This set of Cloud Computing Multiple Choice Questions & Answers (MCQs) focuses on “MEMS”.
1. ________ Wireless operates services are based on a Wi-Fi Positioning System (WPS).
a) Skydrive
b) Skyhook
c) SkyLook
d) None of the mentioned
View Answer
Explanation: The advantage of WPS is that there are hundreds of millions of Wi-Fi access points worldwide and they are closer to the mobile device.
2. Point out the wrong statement.
a) MEMS stands for microelectromechanical systems
b) MEMS as a class can be between 1000 and 100000 micrometers in size
c) Several MEMS are packaged in smartphones
d) All of the mentioned
View Answer
Explanation: MEMS as a class can be between 1 and 1000 micrometers in size.
3. Which of the following system is constantly polling locations to update them and recalibrating data points to improve accuracy over time?
a) WPS
b) GPS
c) XPS
d) All of the mentioned
View Answer
Explanation: The system uses a large reference database of Wi-Fi access points and cell tower IDs, raw position data from each location source (a signal), and the company’s proprietary algorithm to locate the device.
4. Which of the following has a Java API that works with the Skyhook network?
a) Looki
b) Look
c) Loki
d) All of the mentioned
View Answer
Explanation: Loki has its browser plug-in to locate users for subscribing Websites.
5. Point out the correct statement.
a) MEMS is a class of very small sensor or actuator devices where small mechanical systems are driven by electricity to indicate a position
b) The incorporation of low-cost geo-sensors in the form of GPS chips into mobile devices opens the mobile user to a whole range of services based on the client’s location
c) The iPhone uses the proximity sensor to turn the screen off when a user puts the phone to his face
d) All of the mentioned
View Answer
Explanation: There are many more contexts that can be used in processing client requests and returning relevant information.
6. Which of the following service is an example of push technology?
a) Automated software updates
b) Comet
c) HTTP streaming
d) All of the mentioned
View Answer
Explanation: The opposite of a push is a pull technology, in which the client polls for and requests a transaction.
7. The IRC protocol and the XMPP IM and VoIP protocol are examples of ______ push technologies.
a) P2P
b) C2C
c) B2B
d) None of the mentioned
View Answer
Explanation: The XMPP PubSub extension is how Apple creates a push service for MobileMe.
8. Which of the following transport protocol combined with XMPP can be used for push service?
a) BOSH
b) UOSH
c) MOSH
d) All of the mentioned
View Answer
Explanation: BOSH stands for Bidirectional Streams Over Synchronous HTTP.
9. In the parlance of system design, the active transfer process is referred to as “push” and server is called _______
a) CDN
b) MDA
c) MDB
d) None of the mentioned
View Answer
Explanation: client is called Mail User Agent(MUA).
10. Which of the following push technology is similar to SMTP?
a) Push-IMAP
b) Pull-IMAP
c) Push-POP3
d) All of the mentioned
View Answer
Explanation: Push-IMAP stands for the Push extensions for Internet Message Access Protocol.
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