7347705
Descripción
Test por Hello World, actualizado hace más de 1 año
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Creado por Hello World
hace casi 8 años
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Pregunta 1
Pregunta
1. TCP/IP stands for
Respuesta
-
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)
Pregunta 2
Pregunta
2. When was TCP/IP developed?
Respuesta
-
o 1978
-
o 1977
-
o 1976
-
o 1975
Pregunta 3
Pregunta
3. With whom TCP/IP was driven
Respuesta
-
o Kahn and Cerf
-
o Ronald and Cerf
-
o Cerf and George
-
o McColin and Kahn
Pregunta 4
Pregunta
4. TCP is higher layer
Respuesta
- True
- False
Pregunta 5
Pregunta
5. What is the function of a subnet mask
Respuesta
-
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.
Pregunta 6
Pregunta
6. Which of the following is false about Subnet Mask?
Respuesta
-
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
Pregunta 7
Pregunta
7. Define a boolean algebra
Respuesta
-
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.
Pregunta 8
Pregunta
8. Define class A
Respuesta
-
o large organizations, governments
-
o medium sized organizations
-
o small organizations
-
o extra small organisations
Pregunta 9
Pregunta
9. Define class B
Respuesta
-
o large organizations, governments
-
o medium sized organizations
-
o small organizations
-
o extra small organisations
Pregunta 10
Pregunta
10. Define class C
Respuesta
-
o large organizations, governments
-
o medium sized organizations
-
o small organizations
-
o extra small organisation
Pregunta 11
Pregunta
11. In Class A an IP address starts with
Respuesta
-
o 0
-
o 10
-
o 110
-
o 1010
Pregunta 12
Pregunta
12. In Class C the network prefix is
Respuesta
-
o 24 bits long
-
o 16 bits long
-
o 8 bits long
-
o 32 bits long
Pregunta 13
Pregunta
13. Into how many classes divided the address space in classful addressing ?
Respuesta
-
5
-
4
-
3
-
2
Pregunta 14
Pregunta
14. How many layers have ISO/OSI Network Model
Respuesta
-
7
-
6
-
8
-
5
Pregunta 15
Pregunta
15. What is a link layer
Respuesta
-
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
Pregunta 16
Pregunta
16. What is a network layer
Respuesta
-
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
Pregunta 17
Pregunta
17. What is a transport layer
Respuesta
-
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
Pregunta 18
Pregunta
18. What is an application layer
Respuesta
-
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
Pregunta 19
Pregunta
19. In Class B an IP address starts with
Respuesta
-
o 0
-
o 10
-
o 110
-
o 1010
Pregunta 20
Pregunta
20. In Class C an IP address starts with
Respuesta
-
o 0
-
o 10
-
o 110
-
o 1010
Pregunta 21
Pregunta
21. In Class A the network prefix is
Respuesta
-
o 24 bits long
-
o 16 bits long
-
o 8 bits long
-
o 32 bits long
Pregunta 22
Pregunta
22. In Class B the network prefix is
Respuesta
-
o 24 bits long
-
o 16 bits long
-
o 8 bits long
-
o 32 bits long
Pregunta 23
Pregunta
23. PING stands for
Respuesta
-
o Packet Internet Groper
-
o Pocket Internet Groper
-
o Ping Internet Groper
-
o Packet Internet Gathering
Pregunta 24
Pregunta
24. ICMP stands for
Respuesta
-
o Internet Control Message Protocol
-
o Internet Control Machine Protocol
-
o Internet Clarify Message Protocol
-
o Internet Control Management Protocol
Pregunta 25
Pregunta
25. Define PING
Respuesta
-
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
Pregunta 26
Pregunta
26. Virtual memory provides
Respuesta
-
o Automatic storage allocation
-
o Protection
-
o Sharibility
-
o All the above
Pregunta 27
Pregunta
27. Where Virtual Machine was developed?
Respuesta
-
o Lancaster University
-
o Manchester University
-
o MIT
-
o Cambridge
Pregunta 28
Pregunta
28. What is the first commercial computer with virtual machine
Respuesta
-
o B5000
-
o B5550
-
o B5500
-
o C5000
