what is wrapper class
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Json format REST API request and response Reverse the string without using temp variable
What is oops concepts, single tone class, difference between comparator and comparable difference between Hash map and Set . what is wrapper class. Serialisation in Java etc.
What are the oops concepts ?
Live App Coding If everything goes well still I don't understand why they don't reply
What is the company doing?
Comparable and Comparator , Spring MVC
singleton design pattern
Oops Concept
I was asked two questions in first round- a. find subarrays which has the given sum in a one dimensional array. b. find largest distinctive string in the given string. I was asked to design the tiny url in system design.
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