Hardware, CPU and Memory

Track: Computer Awareness for Banking and Recruitment Examinations
Level: Beginner
Scope: Eight complete lessons, CA-02-01 to CA-02-08
Practice: 96 original MCQs, with explanations

A computer contains more than its visible keyboard and screen. Processing, short-term working memory, long-term storage, connectors and input/output devices work together. In this module you will learn to recognize these parts, understand their purposes and avoid the look-alike terms that often appear in objective examinations.

How to study: Understand each device's job before memorizing its full form. Work through the examples, revise the comparison tables and attempt each lesson's 12 questions without looking at the answer key. These are original exam-style questions, not claimed previous-year questions.

What you will learn

1. Recognize the motherboard and the main components attached to it.
2. Explain the roles of the CPU, ALU, control unit and registers.
3. Identify input devices, including OCR, OMR, MICR and barcode readers.
4. Distinguish output devices and identify soft versus hard copy.
5. Compare RAM, ROM, cache and registers without confusing their roles.
6. Tell apart HDDs, SSDs, optical discs and removable flash storage.
7. Calculate with bits and bytes and distinguish decimal from binary prefixes.
8. Recognize common ports, connectors and peripheral devices.