Pregunta 29
Pregunta
29. When was the first commercial computer with virtual machine released?
Respuesta
-
o 1961
-
o 1962
-
o 1963
-
o 1964
Pregunta 30
Pregunta
30. Which of the following is false about VM and performance?
Respuesta
-
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
Pregunta 31
Pregunta
31. Which of the following is false about usability of Virtual Memory?
Respuesta
-
o Not enough memory
-
o Holes in the address space
-
o Keeping program secure
-
o Keeping program insecure
Pregunta 32
Pregunta
32. Define virtual address space
Respuesta
-
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
Pregunta 33
Pregunta
33. Define a page tables
Respuesta
-
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
Pregunta 34
Pregunta
34. Which of the following is incorrect about Subnet Mask
Respuesta
-
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.
Pregunta 35
Pregunta
35. What is a port number for SSH
Respuesta
-
o TCP 22
-
o TCP 33
-
o TCP 25
-
o TCP 443
Pregunta 36
Pregunta
36. POP stands for
Respuesta
-
o Post Office Protocol
-
o Postal Office Protocol
-
o Pop Office Protocol
-
o Prefix Office Protocol
Pregunta 37
Pregunta
37. Common port number for web pages
Respuesta
-
o 80
-
o 23
-
o 25
-
o 110
Pregunta 38
Pregunta
38. Common port number for telnet
Respuesta
-
o 80
-
o 23
-
o 25
-
o 110
Pregunta 39
Pregunta
39. Common port number for mail
Respuesta
-
o 80
-
o 23
-
o 25 and 110
-
o 111
Pregunta 40
Pregunta
40. How many classes have a subnet mask
Respuesta
-
1
-
2
-
3
-
4
Pregunta 41
Pregunta
41. At the FILE SYSTEM SECURITY what is an Access right?
Respuesta
-
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
Pregunta 42
Pregunta
42. At Linux Virtual File System Concept, The four primary object types in VFS are as follows:
Respuesta
-
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
Pregunta 43
Pregunta
43. What is an EMBEDDED SYSTEMS?
Respuesta
-
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
Pregunta 44
Pregunta
44. CHARACTERISTICS OF EMBEDDED OPERATING SYSTEMS, Give definition to Real-time operation:
Respuesta
-
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
Pregunta 45
Pregunta
45. Give the correct way to “Loading an eCos Configuration”:
Respuesta
-
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
Pregunta 46
Pregunta
46. Choose the correct choice of the “eCos Layered Structure” from bottom- to- top?
Respuesta
-
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.
Pregunta 47
Pregunta
47. How many implemented separate modules has The HAL?
Respuesta
-
3
-
4
-
5
-
6
Pregunta 48
Pregunta
48. How many main objectives has The eCos Kernel was designed to satisfy?
Respuesta
-
4
-
5
-
6
-
7
Pregunta 49
Pregunta
49. What does “TINYOS” mean?
Respuesta
-
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.
Pregunta 50
Pregunta
50. Three abstractions for resources are used in TinyOS:
Respuesta
-
o Dedicated, Virtualized, Shared
-
o Abstracted, Powered, Protected
-
o Determined, Called, Multiplexed
-
o Needed, Controlled, Used
Pregunta 51
Pregunta
51. What is a Computer Security?
Respuesta
-
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
Pregunta 52
Pregunta
52. This definition introduces three key objectives that are at the heart of computer security:
Respuesta
-
o Confidentiality, Integrity, Availability
-
o Protection, Updating, Creating
-
o Attacking, Copying, Pasting
-
o Dividing, Working, Researching
Pregunta 53
Pregunta
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:
Respuesta
-
o Authenticity, Accountability
-
o Loggin, Entering
-
o Accessibility, Availability
-
o Realibility, Security
Pregunta 54
Pregunta
54. Network security attacks can be classified as:
Respuesta
-
o Passive and active attacks
-
o Dangerous and undangerous
-
o Correct and incorrect
-
o Direct and indirect.
