In a general purpose computer system the CPU, the main memory and the cache may be interconnected via one or more shared system bus(es). However, input/output devices (eg. Hard disk, network interfaces) may only be connected to the system bus through an I/O controller. The following are four statements regarding the requirement for an I/O controller.1. The capacities of I/O devices are magnitude order larger than that of main memory and hence direct interfacing is impossible.2. The response times of I/O devices are magnitude order slower than that of CPU and hence direct interfacing is impossible.3. It is always better to off load the I/O processing to a secondary processor on the I/O controller board then to depend on the primary CPU for I/O processing.4. The variety of I/O devices in the market requires that a separate I/O controller exist for each device.Q. What statement(s) best explain the requirement for an I/O controller?a)Only 1 is trueb)Only 3 is truec)Only 2, 3 are trued)Only 2, 3, 4 are trueCorrect answer is option 'D'. Can you explain this answer? - EduRev Computer Science Engineering (CSE) Question

Explore Courses UPSC Exam UPSC Test Series Free Notes EduRev Infinity

Open App

Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > In a general purpose computer system the CPU,...

Join the Discussion on the App

In a general purpose computer system the CPU, the main memory and the cache may be interconnected via one or more shared system bus(es). However, input/output devices (eg. Hard disk, network interfaces) may only be connected to the system bus through an I/O controller. The following are four statements regarding the requirement for an I/O controller.
1. The capacities of I/O devices are magnitude order larger than that of main memory and hence direct interfacing is impossible.
2. The response times of I/O devices are magnitude order slower than that of CPU and hence direct interfacing is impossible.
3. It is always better to off load the I/O processing to a secondary processor on the I/O controller board then to depend on the primary CPU for I/O processing.
4. The variety of I/O devices in the market requires that a separate I/O controller exist for each device.

Q. What statement(s) best explain the requirement for an I/O controller?

a)
Only 1 is true
b)
Only 3 is true
c)
Only 2, 3 are true
d)
Only 2, 3, 4 are true

Correct answer is option 'D'. Can you explain this answer?

FREE This question is part of

Test: Secondary Memory & DMA- 2

Attempt Test

Attempt this Test

Most Upvoted Answer

In a general purpose computer system the CPU, the main memory and the ...

Explanation of I/O Controller Requirement
The correct answer is option 'D', which states that only statements 2, 3, and 4 are true. Here's a detailed breakdown of each statement:
Statement 1: Capacities of I/O Devices
- This statement is misleading. While it's true that some I/O devices like hard disks have larger capacities than main memory, this does not inherently necessitate an I/O controller for interfacing. Direct connections are possible, though impractical due to other factors.
Statement 2: Response Times of I/O Devices
- True. I/O devices typically have slower response times compared to CPUs. If direct interfacing were attempted, the CPU would spend excessive time waiting for I/O operations to complete, thereby reducing overall system performance.
Statement 3: Offloading I/O Processing
- True. Using a secondary processor on the I/O controller allows for more efficient handling of I/O tasks. This frees the primary CPU for processing tasks, enhancing system performance and responsiveness.
Statement 4: Variety of I/O Devices
- True. The diverse range of I/O devices necessitates specialized controllers to handle different protocols and communication methods. This specialization ensures compatibility and efficiency in data transfer.
Conclusion
In summary, statements 2, 3, and 4 accurately reflect the rationale behind the need for an I/O controller in computer systems, supporting effective data management and system performance.

Answered by Gate Gurus · View profile

Attention Computer Science Engineering (CSE) Students!

To make sure you are not studying endlessly, EduRev has designed Computer Science Engineering (CSE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Computer Science Engineering (CSE).

GATE Computer Science Engineering(CSE) 2025 Mock Test Series

Question Bank for GATE Computer Science Engineering

General Aptitude for GATE

Computer Networks

View all answers Start learning for free

< Previous Question Next Question >

Explore Courses for Computer Science Engineering (CSE) exam

Similar Computer Science Engineering (CSE) Doubts

Direction: Two Statements I and II are given. These statements may be either independent causes or may be effects of independent causes or a common cause. One of these statements may be the effect of the other statements. Read both statements and decide which of the following answer choice correctly depicts the relationship between these two statements:Statement I. A large number of Primary Schools in the rural areas are run by only one teacher.Statement II. There has been a huge dropout from the primary schools in rural areas.

View answer

Which among the following is incorrect about DMA?

View answer

What is the function of 8255 chip?

View answer

The controller uses _____ to help with the transfers when handling network interfaces.

View answer

What steps have to be followed for interfacing a sensor to a micro controller 8051?

