Saved Bookmarks
This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The TTL field has value 10. How many routers (max) can process this datagram?(a) 11(b) 5(c) 10(d) 1 |
|
Answer» Correct choice is (c) 10 The explanation: TTL stands for Time to Live. This field specifies the life of the IP packet based on the number of hops it makes (Number of routers it goes through). TTL field is decremented by one each time the datagram is processed by a router. When the value is 0, the packet is automatically destroyed. |
|
| 2. |
In TCP, sending and receiving data is done as _______(a) Stream of bytes(b) Sequence of characters(c) Lines of data(d) Packets |
|
Answer» Right option is (a) Stream of bytes For explanation: TCP provides stream oriented delivery between hosts communicating via an IP network and there are no message boundaries. TCP can concatenate data from a number of send () commands into one stream of data and still transmit it reliably. |
|
| 3. |
What should be the flag value to indicate the last fragment?(a) 0(b) 1(c) TTl value(d) Protocol field value |
|
Answer» The correct choice is (a) 0 To explain I would say: The Flag field in the IP header is used to control and identify the fragments. It contains three bits: reserved, don’t fragment and more fragments. If the more fragments bit is 0, it means that the fragment is the last fragment. |
|
| 4. |
User agent does not support this ___________(a) Composing messages(b) Reading messages(c) Replying messages(d) Routing messages |
|
Answer» Correct choice is (d) Routing messages To explain: The user agent is basically a software program that allows the user to send, and receive e-mail messages. Routing of the message is done by the Message Transfer Agent. |
|
| 5. |
If the value in protocol field is 17, the transport layer protocol used is _____________(a) TCP(b) UDP(c) ICMP(d) IGMP |
|
Answer» Correct choice is (b) UDP Explanation: The protocol field enables the demultiplexing feature so that the IP protocol can be used to carry payloads of more than one protocol type. Its most used values are 17 and 6 for UDP and TCP respectively. ICMP and IGMP are network layer protocols. |
|
| 6. |
The underlying Transport layer protocol used by SMTP is ________(a) TCP(b) UDP(c) Either TCP or UDP(d) IMAP |
|
Answer» Right option is (a) TCP To explain: TCP is a reliable protocol, and Reliability is a mandatory requirement in e-mail transmission using SMTP. |
|
| 7. |
Which of the following is not a type of OSPF packet?(a) Hello(b) Link-state request(c) Link-state response(d) Link-state ACK |
|
Answer» The correct choice is (c) Link-state response For explanation: The five types of OSPF packets are: Hello, Database description, Link-state request, Link-state update, and Link-state ACK. There is no Link-state response packet; the neighbor router sends a Link-state update packet as a response to the Link-state request packet if there is an update in the routing table. |
|
| 8. |
In OSPF database descriptor packet, which field is used to detect a missing packet?(a) LSA header(b) MS(c) Database descriptor sequence number(d) Options |
|
Answer» Correct option is (c) Database descriptor sequence number The explanation is: Sequence number field is used to detect a missing packet. The packets are to be received in order of the sequence number, so if the receiver detects that there is a sequence number skipped or missing in the order, it stops processing the further received packets and informs the sender to retransmit the packets in sequence. |
|
| 9. |
Which of the following modulation schemes is supported by WiMAX?(a) binary phase shift keying modulation(b) quadrature phase shift keying modulation(c) quadrature amplitude modulation(d) all of the mentioned |
|
Answer» Right choice is (d) all of the mentioned Best explanation: WiMAX supports a variety of modulation schemes such as binary phase shift keying modulation, quadrature phase shift keying modulation, and quadrature amplitude modulation and allows for the scheme to change on a burst-by-burst basis per link, depending on channel conditions. |
|
| 10. |
