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Questions and Answers
What is the storage capacity of a Gigabyte in bytes?
Which of the following is the highest memory unit listed?
How many bits are there in one Byte?
Which storage unit comes directly after Terabyte in the hierarchy?
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Which of the following ports is primarily used for connecting older mice and keyboards?
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What is the function of the Parallel Port?
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Which feature is NOT a characteristic of a motherboard?
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What type of data transfer speed can a Serial Port achieve?
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What is the primary function of the Control Unit (CU)?
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Which of the following types of memory is considered volatile?
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What type of memory retains its contents when the power is lost?
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Which component supplies information to other units of the computer as necessary?
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What is the main characteristic of volatile memory?
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How does the size of the memory unit affect a computer's performance?
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What type of RAM loses its content when power is lost?
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Which of the following is NOT a type of non-volatile memory?
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What is the main function of the Central Processing Unit (CPU)?
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Which component of the CPU is responsible for performing arithmetic and logic operations?
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What is one of the roles of the CPU in relation to data?
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How does the CPU manage the execution of programs?
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What is a characteristic of the components within a Central Processing Unit?
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What does the CPU require to perform its operations effectively?
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Which statement correctly describes the role of the processing unit in a computer?
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Which statement about the CPU is false?
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Study Notes
Page Printers
- Page printers print an entire page at a time.
- Two types of page printers:
- Laser printers
- Inkjet printers
- Page printers are faster than impact printers.
- Page printers support different fonts and character sizes.
- Page printers print high-resolution output.
Laser Printers
- Non-impact page printers.
- Use laser light to produce dots for characters on a page.
- High-speed and high-quality printing.
- Expensive.
- Heavy-duty printers.
Inkjet Printers
- Non-impact character printers.
- Print characters by spraying small drops of ink onto the paper.
- High-quality output and presentable features.
- Home-based printers.
Projector
- Output device.
- Often used for meetings and presentations.
- Contains a lens that projects an image onto a screen.
Plotter
- Output device.
- Produces graphical output on paper.
- Uses single or multi-color pens to draw pictures, such as blueprints.
- Used for printing maps, architectural plans, and engineering applications.
Speaker
- Output device.
- Plays sound as output.
- Used in multimedia applications for playing sound and music.
Processing Devices
- Electronic circuitry within a computer that carries out instructions by performing arithmetic, logic, controlling, and input/output operations.
- Also known as central processor or main processor.
Central Processing Unit (CPU)
- Brain of the computer.
- Performs all types of data processing operations.
- Stores data, intermediate results, and programs.
- Controls all parts of the computer.
ALU (Arithmetic Logic Unit)
- Part of the CPU that performs arithmetic and logic operations.
- Divided into two parts: arithmetic unit (AU) and logic unit (LU).
CU (Control Unit)
- Controls the operation of all parts of the computer but does not process data.
- Manages and coordinates all units of the computer.
- Responsible for controlling data and instruction transfer between units.
MU (Memory Unit)
- Stores instructions, data, and intermediate results.
- Supplies information to other units of the computer when needed.
- Also known as internal storage unit.
- The size of this unit affects the speed, power, and capabilities of the computer.
Memory
- Location where information is stored that is currently being utilized by the operating system, software programs, hardware devices, and the user.
Volatile Memory
- Loses its content when the computer loses power.
- Example: RAM (Random Access Memory).
Non-Volatile Memory
- Retains its content even when the computer loses power.
- Example: ROM (Read Only Memory).
Primary Memory
- Physical Memory that comes with every computer, also referred to as main memory or primary memory.
- Examples: RAM and ROM.
RAM (Random Access Memory)
- Internal memory of the CPU.
- Stores data, programs, and program results.
- Read/write memory that stores data while the machine is working.
- Data is erased when the machine is switched off.
- Volatile memory.
Measurement Units of Computer Memory
- Bit (b): 0 or 1.
- Nibble (N): 4 bits.
- Byte (B): 8 bits.
- Kilobyte (KB): 1024 bytes.
- Megabyte (MB): 1024 KB.
- Gigabyte (GB): 1024 MB.
- Terabyte (TB): 1024 GB.
- Petabyte (PB): 1024 TB.
- Exabyte (EB): 1024 PB.
- Zettabyte (ZB): 1024 EB.
- Yottabyte (YB): 1024 ZB.
- Brontobyte (BB): 1024 YB.
- Geopbyte (GB): 1024 BB.
Motherboard
- Serves as the platform connecting all parts of a computer together.
- Connects the CPU, memory, hard drives, optical drives, video card, sound card, and other ports and expansion cards directly or via cables.
- Backbone of a computer.
Features of Motherboard
- Supports different types of components.
- Supports a specific type of CPU and a few types of memories.
- Video cards and sound cards must be compatible with the motherboard.
- Must be compatible with the case and power supply.
Important Computer Ports
- Serial Port:
- Used for external modems and older computer mice.
- 9-pin and 25-pin models.
- Data travels at 115 kilobits per second.
- Parallel Port:
- Used for scanners and printers.
- Also called a printer port.
- 25-pin model.
- IEEE 1284-compliant Centronics port.
- PS/2 Port:
- Used for older computer keyboards and mice.
- Also called a mouse port.
- Most old computers have two PS/2 ports, one for the mouse and one for the keyboard.
- USB Port:
- Connects various external USB devices, such as external hard drives, printers, scanners, mice, keyboards, etc.
- Introduced in 1997.
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Description
Test your knowledge on various output devices including page printers such as laser and inkjet printers. Discover how each printer operates, their features, and other output devices like projectors and plotters. This quiz will help reinforce your understanding of these important technologies.
