Operating System
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Question 1 of 38
1. Question
External Fragmentation is a disadvantage of one of the following memory allocation schemes
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Question 2 of 38
2. Question
What is not true about Operating systems
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Question 3 of 38
3. Question
Match the following in the given sequences
i-Single contiguous allocation a. active processes shifts to one end to combine holes ii-Fixed partitioned allocation b. allots requisite space required by new process in consecutive areas until it fit into remaining area iii-Variable partitioned allocation c. predetermined partitioning of memory iv- Relocatable portioned allocation d. uniprogramming Correct
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Question 4 of 38
4. Question
Match the following in the given sequences
i-Single contiguous allocation a. wastage of time and memory ii-Fixed partitioned allocation b. leads to external fragmentation iii-Variable partitioned allocation c. leads to internal fragmentation iv- Relocatable portioned allocation d. leads to address dependent problems Correct
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Question 5 of 38
5. Question
What is not true about segmentation
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Question 6 of 38
6. Question
Which of the following is true for Page stealing
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Question 7 of 38
7. Question
Match the following in the given sequence
i-LRU a. page moved in first should be moved out first ii-NRU b. not used in recent times iii-FIFO c. being used rarely iv- LFU d. has not been used in recent times Correct
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Question 8 of 38
8. Question
Match the following in the given sequence
i-Page number a. available or not available ii-Block Number b. moved back to secondary memory or not iii-Status c. main memory partitions iv-Judgement d. job address space partitions Correct
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Question 9 of 38
9. Question
What is not true about virtual memory
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Question 10 of 38
10. Question
Match the following in the given sequence
i.Processor a. instance of program in execution ii.Process b. Hardware component capable of executing process iii.Process Management c. keeps track of status of each process iv.Program d. passive entity on memory Correct
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Question 11 of 38
11. Question
A process structure in the OS contains
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Question 12 of 38
12. Question
Match the following in the given sequence
i-New a. resources are yet to be assigned ii-Ready b. The process is waiting for the processor iii-Blocked c. waiting for a I/O completion iv-Run d. selected by CPU for execution v-Terminated e. finishes execution Correct
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Question 13 of 38
13. Question
A process can follow the sequence in order
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Question 14 of 38
14. Question
Which of the following are reasons for context switching
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Question 15 of 38
15. Question
Match the following in the given sequence
i-Throughput a. total time spent in ready queue ii-Turnaround time b. completion time minus submission time iii-Waiting Time c. How many processes per unit time iv-Response time d. percentage use of CPU v-CPU utilization e. first response minus submission time Correct
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Question 16 of 38
16. Question
The CPU Scheduling is preemptive in the case of
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Question 17 of 38
17. Question
The average waiting time for FCFS scheduling for the following process is P1-1 minute
P2-10 minute
P3-10 minuteCorrect
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Question 18 of 38
18. Question
The average waiting time for non-preemptive SJF scheduling for the following process is
P1-1 minute
P2-20 minute
P3-10 minuteCorrect
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Question 19 of 38
19. Question
Monopoly of the process happens in
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Question 20 of 38
20. Question
File manager does not do the task of
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Question 21 of 38
21. Question
Which one of the following are Archive file types
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Question 22 of 38
22. Question
When you write a program in a high level language and want to execute it, the right path sequence it may follow is
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Question 23 of 38
23. Question
To find the cluster size in DOS we use
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Question 24 of 38
24. Question
The entry in the FAT corresponding to each cluster does not contain
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Question 25 of 38
25. Question
Match the following in context of UNIX
i-Compulsory file system a. Boot block ii-Beginning of file system b. root file system iii-Origin of unix c. Bell labs iv- rwxrwxrwx d. file permissions for security Correct
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Question 26 of 38
26. Question
10th Inode entry in UNIX points to
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Question 27 of 38
27. Question
If owner decides to have read, write and execute permissions for him and read permission to group and others then file will have permission
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Question 28 of 38
28. Question
The sequence of Unix volume structure is
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Question 29 of 38
29. Question
Which is true out of the following
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Question 30 of 38
30. Question
One of the following is not true about Device Manager
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Question 31 of 38
31. Question
Match the following in the given sequence
i-I/O Channels a. needed for disparity between speed of I/O devices and CPU ii-Interrupts b. generates interrupts due to problem in hardware iii-System Calls c. function to invoke the kernel service iv-Hardware faults d. facility for a device to notify CPU Correct
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Question 32 of 38
32. Question
Arrange the following in the sequence they will happen
a. DMA controller directly accesses the memory to obtain data
b. CPU relinquishes control of system bus
c. DMA sends a notification to CPU
d. A program instructs the DMA to transfer data from memory to I/O deviceCorrect
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Question 33 of 38
33. Question
Software modules which convert logical requests of application programs into command directed to the device are called
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Question 34 of 38
34. Question
For sharing I/O devices the algorithm that can be used are
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Question 35 of 38
35. Question
If multiple jobs are there sharing access to a device but only one can access the device at one time then it is called
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Question 36 of 38
36. Question
In case of Unix File System , how many pointers from I node are needed to access memory size of 40,000 bytes of data (Let one pointer= 4bytes, 1 block = 512 bytes)
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Question 37 of 38
37. Question
Which data modeling method is called high level modeling
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Question 38 of 38
38. Question
Match the following
i-key column a. underlined ii-Multivalued b. double lined eclipse ii-Composite attribute c. eclipse from eclipse iv-partial relationship d. double lining v-total relationship e. single lining Correct
Incorrect