Data Representation and Logic Basics

Track: Computer Awareness for Banking and Recruitment Examinations
Level: Beginner
Coverage: Five curriculum lessons (CA-04-01 to CA-04-05)
Practice: 60 original objective questions with explained answers

A computer works with patterns of bits. Those patterns may represent numbers, letters, pictures or instructions. By learning a few number systems and logical rules, you can understand why computers use binary, how text is stored, why digital circuits make decisions, and what common files contain. These are useful ideas for banking and other recruitment-exam computer awareness, even if you never write a program.

Study approach: Learn the meaning of each concept first. For conversions, practice with small numbers rather than memorizing a large formula sheet. Attempt each lesson's 12 MCQs before consulting the explanations. All questions are original exam-style practice—not claimed previous-year questions.

Module learning outcomes

After completing the module, you should be able to:

1. Recognize base-2, base-8, base-10 and base-16 notation and valid digits.
2. Convert small whole numbers between common bases with place values or grouping.
3. Distinguish ASCII, Unicode, a character/code point and an encoding such as UTF-8.
4. Explain Boolean values and identify the outputs of common elementary logic gates.
5. Recognize everyday data types, file formats, file extensions and practical limitations of extension-based identification.