Describe how the Scanner class works with the System.in object in order to provide flexibility. Provide an example of using the Scanner class with System.in.
What will be an ideal response?
The System.in object is designed to read bytes only. Since it is common to accept data of other types, the Scanner object can connect to the System.in property. This creates a Scanner object that will be connected to the default input device.?Scanner inputDevice = new Scanner(System.in);
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A stream operation that converts the stream it is applied to into another stream is called
A) a terminal operation B) a final operation C) an intermediate operation D) a reduction
How is the "heartbeat" used in failover clusters?
What will be an ideal response?
How much data (in number of characters) must be exchanged between A and B in order for the connection-oriented communication to yield a shorter session than the connectionless communication? Explain.
In this exercise we will use a simplified mathematical model to analyze the tradeoff between connection-oriented communication and connectionless communication. Explain your answer. On a certain network both forms of communication are provided: • Using connection-oriented communication, it takes 50 second to establish a connection, after which a packet of up to 10 characters can be sent in 1.0 seconds over the connection, in either direction. • Using connectionless communication, a packet of up to 10 characters can be sent in 1.2 second. (The sending of each packet takes slightly longer than in the connection-oriented case, since each packet must find its way to the receiver.) Suppose A and B exchanges messages on this network. A initiates the communication and sends to B a message of 100 characters, which are partitioned into 10 packets. In reply, B sends a message of 50 characters, which are partitioned into 5 packets. Assuming that there is no delay other than the time it takes for establishing a connection (in the connection-oriented case) and for packet transmission:
All of the following are examples of data types EXCEPT:
A) Date/Time. B) Currency. C) Noun. D) Number.