McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Electronics and Telecommunication Engineering [ENTC] .
| 251. |
Which of the following is not the job of IEEE 802.15.4 MAC standard |
| A. | channel acquisition |
| B. | data transparency |
| C. | nic address |
| D. | error correction |
| Answer» B. data transparency | |
| 252. |
Which of the following is the job of IEEE 802.15.4 PHY standard |
| A. | channel acquisition |
| B. | contention management |
| C. | power management |
| D. | error correction |
| Answer» C. power management | |
| 253. |
Size of guard band is larges in case of ____________ |
| A. | 2.4ghz ism band |
| B. | 915mhz ism band |
| C. | european 868mhz band. |
| D. | same in all cases |
| Answer» A. 2.4ghz ism band | |
| 254. |
Following device class is able to be a Network coordinator |
| A. | full function device (ffd) |
| B. | reduced function device (rfd) |
| C. | both are capable |
| D. | any of them can not be |
| Answer» A. full function device (ffd) | |
| 255. |
Following device class is able to talk to any other device |
| A. | full function device (ffd) |
| B. | reduced function device (rfd) |
| C. | both are capable |
| D. | none of above |
| Answer» A. full function device (ffd) | |
| 256. |
Select correct statement about Full function device (FFD) |
| A. | limited to star topology |
| B. | cannot become a network coordinator |
| C. | talks only to a network coordinator |
| D. | can be used in star, tree and mesh topology |
| Answer» D. can be used in star, tree and mesh topology | |
| 257. |
Select correct statement about Reduced function device (RFD) |
| A. | can be used in tree topology |
| B. | talks to network coordinator only |
| C. | talks to any other device |
| D. | capable to be a network coordinator |
| Answer» B. talks to network coordinator only | |
| 258. |
Device class of Full function device (FFD) is used in |
| A. | star topology only |
| B. | tree topology only |
| C. | mesh topology only |
| D. | any of the above topology |
| Answer» D. any of the above topology | |
| 259. |
_________ MAC frame serve to announce the presence of a wireless LAN and to synchronize the members of the service set. |
| A. | data frame |
| B. | beacon frame |
| C. | acknowledgment frame |
| D. | mac command frame |
| Answer» B. beacon frame | |
| 260. |
_________ MAC frame serve as the control frame. |
| A. | data frame |
| B. | beacon frame |
| C. | acknowledgment frame |
| D. | mac command frame |
| Answer» C. acknowledgment frame | |
| 261. |
_________ MAC frame is also called as Management frame. |
| A. | data frame |
| B. | beacon frame |
| C. | acknowledgment frame |
| D. | mac command frame |
| Answer» D. mac command frame | |
| 262. |
In 802.15.4 standard Beacon frames are transmitted by coordinator |
| A. | at the start |
| B. | periodically |
| C. | randomly |
| D. | when new device detected |
| Answer» B. periodically | |
| 263. |
The date available from sensor node is of type |
| A. | periodic data |
| B. | intermittent data |
| C. | repetitive low latency data |
| D. | a and b both |
| Answer» A. periodic data | |
| 264. |
Select incorrect statement about ZigBee standard. |
| A. | zigbee is a low-power, low data rate |
| B. | zigbee is a low data rate, and close proximity |
| C. | less expensive than other wpans |
| D. | limits transmission distances to 1–10 km beyond line of sight, |
| Answer» D. limits transmission distances to 1–10 km beyond line of sight, | |
| 265. |
Select correct statement. |
| A. | zigbee standard is a low-power, high data rate |
| B. | zigbee standard s a low data rate, and wide area coverage |
| C. | zigbee is most expensive than other wpans |
| D. | zigbee limits transmission distances to 10–100 meters, in line of sight, |
