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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. |
2tan30°/1-tan230°(A) 1/√3(B) √3(C) 1(D) 2 |
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Answer» Correct option is: (B) \(\sqrt{3}\) |
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| 2. |
What does the echo statement so? |
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Answer» They are both used to output data to the screen. The differences are small: echo has no return value while print has a return value of 1 so it can be used in expressions. echo can take multiple parameters (although such usage is rare) while print can take one argument. |
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| 3. |
What is an Operating system? Give an example. |
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Answer» An operating system or OS is a software program that enables the computer hardware to communicate and operate with the computer software. Windows 8 is an example of a latest operating system. |
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| 4. |
List the different types of ROM? |
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Answer» The different types of ROM are Programmable ROM(PROM), Erasable Programmable ROM(EPROM) and Electrically Erasable Programmable ROM (EEPROM). |
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| 5. |
Mention any two features of ENIAC. |
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Answer» In one second, the ENIAC could perform 5,000 additions, 357 multiplications or 38 divisions. |
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| 6. |
Statement to convert the string '275' stored in a variable number to a numeric value. |
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Answer» String s =“275”; int a = Integer.parseInt(s); |
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| 7. |
How many rows and columns are present in ESS? |
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Answer» There are 256 rows and 65536 columns in an electronic spread sheet. |
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| 8. |
Which are the standard alignments used in a word processor? |
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Answer» The standard alignments used in a word processor are left, right, center and justify. |
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| 9. |
What is testing? |
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Answer» It is the process of checking the program logic, by providing selected sample data and observing the output for correctness. |
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| 10. |
Who is called as the “Father of Computer”? |
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Answer» Charles Babbage is called as the “Father of Computer”. |
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| 11. |
Cryptanalysis is used __________(a) to find some insecurity in a cryptographic scheme(b) to increase the speed(c) to encrypt the data(d) to make new ciphers |
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Answer» Correct option is (a) to find some insecurity in a cryptographic scheme Explanation: Cryptanalysis is a field of study in which a cryptographic scheme is intentionally tried to breach in order to find flaws and insecurities. It is used to make sure that the scheme is least vulnerable to attacks. |
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| 12. |
In classless addressing, there are no classes but addresses are still granted in ______(a) IPs(b) Blocks(c) Codes(d) Sizes |
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Answer» Correct option is (b) Blocks Best explanation: In classless addressing, there are no classes but addresses are still granted in blocks. The total number of addresses in a block of classless IP addresses = 2^(32 – CIDR_value). |
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| 13. |
Network congestion occurs _________(a) in case of traffic overloading(b) when a system terminates(c) when connection between two nodes terminates(d) in case of transfer failure |
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Answer» The correct answer is (a) in case of traffic overloading Explanation: Network congestion occurs when traffic in the network is more than the network could handle. To avoid network congestion, the network management uses various open-loop and closed-loop congestion control techniques. |
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| 14. |
Which field helps to check rearrangement of the fragments?(a) Offset(b) Flag(c) TTL(d) Identifier |
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Answer» Right choice is (a) Offset Easiest explanation: The Fragment Offset field specifies where the fragment fits in the original datagram. The offset of the first fragment will always be 0. The size of the field (13 bits) is 3-bits shorter than the size of the total length field (16 bits). |
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| 15. |
The outcome of Dijkstra’s calculation is used to populate the __________(a) Topology table(b) Routing table(c) Neighbor table(d) Adjacency table |
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Answer» Correct option is (b) Routing table Easiest explanation: The outcome of Djikstra’s calculation is the main source of entries in the routing table as it is the algorithm that is used to find the shortest path in OSPF. The calculations are done after receiving every new LSU. |
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| 16. |
Which of this is not a constituent of residential telephone line?(a) A high-speed downstream channel(b) A medium-speed downstream channel(c) A low-speed downstream channel(d) An ultra-high speed downstream channel |
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Answer» Correct option is (c) A low-speed downstream channel Explanation: A low-speed downstream channel is not a constituent of a residential telephone line. But it might be just a two-way telephone channel. Internet can be provided through a high-speed downstream channel in a residential telephone line. |
