CDAC Placement Papers

Company: CDAC


Select the Best Choice(s):

1. A set of rules, which enable orderly exchange of information between two devices.
a) Topology b) Protocol c) Transmission Media d) None of the above

2. ISO stands for
a) International Standards Organization
b) International Organization for Standardization
c) Both of above
d) None of above

3. Proposal for a new Internet standard is called
a) RFC b) Internet draft c) Draft Standard d) Proposed Standard

4. The data sent between layers is called
a) Protocol Data Unit b) Datagram c) Service Data Unit d) Packet

5.The Private Automatic Branch Exchange is an example of
a) Bus Topology b) Ring Topology c) Tree Topology d) Star Topology

6. Topology, which connects every single node in the network to every other node, is
a) Star b) Ring c) Mesh d) Bus

7. Which of the following is not a hybrid topology
a) Tree b) String c) Bus d) None of the above

8. The term 10Base2 indicates a network
a) 10 mbps speed, Base Band Signaling, 200 meters segment length
b) 10 mbps speed, Base Band Signaling, 200 meters maximum length
c) 10 mbps speed, Base Band Signaling, 185 meters segment length
d) None of the above

9. Coaxial cable, UTP cable, STP cable and fibre cables are popular network media today. Order these in increasing order of data security
a) Coaxial, UTP, STP, Fibre
b) UTP, Coaxial, STP, Fibre
c) UTP, STP, Coaxial, Fibre
d) None of the above

10. Bridges are simple devices that are used to connect LANs of
a) Different Architecture (eg. Ethernet to Token Ring)
b) Same architecture (eg. Ethernet to Ethernet)
c) Architecture does not matter
e) None of the above

11. Which application uses existing CSMA/VD over existing twisted-pair cable with bandwidths of 100 mbps?
a) 10BaseF b) 100BaseX c) 100VG-AnyLAN d) 10BaseFD

12. What model divides the network communication process into seven layers?
a) Layered Model b) TCP/IP c) OSI d) X.25

13. B-ISDN uses fiber as a transmission medium and _______ as the switching infrastructure
a) Ethernet b) FDDI c) ATM d) None of the above

14. ______ is the only standards based technology that has been designed from the beginning to accommodate the simultaneous transmission of voice, video and data
a) Home cable network b) Satellite TV c) ATM d) All of the above

15. Which of the following common LAN protocols extend to OSI network layer.
a) NetBIOS b) NetBEUI c) TCP/IP d) All of the above

16. Portability standards are discussed widely in four areas, which of the following is not one of them.
a) Operating Systems
b) Data Management
c) Programming Languages
d) Hardware

17. Which of the following is not an essential feature of Data Link Layer protocols as defined by ISO/OSI model
a) Message orientation
b) Error Detection
c) Error correction by re-transmission
d) None of the above

18. Which of the following describes the OSI Class 3 transport (TP3)
a) Do nothing
b) Signaled Error Recovery
c) Multiplexing
d) Signalled error recovery and multiplexing

19. The issue of chekpointing and synchronization is handled by which layer
a) Session Layer b) Transport Layer c) Pressentation layer d) Application Layer

20. In the OSI model, the responsibility for negotiating the encodings to be used in any perticular connection is entrusted upon
a) Application Layer b) Session Layer c) Presentation Layer d) None of the above

21. TCP/IP is built on _________ technology
a) Connection oriented b) Connection less c) Datagram d) Ethernet

22.IP addresses are ____ bit long
a) 4 b) 64 c) 48 d) 32

23. Which of the following is not a network operating system
a) Windows for Workgroup over MSDOS
b) Novell Netware
c) Windows 95
d) None of the above

24. Fiber optic token ring networks operate at the speed of
a) 16 mbps b) 100 mbps c) 1000 mbps d) 10 mbps

25. The Synchronous Optical Network is an ANSI standard. A similar standard established in Europe is
a) Synchronous Digital Hierarchy
c) Switched Multi megabit Data Service
d) Distributed Queue Duel Bus

