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OS Final

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IITU
Hello World
Quiz by Hello World, updated more than 1 year ago
Hello World
Created by Hello World almost 8 years ago
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Resource summary

Question 1

Question
1. TCP/IP stands for
Answer
  • o TCP/IP (Transmission Control Protocol/Internet Protocol)
  • o TCP/IP (Transfer Control Protocol/Internet Protocol
  • o TCP/IP (Transmission Control Protocol/Individual Protocol)
  • o TCP/IP (Transcript Control Protocol/Internet Protocol)

Question 2

Question
2. When was TCP/IP developed?
Answer
  • o 1978
  • o 1977
  • o 1976
  • o 1975

Question 3

Question
3. With whom TCP/IP was driven
Answer
  • o Kahn and Cerf
  • o Ronald and Cerf
  • o Cerf and George
  • o McColin and Kahn

Question 4

Question
4. TCP is higher layer
Answer
  • True
  • False

Question 5

Question
5. What is the function of a subnet mask
Answer
  • o to determine whether an IP address exists on the local network or whether it must be routed outside the local network.
  • o process that applies binary logic to yield binary results
  • o It sends out ICMP (Internet Control Message Protocol) messages to verify both the logical addresses & the Physical connection.
  • o to determine whether an IP address exists on the global network or whether it must be routed outside the global network.

Question 6

Question
6. Which of the following is false about Subnet Mask?
Answer
  • o The function of a subnet mask is to determine whether an IP address exists on the local network or whether it must be routed outside the local network.
  • o It is applied to a message’s destination address to extract the network address.
  • o If the extracted network address matches the local network ID, the destination is located on the local network.
  • o It sends out ICMP (Internet Control Message Protocol) messages to verify both the logical addresses & the Physical connection

Question 7

Question
7. Define a boolean algebra
Answer
  • o process that applies binary logic to yield binary results
  • o to determine whether an IP address exists on the local network or whether it must be routed outside the local network.
  • o It sends out ICMP (Internet Control Message Protocol) messages to verify both the logical addresses & the Physical connection.
  • o to determine whether an IP address exists on the global network or whether it must be routed outside the global network.

Question 8

Question
8. Define class A
Answer
  • o large organizations, governments
  • o medium sized organizations
  • o small organizations
  • o extra small organisations

Question 9

Question
9. Define class B
Answer
  • o large organizations, governments
  • o medium sized organizations
  • o small organizations
  • o extra small organisations

Question 10

Question
10. Define class C
Answer
  • o large organizations, governments
  • o medium sized organizations
  • o small organizations
  • o extra small organisation

Question 11

Question
11. In Class A an IP address starts with
Answer
  • o 0
  • o 10
  • o 110
  • o 1010

Question 12

Question
12. In Class C the network prefix is
Answer
  • o 24 bits long
  • o 16 bits long
  • o 8 bits long
  • o 32 bits long

Question 13

Question
13. Into how many classes divided the address space in classful addressing ?
Answer
  • 5
  • 4
  • 3
  • 2

Question 14

Question
14. How many layers have ISO/OSI Network Model
Answer
  • 7
  • 6
  • 8
  • 5

Question 15

Question
15. What is a link layer
Answer
  • o Includes device driver and network interface card
  • o Handles the movement of packets
  • o Provides a reliable flow of data between two hosts
  • o Handles the details of the particular application

Question 16

Question
16. What is a network layer
Answer
  • o Includes device driver and network interface card
  • o Handles the movement of packets
  • o Provides a reliable flow of data between two hosts
  • o Handles the details of the particular application

Question 17

Question
17. What is a transport layer
Answer
  • o Includes device driver and network interface card
  • o Handles the movement of packets
  • o Provides a reliable flow of data between two hosts
  • o Handles the details of the particular application

Question 18

Question
18. What is an application layer
Answer
  • o Includes device driver and network interface card
  • o Handles the movement of packets
  • o Provides a reliable flow of data between two hosts
  • o Handles the details of the particular application

Question 19

Question
19. In Class B an IP address starts with
Answer
  • o 0
  • o 10
  • o 110
  • o 1010

Question 20

Question
20. In Class C an IP address starts with
Answer
  • o 0
  • o 10
  • o 110
  • o 1010

Question 21

Question
21. In Class A the network prefix is
Answer
  • o 24 bits long
  • o 16 bits long
  • o 8 bits long
  • o 32 bits long