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| 17. |
Geostationary satellites ___________(a) Are placed at a fixed point above the earth(b) Rotate the earth about a fixed axis(c) Rotate the earth about a varying axis(d) All of the mentioned |
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Answer» Correct choice is (a) Are placed at a fixed point above the earth The best explanation: They are placed in orbit at 36,000km above Earth’s surface. |
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| 18. |
Most packet switches use this principle ____________(a) Stop and wait(b) Store and forward(c) Store and wait(d) Stop and forward |
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Answer» Right option is (b) Store and forward Easy explanation: The packet switch will not transmit the first bit to outbound link until it receives the entire packet. If the entire packet is not received and the time-out period expires, the packet switch will inform the sender to resend the part of packet or the entire packet based on the algorithm being used. |
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| 19. |
What is WPA?(a) wi-fi protected access(b) wired protected access(c) wired process access(d) wi-fi process access |
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Answer» The correct option is (a) wi-fi protected access Easy explanation: WPA or WiFi Protected Access is a security protocol used to provide users and firms with strong data security and protection for their wireless networks (WiFi) to give them confidence that only authorized users can access their network. |
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| 20. |
Which of the following demerits does Fragmentation have?(a) complicates routers(b) open to DOS attack(c) overlapping of fragments.(d) all of the mentioned |
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Answer» Right option is (d) all of the mentioned The explanation: Fragmentation makes the implementation of the IP protocol complex and can also be exploited by attackers to create a DOS attack such as a teardrop attack. Fragmentation won’t be required if the transport layer protocols perform wise segmentation. |
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| 21. |
What is the IP protocol number for OSPF packets?(a) 89(b) 86(c) 20(d) 76 |
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Answer» Right option is (a) 89 Easy explanation: 89 is the IP protocol number for OSPF packets. 86 is the protocol number for DGP, 76 is the protocol number for Backroom-SATNET-Monitoring and 20 is the protocol number for Host Monitoring Protocol. |
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| 22. |
Which field helps to check rearrangement of the fragments?(a) offset(b) flag(c) ttl(d) identifer |
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Answer» Correct option is (a) offset Easiest explanation: The Fragment Offset field specifies where the fragment fits in the original datagram. The offset of the first fragment will always be 0. The size of the field (13 bits) is 3-bits shorter than the size of the total length field (16 bits). |
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| 23. |
Which of the following demerits does Fragmentation have?(a) Complicates routers(b) Open to DOS attack(c) Overlapping of fragments(d) All of the mentioned |
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Answer» Right answer is (d) All of the mentioned Best explanation: Fragmentation makes the implementation of the IP protocol complex and can also be exploited by attackers to create a DOS attack such as a teardrop attack. Fragmentation won’t be required if the transport layer protocols perform wise segmentation. |
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| 24. |
What is data encryption standard (DES)?(a) block cipher(b) stream cipher(c) bit cipher(d) byte cipher |
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Answer» Correct option is (a) block cipher The explanation is: DES is a symmetric key block cipher in which the block size is 64 bits and the key size is 64 bits. It is vulnerable to some attacks and is hence not that popularly used. |
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| 25. |
What is Wired Equivalent Privacy (WEP)?(a) security algorithm for ethernet(b) security algorithm for wireless networks(c) security algorithm for usb communication(d) security algorithm for emails |
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Answer» Correct option is (b) security algorithm for wireless networks For explanation I would say: WEP is a security algorithm for wireless network which intended to provide data confidentiality comparable to that of traditional wired networks. It was introduced in 1997. |
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| 26. |
A local telephone network is an example of a _______ network.(a) Packet switched(b) Circuit switched(c) Bit switched(d) Line switched |
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Answer» Right answer is (b) Circuit switched Best explanation: Circuit switching is connection oriented switching technique, whereas in the case of packet switching, it is connectionless. Circuit switching is implemented in the Physical layer, whereas packet switching is implemented in the Network layer. Internet too is based on the concept of circuit switching. |
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| 27. |
ElGamal encryption system is __________(a) symmetric key encryption algorithm(b) asymmetric key encryption algorithm(c) not an encryption algorithm(d) block cipher method |
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Answer» Correct choice is (b) asymmetric key encryption algorithm To elaborate: The ELGamal encryption system was made by Taher Elgamal in the year 1985 and is an asymmetric key algorithm. It is popularly used in PGP and other systems. |
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| 28. |
