0 votes 0 votes which of the following is valid class of interrupts 1)program 2)timer 3)I/O 4) h/w failure a)1 and 3 b)2 and 3 c)1,2 and 4 4)None Sanjay Sharma asked Nov 5, 2016 Sanjay Sharma 821 views answer comment Share Follow See 1 comment See all 1 1 comment reply Shubham Pandey 2 commented Nov 5, 2016 reply Follow Share b is correct 0 votes 0 votes Please log in or register to add a comment.