WiMAX provides _______(a) VoIP services(b) IPTV services(c) Both VoIP and IPTV services(d) no IPTV services |
|
Answer» Correct choice is (c) Both VoIP and IPTV services The explanation: IPTV can be transmitted over WiMAX, and relies on packet-switching to offer reliable delivery. VoIP can be operated over a WiMax network with no special hardware or software. |
|
| 11. |
For encryption, WiMAX supports _______(a) advanced encryption standard(b) triple data encryption standard(c) advanced encryption standard and triple data encryption standard(d) double data encryption standard |
|
Answer» The correct choice is (c) advanced encryption standard and triple data encryption standard To elaborate: Both advanced encryption standard and triple data encryption standard are block cipher techniques and are popularly used in WiMAX and other applications for secure encryption. |
|
| 12. |
WiMAX provides ________(a) simplex communication(b) half duplex communication(c) full duplex communication(d) no communication |
|
Answer» The correct choice is (c) full duplex communication The explanation is: WiMax was developed to provide wireless broadband access to buildings. It can also be used to connect WLAN hotspots to the Internet. It is based on IEEE 802.16 standards. |
|
| 13. |
In HTTP pipelining ________________(a) multiple HTTP requests are sent on a single TCP connection without waiting for the corresponding responses(b) multiple HTTP requests can not be sent on a single TCP connection(c) multiple HTTP requests are sent in a queue on a single TCP connection(d) multiple HTTP requests are sent at random on a single TCP connection |
|
Answer» The correct answer is (a) multiple HTTP requests are sent on a single TCP connection without waiting for the corresponding responses The best I can explain: HTTP pipelining helps the client make multiple requests without having to waiting for each response, thus saving a lot of time and bandwidth for the client. |
|
| 14. |
The time required to examine the packet’s header and determine where to direct the packet is part of __________(a) Processing delay(b) Queuing delay(c) Transmission delay(d) Propagation delay |
|
Answer» The correct choice is (a) Processing delay The best I can explain: Processing delay is induced at a router’s or other network processor’s end in the path of the packet and is caused by the time taken by the processor to examine the packet’s header to decide the further path of the packet. |
|
| 15. |
In Go-Back-N window, when the timer of the packet times out, several packets have to be resent even some may have arrived safe. Whereas in Selective Repeat window, the sender resends ___________(a) Packet which are not lost(b) Only those packets which are lost or corrupted(c) Packet from starting(d) All the packets |
|
Answer» Right option is (b) Only those packets which are lost or corrupted Explanation: In Selective Repeat, the sender side uses a searching algorithm to find the packets which need to be retransmitted based on the negative acknowledgements received and then resends only those packets thus saving bandwidth. |
|
| 16. |
ISP exchanges internet traffic between their networks by __________(a) internet exchange point(b) subscriber end point(c) isp end point(d) internet end point |
|
Answer» Correct option is (a) internet exchange point The best I can explain: ISPs exchange internet traffic between their networks by using Internet Exchange Points. ISPs and CDNs are connected to each other at these physical locations are they help them provide better service to their customers. |
|
| 17. |
In OSPF database descriptor packet, if there are more database descriptor packets in the flow, ‘M’ field is set to ____________(a) 1(b) 0(c) more(d) -1 |
|
Answer» Right option is (a) 1 For explanation: The “M” bit is the more bit, which indicates that there are more packets to be received in the descriptor packet flow whenever it is set to 1. There is also an “I” bit which indicates if the packet is first in the flow. |
|
| 18. |
What are the different types of programming language. |
|
Answer» The different types of programming languages are discussed below.