Question 22

Question
22. In Class B the network prefix is
Answer
  • o 24 bits long
  • o 16 bits long
  • o 8 bits long
  • o 32 bits long

Question 23

Question
23. PING stands for
Answer
  • o Packet Internet Groper
  • o Pocket Internet Groper
  • o Ping Internet Groper
  • o Packet Internet Gathering

Question 24

Question
24. ICMP stands for
Answer
  • o Internet Control Message Protocol
  • o Internet Control Machine Protocol
  • o Internet Clarify Message Protocol
  • o Internet Control Management Protocol

Question 25

Question
25. Define PING
Answer
  • o command verifies OSI Layer 3
  • o verifies both the logical addresses & the Physical connection
  • o process that applies binary logic to yield binary results
  • o verifies the Physical connection

Question 26

Question
26. Virtual memory provides
Answer
  • o Automatic storage allocation
  • o Protection
  • o Sharibility
  • o All the above

Question 27

Question
27. Where Virtual Machine was developed?
Answer
  • o Lancaster University
  • o Manchester University
  • o MIT
  • o Cambridge

Question 28

Question
28. What is the first commercial computer with virtual machine
Answer
  • o B5000
  • o B5550
  • o B5500
  • o C5000

Question 29

Question
29. When was the first commercial computer with virtual machine released?
Answer
  • o 1961
  • o 1962
  • o 1963
  • o 1964

Question 30

Question
30. Which of the following is false about VM and performance?
Answer
  • o Better performance: we can use more memory than we have
  • o Nothing; mapping to memory or disk is just as easy
  • o Worse performance: reading from disk is slower than RAM
  • o Good performance: reading from disk is slower than RAM

Question 31

Question
31. Which of the following is false about usability of Virtual Memory?
Answer
  • o Not enough memory
  • o Holes in the address space
  • o Keeping program secure
  • o Keeping program insecure

Question 32

Question
32. Define virtual address space
Answer
  • o process refers to the logical (or virtual) view of how a process is stored in memory
  • o used to translate the virtual addresses seen by the application into physical addresses
  • o a segment of virtual memory that has been assigned a direct byte-for-byte correlation with some portion of a file or file-like resource.
  • o none of the mentioned

Question 33

Question
33. Define a page tables
Answer
  • o process refers to the logical (or virtual) view of how a process is stored in memory
  • o used to translate the virtual addresses seen by the application into physical addresses
  • o a segment of virtual memory that has been assigned a direct byte-for-byte correlation with some portion of a file or file-like resource.
  • o none of the mentioned

Question 34

Question
34. Which of the following is incorrect about Subnet Mask
Answer
  • o The function of a subnet mask is to determine whether an IP address exists on the local network or whether it must be routed outside the local network.
  • o It is applied to a message’s destination address to extract the network address.
  • o to determine whether an IP address exists on the global network or whether it must be routed outside the global network.
  • o If the extracted network address matches the local network ID, the destination is located on the local network.

Question 35

Question
35. What is a port number for SSH
Answer
  • o TCP 22
  • o TCP 33
  • o TCP 25
  • o TCP 443

Question 36

Question
36. POP stands for
Answer
  • o Post Office Protocol
  • o Postal Office Protocol
  • o Pop Office Protocol
  • o Prefix Office Protocol

Question 37

Question
37. Common port number for web pages
Answer
  • o 80
  • o 23
  • o 25
  • o 110

Question 38

Question
38. Common port number for telnet
Answer
  • o 80
  • o 23
  • o 25
  • o 110

Question 39

Question
39. Common port number for mail
Answer
  • o 80
  • o 23
  • o 25 and 110
  • o 111

Question 40

Question
40. How many classes have a subnet mask
Answer
  • 1
  • 2
  • 3
  • 4

Question 41

Question
41. At the FILE SYSTEM SECURITY what is an Access right?
Answer
  • o The way in which an object is accessed by a subject
  • o Anything to which access is controlled
  • o An entity capable of accessing objects
  • o None of them

Question 42

Question
42. At Linux Virtual File System Concept, The four primary object types in VFS are as follows:
Answer
  • o Superblock object, inode object, dentry object, file object
  • o System object, software object, hardware object, network object
  • o Virtual object, physical object, i/o object, calling object
  • o File system object, user object, disk object, mapping object

