Mathematics · Computer Organization and Architecture
Which of the following statements are true regarding I/O organization? (i) Programmed I/O is more efficient than interrupt-initiated I/O in terms of CPU utilization. (ii) Interrupt-initiated I/O is more efficient than programmed I/O in terms of CPU utilization. (iii) DMA transfer is based on checking input and output flags by the CPU. (iv) DMA transfer is used to perform data transfer directly between memory and I/O devices.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1(ii) and (iv) only✓
- 2(ii) and (iii) only
- 3(i) and (iv) only
- 4(i) and (iii) only
Correct answer
(ii) and (iv) only
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