Is ping a connectionless or a connection-oriented program, and which layer and protocol does it use?
What will be an ideal response?
Ping communications are connectionless, using the ICMP Internet layer protocol.
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Select the false statement. If an exception is thrown from a constructor:
a. The object being constructed will not be constructed. b. For an array, destructors for all array elements are called, even if those array elements have not yet been constructed. c. The exception can contain the error information that the constructor would not be able to return in the normal manner. d. For an object with member objects, and whose outer object has not been constructed, the destructor is called for the member objects.
The ________ operator can be used to convert a value from one data type to another, much like the methods of class Convert.
a) convert b) cast c) type d) multiplication e) None of the above.
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.
Answer the following questions true (T) or false (F)
1. The class JColorChooser can be used to produce a dialog window that allows you to choose a color by looking at color samples. 2. The Java language does not support multithreading.