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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.
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?
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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.
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.
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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?
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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?.
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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.
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