Which of these is not applicable for IP protocol?(a) Connectionless(b) Offer reliable service(c) Offer unreliable service(d) Does not offer error reporting |
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Answer» The correct option is (b) Offer reliable service Easy explanation: IP does not provide reliable delivery service for the data. It’s dependent upon the transport layer protocols like TCP to offer reliability. |
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| 29. |
Which of these is not applicable for IP protocol?(a) is connectionless(b) offer reliable service(c) offer unreliable service(d) does not offer error reporting |
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Answer» Correct option is (b) offer reliable service The best explanation: IP does not provide reliable delivery service for the data. It’s dependent upon the transport layer protocols like TCP to offer reliability. |
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| 30. |
Which of the following is not applicable for IP?(a) Error reporting(b) Handle addressing conventions(c) Datagram format(d) Packet handling conventions |
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Answer» Correct option is (a) Error reporting To explain I would say: The Internet Protocol is the networking protocol which establishes the internet by relaying datagrams across network boundaries. ICMP is a supporting protocol for IP which handles the Error Reporting functionality. |
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| 31. |
DSL telcos provide which of the following services?(a) Wired phone access(b) ISP(c) Wired phone access and ISP(d) Network routing and ISP |
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Answer» The correct choice is (c) Wired phone access and ISP Best explanation: DSL stands for Digital Subscriber Line and ISP stands for Internet Service Provider. In a Digital Subscriber Line system, the same company which provides phone connection is also an ISP. The internet is provided through the pre-installed telephone lines. |
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| 32. |
The function of DSLAM is to __________(a) Convert analog signals into digital signals(b) Convert digital signals into analog signals(c) Amplify digital signals(d) De-amplify digital signals |
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Answer» Right choice is (a) Convert analog signals into digital signals To elaborate: DSLAM stands for Digital Subscriber Line Access Multiplexer and it’s used by Telcos to convert the analog signals to digital signals for the purpose of providing internet. The DSLAM located in a telco’s Central Office does this function. |
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| 33. |
Which of the following is not a step in the Header translation procedure?(a) The IPv6 mapped address is changed to an IPv4 address by extracting the rightmost 32bits(b) The value of the IPv6 priority field is discarded(c) The type of service field in IPv4 is set to zero(d) The IPv6 flow label is considered |
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Answer» The correct answer is (d) The IPv6 flow label is considered For explanation: In the header translation procedure, first the IPv6 mapped address is changed to an IPv4 address by extracting the rightmost 32bits, then the value of the IPv6 priority field is discarded, and finally the ToS field in the IPv4 header is set to zero. IPv6 flow label is ignored in the procedure. |
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| 34. |
Internet works on _______(a) packet switching(b) circuit switching(c) both packet switching and circuit switching(d) data switching |
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Answer» Right option is (a) packet switching For explanation: Packet switching is the method based on which the internet works. Packet switching features delivery of packets of data between devices over a shared network. |
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| 35. |
Voice privacy in GSM cellular telephone protocol is provided by _______(a) A5/2 cipher(b) b5/4 cipher(c) b5/6 cipher(d) b5/8 cipher |
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Answer» Right answer is (a) A5/2 cipher The explanation: The A5/2 cipher was published in the year 1996 and was cryptanalysed in the same year within a month. It’s use was discontinued from the year 2006 as it was really weak. |
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| 36. |
Which of the following terms is not associated with DSL?(a) DSLAM(b) CO(c) Splitter(d) CMTS |
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Answer» The correct option is (d) CMTS The best I can explain: CMTS stands for Cable modem termination system. It is used in cable internet access. In cable internet access, internet is not provided through telephone lines and the companies that provide such connections don’t necessarily provide telephone access. |
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| 37. |
Which of the following is not applicable for IP?(a) Error reporting(b) Handle addressing conventions(c) Datagram format(d) Packet handling |
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Answer» Correct answer is (a) Error reporting For explanation I would say: The Internet Protocol is the networking protocol that establishes the internet by relaying datagram across network boundaries. ICMP is a supporting protocol for IP which handles the Error Reporting functionality. |
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| 38. |
HFC contains _______(a) Fibre cable(b) Coaxial cable(c) A combination of Fibre cable and Coaxial cable(d) Twisted Pair Cable |
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Answer» Right option is (c) A combination of Fibre cable and Coaxial cable To explain I would say: Hybrid fiber-coaxial (HFC) is a telecommunications industry term for a broadband network that combines optical fiber and coaxial cable. It has been popularly used since the early 1990s. It is stronger than the optical fiber cables and faster than the co-axial cables. |
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| 39. |