| Answer» D. zigbee limits transmission distances to 10–100 meters, in line of sight, | |
| 266. |
Following is not the function of ZigBee used with IEEE 802.15.4 standard |
| A. | network routing |
| B. | address translation |
| C. | channel acquisition |
| D. | packet segmentation |
| Answer» C. channel acquisition | |
| 267. |
Number of nodes possible with ZigBee network are |
| A. | 10 |
| B. | 100 |
| C. | 1024 |
| D. | 64000 |
| Answer» D. 64000 | |
| 268. |
Date rate of 250 kbps is maximum for ________ technology. |
| A. | bluetooth |
| B. | zigbee |
| C. | ieee 802.11 |
| D. | a and b both |
| Answer» B. zigbee | |
| 269. |
Life of ZigBee devices w.r.t. power consumption is in ________ |
| A. | hours |
| B. | days |
| C. | years |
| D. | 4 weeks |
| Answer» C. years | |
| 270. |
Range of ZigBee standard devices is |
| A. | 1- 10 meters |
| B. | 50- 100 meters |
| C. | cms to 1 meter |
| D. | 100-500 meters |
| Answer» B. 50- 100 meters | |
| 271. |
Low data rate standard used for WPAN is |
| A. | ieee 802.15.1 |
| B. | ieee 802.15.4 |
| C. | ieee 802.15.3 |
| D. | ieee 802.11 |
| Answer» B. ieee 802.15.4 | |
| 272. |
High data rate standard used for WPAN is |
| A. | ieee 802.15.1 |
| B. | ieee 802.15.4 |
| C. | ieee 802.15.3 |
| D. | ieee 802.11 |
| Answer» C. ieee 802.15.3 | |
| 273. |
ZigBee 915 MHz ISM band has data rate of |
| A. | 20kbps |
| B. | 40kbps |
| C. | 250bps |
| D. | all of above |
| Answer» B. 40kbps | |
| 274. |
ZigBee 868 MHz band has data rate of |
| A. | 20kbps |
| B. | 40kbps |
| C. | 250bps |
| D. | all of above |
| Answer» C. 250bps | |
| 275. |
ZigBee 2.4GHz ISM band has data rate of |
| A. | 20kbps |
| B. | 40kbps |
| C. | 250bps |
| D. | all of above |
| Answer» A. 20kbps | |
| 276. |
Following layer of ZigBee is shared FOR alliance with IEEE 802.15.4 |
| A. | network layer |
| B. | data link layer |
| C. | application layer |
| D. | mac layer |
| Answer» D. mac layer | |
| 277. |
Function of MAC layer in ZigBee alliance is |
| A. | modulation and demodulation |
| B. | transmits the beacon frames |
| C. | end device connection and disconnection |
| D. | network setup |
| Answer» B. transmits the beacon frames | |
| 278. |
Type of ZigBee participate in multi-hop routing of message is |
| A. | zigbee coordinator |
| B. | zigbee router |
| C. | zigbee end device |
| D. | a and b both |
| Answer» D. a and b both | |
| 279. |
Wireless Technology having bandwidth of 1 Mbps is |
| A. | zigbee |
| B. | wi-fi |
| C. | bluetooth |
| D. | none of above |
| Answer» C. bluetooth | |
| 280. |
Wireless Technology having bandwidth of 250 Kbps is |
| A. | zigbee |
| B. | wi-fi |
| C. | bluetooth |
| D. | none of above |
| Answer» A. zigbee | |
| 281. |
Wireless Technology having bandwidth of up to 54 Mbps is |
| A. | zigbee |
| B. | wi-fi |
| C. | bluetooth |
| D. | none of above |
| Answer» B. wi-fi | |
| 282. |
WirelessHART is stands for |
| A. | high area remote transducer protocol |
| B. | highway area remote transducer protocol |
| C. | highway addressable remote transducer protocol |
| D. | higher address remote transfer protocol |
| Answer» C. highway addressable remote transducer protocol | |
| 283. |
Wireless HART is based on |
| A. | ieee 802.15.3-2006, 2.4ghz ism band |
| B. | ieee 802.15.4-2006, 2.4ghz ism band |
| C. | ieee 802.15.4-2006, 915 mhz ism band |
| D. | ieee 802.15.3-2006, 915 mhz ism band |
| Answer» B. ieee 802.15.4-2006, 2.4ghz ism band | |
| 284. |
ISA100.11a is a wireless networking technology standard where ISA stands for |
| A. | international security addressing |
| B. | international society of addressing |
| C. | international society of automation |
| D. | international security for automation |
| Answer» C. international society of automation | |
