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
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
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 ?
Question 14
Question
14. How many layers have ISO/OSI Network Model
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
Question 20
Question
20. In Class C an IP address starts with
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
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
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
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?
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
Question 38
Question
38. Common port number for telnet
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
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?
Question 48
Question
48. How many main objectives has The eCos Kernel was designed to satisfy?
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:
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?
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?:
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?
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?:
Question 74
Question
74. Convert this number systems: BIN(1111000111) to DEC?
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
Question 90
Question
90. What is a Server?
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?
Question 100
Question
100. Virtual memory takes advantage of
Answer
-
o Fast CPU
-
o Large secondary memory
-
o Modular programming
-
o Scheduling