Computer Organization and Architecture MCQ Quiz - Objective Question with Answer for Computer Organization and Architecture - Download Free PDF

Getting a grip on Computer Organization and Architecture is made much easier with Computer Organization and Architecture MCQs. These questions cover a wide spectrum, from the basic structure of a computer to complex architectural designs. Regular interaction with Computer Organization and Architecture MCQs helps you understand both theoretical and practical aspects of this important subject. This way, Computer Organization and Architecture MCQs can serve as a key to unlocking your potential in computer science.

Latest Computer Organization and Architecture MCQ Objective Questions

Computer Organization and Architecture Question 1:

In which of the following addressing modes the operand immediately follows the op-code?

1. Based
2. Direct
3. Indexed
4. Immediate

Answer (Detailed Solution Below)

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The correct answer is Immediate. Key Points

• Immediate Addressing Mode: In this addressing mode, the operand is specified directly in the instruction itself. This means the operand immediately follows the op-code in the instruction. For example, in an assembly instruction like ADD #5 , the value 5 is the operand and is directly included in the instruction.

Additional Information

• Based Addressing Mode: This mode uses a base register to determine the effective address of the operand. The operand’s address is obtained by adding a constant value to the contents of the base register.
• Direct Addressing Mode: In this mode, the effective address of the operand is given directly by the address field of the instruction. For example, if the instruction contains the address 1000 , the operand is located in memory at address 1000 .
• Indexed Addressing Mode: This mode uses an index register to modify the address field of the instruction. The effective address of the operand is obtained by adding the contents of the index register to the address part of the instruction.

Computer Organization and Architecture Question 2:

1. Time interrupt
2. Makeable interrupt
3. Maskable interrupt
4. Nonmaskable interrupt

Answer (Detailed Solution Below)

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Key Points

• Maskable interrupts are interrupts that can be turned off or "masked" by the control unit or software, thereby minimizing their effect on the system.
• They are used to handle less critical tasks, allowing the system to prioritize and manage more important processes.
• In contrast, nonmaskable interrupts cannot be turned off and are used for critical tasks that must be addressed immediately by the system.
• Maskable interrupts enhance the efficiency and performance of a system by managing and prioritizing tasks effectively.

Additional Information

• Interrupts are signals sent to the processor to indicate an event that needs immediate attention.
• They can be classified into various types, such as hardware interrupts and software interrupts, based on their source.
• Interrupts play a crucial role in multitasking environments by allowing the CPU to respond to events and manage multiple processes efficiently.
• Maskable interrupts are essential in systems where flexibility and control over task management are required.
• In modern computing, the effective use of maskable interrupts is critical for optimizing system performance and ensuring smooth operation.

Computer Organization and Architecture Question 3:

1. A - IV, B - II, C - III, D - I
2. A - I, B - IV, C - II, D - III
3. A - II, B - III, C - IV, D - I
4. A - III, B - I, C - II, D - IV

Answer (Detailed Solution Below)

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The correct answer is A - II, B - III, C - IV, D - IKey Points

• A. Multiplexer
  • A Multiplexer or MUX is a device that selects one input from multiple inputs. This matches with II. Selection of one input from multiple inputs.
• B. Flip-Flop
  • A Flip-Flop is a basic sequential circuit used for storing binary data. This device is essential for memory elements in digital electronics. This matches with III. Sequential circuit.
• C. ALU (Arithmetic Logic Unit)
  • The ALU performs arithmetic and logic operations inside a CPU. This matches with IV. Arithmetic and Logic operations.
• D. Register
  • A Register is used for data storage in the CPU and holds data temporarily. This matches with I. Data storage.

So the correct matches are: A - II, B - III, C - IV, D - I

Computer Organization and Architecture Question 4:

The sequence of steps for the process of handling an interrupt in a computer system is: A. Save the state of the current process B. Determine the cause of the interrupt C. Execute the interrupt service routine (ISR) D. Restore the state of the current process E. Acknowledge the interrupt Choose the correct answer from the options given below:

1. B, A, E, C, D
2. A, B, E, C, D
3. A, B, C, E, D
4. B, A, C, E, D

Answer (Detailed Solution Below)

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The correct answer is B, A, E, C, DKey Points

• B. Determine the cause of the interrupt: The system must first identify why the interrupt occurred.
• A. Save the state of the current process: Before handling the interrupt, the state of the current process (registers, program counter, etc.) must be saved so it can be resumed later.
• E. Acknowledge the interrupt: The interrupt must be acknowledged to inform the hardware that the interrupt has been noticed and will be handled.
• C. Execute the interrupt service routine (ISR): The ISR is executed to handle the interrupt.
• D. Restore the state of the current process: After the ISR is executed, the state of the current process is restored, allowing the process to resume from where it was interrupted.

Computer Organization and Architecture Question 5:

Evaluate the expression ( Z = (P - Q) / (R * S) ) using the following instructions: SUB R3, P, Q
MUL R4, R, S
DIV Z, R3, R4
In which of the following types of instruction sets are these instructions represented?

1. 2 - Address instructions
2. 3 - Address instructions
3. 1 - Address instructions
4. RISC instructions

Answer (Detailed Solution Below)

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The correct answer is 3 - Address instructions Key Points Each instruction specifies three operands: a destination and two source operands. This matches the 3-address instruction format where: SUB R3, P, Q computes R3 = P - Q
MUL R4, R, S computes R4 = R * S
DIV Z, R3, R4 computes Z = R3 / R4
This format provides flexible and direct operations with three operands. Therefore, the correct type is 3-address instructions.