|
|
| 19. |
Datagram networks mainly refers to _________(a) Connection oriented networks(b) Connection less networks(c) Telephone networks(d) Internetwork |
|
Answer» The correct option is (b) Connection less networks To explain I would say: The switch does not keep the information about the connection state, hence it is connection less. There is no need for establishing a handshake to begin the transmission in such networks. |
|
| 20. |
Which of the following networks supports pipelining effect?(a) Circuit-switched networks(b) Message-switched networks(c) Packet-switched networks(d) Stream-switched networks |
|
Answer» The correct answer is (c) Packet-switched networks For explanation I would say: Packet switched network is most preferred for pipelining process. Pipelining exponentially reduces the time taken to transmit a large number of packets in the network. |
|
| 21. |
An endpoint of an inter-process communication flow across a computer network is called __________(a) socket(b) pipe(c) port(d) machine |
|
Answer» Right answer is (a) socket Explanation: Socket is one end point in a two way communication link in the network. TCP layer can identify the application that data is destined to be sent by using the port number that is bound to socket. |
|
| 22. |
A single channel is shared by multiple signals by ____________(a) analog modulation(b) digital modulation(c) multiplexing(d) phase modulation |
|
Answer» Correct answer is (c) multiplexing The best I can explain: In communication and computer networks, the main goal is to share a scarce resource. This is done by multiplexing, where multiple analog or digital signals are combined into one signal over a shared medium. The multiple kinds of signals are designated by the transport layer which is the layer present on a higher level than the physical layer. |
|
| 23. |
In wireless network an extended service set is a set of ________(a) connected basic service sets(b) all stations(c) all access points(d) connected access points |
|
Answer» The correct option is (a) connected basic service sets Best explanation: The extended service set is a part of the IEEE 802.11 WLAN architecture and is used to expand the range of the basic service set by allowing connection of multiple basic service sets. |
|
| 24. |
Which of the following is not a transition strategy?(a) Dual stack(b) Tunneling(c) Conversion(d) Header translation |
|
Answer» Correct option is (c) Conversion For explanation: As IPv4 addresses are of 32 bits and IPv6 addresses are of 128 bits, it is not possible to convert IPv4 address to IPv6 address. So, Dual stack, tunneling and header translation are the three strategies which might help in the transition from IPv4 to IPv6. |
|
| 25. |
SONET stands for ___________(a) synchronous optical network(b) synchronous operational network(c) stream optical network(d) shell operational network |
|
Answer» Correct option is (a) synchronous optical network Explanation: SONET stands for synchronous optical network. Frame relay uses SONET to physically transmit data frames over a Frame Relay network as SONET is cheaper and provides better network reliability than other carriers. |
|
| 26. |
Which of the following frequencies is not used in WiMAX for communication?(a) 2.3 GHz(b) 2.4 GHz(c) 2.5 GHz(d) 3.5 GHz |
|
Answer» Right option is (b) 2.4 GHz Easy explanation: The 2.4GHz ISM frequency band is used for personal area network technologies such as Bluetooth and hence is not suitable for WiMAX which is mostly used for Metropolitan Area Networks. |
|
| 27. |
Devices that provide the connectivity to a WiMAX network are known as _________(a) subscriber stations(b) base stations(c) gateway(d) switch stations |
|
Answer» Right choice is (a) subscriber stations For explanation I would say: Subscriber stations in WiMAX are transceivers (transmitter and receivers). They are used to convert radio signals into digital signals that can be routed to and from communication devices. There is a variety of types of WiMAX subscriber stations like portable PCMCIA cards and fixed stations that provide service to multiple users. |
|
| 28. |
To determine which version to use when sending a packet to a destination, the source host queries which of the following?(a) Dual stack(b) Domain Name Server(c) Header information(d) Transport layer |
|
Answer» The correct answer is (b) Domain Name Server Easy explanation: Source host queries DNS to determine which version to use when sending a packet to a destination. The DNS contains both, the IPv4 and IPv6 addresses of the modern dual stack host servers. |
