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GATE CS 2022: Operating System-2 (App update required to attempt this test)
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Question 1
Consider the following snapshot of a given system :
If the available is (3, 3, 2) which of the following order of execution of the processes ensures safety in the system?
Question 2
Consider the following table
Find the average turn around time when processes are scheduled with SRTF
| Process | P1 | P2 | P3 | P4 |
| Arrival Time | 0 | 1 | 2 | 3 |
| Service Time | 6 | 3 | 1 | 4 |
Find the average turn around time when processes are scheduled with SRTF
Question 3
Which of the following is not a valid Deadlock prevention scheme?
Question 4
Unix Style I node has 12 direct pointers, 2 double indirect pointers, 1 triple indirect and 1 quadruple indirect pointers. Disk block is of size 2KB. If the maximum file size for the given I-Node is 8 Tera bytes, than how many bits and required to address the disk block, for the given disk?
Question 5
Consider a paging system with 48 bit virtual address space. Each address defers to a byte in memory. Suppose the size of page is 16 kB and the main memory size is 16 GB. Each page table entry contains frame number and 2 protection bits, 1 valid bit and 1 dirty bit. The minimum size of page table ______ (in GB)
Question 6
Consider the following table
If the CPU scheduling policy is SJF with pre-emption, the average waiting time will be?
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Jun 11GATE & PSU CS
