McqMate
| 1. |
A video consists of a sequence of |
| A. | frames. |
| B. | signals. |
| C. | packets. |
| D. | slots. |
| Answer» A. frames. | |
| 2. |
If frames are displayed on screen fast enough, we get an impression of |
| A. | signals. |
| B. | motions. |
| C. | packets. |
| D. | bits. |
| Answer» B. motions. | |
| 3. |
H.323 uses G.71 or G.723.1 for |
| A. | compression. |
| B. | communication. |
| C. | controlling. |
| D. | conferencing. |
| Answer» A. compression. | |
| 4. |
To receive signal, a translator is needed to decode signal and encode it again at a |
| A. | high quality. |
| B. | lower quality. |
| C. | same quality. |
| D. | bad quality. |
| Answer» B. lower quality. | |
| 5. |
Session Initiation Protocol (SIP), is very |
| A. | independent. |
| B. | flexible. |
| C. | important. |
| D. | layered. |
| Answer» B. flexible. | |
| 6. |
In Audio and Video Compression, each frame is divided into small grids, called picture elements or |
| A. | frame. |
| B. | packets. |
| C. | pixels. |
| D. | mega pixels. |
| Answer» C. pixels. | |
| 7. |
Streaming stored audio/video, files are compressed and stored on a |
| A. | ip. |
| B. | server. |
| C. | domain. |
| D. | internet. |
| Answer» B. server. | |
| 8. |
Live streaming is still using Transmission Control Protocol ( TCP), and multiple unicasting instead of |
| A. | unicasting. |
| B. | multicasting. |
| C. | layered control. |
| D. | protocol control. |
| Answer» B. multicasting. | |
| 9. |
Moving Picture Experts Group (MPEG-2), was designed for high-quality DVD with a data rate of |
| A. | 3 to 6 mbps. |
| B. | 4 to 6 mbps. |
| C. | 5 to 6 mbps. |
| D. | 6 to 6 mbps. |
| Answer» A. 3 to 6 mbps. | |
| 10. |
Joint Photographic Experts Group (JPEG) is used to compress |
| A. | music. |
| B. | pictures. |
| C. | images. |
| D. | frames. |
| Answer» C. images. | |
| 11. |
Real-time traffic needs support of |
| A. | unicasting. |
| B. | multicasting. |
| C. | layered control. |
| D. | protocol control. |
| Answer» B. multicasting. | |
| 12. |
We can divide audio and video services into |
| A. | 1 broad categories. |
| B. | 2 broad categories. |
| C. | 3 broad categories. |
| D. | 4 broad categories. |
| Answer» C. 3 broad categories. | |
| 13. |
In Video Compression, an independent frame that is not related to any other frame is called |
| A. | b-frame. |
| B. | c-frame. |
| C. | i-frame. |
| D. | p-frame. |
| Answer» C. i-frame. | |
| 14. |
. RTP uses a temporary even-numbered |
| A. | rtcp. |
| B. | smtp. |
| C. | udp port. |
| D. | none. |
| Answer» C. udp port. | |
| 15. |
HTTP client accesses Web server by using the |
| A. | send message. |
| B. | get message. |
| C. | auto receive message. |
| D. | none. |
| Answer» B. get message. | |
| 16. |
In Joint Photographic Experts Group (JPEG), a gray scale picture is divided into blocks of |
| A. | 5 x 5 pixels. |
| B. | 6 x 6 pixels. |
| C. | 7 x 7 pixels. |
| D. | 8 x 8 pixels. |
| Answer» D. 8 x 8 pixels. | |
| 17. |
MP3 produces three data rates from 96 Kbps to |
| A. | 128 kbps. |
| B. | 164 kbps. |
| C. | 256 kbps. |
| D. | 320 kbps. |
| Answer» B. 164 kbps. | |
| 18. |
For Music, we need to compress digitize signals at |
| A. | 1.41 i-mhz. |
| B. | 1.42 i-mhz. |
| C. | 1.45 i-mhz. |
| D. | 1.48 i-mhz. |
| Answer» A. 1.41 i-mhz. | |
| 19. |
Sometimes real-time traffic needs |
| A. | organization. |
| B. | traffic. |
| C. | channelizing. |
| D. | translation. |
| Answer» D. translation. | |
| 20. |
In Real-Time Transport Protocol (RTP), source periodically sends a source description message to give additional infonnation about |
| A. | others. |
| B. | itself. |
| C. | protocols. |
| D. | packets. |
