. Given the following characteristics for a magnetic tape using linear recording: Density = 1600 bpi Speed = 1500 inches/second Size = 2400 feet Start/stop time = 4 ms Number of records to be stored = 200,000 records Size of each record = 160 bytes Block size = 10 logical records IBG = 0.5 inch Find the following: i. Number of blocks needed ii. Size of the block in bytes iii. Time required to read one block iv. Time required to write all of the blocks v. Amount of tape used for data only, in inches vi. Total amount of tape used (data + IBGs), in inches
. Given the following characteristics for a magnetic tape using linear recording:
Density = 1600 bpi
Speed = 1500 inches/second
Size = 2400 feet
Start/stop time = 4 ms
Number of records to be stored = 200,000 records
Size of each record = 160 bytes
Block size = 10 logical records
IBG = 0.5 inch
Find the following:
i. Number of blocks needed
ii. Size of the block in bytes
iii. Time required to read one block
iv. Time required to write all of the blocks
v. Amount of tape used for data only, in inches
vi. Total amount of tape used (data + IBGs), in inches
B. Strategies for handling deadlocks include prevention. Prevention eliminates one of four
conditions. Analyze these conditions.
C. Briefly explain the following virtual memory schemes, Paged, Demand Paged,
Segmented, Segmented/Demand Paging. Using a Table, Differentiate among them in
terms of the following categories, Problem Solved, Problem Created, Changes in
Software.
D.
i. Explain how Cache Memory is utilized with respect to the two levels that typical
microprocessor has.
ii. Given total number of requests is 10, and 6 of those are found in cache memory find
the hit ratio.
iii. Using the answer obtained from (ii) above, given that the average cache access time is
200 nanoseconds (nsec) and the average main memory access time is 1000 nsec, find
the average memory access time.
E. Differentiate between multithreading and multiprogramming.
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