Top Computer Organization and Architecture MCQ Objective Questions

Computer Organization and Architecture Question 6

Answer (Detailed Solution Below)

Computer Organization and Architecture Question 6 Detailed Solution

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The correct answer is DRAM. Key Points

• DRAM:
  • It is dynamic random access memory and is widely used as a computer's main memory. Hence, Option 2 is correct.
  • Each DRAM memory cell is made up of a transistor and a capacitor within an integrated circuit, and a data bit is stored in the capacitor.
• DDR-RAM:
  • It stands for Double Data Rate Synchronous Dynamic Random-Access Memory.
  • These are the computer memory that transfers the data twice as fast as regular chips like SDRAM chips because DDR memory can send and receive signals twice per clock cycle as a comparison.
• SRAM:
  • It stands for Static Random Access Memory.
  • It is a form of a semiconductor.
  • It is widely used in microprocessors, general computing applications, and electronic devices.
  • The SRAM is volatile in nature which means the data stored in it gets all wiped out once the power supply is cut.
  • SRAM is comprised of flip-flops.
• PRAM:
  • In computer science, a parallel random-access machine is a shared-memory abstract machine.
  • As its name indicates, the PRAM is intended as the parallel-computing analogy to the random-access machine.

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Computer Organization and Architecture Question 7

Answer (Detailed Solution Below)

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The Correct Answer is ROM. Key Points

• The permanent memory of a computer is known as ROM(Read-only memory).
• In computers and other electronic devices, read-only memory (ROM) is a form of non-volatile memory.
• After the memory unit is manufactured, data contained in ROM cannot be electronically changed. Read-only memory, also known as firmware, is useful for storing software that is rarely updated during the life of the device.
• Plug-in cartridges containing ROM can be used to distribute software applications (such as video games) for programmable computers.
• Read-only memory refers to memory that is hard-wired and cannot be modified electronically after manufactures, such as a diode matrix or a mask ROM integrated circuit (IC).

Additional Information

• The memory is permanently installed on your computer. This is a read-only memory. The working memory of a computer, also known as random-access memory. The hardware allows data to be passed through a device.
• Random-access memory (RAM) is a type of computer memory that allows data and machine code to be read and modified in any order. It is commonly used to store working data and machine code.
• A CD-ROM is a data-containing optical compact disc that has been pre-pressed. CD-ROMs are a form of read-only memory that computers can read but not write to or delete.
• The electronic circuitry that executes instructions in a computer programme is known as a central processing unit (CPU), also known as a central processor, main processor, or simply processor.

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Computer Organization and Architecture Question 8

1. Read only
2. Read and write
3. Write only
4. Depends on the system

Answer (Detailed Solution Below)

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The term RAM refers to read and write memory, that is, you can both write data into RAM and read data from RAM. Most RAM is volatile, which means that it requires a steady flow of electricity to maintain its contents. Read-only memory (ROM) refers to computer memory on which data has been prerecorded. Once data has been written onto a ROM chip, it cannot be removed and can only be read.

Computer Organization and Architecture Question 9

1. ALU and Control unit only
2. ALU, Control unit and Registers only
3. ALU, Control unit and System bus only
4. ALU, Control unit, Registers, and Internal bus

Answer (Detailed Solution Below)

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The correct answer is ALU, Control unit, Registers, and Internal bus. Key Points There are three basic units of a computer system:

1. Input Unit: Keyboard, Mouse, Scanner, Light pen, Trackball etc.
2. Central Processing Unit
3. Output Unit: Monitor and Printer

Central Processing Unit (CPU): It is the most important unit, where all the processing jobs take place. CPU is the control centre of the computer and hence it is said to be the brain of the computer. CPU has three main components:

1. Arithmetic Logic Unit (ALU): It performs all the arithmetic operations like addition (+), multiplication (*), subtraction (-), division (/) on the numerical data directed by the control unit. All the logical operations, like less than ( ), equal to (=), not equal to (≠) etc. are also carried out by ALU.
2. Control Unit (CU): It controls and coordinates all the operations taking place in the system. It controls the flow of data and information from one unit to the other.
3. Registers/Memory Unit (MU): To execute a program, data and instructions need to be stored temporarily. This storage is done in the MU. The data and instructions are retrieved from MU by Control Unit for supplying to ALU as when required by the program.
4. Internal bus: To transfer the data

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Computer Organization and Architecture Question 10

1. architecture
2. network
3. graphics
4. designing

Answer (Detailed Solution Below)

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The correct option is (1) Architecture Concept:- The organization and interconnection of the various components of the computer system are Architecture. Key Points

• A specification for how a set of software and hardware technology standards combine to build a computer system or platform is known as computer architecture.
• In a nutshell, computer architecture describes how a computer system is built and which technologies it supports.
• Computer architecture is a set of rules and procedures used in computer engineering to explain the functioning, organization, and implementation of computer systems.
• The CPU, memory input/output device, and communication channels that connect them are the primary components in a conventional computer system.

Additional Information Networks:- A network is made up of two or more computers that are connected in order to share resources, exchange files, or send and receive electronic messages.

Graphics:- A design or visual picture exhibited on a number of media, such as canvas, paper, walls, signage, or a computer monitor, is referred to as a graphic.

Designing:- Design is an art form, a technique of human expression that imbues objects through a system of highly developed procedures.