) and logical operations (AND, OR, NOT) as well as relational operations (identifying equalities and inequalities).
- Control Unit (CU): Coordinates the activities of the computer by directing operations of the ALU, memory, and input/output devices.
- Set of Registers: Small storage locations within the CPU used to hold temporary data and instructions.
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