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Interview Questions and Answers for 'Proofpoint' - 6 question(s) found - Order By Newest | ||||
Very frequently asked. Favorite question in Walk in Drive of many Indian service companies. Frequently asked in HCL Technologies, TCS and Accenture. | ||||
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Ans. final - constant variable, objects cannot be de-referenced, restricting method overriding, restricting class sub classing. finally - handles exception. The finally block is optional and provides a mechanism to clean up regardless of what happens within the try block. Use the finally block to close files or to release other system resources like database connections, statements etc. finalize() - method helps in garbage collection. A method that is invoked before an object is discarded by the garbage collector, allowing it to clean up its state. | ||||
Sample Code for final Sample Code for finally Sample Code for finalize | ||||
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Like Discuss Correct / Improve  java   oops   final   finally   finalize   final vs finally vs finalize Asked in 61 Companies basic   frequent | ||||
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Frequently asked in all types of companies especially Indian Services companies. Frequently asked in CTS (Based on 2 feedback) | ||||
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Ans. Hashcode is used for bucketing in Hash implementations like HashMap, HashTable, HashSet etc. The value received from hashcode() is used as bucket number for storing elements. This bucket number is the address of the element inside the set/map. when you do contains() then it will take the hashcode of the element, then look for the bucket where hashcode points to and if more than 1 element is found in the same bucket (multiple objects can have the same hashcode) then it uses the equals() method to evaluate if object are equal, and then decide if contain() is true or false, or decide if element could be added in the set or not. | ||||
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Like Discuss Correct / Improve  java   collections   hashcode   advanced  hashtable Asked in 33 Companies intermediate   frequent | ||||
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Ans. Encrypted User Name / Password Encrypted Password within Cookie Encrypted Tokens IP Client Certificates Oauth | ||||
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Like Discuss Correct / Improve  authentication  security  web service Asked in 12 Companies basic   frequent | ||||
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Ans. Abstract Classes provide default implementations of methods that are inherited by the classes that extend them, which was not the case for Interfaces. This changed in Java 8, where default implementations are provided for methods. | ||||
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Like Discuss Correct / Improve  abstract classes  interfaces  default method Asked in 1 Companies expert | ||||
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Ans. Read optimized | ||||
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Like Discuss Correct / Improve  cassandra Asked in 1 Companies | ||||
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Ans. Normalization is the process of splitting one Table into multiple so as to avoid Data duplication whereas Denormalization is the process of reducing Tables that creates data duplication but would remove joins in the queries. | ||||
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Like Discuss Correct / Improve  normalization  denormalization  normaization vs denormalization Asked in 1 Companies | ||||