2900282
Frage 1
Frage
Which of the following is true about typical RPC
Antworten
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Synchronous and transient
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Synchronous and persistent
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Nonblocking and transient
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Synchronous and temporary
Frage 2
Frage
What is not a common protocol that middleware provides?
Antworten
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Security
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Transaction
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Message queuing
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Concurrency
Frage 3
Frage
Which of these is not a type of synchronicity?
Antworten
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Persistent asynchronous communication
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Receipt-based transient synchronous communication
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Response-based transient synchronous communication
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Multicast response synchronization
Frage 4
Frage
This is not an interleaved transmission
Antworten
- True
- False
Frage 5
Frage
Which of the following is false about publish-subscribe
Antworten
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One message might be delivered to multiple recipients
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Subscriptions may be conditional upon the content of the message
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The broker is responsible for deciding which subscribers should receive the message
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The sender specifies which recipients should receive the message
Frage 6
Frage
Which of these is NOT an issue resolved by Parameter marshaling?
Antworten
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Client and server have different data representations
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Client and server have to agree on the same encoding
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Interpreting data and transforming it into machine dependent representation
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Generating stubs to interface with server side application
Frage 7
Frage
What does Message-oriented communication typically allow over traditional RPC?
Antworten
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Asynchronous communication
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Persistent communication
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Reliable communication
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Multicast RMI
Frage 8
Frage
When is stream-oriented communication appropriate?
Antworten
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When the the temporal relationship between different data items is essential
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When large blocks of data such as video files are involved
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When reliable communication is not required
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When buffering is not acceptable
Frage 9
Frage
Which of the following is true about Persistent synchronous communication if the recipient is not running
Antworten
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The message is stored and the sender receives accepted acknowledgement immediatley
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The message is stored and the sender receives accepted acknowledgement when the recipient starts
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The sender is blocked until the receiver starts
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The message is discarded and the sender is notified when the receiver starts
Frage 10
Frage
Which is true about Transient asynchronous communication if the reciever is not running
Antworten
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The message will not be received but the sender won't be blocked
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The message will be queued until the receiver starts
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The sender will automatically retry until receiver starts
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The message will not be received and the sender will be blocked
Frage 11
Frage
Which of the following is true about parameter specifications and stubs?
Antworten
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Parameters passed by value do generally pose any problems
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It is only possible to pass parameters by value if they are primitive data types
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Interfaces (procedures) are often specified in Interface Definition Languages (IDL) and compiled into stubs
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It is completely impossible to pass parameters by reference
Frage 12
Antworten
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Receipt-based transient synchronous communication
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Transient asynchronous communication
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Delivery-based transient synchronous communication at message delivery
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Persistent synchronous communication
Frage 13
Frage
What are the basic operations of a message queue?
Antworten
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Put, Get, Poll, Notify
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Push, Get, Poll, Notify
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Pop, Get, Poll, Subscribe
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Put, Get, Notify, Acknowledge
Frage 14
Frage
What is the main role of a message broker?
Antworten
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To transform messages from sender's format to receive'’s format
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To handle retries if a receiver fails to acknowledge the message
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To manage who is authorized to subscribe to which queue
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To balance messages between multiple storage queues
Frage 15
Antworten
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Traditional RPC
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Asynchronous RPC
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Passing a value by reference
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A callback following an asynchronous RPC
Frage 16
Frage
Which layer does the middleware layer sit between?
Antworten
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Application and transport
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Transport and network
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Application and network
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Operating system and Network
Frage 17
Antworten
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Persistent asynchronous communication
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Persistent synchronous communication
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Response-based transient synchronous communication
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Transient asynchronous communication
Frage 18
Frage
Is the caller of an RPC usually blocked while waiting for a result?
Antworten
- True
- False
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