Interview Questions
Java
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Which method of the Component class is used to set the position and size of a component? |
| Ans: setBounds(). |
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What is the difference between the >> and >>> operators? |
| Ans: The >> operator carries the sign bit when shifting right. The >>> zero-fills bits that have been shifted out. |
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What is an Iterator interface? |
| Ans: The Iterator interface is used to step through the elements of a Collection. |
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What modifiers may be used with an inner class that is a member of an outer class? |
| Ans: A (non-local) inner class may be declared as public, protected, private, static, final, or abstract. |
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What is the Vector class? |
| Ans: The Vector class provides the capability to implement a growable array of objects. |
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How does Java handle integer overflows and underflows? |
| Ans: It uses those low order bytes of the result that can fit into the size of the type allowed by the operation. |
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What is the List interface? |
| Ans: The List interface provides support for ordered collections of objects. |
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Which characters may be used as the second character of an identifier,but not as the first character of an identifier? |
| Ans: The digits 0 through 9 may not be used as the first character of an identifier but they may be used after the first character of an identifier. |
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What is the Collections API? |
| Ans: The Collections API is a set of classes and interfaces that support operations on collections of objects. |
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What state does a thread enter when it terminates its processing? |
| Ans: When a thread terminates its processing, it enters the dead state. |