| 285. |
ISA100.11a protocol stack includes following layers: |
| A. | physical layer, data link layer, network layer and transport layer. |
| B. | physical layer, data link layer, network layer, transport layer and application layer. |
| C. | data link layer, network layer, transport layer and application layer. |
| D. | physical layer, data link layer, network layer and application layer. |
| Answer» B. physical layer, data link layer, network layer, transport layer and application layer. | |
| 286. |
_________ provides IP communication capability to nodes in WSN. |
| A. | isa100.11a |
| B. | zigbee |
| C. | 6lowpan |
| D. | bluetooth |
| Answer» C. 6lowpan | |
| 287. |
Standard to be used for virtual wireless multimedia connectivity is |
| A. | ieee 802.15.4 and zigbee alliance |
| B. | ieee 802.15.3 |
| C. | ieee 802.15.1 with bluetooth |
| D. | none of above |
| Answer» B. ieee 802.15.3 | |
| 288. |
Feature of IEEE 802.15.3 is |
| A. | low data rate and low power |
| B. | high data rate and high power |
| C. | high data rate and low power |
| D. | low data rate and high power |
| Answer» C. high data rate and low power | |
| 289. |
FSK modulation technique is used in ______- standard. |
| A. | wavenis |
| B. | insteon |
| C. | zigbee |
| D. | bluetooth |
| Answer» B. insteon | |
| 290. |
IEEE 802.15.4 ANT presents a data rate of |
| A. | 10 kbit/sec |
| B. | 100 kbit/sec |
| C. | 1 mbit/sec |
| D. | 250 kbit/sec |
| Answer» C. 1 mbit/sec | |
| 291. |
The objective of the cross-layer protocol in WSN is |
| A. | highly reliable communication with minimal energy consumption |
| B. | adaptive communication decisions |
| C. | local congestion avoidance. |
| D. | all of the bove |
| Answer» D. all of the bove | |
| 292. |
A Z-Wave network can consist of ____________ nodes to the max. |
| A. | 121 |
| B. | 232 |
| C. | 10 |
| D. | 64 |
| Answer» B. 232 | |
| 293. |
The Z-Wave Network is of the ______ architecture |
| A. | star |
| B. | tree |
| C. | mesh |
| D. | peer to peer |
| Answer» C. mesh | |
| 294. |
In case of Z wave network, ______ node has complete map and calculate routes |
| A. | routing slaves |
| B. | controllers |
| C. | slaves |
| D. | a and b both |
| Answer» B. controllers | |
| 295. |
In case of Z wave network, ______ node can act as repeater. |
| A. | routing slaves |
| B. | controllers |
| C. | slaves |
| D. | a and b both |
| Answer» D. a and b both | |
| 296. |
Z-Wave uses a ______ bit identifier |
| A. | 16 |
| B. | 8 |
| C. | 32 |
| D. | 24 |
| Answer» C. 32 | |
| 297. |
Wireless HART communication protocol able to work on distances up to ____________ |
| A. | 100 m |
| B. | 1500 m |
| C. | 50 m |
| D. | 500 m |
| Answer» B. 1500 m | |
| 298. |
Wibree Nokia’s short-range wireless connection which is similar and compatible to Bluetooth is |
| A. | equally energy efficient as bluetooth |
| B. | less energy efficient than bluetooth |
| C. | more energy efficient than bluetooth |
| D. | cannot relate energy efficiency |
| Answer» C. more energy efficient than bluetooth | |
| 299. |
At the physical layer, contribute to energy loss in a wireless transmission, the loss is |
| A. | due to the channel and the fixed energy cost |
| B. | due to run of the transmission and reception circuitry |
| C. | both |
| D. | neither a nor b |
| Answer» C. both | |
| 300. |
As the energy used in transmission ___________, the probability of error ___________, and the number of retransmissions _________. |
| A. | increases, decreases, increases |
| B. | decreases, decreases, increases |
| C. | decreases, decreases, decreases |
| D. | increases, decreases, decreases |
| Answer» D. increases, decreases, decreases | |
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