OS Part 1 4

1. 1With paging there is no _____ fragmentation

   1. Aeither type of
   2. Bnone of the above
   3. Cexternal
   4. Dinternal
2. 2The address of a page table in memory is pointed by:

   1. Apage table base register
   2. Bstack pointer
   3. Cpage register
   4. Dprogram counter
3. 3What is a medium-term scheduler?

   1. Ait selects which process has to be executed next and allocates CPU
   2. Bnone of the above
   3. Cit selects which process has to be brought into the ready queue
   4. Dit selects which process has to remove from memory by swapping
4. 4"No preemption" condition for a deadlock is defined as:

   1. AOnly one process may use a resource at a time
   2. BNo resource can be forcibly removed from process holding it
   3. CProcess holds a resource while awaiting for other resource
   4. DEach process holds resource needed by next process in chain
5. 5Processor:

   1. Ais the device where information stored
   2. Bis a sequence of the instructions
   3. Cis a device that performs a sequence of operations specified by instructions in memory
   4. Dis typically characterized by interactive processing and time-slicing of the CPU’s time to allow quick response to each user
6. 6Fixed-length block of main memory is called _____

   1. Aframes
   2. Bsegments
   3. Cnone of the above
   4. Dpages
7. 7The initial value of the semaphore that allows only one of the many processes to enter their critical section, is?

   1. A1
   2. B0
   3. C2
   4. D10
8. 8Mutual exclusion means that:

   1. Aif a process is executing in its critical section, then other processes must be executing in their critical section
   2. Bif a process is executing in its critical section, then all the resources of the system must be blocked until it finishes exclusion
   3. Cif a process is executing in its critical section, then no other process must be executing in their critical sections
   4. Dnone of the above
9. 9For every process there is a _____.

   1. Apointer to page table
   2. Bcopy of page table
   3. Cframe table
   4. Dpage table
10. 10In operating system, each process has its own

    1. Aall of the mentioned
    2. Baddress space and global variables
    3. Cset of data
    4. Dprogram code

11. 11Listing the sequence of instructions that are executed is called:

    1. Atrace
    2. Bprogram counter
    3. Cinstruction
    4. Dcontrol block
12. 12The segment of code in which the process may change common variables, update tables, write into files known as:

    1. Acritical section
    2. Bprogram
    3. Cnon-critical section
    4. Dmutual exclusion
13. 13Deadlock inevitable region can be referred as:

    1. Afun region
    2. Bfatal region
    3. Cfinal region
    4. Dfalse region
14. 14How to solve a problem of equal-size partitions?

    1. Aunequal-size partitions
    2. Bsegmentation
    3. Ccompaction
    4. Dvirtual memory segmentation
15. 15Paging?

    1. Aallows multiple programs to reside in separate areas of core at the time
    2. Bis a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided equal portions or blocks
    3. Cis a method of allocating processor time
    4. Dconsists of those addresses that may be generated by a processor during execution of a computation
16. 16In internal fragmentation, memory is internal to a partition and:

    1. Ais not being used
    2. Bnone of the above
    3. Cis always used
    4. Dis being used
17. 17A set of processes is deadlock if:

    1. Aeach process is blocked and will remain so forever
    2. Bnone of the above
    3. Call processes are trying to kill each other
    4. Deach process is terminated
18. 18A memory used to provide a high speed is called?

    1. Acache
    2. Bmain memory
    3. Cdisk buffer
    4. Dstack pointer
19. 19In indirect communication between processes P and Q:

    1. Athere is a mailbox to help communication between P and Q
    2. Bnone of the above
    3. Cthere is another machine between the two processes to help communication
    4. Dthere is another process R to handle and pass on the messages between P and Q
20. 20Semaphore is a/an _____ to solve the critical section problem?

    1. Aspecial program for a system
    2. Bcomplex structure
    3. Cinteger variable
    4. Dhardware for a system
21. 21Which of the following is not the state of a process?

    1. Anew
    2. Brunning
    3. Cold
    4. Dready
22. 22The address of the next instruction to be executed by the current process is provided by the:

    1. Apipe
    2. Bprogram counter
    3. CCPU registers
    4. Dprocess stack
23. 23Which of the following is not true about the memory management?

    1. Asegmentation suffers from external fragmentation
    2. Bpaging suffers from internal fragmentation
    3. Cvirtual memory is used only in multi-user systems
    4. Dsegmented memory can be paged
24. 24The primary distinction between the short-term scheduler and long-term scheduler is:

    1. Athe length of their queues
    2. Bnone of the above
    3. Cthe type of processes the schedule
    4. Dthe frequency of their execution
25. 25An un-interruptible unit is known as:

    1. Asingle
    2. Bnone of the above
    3. Cstatic
    4. Datomic

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2 Digital Technologies Quiz on OS Part 1 4, created by Bekinston Talgio on 03/07/2019.

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Bekinston Talgio

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