Question 43

Question
43. What is an EMBEDDED SYSTEMS?
Answer
  • o combination of computer hardware and software, and perhaps additional mechanical or other part, designed to perform a dedicated function
  • o A file consists of a collection of records
  • o The cache manager calls the log file system to prompt it to flush the log file to disk.
  • o Once the log file updates are safely on disk, the cache manager flushes the volume changes to disk

Question 44

Question
44. CHARACTERISTICS OF EMBEDDED OPERATING SYSTEMS, Give definition to Real-time operation:
Answer
  • o In many embedded systems, the correctness of a computation depends, in part, on the time at which it is delivered
  • o Embedded software may execute in response to external events
  • o Condtional compilation can be used
  • o There is virtually no device that needs to be supported by all versions of the OS, and the range of I/O devices is large

Question 45

Question
45. Give the correct way to “Loading an eCos Configuration”:
Answer
  • o GNU make utility>>Application source code>>GNU cross compiler>>GNU linker>>Executable file
  • o Application source code>>GNU linker>>GNU cross compiler>>GNU make utility>>Executable file
  • o GNU linker>>Application source code>>GNU make utility>>GNU cross compiler>>Executable file
  • o GNU cross compiler>>GNU linker>>GNU make utility>>Application source code>>Executable file

Question 46

Question
46. Choose the correct choice of the “eCos Layered Structure” from bottom- to- top?
Answer
  • o Hardware abstraction layer, Kernel, I/O system, Standard C library, User application code
  • o Kernel, I/O system, Standard C library, User application code, Hardware abstraction layer
  • o User application code, Standard C library, I/O system, Kernel, Hardware abstraction layer
  • o I/O system, Kernel, Hardware abstraction layer, Standard C library, User application code.

Question 47

Question
47. How many implemented separate modules has The HAL?
Answer
  • 3
  • 4
  • 5
  • 6

Question 48

Question
48. How many main objectives has The eCos Kernel was designed to satisfy?
Answer
  • 4
  • 5
  • 6
  • 7

Question 49

Question
49. What does “TINYOS” mean?
Answer
  • o Represents a significant departure from other embedded operating systems
  • o is a flag that a thread can check before executing a particular piece of code.
  • o A different distributes of Linux.
  • o A different versions of Windows.

Question 50

Question
50. Three abstractions for resources are used in TinyOS:
Answer
  • o Dedicated, Virtualized, Shared
  • o Abstracted, Powered, Protected
  • o Determined, Called, Multiplexed
  • o Needed, Controlled, Used

Question 51

Question
51. What is a Computer Security?
Answer
  • o The protection afforded to an automated information system in order to attain the applicable objectives of preserving the integrity, availability and confidentiality of information resources
  • o Comparing the information systems with computer systems
  • o Updating hardware and software
  • o Creating the local and global networks for computer systems

Question 52

Question
52. This definition introduces three key objectives that are at the heart of computer security:
Answer
  • o Confidentiality, Integrity, Availability
  • o Protection, Updating, Creating
  • o Attacking, Copying, Pasting
  • o Dividing, Working, Researching

Question 53

Question
53. Although the use of the CIA triad to define security objects is well established, some in the security field feel that additional concepts are needed to present a complete picture. Two of the most commonly mentioned are as follows:
Answer
  • o Authenticity, Accountability
  • o Loggin, Entering
  • o Accessibility, Availability
  • o Realibility, Security

Question 54

Question
54. Network security attacks can be classified as:
Answer
  • o Passive and active attacks
  • o Dangerous and undangerous
  • o Correct and incorrect
  • o Direct and indirect.

Question 55

Question
55. In an important early study of intrusion, Anderson[ANDE80] identified three classes of intruders:
Answer
  • o Masquerader, misfeasor, clandestine user
  • o Individual, legitimate, authorized
  • o Control, exploit, system
  • o Outside, inside, offside.

