Number System: Binary Coded Decimal(BCD) | CCT Exam Bihar & BOR Exam Special

In this video, we dive deep into the Binary Coded Decimal (BCD) system, a crucial topic for computer awareness and Bihar government administrative exams (CCT/BOR). We explain how BCD works, why it is used in digital displays like calculators and clocks, and how it differs from standard Binary and Hexadecimal systems. What You Will Learn: What is BCD? Understanding how each decimal digit is represented by a specific 4-bit binary sequence. BCD Logic: Why BCD treats each decimal digit as an individual entity rather than converting the whole number. Valid vs. Invalid Codes: Why only patterns from 0000 to 1001 are allowed, and why 1010 to 1111 are "forbidden" in BCD. Practical Examples: Step-by-step conversion of decimal numbers (like 25) into BCD. BCD vs. Hexadecimal: Key differences in efficiency and usage between these two 4-bit systems. Important for Exams:This lecture is specially designed for candidates appearing for: 1. CCT Exam (Computer Competency Test) 2. BOR Exam (Board of Revenue) 3. Other Bihar Government Exams