OS FULL 117

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1. What is not a main structural element of a computer system?

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2. Which of the following registers are used by the processor to exchange data with memory?

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3. Which of the following registers are used by the processor to exchange data with input/output module?

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4. Which of the following element of a computer system controls the operation of the computer and performs its data processing functions?

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5. Which of the following element of a computer system stores data and programs?

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6. Which of the following provides for communication among elements of a computer system?

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7. Which of the following element of a computer system moves data between the computer and its external environment?

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8. The processor contains a single data register, called

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9. This register specifies a particular input/output device

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10. This register is used for the exchange of data between an I/O module and the processor

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11. This register contains the data to be written into memory or which receives the data read from memory

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12. This register specifies the location in memory for the next read or write

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14. Which register contains the address of the next instruction to be fetched?

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14. Which register contains the instruction most recently fetched?

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15. Which register contains condition codes set by the processor hardware as the result of operations?

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16. The fetched instruction is loaded into the

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17. At the beginning of each instruction cycle, the processor fetches an instruction from the memory. The address of the instruction is held in

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18. The processor is executing ‘Load AC from memory’ instruction. Choose the correct micro-instructions:

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19. When an I/O device completes an I/O operation, the device issues an interrupt signal to the processor and then:

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20. When the time required for the I/O operation is less that the time to complete the execution of instructions between write operations in the user program, it is:

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21. When the time required for the I/O operation will take much more time than executing a sequence of user instructions, it is:

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22. If there no interrupts, after each write operation, the processor must:

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23. Complete the relationship concerning the memory systems: faster access time –

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24. Complete the relationship concerning the memory systems: greater capacity –

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25. Complete the relationship concerning the memory systems: greater capacity –

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26. The smaller, more expensive, faster memory is:

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27. If the accessed word is found in the faster memory, that is defined as a:

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28. If the accessed word is not found in the faster memory, that is defined as a:

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29. This type of memory is nonvolatile:

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30. When a processor attempts to read a byte or word of memory, it firstly checks the:

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31. This chooses which block to replace when a new block is to be loaded into the cache and the cache already had all slots filled with other blocks:

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32. If the contents of a block in the cache are altered, then it is needed to save it back to main memory before replacing it. This is called:

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33. Which of the following is not a technique possible for I/O operations?

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34. The processor issues an I/O command to a module and waits, periodically checking the status of the I/O module until it finds that the operation is complete.

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35. The I/O module performs the requested action and then sets the appropriate bits in the I/O status register but takes no further action to alert the processor.

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36. The main disadvantage of this technique: it is a time-consuming process that keeps the processor busy needlessly.

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37. The processor issues an I/O command to a module and then go on to some other useful work.

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38. The I/O module performs the requested action and alerts the processor to request service when it is ready to exchange data with the processor.

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39. The main disadvantage of this technique: consumes a lot of processor time, because every word of data that goes from memory to I/O module or from I/O module to memory must pass through the processor.

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40. The processor issues an I/O command to a separate module, by sending the type of operation (read/write), the address of the I/O device, the starting location in memory for data, number of words. Then the processor continues with other work.

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41. The module transfers the entire block of data to/from memory without going through the processor.

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42. The main disadvantage of this technique: there is a competition for bus usage.

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43. A hardcopy sign-up sheet was used to reserve computer time with

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44. A system clock generates interrupts at a rate of approximately one every 0.2 seconds. At each clock interrupt, the OS regained control and could assign the processor to another user. This technique is known as

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45. Batch operating systems were used (years)

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46. Job control language was used

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47. Serial processing was used

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48. The central idea in this system was the use of a piece of software known as the monitor

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49. The concept of a batch operating system was developed to

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50. The concept of modes of operation (user mode, system mode) was introduced with

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51. The principal objective of the time-sharing system is to

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52. The processor was often idle waiting for the I/O instruction to conclude. To overcome the problem the following approach was introduced: when one job needs to wait for I/O, the processor can switch to the other job. This was a

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53. The programmer interacted directly with the computer hardware with

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54. The serial processing presented two main problems:

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55. There were no OS with

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56. This system handles multiple interactive jobs

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57. This system was developed by General Motors for the use on an IBM 701

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58 This type of system was developed at MIT by a group known as Project MAC for the IBM 709 in 1961

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59. Lost signals, duplicate signals received'. This is