Pregunta 55
Pregunta
55. In an important early study of intrusion, Anderson[ANDE80] identified three classes of intruders:
Respuesta
-
o Masquerader, misfeasor, clandestine user
-
o Individual, legitimate, authorized
-
o Control, exploit, system
-
o Outside, inside, offside.
Pregunta 56
Pregunta
56. How many parts of Memory Hierarchy?
Respuesta
-
5
-
4
-
3
-
2
Pregunta 57
Pregunta
57. In Memory Hierarchy, at the Outboard storage which of the following are included:
Respuesta
-
o Cache
-
o Main memory
-
o Magnetic tape
-
o Magnetic disk
Pregunta 58
Pregunta
58. In Memory Hierarchy, at the Off-line storage which of the following are included:
Respuesta
-
o Cache
-
o Magnetic disk
-
o Magnetic tape
-
o Main memory
Pregunta 59
Pregunta
59. In Memory Hierarchy, at the Inboard memory which of the following are included:
Respuesta
-
o Main memory
-
o Magnetic disk
-
o Magnetic tape
-
o Optical disk
Pregunta 60
Pregunta
60. Cache Design has these properties?
Respuesta
-
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
Pregunta 61
Pregunta
61. Three techniques are possible for I/O operations:
Respuesta
-
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
Pregunta 62
Pregunta
62. How many principles has Deadlock?:
Respuesta
-
o 3
-
o 5
-
o 2
-
o 6
Pregunta 63
Pregunta
63. Which of the following principles has Deadlock?
Respuesta
-
o Prevention, Avoidance, Detection
-
o Execution, Association, Starvation
-
o Exclusion, Avoidance, Starvation
-
o Starvation, Detection, Exclusion
Pregunta 64
Pregunta
64. Much of the work in security and protection as it relates to operating systems can be roughly grouped into four categories?
