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| Interview Questions and Answers for 'Customer centria' - 2 question(s) found - Order By Rating | ||||
 Frequently asked at HCL Technologies ( Based on 3 feedback ) | ||||
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| Ans. Checked exceptions are the exceptions for which compiler throws an errors if they are not checked whereas unchecked exceptions are caught during run time only and hence can't be checked. | ||||
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 Discuss Correct / Improve  java exceptions checked exceptions unchecked exceptions exception handling checked vs unchecked exceptions  Asked in 39 Companies  basic  frequent | ||||
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 Related Questions | ||||
 Checked exception needs to be ... | ||||
| Give an Example of checked and unchecked exception ? | ||||
| Very frequently asked in different variations. Frequently asked in Deloitte ( 2 feedback ) , HCL Tech ( 3 feedback ), TCS and Coginizant (CTS) | ||||
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| Ans. If the Object value will not change, use String Class because a String object is immutable. If the Object value can change and will only be modified from a single thread, use StringBuilder because StringBuilder is unsynchronized(means faster). If the Object value may change, and can be modified by multiple threads, use a StringBuffer because StringBuffer is thread safe(synchronized). | ||||
 Sample Code for String Sample Code for StringBuffer Sample Code for StringBuilder | ||||
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| Discuss Correct / Improve java string class string stringbuilder stringbuffer String vs StringBuffer String vs StringBuilder String vs StringBuilder vs StringBuffer StringBuffer vs stringBuilder Asked in 29 Companies basic frequent | ||||
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| Related Questions | ||||
| Difference between == and .equals() ? | ||||
| Why is String immutable in Java ? | ||||
| 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 ? | ||||
| What is StringJoiner ? | ||||
| 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 | ||||
