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DSSSB TGT / PGT · Computer Science

Computer Organization & Architecture Previous Year Questions (page 2)

63 Computer Organization & Architecture (Computer Science) questions asked in DSSSB TGT / PGT previous year papers, each with the correct answer and explanation. Read them free on UTpaper, or attempt the full papers as timed online tests.

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DBMS & SQL 229Digital Logic & Number Systems 194Computer Networks 177Operating Systems 161Data Structures 151Programming in C/C++ 89Web Technologies 68Algorithms 66Discrete Mathematics 66OOP 63Java 46E-Commerce & IT Management 41Computer Fundamentals & MS Office 34Python 29Computer Graphics & Multimedia 28Software Engineering 23Cyber Security 13AI, ML & Data Science 11
Q51DSSSB TGT Computer Science (Technical), 12 Sep 2025, Shift 1 (9:00 AM)
Which of the following is a key design goal of an Instruction Set Architecture?
  1. AMinimizing the transistor count
  2. BEnsuring only complex instructions are supported
  3. CMaximizing the instruction decode time
  4. DBalancing simplicity and performance for ease of programming and efficiency
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Correct answer: (D) Balancing simplicity and performance for ease of programming and efficiency

Explanation

An ISA is designed to balance simplicity (easy to program and to implement in hardware) against performance and efficiency. Maximising decode time or allowing only complex instructions are not goals.

Q52DSSSB TGT Computer Science, 24 Jun 2023, Shift 3 (4:30 PM)
Which of the following is NOT a type of computer architecture?
  1. AMicro Architecture
  2. BHarvard Architecture
  3. CSoftware Architecture
  4. DInstruction Set Architecture
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Correct answer: (C) Software Architecture

Explanation

Computer architecture includes Instruction Set Architecture, Microarchitecture and system designs such as Harvard and von Neumann. Software architecture is a software-engineering concept, not a computer architecture type.

Q53DSSSB TGT Computer Science, 24 Jun 2023, Shift 3 (4:30 PM)
______ is a code that consists of CPU and platform-independent set of instructions, which can be easily converted to the native code.
  1. ADLL
  2. BFCL
  3. CJIT
  4. DMSIL
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Correct answer: (D) MSIL

Explanation

MSIL (Microsoft Intermediate Language, also called CIL) is CPU-independent code produced by .NET compilers. The JIT compiler converts it to native code at run time.

Q54DSSSB TGT Computer Science, 24 Jun 2023, Shift 3 (4:30 PM)
The set of processes developed in an organisation to create, gather, store, transfer and apply knowledge best describes:
  1. Aknowledge management
  2. Borganisational learnings
  3. Cknowledge asset
  4. Dorganisational memory
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Correct answer: (A) knowledge management

Explanation

Knowledge management is the set of processes to create, gather, store, transfer and apply knowledge in an organisation.

Q55DSSSB TGT Computer Science, 7 Feb 2024, Shift 2 (12:30 PM)
Which of the following is characteristic of a RISC (Reduced Instruction Set Computer) processor?
  1. AMicroprogrammed control
  2. BInstruction that manipulate operands in memory
  3. CFixed-length, easily decoded instruction format
  4. DA large number (typically from 100 to 250) of instructions
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Correct answer: (C) Fixed-length, easily decoded instruction format

Explanation

RISC processors use simple, fixed-length instructions that are easy to decode, with hardwired control and few instructions. Microprogrammed control, memory operands and 100-250 instructions are CISC traits.

Q56DSSSB TGT Computer Science, 7 Feb 2024, Shift 2 (12:30 PM)
In Direct Memory Access (DMA) ______, a block sequence consisting of a number of memory words is transferred in a continuous burst.
  1. ABus granting
  2. BBurst transfer
  3. CCycle stealing
  4. DController count
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Correct answer: (B) Burst transfer

Explanation

In DMA burst transfer, a block of several memory words is sent in one continuous burst while the DMA controller holds the bus. Cycle stealing transfers one word at a time.

Q57DSSSB TGT Computer Science, 25 Jun 2023, Shift 3 (4:30 PM)
What is the main advantage of using linked lists over arrays in data structures?
  1. ALinked lists have faster access time than arrays for large data sets.
  2. BLinked lists use less memory than arrays.
  3. CLinked lists can be resized more easily than arrays.
  4. DLinked lists are more efficient for inserting and deleting elements at any position.
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Correct answer: (D) Linked lists are more efficient for inserting and deleting elements at any position.

Explanation

Inserting or deleting in a linked list only changes pointers (O(1) once the position is known). In an array, elements have to be shifted.

Q58DSSSB TGT Computer Science, 25 Jun 2023, Shift 3 (4:30 PM)
The three main parts of central processing unit (CPU processor) are:
  1. Acache, ALU and RAM
  2. Bcontrol unit, RAM and cache
  3. CALU, control unit and registers
  4. DALU, control unit and RAM.
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Correct answer: (C) ALU, control unit and registers

Explanation

The CPU has the ALU (arithmetic and logic), the control unit (directs operations) and registers (fast internal storage). RAM and cache sit outside this core.

Q59DSSSB TGT Computer Science, 25 Jun 2023, Shift 3 (4:30 PM)
Which of the following methods is NOT used for data transfer between peripherals and memory?
  1. AProgrammed I/O
  2. BPipelining
  3. CInterrupt Initiated I/O
  4. DDirect Memory Access
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Correct answer: (B) Pipelining

Explanation

Pipelining speeds up the CPU by overlapping instruction stages. Programmed I/O, interrupt-initiated I/O and DMA are the three methods of transferring data between peripherals and memory.

Q60DSSSB TGT Computer Science, 25 Jun 2023, Shift 2 (12:30 PM)
Which architecture is the most energy efficient?
  1. ACISC
  2. BIANA
  3. CISA
  4. DRISC
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Correct answer: (D) RISC

Explanation

RISC processors use a small set of simple, fixed-length instructions that need less complex decoding hardware, so they use less power. ARM chips in mobiles are an example. CISC needs more transistors and power.

Q61DSSSB TGT Computer Science, 25 Jun 2023, Shift 2 (12:30 PM)
Memory that does not change its contents due to external causes is referred to as:
  1. Adynamic memory
  2. Bfixed memory
  3. Cstatic memory
  4. Dtemporary memory
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Correct answer: (C) static memory

Explanation

Static memory (like SRAM) keeps its contents unchanged as long as power is on, without refreshing. Dynamic memory (DRAM) leaks charge and must be refreshed regularly.

Q62DSSSB TGT Computer Science, 25 Jun 2023, Shift 2 (12:30 PM)
A computer bus line is made up of which of the following components?
  1. ARegisters
  2. BSet of parallel lines
  3. CAccumulators
  4. DRAM and ROM
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Correct answer: (B) Set of parallel lines

Explanation

A bus is a set of parallel wires (lines) that carry data, address and control signals between computer components at the same time.

Q63DSSSB TGT Computer Science, 25 Jun 2023, Shift 2 (12:30 PM)
Which storage media supports only sequential access?
  1. AHard disk
  2. BCD
  3. CMagnetic tape
  4. DDVD
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Correct answer: (C) Magnetic tape

Explanation

Magnetic tape allows only sequential access: to reach a record, the tape must wind past everything before it. Hard disks, CDs and DVDs allow direct (random) access.

How to use these DSSSB TGT / PGT Computer Science questions

Every question here was asked in a real DSSSB TGT / PGT paper; the paper and shift are shown on the card, and the number opens the question on its own page. Try each one before tapping Show answer, then attempt the full DSSSB TGT / PGT papers as timed tests to check your speed under exam conditions.

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