Interview Questions
Java
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To what value is a variable of the String type automatically initialized? |
| Ans: The default value of an String type is null. |
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To what value is a variable of the String type automatically initialized? |
| Ans: The default value of an String type is null. |
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When a thread blocks on I/O, what state does it enter? |
| Ans: A thread enters the waiting state when it blocks on I/O. |
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What are order of precedence and associativity, and how are they used? |
| Ans: Order of precedence determines the order in which operators are evaluated in expressions. Associatity determines whether an expression is evaluated left-to-right or right-to-left. |
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Can a for statement loop indefinitely? |
| Ans: Yes, a for statement can loop indefinitely. For example, consider the following: for(;;). |
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What is a native method? |
| Ans: A native method is a method that is implemented in a language other than Java. |
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What is clipping? |
| Ans: Clipping is the process of confining paint operations to a limited area or shape. |
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What is the immediate superclass of the Dialog class? |
| Ans: Window. |
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What value does readLine() return when it has reached the end of a file? |
| Ans: The readLine() method returns null when it has reached the end of a file. |
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Name three Component subclasses that support painting. |
| Ans: The Canvas, Frame, Panel, and Applet classes support painting. |