| Answer» B. itself. | |
| 21. |
Audio compression can be used for |
| A. | speech or music. |
| B. | voice and data. |
| C. | picture and colors. |
| D. | video and voice. |
| Answer» A. speech or music. | |
| 22. |
In Real Time Interactive Audio Video, conferencing requires two way communication between |
| A. | receivers and senders. |
| B. | packet to frames. |
| C. | pixels to packets. |
| D. | frames to pixels. |
| Answer» A. receivers and senders. | |
| 23. |
In Real Time Interactive Audio Video, Jitter is introduced in real-time data by delay between |
| A. | frames. |
| B. | layers. |
| C. | pixels. |
| D. | packets. |
| Answer» D. packets. | |
| 24. |
Session Initiation Protocol (SIP), has a mechanism that finds the |
| A. | domain. |
| B. | way. |
| C. | ip address. |
| D. | terminal. |
| Answer» C. ip address. | |
| 25. |
In Audio and Video Compression, voice is sampled at 8000 samples per second with |
| A. | 5 bits per sample. |
| B. | 6 bits per sample. |
| C. | 7 bits per sample. |
| D. | 8 bits per sample. |
| Answer» D. 8 bits per sample. | |
| 26. |
In Voice Over IP, Term SIP stands for |
| A. | session initiation protocol. |
| B. | session initiation port. |
| C. | session initiation path. |
| D. | session initiation packet. |
| Answer» A. session initiation protocol. | |
| 27. |
In Real-Time Transport Protocol (RTP), A source sends a bye message to shut down a |
| A. | system. |
| B. | frames. |
| C. | ip. |
| D. | stream. |
| Answer» D. stream. | |
| 28. |
In Audio and Video Compression, term RBG expresses |
| A. | red, blue, green. |
| B. | red, black, grey. |
| C. | rate, bit, giga bit. |
| D. | red, bluish, greyish. |
| Answer» A. red, blue, green. | |
| 29. |
To perform tracking of an IP, Session Initiation Protocol (SIP), uses concept of |
| A. | registration. |
| B. | termination. |
| C. | streaming. |
| D. | translation. |
| Answer» A. registration. | |
| 30. |
A simple session using Session Initiation Protocol (SIP), consists of three modules: establishing, communicating, and |
| A. | transmission. |
| B. | system. |
| C. | streaming. |
| D. | terminating. |
| Answer» D. terminating. | |
| 31. |
Real-time traffic needs support of |
| A. | multicasting. |
| B. | translation. |
| C. | integration. |
| D. | security. |
| Answer» A. multicasting. | |
| 32. |
Session Initiation Protocol (SIP), is designed to be independent of underlying |
| A. | linear layer. |
| B. | lower layer. |
| C. | transport layer. |
| D. | protocol layer. |
| Answer» C. transport layer. | |
| 33. |
In Real Time Interactive Audio Video, data are stored in buffer at a possibly variable |
| A. | pixels. |
| B. | packets. |
| C. | rates. |
| D. | bytes. |
| Answer» C. rates. | |
| 34. |
In Real Time Interactive Audio Video, to prevent jitter, we can time-stamp packets and separate arrival time from the |
| A. | frame time. |
| B. | playback time. |
| C. | pixels time. |
| D. | packet time. |
| Answer» B. playback time. | |
| 35. |
Real-time Transport Protocol (RTP) is protocol designed to handle real-time traffic on the |
| A. | frames. |
| B. | internet. |
| C. | ip. |
| D. | protocol. |
| Answer» B. internet. | |
| 36. |
In Session Initiation Protocol (SIP), session can be terminated with a |
| A. | ok message. |
| B. | bye message. |
| C. | terminate message. |
| D. | quit message. |
| Answer» B. bye message. | |
| 37. |
RTCP stands for |
| A. | real-time transport control program. |
| B. | real-time transport control packet. |
| C. | real-time transport control protocol. |
| D. | real-time transport control path. |
| Answer» C. real-time transport control protocol. | |
| 38. |
