Systems that are space-coupled but time- uncoupled – that is, messages are directed towards a given receiver (or receivers), but that receiver can have a lifetime independent from the sender’s. Can you construct a communication paradigm with these properties? For example, does email fall into this category?
What will be an ideal response?
This is a subtle point and we invite the reader to dwell on this themselves. Is there a communication paradigm whereby a message is directed towards a given named receiver with known identity and hence bound in space, but where the sender and recipient have different lifetimes? This partially depends on the interpretation of different lifetimes, that is whether this implies the receiver may not exist yet or whether the receiver does exist
Distributed Systems, Edition 5: Chapter 6 Solutions (indirect).fm 1
Last updated: 28 October 2011 2:21 pm ©George Coulouris, Jean Dollimore and Tim Kindberg and Gordon Blair 2012
but is not available at a given time to receive a message. If we take the first interpretation, we can think of a non-computer example, that is a letter addressed to a yet unborn great-grandchild. We can also think about time capsules addressed to a given recipient. If we take the second interpretation, then email does fit this category, that is a mail message is directed towards a known receiver who may or may not be around at a given time but who will receive the message when next connected. Note that this assumes that we are focusing on the delivery of the message to the intended person rather than their mailbox.
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Which of the following statements is false?
a. A finally block is placed after the last catch block. b. A finally block typically releases resources acquired in the corresponding try block. c. The finally block and try block can appear in any order. d. A finally block is optional.
If you do not need efficient random access but need to efficiently move sequentially through the list, then use the _____________ class.
(a) Vector
The ________ function calculates the average, or arithmetic mean, of all cells in a range that meet a specific condition
Fill in the blank(s) with correct word
A(n) ____________________ chart uses bars of varying heights to illustrate values in a worksheet.
Fill in the blank(s) with the appropriate word(s).