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Question 100

Computer Awareness Central Processing Unit (CPU) Easy

To access the I/O devices the status flags is continuously checked in

(A) Program controlled I/O
(B) Memory mapped I/O
(C) I/O Mapped
(D) None of the above
✓ Correct Answer: Option A Verified Solution

📘 Step-by-Step Solution & Detailed Explanation:

In program-controlled (programmed) I/O, the CPU keeps checking the device's status flag (polling or busy-waiting) until the device is ready to transfer data.

Answer: (A)

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