A compressed audio/video file can be downloaded as a |
| A. | image. |
| B. | video. |
| C. | frame. |
| D. | text file. |
| Answer» D. text file. | |
| 39. |
When a caller needs to communicate with callee, caller can use e-mail address instead of IP address in the |
| A. | ok message. |
| B. | bye message. |
| C. | invite message. |
| D. | great message. |
| Answer» C. invite message. | |
| 40. |
In Real Time Interactive Audio Video, a sequence number on each packet is required for |
| A. | real-time traffic. |
| B. | real-time playback. |
| C. | real-time pixels. |
| D. | real-time frames. |
| Answer» A. real-time traffic. | |
| 41. |
Before audio or video signals can be sent on Internet, they need to be |
| A. | channelized. |
| B. | managed. |
| C. | digitized. |
| D. | organized. |
| Answer» C. digitized. | |
| 42. |
For speech, we need to compress digitize signals at |
| A. | 128 khz. |
| B. | 256 khz. |
| C. | 64 khz. |
| D. | 1152 khz. |
| Answer» C. 64 khz. | |
| 43. |
Moving Picture Experts Group (MPEG-1), was designed for a |
| A. | pc. |
| B. | cd. |
| C. | dvd. |
| D. | floppy. |
| Answer» B. cd. | |
| 44. |
Perceptual encoding is based on science of |
| A. | frames. |
| B. | music. |
| C. | rhythm. |
| D. | psychoacoustics. |
| Answer» D. psychoacoustics. | |
| 45. |
Media player uses URL in metafile to access media server to |
| A. | download file. |
| B. | upload file. |
| C. | stored the file. |
| D. | stream file. |
| Answer» A. download file. | |
| 46. |
In Real Time Interactive Audio Video, mixing means combining several streams of traffic into |
| A. | 1 stream. |
| B. | 2 stream. |
| C. | 3 stream. |
| D. | 4 stream. |
| Answer» A. 1 stream. | |
| 47. |
According to Nyquist theorem, if highest frequency of signal is f, we need to sample signal |
| A. | 19 times/sed. |
| B. | 20 times/sed. |
| C. | 21 times/sed. |
| D. | 22 times/sed. |
| Answer» C. 21 times/sed. | |
| 48. |
In temporal compression, redundant frames are |
| A. | channelized. |
| B. | organized. |
| C. | digitized. |
| D. | removed. |
| Answer» D. removed. | |
| 49. |
Primary Colors for Color TV are |
| A. | blue, white, black. |
| B. | red, green, yellow. |
| C. | red, green, black. |
| D. | red, green, blue. |
| Answer» D. red, green, blue. | |
| 50. |
Multilevel Amplitude Shift Keying (MASK) is not implemented with pure Amplitude Shift Keying (ASK), it is implemented with |
| A. | qam. |
| B. | psk. |
| C. | fsk. |
| D. | binary ask. |
| Answer» A. qam. | |
| 51. |
In a constellation diagram, a signal element type is represented as a |
| A. | dot. |
| B. | line. |
| C. | x component. |
| D. | y component. |
| Answer» A. dot. | |
| 52. |
Term that refers to phase continues through boundary of two signal elements is |
| A. | non coherent bfsk. |
| B. | coherent bfsk. |
| C. | binary ask. |
| D. | multilevel ask. |
| Answer» B. coherent bfsk. | |
| 53. |
Example of an analog to analog conversion is |
| A. | radio. |
| B. | video. |
| C. | television. |
| D. | internet. |
| Answer» A. radio. | |
| 54. |
Total bandwidth required for Amplitude Modulation (AM) is |
| A. | 2 |
| B. | 2(1 + ? )b.. |
| C. | 2l. |
| D. | 2f. |
| Answer» A. 2 | |
| 55. |
AM stations are allowed carrier frequencies anywhere between |
| A. | 5-10khz. |
| B. | 50-100khz. |
| C. | 250-1000khz. |
| D. | 530- 1700 khz. |
| Answer» D. 530- 1700 khz. | |
| 56. |
Analog-to-analog conversion can be accomplished in |
| A. | one way. |
| B. | three ways. |
| C. | two ways. |
| D. | four ways. |
| Answer» B. three ways. | |
| 57. |
Term that is used to compose matrix of pixel is |
| A. | number. |
| B. | image. |
| C. | video. |
| D. | audio. |
| Answer» B. image. | |
