Questions and Answers
What is the primary function of the Control Unit in the CPU?
Retrieve and decode instructions
What type of memory is used for temporary storage of data and applications?
RAM (Random Access Memory)
Which of the following is an input device?
Scanner
What is the primary function of the Power Supply?
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What type of storage device stores data on interconnected flash memory chips?
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What is the primary function of the Arithmetic Logic Unit (ALU) in the CPU?
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Study Notes
Hardware Components
Input Devices
- Keyboard: allows users to input text and commands
- Mouse: allows users to interact with graphical user interfaces
- Scanner: captures images or documents
- Webcam: captures video and images
- Microphone: captures audio input
Central Processing Unit (CPU)
- Executes instructions and performs calculations
- Consists of:
- Control Unit: retrieves and decodes instructions
- Arithmetic Logic Unit (ALU): performs arithmetic and logical operations
- Registers: small amount of memory built into the CPU
Memory
- RAM (Random Access Memory): temporary storage for data and applications
- ROM (Read-Only Memory): permanent storage for firmware and BIOS
- Cache Memory: small, fast memory that stores frequently accessed data
Storage Devices
- Hard Disk Drive (HDD): stores data on a magnetic disk
- Solid-State Drive (SSD): stores data on interconnected flash memory chips
- Optical Drives: stores data on CDs, DVDs, or Blu-ray discs
- Flash Drive: portable storage device that stores data on flash memory
Output Devices
- Monitor: displays video and graphics
- Speakers: produces audio output
- Printer: prints text and images on paper
Power Supply
- Converts Alternating Current (AC) power from the wall outlet to Direct Current (DC) power for the computer's components
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