|
| 29. |
During debugging, we can use the ____________ program to find if a host is alive and responding.(a) traceroute(b) shell(c) ping(d) java |
|
Answer» Correct option is (c) ping To explain I would say: Ping program is used to find if a host is alive and responding. It is to be entered into a command line with the syntax “ping (IP address)” to be executed. Traceroute is a program used to find the shortest route to the destination IP. |
|
| 30. |
The File Transfer Protocol is built on ______________(a) data centric architecture(b) service oriented architecture(c) client server architecture(d) connection oriented architecture |
|
Answer» Right option is (c) client server architecture Explanation: The FTP connection includes a Server and a Client which wish to share files. The server can have multiple clients at the same time while the client communicates with only one server at a time. |
|
| 31. |
Change the following sentences into indirect speech : (a) He said to me, "Are you hungry?"(b) The doctor said to the patient, "Take exercise daily."(c) He said to me, "I am your friend." |
|
Answer» (a) He asked me if I was hungry. (b) The doctor advised the patient to take exercise daily. (c) He told me that he was my friend. |
|
| 32. |
EIGRP sends a hello message after every ___________ seconds.(a) 5 seconds (LAN), 60 seconds (WAN)(b) 5 seconds (LAN), 5 seconds (WAN)(c) 15s(d) 180s |
|
Answer» The correct answer is (a) 5 seconds (LAN), 60 seconds (WAN) Easy explanation: EIGRP routers broadcast the hello packets frequently to familiarize with the neighbors. EIGRP routers send the hello message after every 5 seconds on LAN, and every 60 seconds on WAN. |
|
| 33. |
Change the following sentences into passive voice :(a) Open the window.(b) Let him do it.(c) I have read this essay. |
|
Answer» (a) Let the window be opened. (b) Let it be done. (c) This essay has been read by me. |
|
| 34. |
The EIGRP metric values include:(a) Delay(b) Bandwidth(c) MTU(d) All of the mentioned |
|
Answer» Correct option is (d) All of the mentioned To explain: The EIGRP metric values are Delay, Bandwidth, and MTU. MTU stands for Maximum Transmission Unit. They are combined together to give the overall EIGRP cost in K-values. |
|
| 35. |
Administrative distance for external EIGRP route is _______(a) 90(b) 170(c) 110(d) 100 |
|
Answer» Correct choice is (b) 170 The best explanation: Routers use the metric of administrative distance to select the best path when there are different routes to the same destination from two different routing protocols as it is a measure of reliability of routing protocols. Administrative distance for external EIGRP is 170. |
|
| 36. |
Administrative distance for internal EIGRP is ______(a) 90(b) 170(c) 110(d) 91 |
|
Answer» Correct option is (a) 90 For explanation: Routers use the metric of administrative distance to select the best path when there are different routes to the same destination from two different routing protocols as it is a measure of reliability of routing protocols. Administrative distance for internal EIGRP is 90. |
|
| 37. |
A 4 byte IP address consists of __________(a) only network address(b) only host address(c) network address & host address(d) network address & MAC address |
|
Answer» Correct answer is (c) network address & host address Easy explanation: An ip address which is 32 bits long, that means it is of 4 bytes and is composed of a network and host portion and it depends on address class. The size of the host address and network address depends upon the class of the address in classful IP addressing. |
|
| 38. |
The network layer is concerned with __________ of data.(a) bits(b) frames(c) packets(d) bytes |
|
Answer» The correct answer is (c) packets The best explanation: In computer networks, the data from the application layer is sent to the transport layer and is converted to segments. These segments are then transferred to the network layer and these are called packets. These packets are then sent to data link layer where they are encapsulated into frames. These frames are then transferred to physical layer where the frames are converted to bits. |
|
| 39. |
EIGRP uses the ____________ algorithm for finding shortest path.(a) SPF(b) DUAL(c) Linkstat(d) Djikstra’s |
|
Answer» Right choice is (b) DUAL The explanation is: EIGRP uses the DUAL algorithm for finding shortest path. DUAL stands for diffusing update algorithm and it is used to prevent routing loops by recalculating routes globally. |
|
| 40. |