| 58. |
Parameter that refers to recording and broadcasting of picture is |
| A. | text. |
| B. | audio. |
| C. | image. |
| D. | video. |
| Answer» D. video. | |
| 59. |
Both station can transmit and receive data simultaneously in |
| A. | simplex mode. |
| B. | half duplex mode. |
| C. | full duplex mode. |
| D. | none of above. |
| Answer» C. full duplex mode. | |
| 60. |
Each set of bit pattern is called |
| A. | code. |
| B. | unicode. |
| C. | coding. |
| D. | ascii. |
| Answer» A. code. | |
| 61. |
Data communications are transfer of data through some |
| A. | transmission medium. |
| B. | linear medium. |
| C. | network lan. |
| D. | protocols. |
| Answer» A. transmission medium. | |
| 62. |
When system delivers data accurately then it is called |
| A. | accuracy. |
| B. | delivery. |
| C. | jitter. |
| D. | timelessness. |
| Answer» B. delivery. | |
| 63. |
Mode that is like a two way street with traffic flowing in both direction simultaneously is |
| A. | simplex. |
| B. | full duplex. |
| C. | half duplex. |
| D. | none of above. |
| Answer» B. full duplex. | |
| 64. |
Agreement between communicating devices are called |
| A. | none of the mentioned |
| B. | message. |
| C. | protocol. |
| D. | transmission medium. |
| Answer» C. protocol. | |
| 65. |
Five components that make up a data communications system are message, sender, receiver, and |
| A. | protocol. |
| B. | medium. |
| C. | connecting device. |
| D. | both a and b. |
| Answer» D. both a and b. | |
| 66. |
Two computers connected by an Ethernet hub are of |
| A. | lan topology. |
| B. | man topology. |
| C. | wan topology. |
| D. | intranet. |
| Answer» A. lan topology. | |
| 67. |
How many bits in data unit has changed in single bit error |
| A. | only 1. |
| B. | two bits. |
| C. | three bits. |
| D. | four bits. |
| Answer» A. only 1. | |
| 68. |
To guarantee detection of up to s errors in all cases, minimum hamming distance in a block code must be |
| A. | s. |
| B. | s+1. |
| C. | s-1. |
| D. | 0. |
| Answer» B. s+1. | |
| 69. |
Cyclic codes are fast when these are implemented in |
| A. | software. |
| B. | hardware. |
| C. | local area network. |
| D. | wide area network. |
| Answer» B. hardware. | |
| 70. |
In block coding, we divide our message into blocks, is called |
| A. | code blocks. |
| B. | packet blocks. |
| C. | code words. |
| D. | datawords. |
| Answer» D. datawords. | |
| 71. |
Find parity bit for 1001011 |
| A. | 0. |
| B. | 1. |
| C. | 2. |
| D. | none. |
| Answer» A. 0. | |
| 72. |
In a cyclic code, decoder is failed to detect any error, when syndrome is |
| A. | zero. |
| B. | non zero. |
| C. | infinity. |
| D. | negative value. |
| Answer» A. zero. | |
| 73. |
What is maximum effect of a 2-ms burst of noise on data transmitted for 12 kbps |
| A. | 2 bits. |
| B. | 4 bits. |
| C. | 16 bits. |
| D. | 24 bits. |
| Answer» D. 24 bits. | |
| 74. |
Divisor line and XOR are missing if corresponding bit in divisor is |
| A. | 0. |
| B. | 1. |
| C. | 10. |
| D. | 11. |
| Answer» A. 0. | |
| 75. |
Unsigned representation of numbers by one's complement can represent |
| A. | positive number. |
| B. | negative number. |
| C. | positive and negative numbers. |
| D. | infinite numbers. |
| Answer» C. positive and negative numbers. | |
| 76. |
Checksum is used in Internet by several protocols although not at the |
| A. | session layer. |
| B. | transport layer. |
| C. | network layer. |
| D. | data link layer. |
| Answer» D. data link layer. | |
| 77. |
Switching in Internets done by using datagram approach to packet switching at the |
| A. | network layer. |
| B. | application layer. |
| C. | data link layer. |
