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  EMRS STAFF SELECTION EXAM (ESSE)-2025 ESSE 2025 Tier-2 Examination TGT/PGT Computer Science (Mock Paper)                Time: 3 Hours                          Maximum Marks: 100                  Syllabus Link : Check here Instructions: 1. Section A consists of 40 Multiple Choice Questions (1 mark each). 2. Section B consists of 15 Descriptive Questions (4 marks each). 3. All questions are compulsory. Section A: Multiple Choice Questions (40 × 1 = 40 Marks) 1. Which memory is fastest in a computer system? (a) RAM (b) Cache (c) Hard Disk (d) ROM 2. Which unit performs arithmetic and logical operations? (a) Control Unit (b) ALU (c) Register (d) Cache 3. 1 KB is equal to: (a) 1000 bytes (b) 1024 bytes (c) 1024 bits (d) 100 bits 4. Which software acts as an interface between user and hardware? (a) Compiler (b) OS (c) ...

EMRS Computer Science Syllabus For ESSE 2025 Tier-2 Examination TGT Computer Science Computer Systems and Organisation • Basic Computer Organisation: Introduction t o computer system, hardware, software , input device, output device, CPU, memory (primary, cache and secondary), u n i t s of memory (Bit, Byte, KB, MB, GB, TB, PB), Overview of computer memory systems, including semiconductor main memory and cache memory, Advanced DRAM organization and memory hierarchy • Types of software: system software (operating systems, system utilities, device drivers), programming tools and language translators (assembler, compiler & interpreter), application software • Operating system (OS): functions of operating system, OS user interface • Boolean logic: NOT, AND, OR, NAND, N O R, XOR, truth table, De Morgan’s laws and logic circuits • Number system: Binary, Octal, Decimal and Hexadecimal number system; conversion  between number systems. • Encoding schemes: ASCII, ISCII and UNICODE (UTF8...