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|Interview Questions and Answers|
|Not frequently asked as it was introduced with Java 8.|
|Ans. StringJoiner is a util method to construct a string with desired delimiter. This has been introduced with wef from Java 8.|
StringJoiner strJoiner = new StringJoiner(".");
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|Like Discuss Correct / Improve  java   java8   java 8   string   stringjoiner|
|Difference between == and .equals() ?|
|Why is String immutable in Java ?|
| Explain the scenerios to choose between String , StringBuilder and StringBuffer ?|
What is the difference between String , StringBuilder and StringBuffer ?
|Why Char array is preferred over String for storing password?|
|What are different ways to create String Object? Explain.|
|What is a String Pool ?|
|How does making string as immutable helps with securing information ? How does String Pool pose a security threat ?|
|How is string object immutable if we can concat a string to it ?|
| Which of the following is false about main method ?|
a. It should be declared public and static
b. it should have only 1 argument of type String array
c. We can override main method
d. We can overload main method