| D. | physical layer.. |
| Answer» A. network layer. | |
| 78. |
A Circuit-Switched Network is made of a set of switches connected by physical |
| A. | links. |
| B. | media. |
| C. | nodes. |
| D. | frames. |
| Answer» A. links. | |
| 79. |
Iog28 = |
| A. | 0. |
| B. | 1. |
| C. | 2. |
| D. | 3. |
| Answer» D. 3. | |
| 80. |
A switch in a datagram network uses a |
| A. | destination address. |
| B. | sender address. |
| C. | routing table. |
| D. | header. |
| Answer» C. routing table. | |
| 81. |
Routing processor searches routing table is called |
| A. | switch fabric. |
| B. | buffer. |
| C. | table lookup. |
| D. | rolling table. |
| Answer» C. table lookup. | |
| 82. |
A Virtual-Circuit Network (VCN) is normally implemented in the |
| A. | session layer. |
| B. | data link layer. |
| C. | network layer. |
| D. | physical layer. |
| Answer» B. data link layer. | |
| 83. |
Which frame completes entries in switching tables |
| A. | acknowledgment frame. |
| B. | setup frame. |
| C. | routing frame. |
| D. | none. |
| Answer» A. acknowledgment frame. | |
| 84. |
Virtual-Circuit Networks and datagram networks are sub categories of |
| A. | message-switched networks. |
| B. | packet-switched networks. |
| C. | circuit-switched networks. |
| D. | none of them. |
| Answer» B. packet-switched networks. | |
| 85. |
Actual communication in a circuit-switched network requires |
| A. | one phase. |
| B. | two phases. |
| C. | three phases. |
| D. | four phases. |
| Answer» C. three phases. | |
| 86. |
In a packet-switched network, resources are allocated |
| A. | randomly. |
| B. | on demand. |
| C. | reserved already. |
| D. | both a and c. |
| Answer» B. on demand. | |
| 87. |
In Circuit Switching, resources need to be reserved during the |
| A. | data transfer phase. |
| B. | teardown phase.. |
| C. | setup phase. |
| D. | propagation phase. |
| Answer» C. setup phase. | |
| 88. |
Circuit Switched Networks are used in |
| A. | cellular network. |
| B. | satellite network. |
| C. | cable network. |
| D. | telephone network. |
| Answer» D. telephone network. | |
| 89. |
Term that performs physical and data link functions of packet switch is called |
| A. | input port. |
| B. | output port. |
| C. | routing processor. |
| D. | switching fabric. |
| Answer» A. input port. | |
| 90. |
Circuit-Switched Networks are not as efficient as other two types of networks because resources are unavailable to |
| A. | other connections. |
| B. | same connections. |
| C. | other switches. |
| D. | other networks. |
| Answer» A. other connections. | |
| 91. |
Asynchronous Transfer Mode (ATM) network is an example of |
| A. | packet switching network. |
| B. | datagram networks. |
| C. | virtual circuit network. |
| D. | message switched network. |
| Answer» C. virtual circuit network. | |
| 92. |
Three methods of switching are |
| A. | circuit switching, packet switching, and protocol switching. |
| B. | circuit switching, packet switching, and message switching. |
| C. | loop switching, packet switching, and message switching. |
| D. | node switching, packet switching, and message switching. |
| Answer» B. circuit switching, packet switching, and message switching. | |
| 93. |
A circuit-switched network is made of switches connected by physical links, in which each link is divided into |
| A. | n channels. |
| B. | n+1 channels. |
| C. | 2n channels. |
| D. | n-1 channels. |
| Answer» A. n channels. | |
| 94. |
A switched network consists of a series of interlinked nodes is called |
| A. | frames. |
| B. | packets. |
| C. | switches. |
| D. | links. |
| Answer» C. switches. | |
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