UGC NET CS 2018 July - II Question 97

Question 97

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97. Match the items in List - I and List - II :

List - I	List -II
(a) Interrupts which can be delayed when a much highest priority interrupt has occurred	(i) Normal
(b) Unplanned interrupts which occur while executing a program	(ii) Synchronous
(c) Source of interrupt is in phase with the system clock	(iii) Maskable
	(iv) Exception

Code :

	(a)	(b)	(c)
(1)	(ii)	(i)	(iv)
(2)	(ii)	(iv)	(iii)
(3)	(iii)	(i)	(ii)
(4)	(iii)	(iv)	(ii)

Options:

1. (1)
2. (2)
3. (3)
4. (4)

Answer : (4)

Explanation Question 97

• (a) Interrupts which can be delayed when a much highest priority interrupt has occurred → (iii) Maskable
• (b) Unplanned interrupts which occur while executing a program → (iv) Exception
• (c) Source of interrupt is in phase with the system clock → (ii) Synchronous

→ Maskable Interrupt: The hardware interrupts which can be delayed when a much highest priority interrupt has occurred to the processor.

→ Exception: unplanned interrupts while executing a program is called Exception. For example: while executing a program if we got a value which should be divided by zero is called a exception

Reference : Types of Interrupts

→ Synchronous interrupt will happen every time an instruction executes (with a given program state)
Examples of Synchronous interrupt:
– Divide by zero
– System call
– Bad pointer dereference

Reference 2 : Two types of interrupts - Synchronous / Asynchronous

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