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Scan gawker calculated

Hello friends, welcome to Gate Smashers, the topic is SCAN algorithm in disk scheduling so here we start from the questions and here 200 tracks are already given in the disk 0 to 199 and I have the request queue these are the request which are already present in the queue current position is from 50 and now I am using the algorithm SCAN So how does the scan algorithm works? Lets start with the and here first of all I have 50 that is the current position of read write head and the scan algorithm is also called elevator algorithm where we have to move in one direction and and we have to move till last point in that direction so what does this mean? So here I have direction in this question, that is I think I forgot to write the direction direction you can take as lets say direction is towards the larger value You have been given like this, Lets say direction is towards larger value so from 50 we have to move towards larger value So if we move from 50 towards larger value so which value comes first? 82 So I covered 82 after 82 which is the next request coming? 140 and after 140 next request is 170 170 after 170, the next request I have is 190 So I want to say that after 50 here I have to move towards larger direction and while moving towards that direction what all the request that have come and you handle all those request means all the request what was it? 82, 140 170, 190 so I have handled all these requests means I will service all these request but this scan algorithm is called elevator algorithm because it will not go upto 190 only but will go upto 199, this means so the direction in which you are moving you have to move till the last point in that direction If you have in the question that you have to move from 50 towards the lower value so where will you go from 50 from 50 to 43 after 43 you move to 24 after 24 to 16 and after 16 upto 0 you have to go in the track number till the very last value. so here what is the larger value, which is given in the question so we first solve the according to the larger value so went to 199 now up to 199 we have covered all the values from 50 to 199 but after 199 now we are changing direction. now which value was less than 50 ? 43 so I’m covering 43 over here what is the value after 43 ? 24 so am covering 24 what is the value after 24 ? 16 so I am covering 16 and another point to keep in mind here stop here after coming to 16 now here you do not have to go to zero means to say this...