McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Computer Science Engineering (CSE) , Electrical Engineering , Bachelor of Science in Computer Science TY (BSc CS) , Bachelor of Science in Information Technology FY (BSc IT) , Bachelor of Science in Information Technology SY (BSc IT) .
| 851. |
The process of keeping addresses in memory for future use is called |
| A. | Routing |
| B. | Resolving |
| C. | Caching |
| D. | None of the above |
| Answer» C. Caching | |
| 852. |
A small network making up the Internet and also having a small numbers of computers within it is called |
| A. | Host |
| B. | Address |
| C. | Subdomain |
| D. | None of the above |
| Answer» C. Subdomain | |
| 853. |
If a file consisting of 50,000 characters takes 40 seconds to send, then the data rate is . |
| A. | 1 kbps |
| B. | 1.25 kbps |
| C. | 2 kbps |
| D. | 10 kbps |
| Answer» D. 10 kbps | |
| 854. |
In CRC there is no error if the remainder at the receiver is . |
| A. | equal to the remainder at the sender |
| B. | zero |
| C. | nonzero |
| D. | the quotient at the sender |
| Answer» B. zero | |
| 855. |
Internet-like networks within an enterprise. |
| A. | Intranets |
| B. | Switching alternating |
| C. | Inter organizational networks |
| D. | Extranets |
| Answer» A. Intranets | |
| 856. |
Sending a file from your personal computer's primary memory or disk to another computer is called |
| A. | uploading |
| B. | downloading |
| C. | logging on |
| D. | hangs on |
| Answer» A. uploading | |
| 857. |
FDDI is a |
| A. | ring network |
| B. | star network |
| C. | mesh network |
| D. | bus based network |
| Answer» A. ring network | |
| 858. |
Which address is the loopback address? |
| A. | 0.0.0.1 |
| B. | 127.0.0.0 |
| C. | 127.0.0.1 |
| D. | 255.255.255.255 |
| Answer» C. 127.0.0.1 | |
| 859. |
A modulator converts a signal to a(n) signal. |
| A. | FSK; PSK |
| B. | PSK; FSK |
| C. | analog; digital |
| D. | digital; analog |
| Answer» C. analog; digital | |
| 860. |
The birthplace of the World Wide Web is considered to be |
| A. | the Department of Defence |
| B. | CERN |
| C. | ARPA |
| D. | Netscape |
| Answer» B. CERN | |
| 861. |
What is the port number for HTTP? |
| A. | 99 |
| B. | 86 |
| C. | 80 |
| D. | 23 |
| Answer» C. 80 | |
| 862. |
The communication mode that supports data in both directions at the same time is |
| A. | simplex |
| B. | half-duplex |
| C. | full-duplex |
| D. | multiplex |
| Answer» C. full-duplex | |
| 863. |
The basic Ethernet design does not provide |
| A. | access control |
| B. | addressing |
| C. | automatic retransmission of a message |
| D. | multiple virtual networks |
| Answer» C. automatic retransmission of a message | |
| 864. |
What does the acronym ISDN stand for? |
| A. | Indian Standard Digital Network |
| B. | Integrated Services Digital Network |
| C. | Intelligent Services Digital Network |
| D. | Integrated Services Data Network |
| Answer» B. Integrated Services Digital Network | |
| 865. |
ASK, PSK, FSK, and QAM are examples of encoding. |
| A. | digital-to-digital |
| B. | digital-to-analog |
| C. | analog-to-analog |
| D. | analog-to-digital |
| Answer» B. digital-to-analog | |
| 866. |
Who invented the modem? |
| A. | Wang Laboratories Ltd. |
| B. | AT & T Information Systems, USA |
| C. | Apple Computers Inc. |
| D. | Digital Equipment Corpn |
| Answer» B. AT & T Information Systems, USA | |
| 867. |
With an IP address of 201.142.23.12, what is your default subnetmask? |
| A. | 0.0.0.0 |
| B. | 255.0.0.0 |
| C. | 255.255.0.0 |
| D. | 255.255.255.0 |
| Answer» D. 255.255.255.0 | |
| 868. |
Which utility is an all-purpose tool for troubleshooting TCP/IP problems? |
| A. | NBTSTAT |
| B. | Netstat |
| C. | PING |
| D. | Hostname |
| Answer» C. PING | |
| 869. |
Which Layer is Responsible for Congestion Control? |
| A. | Network Layer |
| B. | Data link Layer |
| C. | Transport Layer |
| D. | Application layer |
| Answer» C. Transport Layer | |
| 870. |
Pure ALOHA has a maximum throughput of ----------- |
| A. | 16.4 % |
| B. | 18.4 % |
| C. | 7.4 % |
| D. | 1 % |
| Answer» B. 18.4 % | |
| 871. |
Which of these is a feature of hubs? |
| A. | Hubs amplifies the incoming signal. |
| B. | Hubs understand frames, packets or headers |
| C. | All lines coming into a Hub must operate at a same speed. |
