MCQOPTIONS
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MCQOPTIONS
This section includes 389 Mcqs, each offering curated multiple-choice questions to sharpen your Electronics and Telecommunication Engineering [ENT knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Number of nodes possible with ZigBee network are |
| A. | 10 |
| B. | 100 |
| C. | 1024 |
| D. | 64000 |
| Answer» E. | |
| 152. |
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» D. packet segmentation | |
| 153. |
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» E. | |
| 154. |
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» E. | |
| 155. |
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» B. intermittent data | |
| 156. |
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» C. randomly | |
| 157. |
_________ MAC frame serve as the control frame. |
| A. | data frame |
| B. | beacon frame |
| C. | acknowledgment frame |
| D. | mac command frame |
| Answer» D. mac command frame | |
| 158. |
_________ 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» C. acknowledgment frame | |
| 159. |
_________ MAC frame is also called as Management frame. |
| A. | data frame |
| B. | beacon frame |
| C. | acknowledgment frame |
| D. | mac command frame |
| Answer» E. | |
| 160. |
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» E. | |
| 161. |
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» C. talks to any other device | |
| 162. |
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» B. reduced function device (rfd) | |
| 163. |
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» B. reduced function device (rfd) | |
| 164. |
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» E. | |
| 165. |
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» B. 915mhz ism band | |
| 166. |
Which of the following is not the job of IEEE 802.15.4 PHY standard |
| A. | packet generation |
| B. | packet reception |
| C. | channel acquisition |
| D. | power management |
| Answer» D. power management | |
| 167. |
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» D. error correction | |
| 168. |
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» C. nic address | |
| 169. |
IEEE 802.15.4 standard has ______ channels are in the 2.4GHz ISM band. |
| A. | 8 |
| B. | 12 |
| C. | 16 |
| D. | 32 |
| Answer» D. 32 | |
| 170. |
IEEE 802.15.4 standard has ______ channels are in European 868MHz band. |
| A. | 1 |
| B. | 2 |
| C. | 4 |
| D. | 8 |
| Answer» B. 2 | |
| 171. |
IEEE 802.15.4 standard has ______ channels are in the 915MHz ISM band. |
| A. | 1 |
| B. | 10 |
| C. | 16 |
| D. | 24 |
| Answer» C. 16 | |
| 172. |
Protocol used for high data rate WPAN is |
| A. | ieee 802.15.1 standard |
| B. | ieee 802.15.2 standard |
| C. | ieee 802.15.3 standard |
| D. | ieee 802.15.4 standard |
| Answer» D. ieee 802.15.4 standard | |
| 173. |
IEEE 802.15.4 standard has data rate of |
| A. | 20 kb/s, 40kb/s, 250kb/s |
| B. | 20 kb/s, 40kb/s, 80kb/s |
| C. | 20 kb/s, 80kb/s, 200kbs |
| D. | 40 kb/s, 80kb/s, 160kbs |
| Answer» B. 20 kb/s, 40kb/s, 80kb/s | |
| 174. |
Protocol used for low data rate WPAN is |
| A. | ieee 802.15.1 standard |
| B. | ieee 802.15.2 standard |
| C. | ieee 802.15.3 standard |
| D. | ieee 802.15.4 standard |
| Answer» E. | |
| 175. |
Unlike_____, ______achieves its power efficiency from both the physical and MAC layers |
| A. | ieee802.15.4 standard , smac protocol |
| B. | smac protocol , ieee802.15.4 standard |
| C. | ieee802.15.4 standard , bmac protocol |
| D. | none of above |
| Answer» C. ieee802.15.4 standard , bmac protocol | |
| 176. |
Following is/are features of ZigBee |
| A. | it is an industry consortium with the goal of promoting the ieee802.15.4 standard |
| B. | it ensures interoperability by defining higher network layers and application interfaces |
| C. | it is optimized for low data throughput up to 115.2 kbps, with simple or no qos support |
| D. | all of above |
| Answer» E. | |
| 177. |
The use of Ultra wideband (UWB) technology for WPANs is specified under the __________ standards. |
| A. | 802.15.1 |
| B. | 802.15.4 |
| C. | 802.15.3 |
| D. | 802.15.2 |
| Answer» D. 802.15.2 | |
| 178. |
Which of the following is Bluetooth's Physical layer? |
| A. | ultra wideband |
| B. | baseband |
| C. | broadband |
| D. | wideband |
| Answer» C. broadband | |
| 179. |
Which of the IEEE 802 standards defines the technologies used to form and manage personal area networks? |
| A. | 802.16 |
| B. | 802.11 |
| C. | 802.3 |