26. In the TCP/IP protocol family ___________ provides reliable transport service.
a) Transport Protocol b) Transport Layer c) TCP d)All of above

27. IP address is a ___________ address.
a) Network Layer Address b) Layer 2 address c) Hardware Address d) None of above

28. An IP address when logically ANDed with netmask, the result is _________________.
a) Host Address b) Network Address c) Broadcast Address d) None of the above

29. Remote boot uses _______ protocol to discover IP address of diskless machine.
a) ICMP b) SNMP c) ARP d) RARP

30. Once a datagram is fragmented in a IP network it is reassembled only at ____________.
a) Next hope b) Next Router c) Final Destination d) Never

31. The source quench _________ message is used to control the rate at which datagrams are transmitted.
a) IP b) ICMP c) SNMP d) TCP

32. TCP establishes an end to end _______________ between the sender and receiver.
a) Connection b) Virtual Circuit c) Path d) None of above

33. UDP is used with ___________________ Protocol.
a) Trivial File Transfer b) ICMP c) LDAP d) All of above

34. IP is a ___________ protocol
a) Routing Protocol b) Routed Protocol c) Both of above d) None of above

35. ______ is a complex data structure that contains details about a connection
a) Socket b) Port c) TCB d) None of above

36. The bind socket call is used to __________________________
a) Bind a local application to a remote application
b) Bind a socket to local port
c) Bind a socket to a remote port
d) Bind a local port to a remote port

37. Each SNMP managed object belongs to a ______________
a) Community b) Network c) Organization D) SNMP Group

38. RTCP is the ________________ protocol designed to work with RTP
a) Application b) Control c) Network d) Transport

39. For block devices all I/O occurs through the _________________
a) Blocks b) Device c) Buffer cache d) None of above

40. _______ is a international standard file format for describing interactive 3D multimedia on the Internet.
a) DHTML b) XML c) VRML d) None of above

41. ___________ is a distance-vector routing protocol
a) RIP b) IGRP c) OSPF d) All of above

42. IPng provides security through Authentication Headers and the default encryption method is ________
a) SSL b) Public Key c) MD5 d) None of above

43. RTSP is a ___________ protocol similar to HTTP
a) Network Layer b) Internet c) Application Layer d) None of above

44. OSPF features include __________________.
a) Multi-Path routing
b) Equal-cost
c) Routing based on upper-layer TOS request
d) All of above

45. IP address is assigned to a __________.
a) Network b) Host c) Interface d) All of above

46. Token Ring network operate at a speed of
a) 10 mbps b) 100 mbps c) 20 mbps d) 16 mbps

47. Ethernet is an access method that strictly adheres to the
a) CSMA/CD b) Token Passing c) SPX/IPS d) TCP/IP

48. 100BASET4 operates at 100 mbps using base band signaling and the media is
a) Two stands of fiber
b) Two pairs of data grade UTP
c) Four pairs of telephone grade UTP
d) None of the above

49. Length of Ethernet address is
a) 24 bit b) 12 bit c) 48 bit d) 32 bit

50. Frame Relay protocol is used for
a) WAN b) LAN c) Token Ring networks d) None of the above

51. Distance of a Radio Link is limited by
a) Line of site b) Capacity of the HUB device c) Both A and B d) None of the above

52. Basic Rate ISDN service provides
a) 23B+1D Channels b) 2B+1D Channels c) 30B + 1D Channel d) None of the above

53. X.25 networks work at the maximum speed of
a) 33.6 kbps b) 128 kbps c) 64 kbps d) 2.1 mbps

54. Unit for data at Transport layer is
a) Segment b) Packet c) Frame d) Bits

55. A physical layer address of a node is
a) Always fixed
b) Changes if the NIC hardware is changed
c) Assigned by the administrator of the node
d) None of the above

56. Path determination occurs at
a) Data Link Layer b) Session Layer c) Transport Layer d) Network Layer

57. One of the following is not a function of Transport Layer.
a) Windowing b) Addressing c) Multiplexing d) Flow control

