Computer Organization & Architecture MCQ for Bihar STET with Answers, PYQs & Notes

Tests in this unit

• Mock TestThe 30-question Unit 2 mock paper from the notes, in book order.30 Q
• PYQ OnlyQuestions asked in the 2023, 2024 and 2025 STET papers, with corrected options.27 Q
• Practice BankTopic-wise questions: CPU, buses, memory, microcontrollers, number systems, codes, gates and adders.62 Q
• Full TestPYQs and the practice bank together.89 Q
• Quick Test30 questions picked at random.30 Q

Unit 2 syllabus: Computer Organization and Architecture

1. Introduction to data representation and number system: decimal, binary, octal, hexadecimal number systems; conversion of numbers from one system to another; binary arithmetic: addition (simple method, using 1's complement, using 2's complement), subtraction, multiplication and division (simple method).
2. Error detection codes: parity bit method, checksum method; error correction code: Hamming code; alphanumeric codes: ASCII, EBCDIC; Excess-3 code; BCD addition method; Gray code: Gray to binary and binary to Gray conversion.
3. Introduction to ideal microcomputer; an actual microcomputer: CPU, address bus, data bus, control bus; memory: RAM (SRAM, DRAM), ROM (PROM, EPROM, UVEPROM, EEPROM); history of microprocessor; microcontroller (application only); addressing techniques.
4. Introduction to digital electronics; logic gates: inverter, OR, AND, NOR, NAND, EX-OR and EX-NOR gates; De Morgan's theorems.
5. Universal gates (only for logic conversion); K-map simplification: pair, quad, octet (up to 4 variables), don't care condition; Arithmetic Logic Unit: half adder, full adder, binary adder, 2's complement adder-subtractor.