| D. | all of these |
| Answer» C. All lines coming into a Hub must operate at a same speed. | |
| 872. |
DSL stands for |
| A. | data subscriber lines |
| B. | dual subscriber lines |
| C. | delay subscriber lines |
| D. | digital subscriber lines |
| Answer» D. digital subscriber lines | |
| 873. |
Which of the following is a MAC address? |
| A. | 192.166.200.50 |
| B. | 00056A:01A01A5CCA7FF60 |
| C. | 568, Airport Road |
| D. | 01:A5: BB: A7: FF: 60 |
| Answer» D. 01:A5: BB: A7: FF: 60 | |
| 874. |
The main difference between TCP and UDP is |
| A. | UDP is connection oriented whereas TCP is datagram service |
| B. | TCP is an Internet protocol whereas UDP is an ATM protocol |
| C. | UDP is a datagram whereas TCP is a connection oriented service |
| D. | All of the above |
| Answer» C. UDP is a datagram whereas TCP is a connection oriented service | |
| 875. |
What operates in the Data Link and the Network layer? |
| A. | NIC |
| B. | Bridge |
| C. | Brouter |
| D. | Router |
| Answer» C. Brouter | |
| 876. |
Which file transfer protocol uses UDP? |
| A. | NFS |
| B. | TELNET |
| C. | TFTP |
| D. | FTP |
| Answer» C. TFTP | |
| 877. |
Which of the following network access standard is used for connecting stations to a circuit-switched network? |
| A. | X.3 |
| B. | X.21 |
| C. | X.25 |
| D. | X.75 |
| Answer» B. X.21 | |
| 878. |
In OSI model, which of the following layer provides error-free delivery of data? |
| A. | Data link |
| B. | Network |
| C. | transport |
| D. | Session |
| Answer» C. transport | |
| 879. |
To avoid transmission errors, a check figure is calculated by the |
| A. | transmitting computer |
| B. | receiving computer |
| C. | both (a) and (b) |
| D. | Start and stop bit |
| Answer» C. both (a) and (b) | |
| 880. |
What is the first octet range for a class A IP address? |
| A. | 1 - 126 |
| B. | 192 - 255 |
| C. | 192 - 223 |
| D. | 1 - 127 |
| Answer» A. 1 - 126 | |
| 881. |
CSMA (Carrier Sense Multiple Access) is |
| A. | a method of determining which device has access to the transmission medium at any time |
| B. | a method access control technique for multiple-access transmission media. |
| C. | a very common bit-oriented data link protocol issued by ISO. |
| D. | network access standard for connecting stations to a circuit-switched network |
| Answer» B. a method access control technique for multiple-access transmission media. | |
| 882. |
What is the first octet range for a class B IP address? |
| A. | 128 - 255 |
| B. | 1 - 127 |
| C. | 192 - 223 |
| D. | 128 - 191 |
| Answer» D. 128 - 191 | |
| 883. |
ARP (Address Resolution Protocol) is |
| A. | a TCP/IP protocol used to dynamically bind a high level IP Address to a lowlevel physical hardware address |
| B. | a TCP/IP high level protocol for transferring files from one machine to another |
| C. | a protocol used to monitor computers |
| D. | a protocol that handles error and control messages |
| Answer» A. a TCP/IP protocol used to dynamically bind a high level IP Address to a lowlevel physical hardware address | |
| 884. |
The 802.5 standard implements a way for preventing collisions on the network. How are collisions prevented when using this standard? |
| A. | CSMA/CD |
| B. | Token passing |
| C. | Collision detection |
| D. | Time sharing |
| Answer» B. Token passing | |
| 885. |
Terminals are required for |
| A. | real time, batch processing, and timesharing |
| B. | real time, timesharing, and distributed processing |
| C. | real time, distributed processing, and manager inquiry |
| D. | real time, timesharing, and message switching |
| Answer» D. real time, timesharing, and message switching | |
| 886. |
What OSI layer handles logical address to logical name resolution? |
| A. | Transport |
| B. | Physical |
| C. | Presentation |
| D. | Data Link |
| Answer» A. Transport | |
| 887. |
Consider different activities related to email. m1:Send an email from a mail client to mail server m2:Download an email from mailbox server to a mail client m3:Checking email in a web browser Which is the applicable level protocol user in each activity? |
| A. | m1:HTTP, m2:SMTP, m3:POP |
| B. | m1:SMTP, m2:FTP, m3:HTTP |
| C. | m1:SMTP, m2:POP, m3:HTTP |
| D. | m1:POP, m2:SMTP, m3:IMAP |
| Answer» C. m1:SMTP, m2:POP, m3:HTTP | |
| 888. |