58. Network layer communicates path information using
a) ICMP b) SNMP c) Some form of routing information protocol d) None of the above

59. Applications running on a single host are identified by service access points at Transport layer and Session layer interface. These SAPs are known as
a) Ports b) Sockets c) Both A and B d) None of the above

60. Route poisoning technique is used to avoid
a) Congestion problem b) Count to infinity problem c) Traffic shaping d) None of the above

61. The Transport Layer provide
a) Best effort end to end packet delivery service
b) Connection oriented end to end packet delivery service
c) Connection oriented, reliable, end to end packet delivery service
d) None of the above

62. Application data is converted in a form suitable for transmission on the network by
a) Network Layer b) MAC Layer c) Session Layer d) Presentation Layer

63. Version 4 Internet Protocol uses
a) 32 bit flat address scheme
b) 32 bit hierarchical address scheme
c) 64 bit address
d) 128 bit address

64. Mapping between Internet Protocol address and MAC layer address are resolved using
a) RARP b) RIP c) ARP d) TCP/IP

94. A host has an IP address of and a net mask of Which one of the following statements is true?
a) The subnet number is, and the host number is 209.
b) The subnet number is, and the host number is 17.
c) The subnet number is, and the host number is 9.
d) The subnet number is, and the host number is 1.

95. Which of the following protocols is used for network management and monitoring?
a) X.500 b) SNMP c) SMTP d) X.400

96. Your network segment has a default gateway of and a subnet mask of Which of the following is true?
a) The valid range for hosts is through and all the hosts must use the same subnet mask.
b) The valid range for hosts is through and all the hosts must increase the subnet mask by one.
c) The valid range for hosts is through and all the hosts must use the same subnet mask.
d) The valid range for hosts is through and all the hosts must use the same subnet mask.

97. When developers write TCP/IP software, they have two mechanisms for transporting data from applications: TCP and UDP. Why, in many cases, is UDP used as the protocol for communications?
a) UDP has a smaller packet size, and thus can be sent around the network with more speed.
b) TCP has no mechanism to support short, choppy bursts of data, which some applications tend to produce.
c) UDP is never used for applications. It is simply a routing protocol.
d) UDP provides reliable delivery acknowledgements, which many applications need for success.

98. In a token-passing network, what can each and every device on the network be described as behaving like?
a) A proxy. b) A router. c) A bridge. d) Repeater

99. You have become increasingly concerned with the activity at the Logical Link Layer of the IPX/SPX stack on a certain workstation. What data form should you be concentrating on at this level?
a) Frames b) Packets c) Datagrams d) Bits

100. TCP/IP Protocol Architecture was designed to carry data over the ARPANET. What type of network is the ARPANET?
a) Message switching network.
b) Packet switching network.
c) Packet routing network.
d) A hybrid of a packet and message routing network.

101. Your company has been assigned a Class B IP address. You are administrating a country-wide network with 45 individual subnets. Over the next year, you will be adding 60 subnets. What subnet mask should you use that will allow the most hosts per subnet?
a) b) c) d)

102. What layer of the OSI model handles such issues as file access and transfer and virtual terminal emulation?
a) Application b) Network c) Transport d) Session

103. You have implemented RSA encryption technology on your network. It seems to be working well. However, one station always receives encrypted emails as garbled text, meaning the protocol stack is corrupted. What OSI layer above can be assumed to be faulty?
a) Data Link Layer b) Presentation Layer c) Session Layer d) Transport Layer

104. What is the maximum segment length for 10Broad36?
a) 85 meters b) 200 meters c) 36 meters d) 3600 meters

105. Which networking standard describes cabling requirements for Ethernet?
a) 802.2 b) 802.3 c) 802.4 d) 802.5

106. You have been given the Class C address of What size subnet mask will give you the greatest possible number of hosts?
a) An 8-bit mask of for 254 hosts.
b) An 8-bit mask of for 254 hosts.
c) An 8-bit mask of for 65,534 hosts.
d) An 8-bit mask of for 8190 hosts.