| D. | 802.15 |
| Answer» E. | |
| 180. |
What is the RF communications standard that can organize up to 8 devices into a piconet? |
| A. | bluetooth |
| B. | uwb |
| C. | zigbee |
| D. | irda |
| Answer» B. uwb | |
| 181. |
What is the term used to represent the IEEE 802.11 layer that controls access to the medium? |
| A. | wlan |
| B. | phy |
| C. | mac |
| D. | bss |
| Answer» D. bss | |
| 182. |
What term is used to represent the physical layer of an 802.11x standard? |
| A. | pyc |
| B. | phy |
| C. | bss |
| D. | wlan |
| Answer» C. bss | |
| 183. |
What industry association develops, publishes, and maintains the standards for wireless networks? |
| A. | ieee |
| B. | ism |
| C. | unii |
| D. | fcc |
| Answer» B. ism | |
| 184. |
Specifications for a wireless LAN are called |
| A. | standard 802.3z. |
| B. | standard 802.3u. |
| C. | project 802.3. |
| D. | ieee 802.11. |
| Answer» E. | |
| 185. |
What networking structure do the 802.11 standards define? |
| A. | wlan |
| B. | bbs |
| C. | wpan |
| D. | wman |
| Answer» B. bbs | |
| 186. |
Which one of the IEEE 802 committees is tasked with the development of security standards? |
| A. | 802.1 |
| B. | 802.16 |
| C. | 802.15 |
| D. | 802.11 |
| Answer» B. 802.16 | |
| 187. |
Following are features of ZigBee |
| A. | it is an industry consortium with the goal of promoting the ieee802.15.4 standard |
| B. | it ensures interoperability by defining higher network layers and application interfaces |
| C. | it is optimized for low data throughput up to 115.2 kbps, with simple or no qos support |
| D. | all of above |
| Answer» E. | |
| 188. |
___________is an industry consortium with the goal of promoting the IEEE802.15.4 standard |
| A. | bluetooth |
| B. | zigbee |
| C. | wifi |
| D. | nfc |
| Answer» C. wifi | |
| 189. |
___________defines both the physical and MAC layer protocols for most remote monitoring and control as well as sensor network applications |
| A. | s-mac protocol |
| B. | ieee802.15.4 standard |
| C. | wifi |
| D. | bluetooth |
| Answer» C. wifi | |
| 190. |
While defining a unifying architecture for sensor networks is still an open problem, a key element of such an architecture is the principled interaction between the______ &_____layers |
| A. | application /network |
| B. | application/transport |
| C. | transport/network |
| D. | transport/ application |
| Answer» B. application/transport | |
| 191. |
A one-to-one communication between one source and one destination is classified as a _______ communication. |
| A. | unicast |
| B. | multicast |
| C. | broadcast |
| D. | none of the above |
| Answer» B. multicast | |
| 192. |
A one-to-many communication between one source and a specific group of hosts is classified as a _______ communication. |
| A. | unicast |
| B. | multicast |
| C. | broadcast |
| D. | none of the above |
| Answer» C. broadcast | |
| 193. |
A one-to-all communication between one source and all hosts on a network is classified as a _______ communication. |
| A. | unicast |
| B. | multicast |
| C. | broadcast |
| D. | none of the above |
| Answer» D. none of the above | |
| 194. |
The RTS and CTS frames in CSMA/CA ____ solve the hidden station problem. The RTS and CTS frames in CSMA/CA ____ solve the exposed station problem. |
| A. | can; cannot |
| B. | cannot; can |
| C. | can; can |
| D. | cannot; cannot |
| Answer» B. cannot; can | |
| 195. |
The type of access used in GSM technology is |
| A. | tdma |
| B. | cdma |
| C. | ofdma |
| D. | none of the above |
| Answer» B. cdma | |
| 196. |
34. Uplinks are also knowns as |
| A. | reverse link |
| B. | bs link |
| C. | forward link |
| D. | ms link |
| Answer» B. bs link | |
| 197. |
What device is the wireless equivalent of a wired hub? |
| A. | bridge |
| B. | repeater |
| C. | antenna |
| D. | access-point |
| Answer» E. | |
| 198. |
What is shadowing? |
| A. | direct signal |
| B. | undirect signal |
| C. | signal strength |
| D. | signal range |
| Answer» C. signal strength | |
| 199. |
Distributed Topology Control |
| A. | is very simple to perform |
| B. | requires less time to stabilize |
| C. | more flexible, situation-aware |
| D. | less precise than centralized control. |
| Answer» D. less precise than centralized control. | |
| 200. |
Centralized Topology Control |
| A. | is very hard to perform |
| B. | requires significant communication overhead |
| C. | react well in case of changes. |
| D. | all are leading nodes |
| Answer» C. react well in case of changes. | |