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51.

What steps does the shell take after processing a command.

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52.

What are the uses of pipes in UNIX?

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53.

What are the different ways of redirecting I/O?

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54.

What is the alias mechanism in UNIX?

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55.

What do you understand by File modes in Unix?

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56.

There are multiple shell types of Unix. What are the features of the Bourne and Korn shell?

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57.

What are sockets?

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58.

Explain IPC.

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59.

What is cascading termination?

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60.

What is context switching ?

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61.

Explain PCB.

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62.

When an input file is opened, what are the possible errors that may occur?

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63.

What are the activities related to the Time Shared User Program Management?

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64.

What is time slice?

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65.

Differentiate between the user mode and monitor mode.

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66.

What is EIDE?

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67.

Explain the positioning time for a disk.

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68.

Explain the execution cycle for a von Neumann architecture.

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69.

How can the speed of interrupt driven input output systems be improved?

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70.

What is the need of device status table?

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71.

Why is interrupt vector used in operating systems?

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72.

Explain the handheld systems. List the issues related to the handheld system.

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73.

What is DLM?

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74.

Explain SMP.

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75.

What are loosely coupled systems?

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76.

What is graceful degradation?

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77.

Why is a single serial port managed with a single interrupt-driven I/O but a front-end processor is managed using a polling I/O, such as a terminal concentrator?

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78.

What do you understand by transaction atomicity?

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79.

What are merits and demerits of systems supporting multiple file structure and systems supporting a stream of bytes?

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80.

What are the benefits and losses of placing the functionality in a device controller rather than in placing it in the kernel?

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81.

How are data structures handled by NTFS and how does it recover from a crash?

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82.

Explain the booting process of a Windows XP system.

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83.

Explain the layers of a Windows XP system.

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84.

What problems are faced during the implementation of a network-transparent system?

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85.

What are the pros and cons of using circuit switching?

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86.

How can a VFS layer allow multiple file systems support?

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87.

What complications does concurrent processing add to an operating system?

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88.

When does the Belady's anomaly occur?

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89.

State the advantages of segmented paging over pure segmentation?

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90.

Why is the context switch overhead of a user-level threading as compared to the overhead for processes? Explain.

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91.

For a deadlock to occur what are the necessary conditions

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92.

What differences are there between a semaphore wait signal and a condition variable wait signal?

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93.

How does reference counting manage memory allocated objects? When can it fail to reclaim objects?

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94.

Explain how a copying garbage collector works. How can it be implemented using semispaces?

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95.

Why is round robin algorithm considered better than first come first served algorithm?

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96.

What are the different types of scheduling algorithms?

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97.

What are the advantages of distributed system?

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98.

What is a library?

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99.

What is a compiler?

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100.

What are the disadvantages of using threads?

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