View answer

Top Courses for Computer Science Engineering (CSE)View all

GATE Computer Science Engineering(CSE) 2025 Mock Test Series

Question Bank for GATE Computer Science Engineering

General Aptitude for GATE

Computer Networks

Programming and Data Structures

Top Courses for Computer Science Engineering (CSE)

View all

In a general purpose computer system the CPU, the main memory and the cache may be interconnected via one or more shared system bus(es). However, input/output devices (eg. Hard disk, network interfaces) may only be connected to the system bus through an I/O controller. The following are four statements regarding the requirement for an I/O controller.1. The capacities of I/O devices are magnitude order larger than that of main memory and hence direct interfacing is impossible.2. The response times of I/O devices are magnitude order slower than that of CPU and hence direct interfacing is impossible.3. It is always better to off load the I/O processing to a secondary processor on the I/O controller board then to depend on the primary CPU for I/O processing.4. The variety of I/O devices in the market requires that a separate I/O controller exist for each device.Q. What statement(s) best explain the requirement for an I/O controller?a)Only 1 is trueb)Only 3 is truec)Only 2, 3 are trued)Only 2, 3, 4 are trueCorrect answer is option 'D'. Can you explain this answer?

Share with a Friend

Answer this doubt

Question Description
In a general purpose computer system the CPU, the main memory and the cache may be interconnected via one or more shared system bus(es). However, input/output devices (eg. Hard disk, network interfaces) may only be connected to the system bus through an I/O controller. The following are four statements regarding the requirement for an I/O controller.1. The capacities of I/O devices are magnitude order larger than that of main memory and hence direct interfacing is impossible.2. The response times of I/O devices are magnitude order slower than that of CPU and hence direct interfacing is impossible.3. It is always better to off load the I/O processing to a secondary processor on the I/O controller board then to depend on the primary CPU for I/O processing.4. The variety of I/O devices in the market requires that a separate I/O controller exist for each device.Q. What statement(s) best explain the requirement for an I/O controller?a)Only 1 is trueb)Only 3 is truec)Only 2, 3 are trued)Only 2, 3, 4 are trueCorrect answer is option 'D'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about In a general purpose computer system the CPU, the main memory and the cache may be interconnected via one or more shared system bus(es). However, input/output devices (eg. Hard disk, network interfaces) may only be connected to the system bus through an I/O controller. The following are four statements regarding the requirement for an I/O controller.1. The capacities of I/O devices are magnitude order larger than that of main memory and hence direct interfacing is impossible.2. The response times of I/O devices are magnitude order slower than that of CPU and hence direct interfacing is impossible.3. It is always better to off load the I/O processing to a secondary processor on the I/O controller board then to depend on the primary CPU for I/O processing.4. The variety of I/O devices in the market requires that a separate I/O controller exist for each device.Q. What statement(s) best explain the requirement for an I/O controller?a)Only 1 is trueb)Only 3 is truec)Only 2, 3 are trued)Only 2, 3, 4 are trueCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a general purpose computer system the CPU, the main memory and the cache may be interconnected via one or more shared system bus(es). However, input/output devices (eg. Hard disk, network interfaces) may only be connected to the system bus through an I/O controller. The following are four statements regarding the requirement for an I/O controller.1. The capacities of I/O devices are magnitude order larger than that of main memory and hence direct interfacing is impossible.2. The response times of I/O devices are magnitude order slower than that of CPU and hence direct interfacing is impossible.3. It is always better to off load the I/O processing to a secondary processor on the I/O controller board then to depend on the primary CPU for I/O processing.4. The variety of I/O devices in the market requires that a separate I/O controller exist for each device.Q. What statement(s) best explain the requirement for an I/O controller?a)Only 1 is trueb)Only 3 is truec)Only 2, 3 are trued)Only 2, 3, 4 are trueCorrect answer is option 'D'. Can you explain this answer?.

Solutions for In a general purpose computer system the CPU, the main memory and the cache may be interconnected via one or more shared system bus(es). However, input/output devices (eg. Hard disk, network interfaces) may only be connected to the system bus through an I/O controller. The following are four statements regarding the requirement for an I/O controller.1. The capacities of I/O devices are magnitude order larger than that of main memory and hence direct interfacing is impossible.2. The response times of I/O devices are magnitude order slower than that of CPU and hence direct interfacing is impossible.3. It is always better to off load the I/O processing to a secondary processor on the I/O controller board then to depend on the primary CPU for I/O processing.4. The variety of I/O devices in the market requires that a separate I/O controller exist for each device.Q. What statement(s) best explain the requirement for an I/O controller?a)Only 1 is trueb)Only 3 is truec)Only 2, 3 are trued)Only 2, 3, 4 are trueCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Computer Science Engineering (CSE). Download more important topics, notes, lectures and mock test series for Computer Science Engineering (CSE) Exam by signing up for free.

Here you can find the meaning of In a general purpose computer system the CPU, the main memory and the cache may be interconnected via one or more shared system bus(es). However, input/output devices (eg. Hard disk, network interfaces) may only be connected to the system bus through an I/O controller. The following are four statements regarding the requirement for an I/O controller.1. The capacities of I/O devices are magnitude order larger than that of main memory and hence direct interfacing is impossible.2. The response times of I/O devices are magnitude order slower than that of CPU and hence direct interfacing is impossible.3. It is always better to off load the I/O processing to a secondary processor on the I/O controller board then to depend on the primary CPU for I/O processing.4. The variety of I/O devices in the market requires that a separate I/O controller exist for each device.Q. What statement(s) best explain the requirement for an I/O controller?a)Only 1 is trueb)Only 3 is truec)Only 2, 3 are trued)Only 2, 3, 4 are trueCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of In a general purpose computer system the CPU, the main memory and the cache may be interconnected via one or more shared system bus(es). However, input/output devices (eg. Hard disk, network interfaces) may only be connected to the system bus through an I/O controller. The following are four statements regarding the requirement for an I/O controller.1. The capacities of I/O devices are magnitude order larger than that of main memory and hence direct interfacing is impossible.2. The response times of I/O devices are magnitude order slower than that of CPU and hence direct interfacing is impossible.3. It is always better to off load the I/O processing to a secondary processor on the I/O controller board then to depend on the primary CPU for I/O processing.4. The variety of I/O devices in the market requires that a separate I/O controller exist for each device.Q. What statement(s) best explain the requirement for an I/O controller?a)Only 1 is trueb)Only 3 is truec)Only 2, 3 are trued)Only 2, 3, 4 are trueCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for In a general purpose computer system the CPU, the main memory and the cache may be interconnected via one or more shared system bus(es). However, input/output devices (eg. Hard disk, network interfaces) may only be connected to the system bus through an I/O controller. The following are four statements regarding the requirement for an I/O controller.1. The capacities of I/O devices are magnitude order larger than that of main memory and hence direct interfacing is impossible.2. The response times of I/O devices are magnitude order slower than that of CPU and hence direct interfacing is impossible.3. It is always better to off load the I/O processing to a secondary processor on the I/O controller board then to depend on the primary CPU for I/O processing.4. The variety of I/O devices in the market requires that a separate I/O controller exist for each device.Q. What statement(s) best explain the requirement for an I/O controller?a)Only 1 is trueb)Only 3 is truec)Only 2, 3 are trued)Only 2, 3, 4 are trueCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of In a general purpose computer system the CPU, the main memory and the cache may be interconnected via one or more shared system bus(es). However, input/output devices (eg. Hard disk, network interfaces) may only be connected to the system bus through an I/O controller. The following are four statements regarding the requirement for an I/O controller.1. The capacities of I/O devices are magnitude order larger than that of main memory and hence direct interfacing is impossible.2. The response times of I/O devices are magnitude order slower than that of CPU and hence direct interfacing is impossible.3. It is always better to off load the I/O processing to a secondary processor on the I/O controller board then to depend on the primary CPU for I/O processing.4. The variety of I/O devices in the market requires that a separate I/O controller exist for each device.Q. What statement(s) best explain the requirement for an I/O controller?a)Only 1 is trueb)Only 3 is truec)Only 2, 3 are trued)Only 2, 3, 4 are trueCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice In a general purpose computer system the CPU, the main memory and the cache may be interconnected via one or more shared system bus(es). However, input/output devices (eg. Hard disk, network interfaces) may only be connected to the system bus through an I/O controller. The following are four statements regarding the requirement for an I/O controller.1. The capacities of I/O devices are magnitude order larger than that of main memory and hence direct interfacing is impossible.2. The response times of I/O devices are magnitude order slower than that of CPU and hence direct interfacing is impossible.3. It is always better to off load the I/O processing to a secondary processor on the I/O controller board then to depend on the primary CPU for I/O processing.4. The variety of I/O devices in the market requires that a separate I/O controller exist for each device.Q. What statement(s) best explain the requirement for an I/O controller?a)Only 1 is trueb)Only 3 is truec)Only 2, 3 are trued)Only 2, 3, 4 are trueCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Computer Science Engineering (CSE) tests.

Explore Courses for Computer Science Engineering (CSE) exam