Respuesta
-
o Availability, confidentiality, data integrity, authenticity
-
o Safety, accountability, reliability, density
-
o Usability, integrity, confidentiality, reliability
-
o Flexibility, availability, accountability, authenticity
Pregunta 65
Pregunta
65. The central themes of operating system design are all concerned with the management of processes and threads?
Respuesta
-
o Multiprogramming, multiprocessing, distributed processing
-
o Multitasking, multiprogramming, multithreading
-
o Multiprocessing, uniprocessing, multitasking
-
o Multithreading, distributed processing, uniprocessing
Pregunta 66
Pregunta
66. Which one of the following linux file system does not support journaling feture?
Respuesta
-
o ext2
-
o ext3
-
o ext4
-
o none of the mentioned
Pregunta 67
Pregunta
67. With the installation of Linux, a super user account is created called as _____
Respuesta
-
o Superuser
-
o User
-
o Administrator
-
o Root
Pregunta 68
Pregunta
68. Which command would you use if you want to remove the password assigned to a group?
Respuesta
-
o gpasswd – r
-
o gpasswd – d
-
o userdel
-
o delgroup
Pregunta 69
Pregunta
69. What command is used to remove files?
Respuesta
-
o Dm
-
o Rm
-
o Del
-
o Erase
-
o Wc
Pregunta 70
Pregunta
70. What command is used to remove the directory?
Respuesta
-
o Remove
-
o Rdir
-
o Mdir
-
o Delete
-
o Rmdir
Pregunta 71
Pregunta
71. Convert this number systems: BIN(1111000111) to DEC?
Respuesta
-
o 967
-
o 912
-
o 868
-
o 898
Pregunta 72
Pregunta
72. Convert this number systems: BIN(10101010101) to DEC?:
Respuesta
-
o 1365
-
o 1432
-
o 1295
-
o 1523
Pregunta 73
Pregunta
73. Convert this number systems: BIN(1100001100) to DEC?:
Respuesta
-
o 780
-
o 795
-
o 824
-
o 912
Pregunta 74
Pregunta
74. Convert this number systems: BIN(1111000111) to DEC?
Respuesta
-
o 967
-
o 912
-
o 868
-
o 898
Pregunta 75
Pregunta
75. Which of the following is not one of the principles of dealing with deadlock?
Respuesta
-
o Initialization
-
o Prevention
-
o Avoidance
-
o Detection
Pregunta 76
Pregunta
76. Current allocation of resources to processes where there is at least one sequence that does not result in deadlock is called:
Respuesta
-
o Safe state
-
o Unsafe state
-
o Ambiguous state
-
o Alternative state
Pregunta 77
Pregunta
77. Current allocation of resources to processes where there is no sequence that does not result in deadlock is called:
Respuesta
-
o Unsafe state
-
o Safe state
-
o Ambiguous state
-
o Alternative state
Pregunta 78
Pregunta
78. Can you solve the Dining Philosophers’ Problem using monitors?
Respuesta
-
o Yes
-
o No
-
o Yes, but only if there are less than five philosophers
-
o No, unless there are more than five philosophers
Pregunta 79
Pregunta
79. A fixed-length block of main memory is called:
Respuesta
-
o Frame
-
o Page
-
o Segment
-
o Section
Pregunta 80
Pregunta
80. A fixed-length block of data in secondary memory is called:
Respuesta
-
o Frame
-
o Page
-
o Segment
-
o Section
Pregunta 81
Pregunta
81. A variable-length block of data that resides in secondary memory is called:
Respuesta
-
o Frame
-
o Page
-
o Segment
-
o Section
Pregunta 82
Pregunta
82. When free memory is split into many unconnected pieces we call it:
Respuesta
-
o Internal fragmentation
-
o External fragmentation
-
o Compaction
-
o Memory distribution
Pregunta 83
Pregunta
83. Memory partitioning algorithm that uses binary tree as a data structure is called:
Respuesta
-
o First-fit algorithm
-
o Next-fit algorithm
-
o Buddy system
-
o Best-fit algorithm
Pregunta 84
Pregunta
84. A state in which the system spends most of its time swapping pieces rather than executing instructions is called:
Respuesta
-
o Virtual memory
-
o Thrashing
-
o Swapping
-
o Spanning
Pregunta 85
Pregunta
85. What command do you use to create Linux file systems?
Respuesta
-
o Fdisk
-
o Mkfs
-
o Fsck
-
o Mount
Pregunta 86
Pregunta
86. What command is not used to list the files chap01, chap02 and chap04?
Respuesta
-
o ls chap*
-
o ls chap[124]
-
o ls - x chap0[124]
-
o ls chap0[124]
Pregunta 87
Pregunta
87. What is operating system?
Respuesta
-
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
Pregunta 88
Pregunta
88. The main function of the command interpreter is
Respuesta
-
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
Pregunta 89
Pregunta
89. To create a file
Respuesta
-
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
Pregunta 90
Pregunta
90. What is a Server?
Respuesta
-
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
Pregunta 91
Pregunta
91. Show incorrect choice, when we mean types of Server:
Respuesta
-
o Cooking server
-
o Database server
-
o Client server
-
o Application server
Pregunta 92
Pregunta
92. What is a Create file?
Respuesta
-
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.
Pregunta 93
Pregunta
93. What is a Delete file?
Respuesta
-
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.
Pregunta 94
Pregunta
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?
Respuesta
-
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
Pregunta 95
Pregunta
95. You need to subnet a network that has 5 subnets, each with at least 16 hosts. Which classful subnet mask would you use?
Respuesta
-
o 255.255.255.192
-
o 255.255.255.224
-
o 255.255.255.240
-
o 255.255.255.248
Pregunta 96
Pregunta
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?
Respuesta
-
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
Pregunta 97
Pregunta
97. File type can be represented by
Respuesta
-
o file name
-
o file extension
-
o file identifier
-
o none of the mentioned
Pregunta 98
Pregunta
98. What does GNU stand for?
Respuesta
-
o GNU's not Unix
-
o Greek Needed Unix
-
o General Unix
-
o General Noble Unix
-
o None of the above
Pregunta 99
Pregunta
99. Which of the following is not a principle of storage management responsibilities?
Respuesta
-
o Process isolation
-
o Process termination
-
o Automatic allocation and management
-
o Protection and access control
Pregunta 100
Pregunta
100. Virtual memory takes advantage of
Respuesta
-
o Fast CPU
-
o Large secondary memory
-
o Modular programming
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o Scheduling
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