2 votes 2 votes I think answer would be option d but it is given as option c, how it is option c? Piyush #### asked Mar 30, 2019 Piyush #### 763 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
Best answer 1 votes 1 votes option d is right. abhishekmehta4u answered Mar 30, 2019 • selected Mar 31, 2019 by srestha abhishekmehta4u comment Share Follow See all 6 Comments See all 6 6 Comments reply srestha commented Mar 30, 2019 reply Follow Share @abhishekmehta4u as options are given , we can answer d) but if options not given can we backcalculate it? 1 votes 1 votes abhishekmehta4u commented Mar 30, 2019 reply Follow Share Yes mam we can do in reverse order . 0 votes 0 votes srestha commented Mar 30, 2019 reply Follow Share how reverse order? Can u plz show me, how without option can be solved? 0 votes 0 votes Piyush #### commented Mar 30, 2019 reply Follow Share If options are not given then try to get the sequence by applying clocks to the given value, As here 1010 was given if we apply a clock we will get 0101 and again if we apply a clock to 0101 we will get 1010 and this keeps on repeating. 0 votes 0 votes srestha commented Mar 31, 2019 reply Follow Share @Piyush #### how $1010$ to $0101$? when we go backward, we can say it is a left shift right? and leftshift gives 1 as result So, how will it get o and 1 simulteneously? 0 votes 0 votes Piyush #### commented Mar 31, 2019 reply Follow Share @srestha you cannot go backward as if you do left shift one cant predict whether the bit which is going to come at lsb will be 0 or 1 , so the idea of going backward and solving wont be a good option , so as in the given question you apply clock after 1010 1st clock 0101 2nd clock 1010 3rd clock 0101 4th clock 1010 2n-1 clock 0101 2n clock 1010 so it is having a sequence by this you could predict what was the content of the register 3 clocks back (Asked in the question) and this is how we will get 0101 as the answer. 0 votes 0 votes Please log in or register to add a comment.