What is a class and object, its state and behavior, Inheritance, overiding vs overloading, wrapper class, constructors, string buffer vs string builder, difference between abstract class and interface, encapsulation and abstraction, about pointers and multiple inheritance (java vs c), garbage collection, final, finally and finalize blocks, exception handling, access specifiers.
How to backup and restore a database in MySQL and MS SQL ? What are groupby, having insert, update,alter, drop, delete, truncate, all joins.
Debug a program that is supposed to print a 2D array in a specific order.
Core Java questions and C questions
What is your code debugging process?
What indexes would be recommended on the emails table. Provide the command(s) necessary to create these.
Give the command(s) necessary to create a further table to store email events to include fields event type (a string) and a creation timestamp. The relationship from emails to events is one-to-many.
What are your biggest achievements?
About Hadoop, HDP, Most of Linux question since am a Linux admin and real time issues, scenarios and troubleshooting questions
Debugging unix issues like ssh login
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