Question 56

Question
56. How many parts of Memory Hierarchy?
Answer
  • 5
  • 4
  • 3
  • 2

Question 57

Question
57. In Memory Hierarchy, at the Outboard storage which of the following are included:
Answer
  • o Cache
  • o Main memory
  • o Magnetic tape
  • o Magnetic disk

Question 58

Question
58. In Memory Hierarchy, at the Off-line storage which of the following are included:
Answer
  • o Cache
  • o Magnetic disk
  • o Magnetic tape
  • o Main memory

Question 59

Question
59. In Memory Hierarchy, at the Inboard memory which of the following are included:
Answer
  • o Main memory
  • o Magnetic disk
  • o Magnetic tape
  • o Optical disk

Question 60

Question
60. Cache Design has these properties?
Answer
  • o Size, block size, mapping function, replacement algorithm, write policy
  • o Size, search function, write function, read policy, vector algorithm
  • o Size, mapping algorithm, vector function, write policy, replacement function
  • o Size, blocking algorithm, search function, replacement vector, read policy

Question 61

Question
61. Three techniques are possible for I/O operations:
Answer
  • o Programmed I/O, Interrupt-driven I/O, Direct memory access(DMA)
  • o Object-oriented I/O, Design I/O, Usable I/O
  • o Machine I/O, Architecture I/O, Hardware I/O
  • o Control I/O, Status I/O, Transfer I/O

Question 62

Question
62. How many principles has Deadlock?:
Answer
  • o 3
  • o 5
  • o 2
  • o 6

Question 63

Question
63. Which of the following principles has Deadlock?
Answer
  • o Prevention, Avoidance, Detection
  • o Execution, Association, Starvation
  • o Exclusion, Avoidance, Starvation
  • o Starvation, Detection, Exclusion

Question 64

Question
64. Much of the work in security and protection as it relates to operating systems can be roughly grouped into four categories?
Answer
  • o Availability, confidentiality, data integrity, authenticity
  • o Safety, accountability, reliability, density
  • o Usability, integrity, confidentiality, reliability
  • o Flexibility, availability, accountability, authenticity

Question 65

Question
65. The central themes of operating system design are all concerned with the management of processes and threads?
Answer
  • o Multiprogramming, multiprocessing, distributed processing
  • o Multitasking, multiprogramming, multithreading
  • o Multiprocessing, uniprocessing, multitasking
  • o Multithreading, distributed processing, uniprocessing

Question 66

Question
66. Which one of the following linux file system does not support journaling feture?
Answer
  • o ext2
  • o ext3
  • o ext4
  • o none of the mentioned

Question 67

Question
67. With the installation of Linux, a super user account is created called as _____
Answer
  • o Superuser
  • o User
  • o Administrator
  • o Root

Question 68

Question
68. Which command would you use if you want to remove the password assigned to a group?
Answer
  • o gpasswd – r
  • o gpasswd – d
  • o userdel
  • o delgroup

Question 69

Question
69. What command is used to remove files?
Answer
  • o Dm
  • o Rm
  • o Del
  • o Erase
  • o Wc

Question 70

Question
70. What command is used to remove the directory?
Answer
  • o Remove
  • o Rdir
  • o Mdir
  • o Delete
  • o Rmdir

Question 71

Question
71. Convert this number systems: BIN(1111000111) to DEC?
Answer
  • o 967
  • o 912
  • o 868
  • o 898

Question 72

Question
72. Convert this number systems: BIN(10101010101) to DEC?:
Answer
  • o 1365
  • o 1432
  • o 1295
  • o 1523

Question 73

Question
73. Convert this number systems: BIN(1100001100) to DEC?:
Answer
  • o 780
  • o 795
  • o 824
  • o 912

Question 74

Question
74. Convert this number systems: BIN(1111000111) to DEC?
Answer
  • o 967
  • o 912
  • o 868
  • o 898

Question 75

Question
75. Which of the following is not one of the principles of dealing with deadlock?
Answer
  • o Initialization
  • o Prevention
  • o Avoidance
  • o Detection

Question 76

Question
76. Current allocation of resources to processes where there is at least one sequence that does not result in deadlock is called:
Answer
  • o Safe state
  • o Unsafe state
  • o Ambiguous state
  • o Alternative state

Question 77

Question
77. Current allocation of resources to processes where there is no sequence that does not result in deadlock is called:
Answer
  • o Unsafe state
  • o Safe state
  • o Ambiguous state
  • o Alternative state

Question 78

Question
78. Can you solve the Dining Philosophers’ Problem using monitors?
Answer
  • o Yes
  • o No
  • o Yes, but only if there are less than five philosophers
  • o No, unless there are more than five philosophers

Question 79

Question
79. A fixed-length block of main memory is called:
Answer
  • o Frame
  • o Page
  • o Segment
  • o Section