EIGRP can support ____________(a) VLSM/subnetting(b) Auto summary(c) Unequal cast load balancing(d) All of the mentioned |
|
Answer» Correct option is (d) All of the mentioned Explanation: EIGRP supports variable and fixed length subnetting, Auto summary, and Unequal cast load balancing to provide efficient routing functionality on Cisco routers. |
|
| 41. |
What is start frame delimeter (SFD) in ethernet frame?(a) 10101010(b) 10101011(c) 00000000(d) 11111111 |
|
Answer» The correct option is (b) 10101011 For explanation: The start frame delimiter is a 1 byte field in the Ethernet frame that indicates that the preceding bits are the start of the frame. It is always set to 10101011. |
|
| 42. |
Ethernet frame consists of ____________(a) MAC address(b) IP address(c) Default mask(d) Network address |
|
Answer» Right answer is (a) MAC address Easy explanation: The Ethernet frame has a header that contains the source and destination MAC address. Each MAC address is of 48 bits. |
|
| 43. |
The physical layer is concerned with ___________(a) bit-by-bit delivery(b) process to process delivery(c) application to application delivery(d) port to port delivery |
|
Answer» Right option is (a) bit-by-bit delivery To explain: Physical layer deals with bit to bit delivery in networking. The data unit in the physical layer is bits. Process to process delivery or the port to port delivery is dealt in the transport layer. The various transmission mediums aid the physical layer in performing its functions. |
|
| 44. |
Describe the propagation methods in rose cultivation |
|
Answer» Rose is mainly propagated by cuttings and budding. T-budding is considered the best for propagation of roses. Cuttings: Matured cuttings of 20cm –30cm long are cut and the leaves are removed. The cuttings then are dipped in solution of IBA for promoting root growth. These cuttings are used for planting as well as for raising rootstocks for budding. Budding and Grafting: it is the operation in which a bud or a part of tissue of one plant is transferred to another plant by various proper techniques. The main objective is to enable one to utilize the vigorous root system of other for proper combination using the best characters of both the variety which gives the root system is called as ‘Stock’ and the cultivar grafted upon stock is called ‘Scion’ |
|
| 45. |
For a 10Mbps Ethernet link, if the length of the packet is 32bits, the transmission delay is ____________ (in microseconds)(a) 3.2(b) 32(c) 0.32(d) 320 |
|
Answer» Correct choice is (a) 3.2 To elaborate: Transmission rate = length / transmission rate = 32/10 = 3.2 microseconds. |
|
| 46. |
Choose the correct tense forms of the verbs given in brackets and fill in the blanks with them : (a) My mother ............. (work) in this office for the last twenty years..(b) The Hindu newspaper ............. (come) on time.(c) I just ............. (finish) the task. |
|
Answer» (a) My mother has been working in this office for the last twenty years. (b) The Hindu newspaper comes on time. (c) I have just finished the task. |
|
| 47. |
EIGRP metric is ________(a) K-values(b) Bandwidth only(c) Hop Count(d) Delay only |
|
Answer» Right option is (a) K-values The explanation: EIGRP metric is K-values which are integers from 0 to 128. They are used to calculate the overall EIGRP cost with bandwidth and delay metrics. |
|
| 48. |
Which one of the following is not true?(a) multiple hostnames may correspond to a single IP address(b) a single hostname may correspond to many IP addresses(c) a single hostname may correspond to a single IP address(d) none of the mentioned |
|
Answer» The correct option is (c) a single hostname may correspond to a single IP address To elaborate: It need not be that a single hostname will correspond to a ip address. For example facebook.com and fb.com both correspond to same ip address. So there can be multiple hostnames for a single ip address. |
|
| 49. |
SSH can be used in only _____________(a) unix-like operating systems(b) windows(c) both unix-like and windows systems(d) none of the mentioned |
|
Answer» The correct choice is (c) both unix-like and windows systems To explain: SSH isn’t confined to a certain network or operating system. It can be implemented over different networks and on different operating systems. |
|
| 50. |
Use the following idioms and phrases in sentences of your own so as to bring out their meaning clearly : (a) Look for (b) Take off (c) Wait for |
|
Answer» (a) He is looking for his missing book. (b) She took off his shoes. (c) I am waiting for my friend. |
|