In 8086, example for non maskable interrupts is:

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LPSC ISRO Technical Assistant Electronics 07 Aug 2016 Official Paper

Answer 1

Important Comparision:

MASKABLE INTERRUPT	NON MASKABLE INTERRUPT
Can be masked or made pending	Cannot be masked or made pending
Lower priority than non-maskable interrupt	Higher priority than maskable interrupt
May be vectored and non-vectored	All are vectored
Used to interface with peripheral device	Used for emergency purpose
RST 6.5, RST 7.5 and RST 5.5 are examples of maskable interrupts	TRAP of 8086 is an example of Non Maskable interrupt.