0 votes 0 votes Why option A is wrong ? It is contiguous allocation policy hence suffers fragmentation. HeadShot asked Nov 6, 2018 HeadShot 1.4k views answer comment Share Follow See all 2 Comments See all 2 2 Comments reply Shamim Ahmed commented Nov 6, 2018 reply Follow Share I think its speaking about Direct Mapping in cache memory. If that is the case then choice C is the correct option. 1 votes 1 votes Srestha Sharma commented Nov 6, 2018 reply Follow Share I think they are talking about FAT with linked allocations, as in linked allocation with FAT can have direct access but suffers internal fragmentation.(I MAY BE WRONG) 0 votes 0 votes Please log in or register to add a comment.
Best answer 1 votes 1 votes Direct access method: It is a data access method, not a data allocation method. We compare direct access methods with sequential access methods In sequential access method, you are starting from the beginning and going through the entire record till you find the data needed. Direct access method (also known as random access method), you can retrieve the data directly from where it is physically located. Thus allowing you to access files in no particular order. Dhillu Thambi answered Nov 6, 2018 • selected Nov 6, 2018 by HeadShot Dhillu Thambi comment Share Follow See all 2 Comments See all 2 2 Comments reply HeadShot commented Nov 6, 2018 reply Follow Share Dhillu Thamb Say its not about "Direct mapping" in cache.. Then , without contiguous allocation , how random access possible ? 0 votes 0 votes Dhillu Thambi commented Nov 6, 2018 reply Follow Share Since both the Contiguous and Indexed allocation methods supports direct access. And the question is aimed towards the "memory access" since you're using it for the memory access, thus not resulting in any fragmentation. 1 votes 1 votes Please log in or register to add a comment.
0 votes 0 votes It need not be always contiguous, indexed allocation has also both sequential and random(direct) access where as linked allocation is only sequential... SunnyCS answered Nov 6, 2018 SunnyCS comment Share Follow See all 0 reply Please log in or register to add a comment.