Question 80

Question
80. A fixed-length block of data in secondary memory is called:
Answer
  • o Frame
  • o Page
  • o Segment
  • o Section

Question 81

Question
81. A variable-length block of data that resides in secondary memory is called:
Answer
  • o Frame
  • o Page
  • o Segment
  • o Section

Question 82

Question
82. When free memory is split into many unconnected pieces we call it:
Answer
  • o Internal fragmentation
  • o External fragmentation
  • o Compaction
  • o Memory distribution

Question 83

Question
83. Memory partitioning algorithm that uses binary tree as a data structure is called:
Answer
  • o First-fit algorithm
  • o Next-fit algorithm
  • o Buddy system
  • o Best-fit algorithm

Question 84

Question
84. A state in which the system spends most of its time swapping pieces rather than executing instructions is called:
Answer
  • o Virtual memory
  • o Thrashing
  • o Swapping
  • o Spanning

Question 85

Question
85. What command do you use to create Linux file systems?
Answer
  • o Fdisk
  • o Mkfs
  • o Fsck
  • o Mount

Question 86

Question
86. What command is not used to list the files chap01, chap02 and chap04?
Answer
  • o ls chap*
  • o ls chap[124]
  • o ls - x chap0[124]
  • o ls chap0[124]

Question 87

Question
87. What is operating system?
Answer
  • o collection of programs that manages hardware resources
  • o system service provider to the application programs
  • o link to interface the hardware and application programs
  • o all of the mentioned

Question 88

Question
88. The main function of the command interpreter is
Answer
  • o to get and execute the next user-specified command
  • o to provide the interface between the API and application program
  • o to handle the files in operating system
  • o none of the mentioned

Question 89

Question
89. To create a file
Answer
  • o allocate the space in file system
  • o make an entry for new file in directory
  • o both (a) and (b)
  • o none of the mentioned

Question 90

Question
90. What is a Server?
Answer
  • o is a computer program running to serve the requests of other programs, the "clients".
  • o Simple computer
  • o Optical device
  • o Types of laptops

Question 91

Question
91. Show incorrect choice, when we mean types of Server:
Answer
  • o Cooking server
  • o Database server
  • o Client server
  • o Application server

Question 92

Question
92. What is a Create file?
Answer
  • o When a new file is created, an entry must be added to the directory
  • o When a user or application references a file, the directory must be searched to find the entry corresponding to that file..
  • o When a file is deleted, an entry must be removed from the directory.
  • o All or a portion of the directory may be requested.

Question 93

Question
93. What is a Delete file?
Answer
  • o When a file is deleted, an entry must be removed from the directory
  • o When a user or application references a file, the directory must be searched to find the entry corresponding to that file..
  • o When a new file is created, an entry must be added to the directory.
  • o All or a portion of the directory may be requested.

Question 94

Question
94. Given the IP address 172.16.12.54 with a mask of 255.255.255.240, which of the following are valid host addresses on the different subnet?
Answer
  • o 172.16.12.64
  • o 172.16.12.57
  • o 172.16.12.49
  • o 172.16.12.48
  • o 172.16.12.63
  • o 172.16.12.45

Question 95

Question
95. You need to subnet a network that has 5 subnets, each with at least 16 hosts. Which classful subnet mask would you use?
Answer
  • o 255.255.255.192
  • o 255.255.255.224
  • o 255.255.255.240
  • o 255.255.255.248

Question 96

Question
96. Given the IP address 172.16.12.54 with a mask of 255.255.255.240, which of the following are valid broadcast addresses?
Answer
  • o 172.16.12.64
  • o 172.16.12.57
  • o 172.16.12.49
  • o 172.16.12.48
  • o 172.16.12.63
  • o 172.16.12.45

Question 97

Question
97. File type can be represented by
Answer
  • o file name
  • o file extension
  • o file identifier
  • o none of the mentioned

Question 98

Question
98. What does GNU stand for?
Answer
  • o GNU's not Unix
  • o Greek Needed Unix
  • o General Unix
  • o General Noble Unix
  • o None of the above

Question 99

Question
99. Which of the following is not a principle of storage management responsibilities?
Answer
  • o Process isolation
  • o Process termination
  • o Automatic allocation and management
  • o Protection and access control

Question 100

Question
100. Virtual memory takes advantage of
Answer
  • o Fast CPU
  • o Large secondary memory
  • o Modular programming
  • o Scheduling
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