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Interview Questions and Answers for 'Opentext' - 3 question(s) found - Order By Newest

  Q1. Write a method to check if input String is Palindrome?Core Java
Ans. private static boolean isPalindrome(String str) {

if (str == null)
return false;

StringBuilder strBuilder = new StringBuilder(str);

strBuilder.reverse();

return strBuilder.toString().equals(str);

}

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   Like         Discuss         Correct / Improve     java   string   stringbuilder   stringbuilder   string class   code   palindrome     Asked in 38 Companies      Basic        frequent


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 Q2. Explain servlet lifecycleJava EE
Ans. Init -> service -> destroy.

Out of these, init and destroy are called once per servlet whereas service is called every time when a request is made to the servlet.

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   Like         Discuss         Correct / Improve     servlet     Asked in 6 Companies


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 Q3. What is Throwable ?Core Java
Ans. Throwable in java is a class that is the superclass of all exceptions and errors which may occurs in java program.It extends obcect class.

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   Like         Discuss         Correct / Improve     exception handling   throwable     Asked in 1 Companies      basic


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