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GATE 2019 - Computer Organization Quiz-7 ( Memory Organization ) (App update required to attempt this test)
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Question 1
Assume that for a certain processor, a read request takes 50 nanoseconds on a cache miss and 5 nanoseconds on a cache hit. Suppose while running a program, it was observed that 80% of the processor's read requests result in a cache hit. The average read access time in nanoseconds is _________.
Question 2
Consider the following parameters for disk system.
• Seek time is 6 ms per cylinder
• Disk request for cylinders 8, 24, 20, 5, 41, 8 in that order come into the driver
• Initially disk arm is at cylinder 20.
What is the total seek time for the above requests using first come first serve scheduling (in ms)?
• Seek time is 6 ms per cylinder
• Disk request for cylinders 8, 24, 20, 5, 41, 8 in that order come into the driver
• Initially disk arm is at cylinder 20.
What is the total seek time for the above requests using first come first serve scheduling (in ms)?
Question 3
A 4-way set-associative cache memory unit with a capacity of 16 KB is built using a block size of 8 words. The word length is 32 bits. The size of the physical address space is 4 GB. The number of bits for the TAG field is ____
Question 4
When computer is switched on a program called bootstrap loader is activated whose function to start the computer software operating. In which storage is this program stored.
Question 5
All dynamic memories have to be refreshed. A typical DRAM take 64 ms to refresh. Suppose there are 8 K rows and it takes four clock cycles to access each row. If the clock rate is 133 MHz, find the refresh overhead in terms of percentage.
Question 6
For a 4-way set associative cache, 10 bits are required as index to specify cache block. The main memory is of size 4G x 32 bits. Size of cache memory is____ ( bits )
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