107. Describe a fully-meshed star network.
a) A network with a central router that has a unique path to each end-point router and some of the end-point routers have links to one another.
b) A network with a central router that feeds a number of smaller routers that in turn feed a number of end-point routers.
c) A network with a central router that has a unique path to each end-point router.
d) A network in which all the routers have unique paths to one another

108. Why is SNMP considered lacking in security?
a) SNMP devices send messages about their failing conditions.
b) The SNMP manager broadcasts sensitive information to the managed devices.
c) The SNMP passwords are clear ASCII text.
d) SNMP passwords cannot be changed.

109. Which one of the following statements correctly describes differences between a bridge and a layer two switch?
a) A layer two switch is a high speed, multi-port bridge.
b) A layer two switch cannot use the Spanning Tree Protocol to learn a network’s topology, while
c) A layer two switch can support multiple network media types, such as twisted pair, fiber, and coax, while a bridge is limited to supporting a single network media type.
d) A layer two switch is than an Ethernet hub that supports different speeds on different ports, while a bridge requires all ports to have the same speed.

110. How are packet forwarding decisions made in an OSI reference model layer three device?
a) The device compares the destination MAC address to an internal table that associates MAC addresses to particular ports.
b) In a layer three device, every packet is sent out of every port.
c) In a layer three device, packets are forwarded based on node name.
d) The device compares the destination network address to an internal table that associates network addresses to particular ports.

111.Which one of the following describes the IP address
a) A Class A address that is 32 bits in length
b) A Class B address that is 16 bits in length
c) A Class B address that is 32 bits in length
d) A Class C address that is 32 bits in length

112. What is the main function of a router?
a) Setting up communications between networks that use dissimilar IP segments but the same Subnet Masks
b) Connecting logically separate network segments.
c) Providing IP configuration to computers using DHCP
d) Authenticating users to the network
e) Connecting to the Internet.

113. Network cards in computers communicate with each other using unique MAC addresses, similar to street addresses. Where do these unique addresses come from?
a) The network administrator makes up addresses to use and then programs them into the software.
b) The manufacturer publishes a range of addresses in the manual that you choose from.
c) The network card searches the network and then assigns itself a unique address from an elaborate algorithm using the alread-allocated addresses.
d) The IEEE assigns every manufacturer a prefix and a block of address range, typically expressed in hexadecimala bridge can.

CDAC Placement Papers

About CDAC

Centre for Development of Advanced Computing (C-DAC) is the premier R&D organization of the Ministry of Electronics and Information Technology (MeitY) for carrying out R&D in IT, Electronics and associated areas.  Different areas of C-DAC, had originated at different times, many of which came out as a result of identification of opportunities.

  • The setting up of C-DAC in 1988 itself was to built Supercomputers in context of denial of import of Supercomputers by USA. Since then C-DAC has been undertaking building of multiple generations of Supercomputer starting from PARAM with 1 GF in 1988.
  • Almost at the same time, C-DAC started building Indian Language Computing Solutions with setting up of GIST group (Graphics and Intelligence based Script Technology); National Centre for Software Technology (NCST) set up in 1985 had also initiated work in Indian Language Computing around the same period.
  • Electronic Research and Development Centre of India (ER&DCI) with various constituents starting as adjunct entities of various State Electronic Corporations, had been brought under the hold of Department of Electronics and Telecommunications (now MeitY) in around 1988. They were focusing on various aspects of applied electronics, technology and applications.
  • With the passage of time as a result of creative ecosystem that got set up in C-DAC, more areas such as Health Informatics, etc., got created; while right from the beginning the focus of NCST was on Software Technologies; similarly C-DAC started its education & training activities in 1994 as a spin-off with the passage of time, it grew to a large efforts to meet the growing needs of Indian Industry for finishing schools.Visit offical website of CDAC for more details.

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