Java Programming and Technical HR Interview Interview

Q. What is the List interface?

A. The List interface provides support for ordered collections of objects. Lists may contain duplicate elements.

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A List interface can be used to represent group of individual objects into a single entity where insertion order is preserved and duplicates are also allowed
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Java Other Question

Q. What is an Iterator ?

A. The Iterator interface is used to step through the elements of a Collection. Iterators let you process each element of a Collection. Iterators are a generic way to go through all the elements of a Collection no matter how it is organized. Iterator is an Interface implemented a different way for every Collection Q. What is memory leak?

A. A memory leak is where an unreferenced object that will never be used again still hangs around in memory and doesnt get garbage collected