Let the time taken to switch between user mode and kernel mode of execution be T1 while time taken to switch between two user processes be T2. Which of the following is correct ?
| A. | T1 < T2 |
| B. | T1 > T2 |
| C. | T1 = T2 |
| D. |
Nothing can be said about the, relation between T 1 and T2.
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Option: A Explanation : Click on Discuss to view users comments. |
Working set model is used in memory management to implement the concept of
| A. | Swapping |
| B. | Principal of locality |
| C. | Segmentation |
| D. | Thrashing . |
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Option: B Explanation : Click on Discuss to view users comments. |
A UNIX file system has 1 KB block, size and 4-byte disk addresses. What is the maximum file size if the inode contains ten direct block entries, one single indirect block entry, one double indirect block entry and one triple indirect block entry ?
| A. |
30 GB
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| B. |
64GB
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| C. | 16 GB |
| D. | 1 GB |
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Option: C Explanation :
Contradiction in given options
The total space in the system is about 4 GB ().
There are a total of 4194304 blocks in the system to be allocated ().
An indirect block can store 256 addresses (1024/4).
The total number of blocks that an inode can address is 16843018 ().
The maximum file size is then 17247250432 bytes or about 17 GB (16843018*1024).
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A thread is usually defined as a light weight process because an Operating System (OS) maintains smaller data structure for a thread than for a process. In relation to this, which of the following statement is correct ?
| A. | OS maintains only scheduling and accounting information for each thread. |
| B. | OS maintains only CPU registers for each thread |
| C. | OS does not maintain a separate stack for each thread. |
| D. |
OS does not maintain virtual memory state for each thread
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Option: A Explanation : Click on Discuss to view users comments. |