Which of the following field in IPv4 datagram is not related to fragmentation?(a) Flags(b) Offset(c) TOS(d) Identifier |
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Answer» Right option is (c) TOS For explanation: TOS-type of service identifies the type of packets. It is not related to fragmentation but is used to request specific treatment such as high throughput, high reliability or low latency for the IP packet depending upon the type of service it belongs to. |
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| 40. |
Transmission delay does not depend on _____________(a) Packet length(b) Distance between the routers(c) Transmission rate(d) Bandwidth of medium |
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Answer» Right choice is (b) Distance between the routers Easiest explanation: Transmission delay = packet length / transmission rate. The transmission rate depends upon the bandwidth of the medium. |
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| 41. |
Which of the following statements is not applicable for cable internet access?(a) It is a shared broadcast medium(b) It includes HFCs(c) Cable modem connects home PC to Ethernet port(d) Analog signal is converted to digital signal in DSLAM |
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Answer» Right answer is (d) Analog signal is converted to digital signal in DSLAM To elaborate: CMTS stands for Cable modem termination system. In cable access analog signal is converted to digital signal by CMTS. In cable internet access, internet is not provided through telephone lines. DSLAM is used by Telecom companies. |
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| 42. |
Give the name of a multi-branch selection statement. |
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Answer» The multi-branch selection statement is called as ‘switch-case’ statement. |
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| 43. |
Propagation delay depends on ___________(a) Packet length(b) Transmission rate(c) Distance between the routers(d) Speed of the CPU |
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Answer» The correct answer is (c) Distance between the routers To explain: Propagation delay is caused when the packet is in its electric signal form and is travelling through a medium (a wire or a electromagnetic wave). Propagation delay is the time it takes a bit to propagate from one router to the next. If the distance between the routers is increased, it will take longer time to propagate, that is, there would be more propagation delay. |
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| 44. |
What is the max data transfer rate of STP cables?(a) 10 Mbps(b) 100 Mbps(c) 1000 Mbps(d) 10000 Mbps |
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Answer» The correct answer is (b) 100 Mbps The best explanation: 100 Mbps is the max data transfer rate that can be handled by STP cables, and its default connector is RJ-45. 100 Mbps is a feasible data transfer rate for small networks like LANs. |
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| 45. |
Which connector does the STP cable use?(a) BNC(b) RJ-11(c) RJ-45(d) RJ-69 |
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Answer» Right answer is (c) RJ-45 For explanation: RJ-45 is used for STP cable. 100 Mbps is the max data transfer rate that can be handled by STP. RJ-45 is popularly used to connect to modern-day routers, computer network cards, and other network devices. |
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| 46. |
_____________ allows LAN users to share computer programs and data.(a) Communication server(b) Print server(c) File server(d) Network |
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Answer» The correct answer is (c) File server The explanation is: A file server allows LAN users to share computer programs and data. It uses the File Transfer Protocol to provide this feature on ports 20 and 21. The file server works as a medium for the transfer. |
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| 47. |
What is an input stream? |
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Answer» Input stream is a sequence of characters from any input device like a keyboard to the program of a computer. |
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| 48. |
With respect to physical media, STP cables stands for _________(a) Shielded Twisted Pair Cable(b) Spanning Tree Protocol Cable(c) Static Transport Protocol Cable(d) Shielded Two Power Cable |
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Answer» Correct answer is (a) Shielded Twisted Pair Cable The best explanation: For physical media, STP cable stands for Shielded twisted pair cable. 100 Mbps is the max data capacity of STP cable and its default connector is RJ45. It is popularly used in LANs due to its ease of maintenance and installation. |
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| 49. |
BER stands for ________(a) Basic Encoding Rules(b) Basic Encoding Resolver(c) Basic Encoding Rotator(d) Basic Encoding Router |
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Answer» Right option is (a) Basic Encoding Rules Easy explanation: The Basic Encoding Rules are a set of rules that specify the guidelines to encode the SNMP messages in binary form. Each SNMP message is encoded into 3 parts namely data, length and type of message. |
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| 50. |
To use a Simple Network Management System, we need _______(a) Servers(b) IP(c) Protocols(d) Rules |
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Answer» Correct option is (d) Rules Explanation: Rules are a collection of expression containing parameters to observe the attributes of the user’s device, and then execute some actions. It specifies the parameters for the managed objects inside the application and performs operations that would support the expression. The input of a rule may be many expressions or even a single expression that end in an output of single object invoking some action. |
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