Cloud Computing Multiple Choice Questions on “Push Services”.
1. Which of the following allows an IMAP server to automatically keep a connection alive?
a) P-IMAP
b) C-IMAP
c) I-IMAP
d) None of the mentioned
Answer: a
Clarification: P-IMAP contains a feature that sends rich email in a manner similar to SMTP.
2. Point out the wrong statement.
a) All push technologies used in mobile applications are server-based
b) Push email is the penultimate example of a push service
c) In push email, the service is always connected to the client, and it sends out to the client more or less immediately any new email that arrives at the server
d) All of the mentioned
Answer: a
Clarification: Not all push technologies used in mobile applications are server-based.
3. Which of the following IMAP command is used to update and amounts to a heartbeat signal and response?
a) EXIT
b) IDLE
c) CLOSE
d) All of the mentioned
Answer: b
Clarification: Some polling mechanisms set the polling interval so short that the system appears to behave as if it is a push technology.
4. Which of the following services uses push email?
a) Apple MobileMe
b) Google Gmail
c) RIM’s BlackBerry Enterprise Server
d) All of the mentioned
Answer: d
Clarification: Both push and polling have pluses and minuses associated with them.
5. Point out the correct statement.
a) The well-known email protocol POP3 is a polling protocol
b) IMAP cannot support both push and polling
c) Push-IMAP is a push technology, as is the SMTP protocol
d) All of the mentioned
Answer: a
Clarification: IMAP can support both push and polling.
6. Which of the following is an incorrect step in pushing blackberry service?
a) Content provider sends a push request to the server
b) BlackBerry servers send a response back to the content provider
c) BlackBerry servers forward the acknowledgement to the content provider
d) All of the mentioned
Answer: d
Clarification: The Push Service transfers up to 8KB messages directly.
7. Which of the following uses a set of email extensions to provide access to mobile devices?
a) Black Profile
b) Lemonade Profile
c) B2B Profile
d) None of the mentioned
Answer: a
Clarification: The Lemonade Profile is an alternative mechanism for push email.
8. The Lemonade Profile is a specification of the _____ as RFC 5550.
a) IETF
b) IETE
c) IETC
d) All of the mentioned
Answer: a
Clarification: A Push-IMAP specification has been developed but not standardized.
9. How many number of characters can be sent in a single message through SMS?
a) 140
b) 200
c) 240
d) None of the mentioned
Answer: b
Clarification: The Short Message Service (SMS) is a text-notification service that has evolved into a primary communications protocol for near-real-time message passing.
10. Which of the following allows longer messages to be sent using multiple packets containing a User Data Header that contains the segment number?
a) Long SMS
b) Large SMS
c) Big SMS
d) All of the mentioned
Answer: a
Clarification: The limit for this multipart or segmented SMS is 153 characters for 7-bit, 134 for 8-bit, and 67 for 16-bit encoding.