Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: I/O protection is ensured by a hardware trap

Reason R: I/O interrupt caused by the condition like I/O completion and device malfunction occuring within the I/O devices

In the light of the above statements, choose the correct answer from the options given below.

This question was previously asked in
UGC NET Computer Science (Paper 2) 17 June 2023 Official Paper
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  1. Both A and R are true and R is the correct explanation of A
  2. Both A and R are true but R is NOT the correct explanation of A
  3. A is true but R is false
  4. A is false but R is true

Answer (Detailed Solution Below)

Option 4 : A is false but R is true
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UGC NET Paper 1: Held on 21st August 2024 Shift 1
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Detailed Solution

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The correct answer is A is false but R is true

Key Points

  •  Assertion A:
    • I/O protection is ensured by a hardware trap is not true because  I/O protection is ensured by operating system routines.
    • This is usually part of the kernel's responsibility, the core component of most operating systems. Kernel takes care of input/output (I/O) operations to ensure that they are performed safely, efficiently, and in accordance with the permissions of the active processes and users.
    • This way, the operating system helps to prevent unauthorized access to I/O devices and maintains system integrity and security.
  • Reason R:
    • I/O interrupt caused by the condition like I/O completion and device malfunction occuring within the I/O devices is true because an I/O interrupt can be triggered by events such as I/O completion and device malfunctions.
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