Java Collection Framework interviewquestions and answerscontains questions from popular Java collection classes e.g.HashMap,ArrayList,HashSet,ConcurrentHashMapand legacy collection classes like Vector andHashtable. Interview questions from Java Collection framework is one of the most asked concept on anyCor...
For example, some Collection implementations like List allow duplicate elements whereas other implementations like Set don't. A lot of the Collection implementations have a public clone method. However, it doesn't make sense to include it in all implementations of Collection. This is because Collect...
It serves as a design rationale for the collections framework. Core Interfaces - General Questions Why don't you support immutability directly in the core collection interfaces so that you can do away with optional operations (and UnsupportedOperationException)? Won't programmers have to surround ...
The subject of generics is at least as broad as the Java Collections Framework. In the context of this article, we will only discuss the bare minimum needed to understand the collections framework. It’s OK to have a lot of open questions after this brief overview. Everything will be expla...
Overview - An overview of the collections framework. Annotated API Outline - An annotated outline of the classes and interfaces comprising the collections framework, with links into the API Specification. Design FAQ - Answers to frequently asked questions (FAQ) about the design of the collections fr...
1.JDBC Interview Questions and Answers If you are working on Enterprise applications, I am sure that JDBC API is a part of it. JDBC API provides database connectivity for relational databases, such as MySQL and Oracle. This article has a collection of 40+ interview questions related to the ...
This isClassical Java Collection interview questionswhich I have also discussed in How HashMap works in Java. This collection interview questions is mostly asked during AVP Role interviews on Investment-Banks and has lot of followup questions based on response of interviewee e.g. Why HashMap keys...
Below are some Frequently asked questions related to the framework in Java: Q1. What are the benefits of using frameworks in Java development? Frameworks offer several advantages, including faster development, code reusability, maintainability, scalability, improved productivity, adherence to best practices...
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9) Which collection classes allow NULL? ArrayList, LinkedList, HashSet, HashMap (keys & values) and Hashtable (values only) all allow NULL. The two exceptions are TreeMap and TreeSet. 10) What happens if we add the same key with different values to a HashMap?