computer organization quiz questions with answers

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 Computer Organization Quiz Questions With Answers

Answer the following question briefly:

Quiz-Questions

What is the main function of an I/O Module?

 For this purpose, the computer uses an Input /Output System or I/O system. This I/O system consists of two parts:(i) I/O device and (ii) I/O module. I/O device is also called a peripheral device, whereas I/O module is also known as I/O controller or controller device or simple controller. The data or program instructions are moved between the computer and its peripheral devices through the I/O module.

What does the CPU do when there is no program to run in a system network?

The CPU remains busy to do something as long as the computer is turned on. When there is no user program to run, the operating system will execute a loop that does nothing until an interrupt (break to normal executed) occurs. This loop is called the busy-wait loop or idle loop.

Write down the function of MAR in a computer system?

This register holds the address of memory where the CPU wants to read or write data. When the Central Processing Unit wants to store any type of data in the memory or reads the data of any type from the memory, it places the address of the required memory location in the Memory Address Register.

Write down the function of  MBR in a computer system?

This register holds the contents of any type of data or instruction read from, or written in memory of the system. The contents of instruction placed in this register are transferred to the Instruction Register processing, while the contents of data are transferred to the accumulator or I/O register.

What is the function of the Program Counter (PC) in a system?

This register is used to store any type of address of the next instruction to be fetched for execution in a system. When any type of instruction is fetched, the value of IP is incremented in a memory system. Thus this register always points or holds the address of the next instruction to be fetched in a system or memory.

What do you mean by a machine execution cycle?

For every instruction of the program, the control until(a part of CPU) carries out three basic operating, known as the machine cycle. It is also called the instruction cycle. These operating are:
  • Fetch Instruction
  • Decode Instruction 
  • Execute Instruction

What is computer architecture and how many different types of computer architecture exist?

Computer architecture means the construction/design of a computer. There are three principal ways to connect components in a computer network system, called 
  • Von Neumann architecture 
  • Bus architecture 
  • Multiprocessor architecture

What is the main disadvantage of Von Neumann's architecture?

Von Neumann's architecture has significant disadvantages. Its speed is dependent on the bandwidth of the data-path between the processor and memory. This is called the Von Neuman bottleneck.

Which computer architecture has an animal's backbone-like structure? 

There are many animals (e.g cat and dog) whose internal organs are attacked by a backbone. Bus-based computers system are structured like that-processors and memory is connected to a backbone bus that acts as a ''superhighway'' for any type of data or instruction to move between processors and memory.

What is multiprocessing?

In a multiprocessing system, two or more general-purpose processors work together. Therefore in this type of system, multi programs(more than one program) can be executed on different processors at the same time. This type of processing is known as multiprocessing.

What is asymmetric multiprocessing?

The multiprocessing system, in which each processor is assigned a specific task in a system process, is known as Asymmetric Multiprocessesing System. For example, one processor is dedicated to handling user's requests, the second processor is dedicated to running application programs, and the third processor is dedicated to image processing, and so on.

What is symmetric multiprocessing?

The multiprocessing system, in which multiple processors work together on the same task in a system, is known as Symmetric Multiprocessing System. In this system, each processor can perform all types of tasks in a system. All professors are treated equally and no master-slave relationship exists between the processors.

What are clustered system?

A clustered system is another form of a multiprocessing system. This type of system contains multiple processors but the design differs from multiprocessors system. The clustered system consists of two or more individual systems that are coupled together for processing. In clustered systems, individual systems (or clustered computers) share the same storage and are linked together via Local Area Network (LAN).

What are the different types of clustered systems?

Like multiprocessing systems, the clustered system can also be of two types:
  • Asymmetric Clustered System 
  • Symmetric Clustered System
In an asymmetric clustered system, one machine is in hot-standby mode while the other machine is running the application in a system. The hot-standby host machine monitors the active sever properly. If the server fails or not working, the hot-standby machine becomes the active server in a system.
In symmetric clustered systems, multiple hosts (machines) run the applications. They also monitor each other. This mode is more efficient than an asymmetric system, becomes it uses all the available hardware.

Which is also known as the brain of the computer?

Processor

Which is not a permanent storage device?

Main Memory

Which may exchange data between main memory and I/O devices?

I/O modules

Which registers holds the address of the active memory location that is being currently accessed by the CPU?

MAR

Which registers are used for exchange data between I/O modules and the processor?

I/O BR

Which of the following registers specifics a particular I/O device?

I/O AR

Which of the following registers holds the contents of data or instruction read from memory?

MBR

Which registers hold the address of an instruction that is to be fetched next by the CPU?

Instruction Pointer

Which register holds the current instruction that is being executed in a system?

Instruction Registers

Which register is located inside the ALU?

Accumulator

The term First-In and Las-Out is used for?

Stack Control Register

How many basic operations are carried out by the CPU?

4 operations

Which of the following is a single-tasking operating system?

DOS

The system bus is composed of the data bus, control bus, and?

Address bus

Which of the following is an animal's backbone like architecture?

Bus architecture

A multiprocessing system in which each processor performs a specific task is said to be as?

Asymmetric multiprocessing

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