Question 240 of 319

The system unit houses the following components except?     

  • A.  plotter
  • B. motherboard
  • C. floppy disk
  • D.  central processing unit

Correct Answer: A

Explanation
The correct option is A. plotter. Detailed Explanation
  1. Understanding the System Unit:
  2. The system unit, often referred to as the computer case or chassis, is the main body of a computer. It houses the essential components that are crucial for the computer's operation. These components include the motherboard, central processing unit (CPU), memory (RAM), and storage devices (like hard drives or SSDs).
  3. Analyzing the Options:
  4. A. Plotter: A plotter is an external device used for printing vector graphics. It is not housed within the system unit; instead, it connects to the computer externally, typically via USB or network connections. Therefore, it does not belong to the internal components of the system unit.
  5. B. Motherboard: The motherboard is a critical component of the system unit. It serves as the main circuit board that connects all other components, including the CPU, RAM, and storage devices. It is definitely housed within the system unit.
  6. C. Floppy Disk: While floppy disks are largely obsolete today, they were once a common form of external storage. However, floppy disk drives (if present) would be installed within the system unit, making the floppy disk itself an external storage medium. In modern contexts, floppy disks are not typically housed in the system unit, but the drives that read them would be.
  7. D. Central Processing Unit (CPU): The CPU is often referred to as the brain of the computer. It is a vital component that processes instructions and performs calculations. The CPU is installed directly onto the motherboard, which is located inside the system unit.
  8. Why Other Options Are Incorrect:
  9. B. Motherboard: This is incorrect because the motherboard is a fundamental part of the system unit. It connects all internal components and allows them to communicate.
  10. C. Floppy Disk: While floppy disks are external storage, the floppy disk drive (if present) would be inside the system unit. However, the floppy disk itself is not a component of the system unit.
  11. D. Central Processing Unit: This is incorrect because the CPU is a core component of the system unit, essential for the computer's functionality.
Common Pitfalls
  • Confusing external devices with internal components. It's important to remember that the system unit contains only the internal components necessary for the computer's operation.
  • Misunderstanding the role of storage devices. While some storage devices can be external, their drives may still be part of the system unit.
Revision Summary
  • The system unit contains essential components like the motherboard and CPU.
  • A plotter is an external device and not housed within the system unit.
  • Floppy disks are external storage media, while their drives can be internal.
  • Understanding the distinction between internal and external components is crucial for identifying what belongs in the system unit.
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