One of the header fields in an IP datagram is the Time to Live (TTL) field. Which of the following statements best explains the need for this field? |
| A. | It can be used to prioritize packets |
| B. | It can be used to reduce delays |
| C. | It can be used to optimize throughput |
| D. | It can be used to prevent packet looping |
| Answer» D. It can be used to prevent packet looping | |
| 889. |
Which of the following system calls results in the sending of SYNpackets? |
| A. | socket |
| B. | bind |
| C. | listen |
| D. | connect |
| Answer» D. connect | |
| 890. |
In the slow start phase of the TCP congestion control algorithm, the size of the congestion window |
| A. | does not increase |
| B. | increases linearly |
| C. | increases quadratically |
| D. | increases exponentially |
| Answer» D. increases exponentially | |
| 891. |
What is the maximum size of data that the application layer can pass on to the TCP layer below? |
| A. | Any size |
| B. | 2^16 bytes-size of TCP header |
| C. | 2^16 bytes |
| D. | 1500 bytes |
| Answer» A. Any size | |
| 892. |
A computer on a 10Mbps network is regulated by a token bucket. The token bucket is filled at a rate of 2Mbps. It is initially filled to capacity with 16Megabits. What is the maximum duration for which the computer can transmit at the full 10Mbps? |
| A. | 1.6 seconds |
| B. | 2 seconds |
| C. | 5 seconds |
| D. | 8 seconds |
| Answer» B. 2 seconds | |
| 893. |
In Ethernet when Manchester encoding is used, the bit rate is: |
| A. | Half the baud rate. |
| B. | Twice the baud rate. |
| C. | Same as the baud rate. |
| D. | none of the above |
| Answer» A. Half the baud rate. | |
| 894. |
Station A needs to send a message consisting of 9 packets to Station B using a sliding window (window size 3) and go-back-n error control strategy. All packets are ready and immediately available for transmission. If every 5th packet that A transmits gets lost (but no acks from B ever get lost), then what isthe number of packets that A will transmit for sending the message to B? |
| A. | 12 |
| B. | 14 |
| C. | 16 |
| D. | 18 |
| Answer» C. 16 | |
| 895. |
Determine the maximum length of the cable (in km) for transmitting data at a rate of 500 Mbps in an Ethernet LAN with frames of size 10,000 bits. Assume the signal speed in the cable to be 2,00,000 km/s. |
| A. | 1 |
| B. | 2 |
| C. | 2.5 |
| D. | 5 |
| Answer» B. 2 | |
| 896. |
Let G(x) be the generator polynomial used for CRC checking. What is the condition that should be satisfied by G(x) to detect odd number of bits in error? |
| A. | G(x) contains more than two terms |
| B. | G(x) does not divide 1+x^k, for any k not exceeding the frame length |
| C. | 1+x is a factor of G(x) |
| D. | G(x) has an odd number of terms. |
| Answer» C. 1+x is a factor of G(x) | |
| 897. |
In serial data transmission, every byte of data is padded with a ‘0’ in the beginning and one or two ‘1’ s at the end of byte because |
| A. | Receiver is to be synchronized for byte reception |
| B. | Receiver recovers lost ‘0’ and ‘1’s from these padded bits |
| C. | Padded bits are useful in parity computation |
| D. | None of these |
| Answer» A. Receiver is to be synchronized for byte reception | |
| 898. |
Which one of the following statements is FALSE? |
| A. | Packet switching leads to better utilization of bandwidth resources than circuit switching. |
| B. | Packet switching results in less variation in delay than circuitswitching. |
| C. | Packet switching requires more per packet processing than circuitswitching |
| D. | Packet switching can lead to reordering unlike in circuitswitching |
| Answer» B. Packet switching results in less variation in delay than circuitswitching. | |
| 899. |
Which of the following statements is FALSE regarding a bridge? |
| A. | Bridge is a layer 2 device |
| B. | Bridge reduces collision domain |
| C. | Bridge is used to connect two or more LAN segments |
| D. | Bridge reduces broadcast domain |
| Answer» D. Bridge reduces broadcast domain | |
| 900. |
In a packet switching network, if the message size is 48 bytes and each packet contains a header of 3 bytes. If 24 packets are required to transmit the message, the packet size is . |
| A. | 2 bytes |
| B. | 1 bytes |
| C. | 4 bytes |
| D. | 5 bytes |
| Answer» D. 5 bytes | |
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