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60. 'Two or more programs hung up waiting for each other'. This is

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61. 'When programs share memory and their execution is interleaved by the processor, they may interfere with each other by overwriting common memory areas in unpredictable ways. The results of a particular program depend on the activities of other programs in a shared system'. This is

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. Choose the storage management responsibility for "Many application programs require means for storing information for extended periods of time, after the computer has been powered down"

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. Choose the storage management responsibility for "Programmers should be able to define program modules, and to create, destroy, and alter the size of modules dynamically"

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Choose the storage management responsibility for "The OS can achieve efficiency by assigning memory to jobs only as needed"

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. Choose the storage management responsibility for "The OS must allow portions of memory to be accessible in various ways by various users"

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Choose the storage management responsibility for "The OS must prevent independent processes from interfering with each other's memory, both data and instructions"

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In operating system security and protection, authenticity:

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In operating system security and protection, availability is:

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In operating system security and protection, confidentiality is:

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In operating system security and protection, data integrity is:

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Short-term scheduler, or dispatcher, picks a process. Each process in the queue is given some time in turn. This strategy is called:

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The base register

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. The limit register

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The process index register

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This term was first used by the designers of Multics in the 1960s

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'Ease of evolution of an OS' corresponds to the following objective:

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'The OS as a resource manager' corresponds to the following objective:

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'The OS as a User/Computer interface' corresponds to the following objective:

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. An application programs is developed by the

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The end user views a computer system in terms of

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The hardware and software used in providing applications to a user can be viewed in a:

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This contains the most frequently used functions in the OS:

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Utilities are

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Process is

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A task in a blocked state

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The systems which allows only one process execution at a time, are called

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The state of a process is defined by:

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Which of the following is not the state of a process?

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. Suppose that a process is in “Blocked” state waiting for some I/O service. When the service is completed, it goes to the:

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. Which of the following state transitions is not possible?

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If a process is executing in its critical section, then no other processes can be executing in their critical section. This condition is called

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. Interprocess communication:

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A sequence of instructions, in a computer language, to get the desired result, is known as?

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In operating system, each process has its own:

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For each process OS creates and manages:

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The available vector defines

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The resource vector define

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This matrix defines the current allocation to process i of the resource j

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This matrix defines the amount of resources of type j requested by process i

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This matrix defines requirements of processes i for the resources j

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The banker's algorithm is referred to as

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'Hold and wait' condition for deadlock is defined as

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'Circular wait' condition for deadlock is defined as

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'No preemption' condition for deadlock is defined as

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'Mutual exclusion' condition for deadlock is defined as

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What is NOT an example of consumable resource?

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What is NOT an example of reusable resource?

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This resource can be created and destroyed

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This resource can be safely used by only one process at a time and is not depleted by that use

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Deadlock inevitable region can be referred to as a

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This illustrates the progress of two processes competing for two resources

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When each process in the set is blocked awaiting for resource seized by another blocked process

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Which of the following statements is false:

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. Memory is:

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Processor is:

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Program is:

YUNIKOVA

OS FULL 117

1. What is not a main structural element of a computer system?

2. Which of the following registers are used by the processor to exchange data with memory?

3. Which of the following registers are used by the processor to exchange data with input/output module?

4. Which of the following element of a computer system controls the operation of the computer and performs its data processing functions?

5. Which of the following element of a computer system stores data and programs?

6. Which of the following provides for communication among elements of a computer system?

7. Which of the following element of a computer system moves data between the computer and its external environment?

8. The processor contains a single data register, called

9. This register specifies a particular input/output device

10. This register is used for the exchange of data between an I/O module and the processor

11. This register contains the data to be written into memory or which receives the data read from memory

12. This register specifies the location in memory for the next read or write

14. Which register contains the address of the next instruction to be fetched?

14. Which register contains the instruction most recently fetched?

15. Which register contains condition codes set by the processor hardware as the result of operations?

16. The fetched instruction is loaded into the

17. At the beginning of each instruction cycle, the processor fetches an instruction from the memory. The address of the instruction is held in

18. The processor is executing ‘Load AC from memory’ instruction. Choose the correct micro-instructions:

19. When an I/O device completes an I/O operation, the device issues an interrupt signal to the processor and then:

20. When the time required for the I/O operation is less that the time to complete the execution of instructions between write operations in the user program, it is: