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Core Java Interview Questions and Answers

Ques 136. If an object is garbage collected, can it become reachable again?

Ans. Once an object is garbage collected, it ceases to exist. It can no longer become reachable again.

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Ques 137. What are E and PI?
Ans. E is the base of the natural logarithm and PI is mathematical value pi.
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Ques 138. Are true and false keywords?
Ans. The values true and false are not keywords.
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Ques 139. What is the difference between the File and RandomAccessFile classes?
Ans. The File class encapsulates the files and directories of the local file system. The RandomAccessFile class provides the methods needed to directly access data contained in any part of a file.
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Ques 140. What happens when you add a double value to a String?
Ans. The result is a String object.
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