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Java Collections Interview Questions and Answers

Here you can find Java Collections Interview Questions and Answers.

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In this Java Collections Interview Questions and Answers section you can learn and practice Java Collections Interview Questions and Answers to improve your skills in order to face technical inerview by IT companies. By Practicing these interview questions, you can easily crack any Java Collections interview.

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Java Collections Interview Questions and Answers

What are limitations of object Arrays?

The main limitations of Object arrays are 1. These are fixed in size ie once we created an array object there is no chance of increasing or decreasing size based on our requirement. 2. Hence If we don’t know size in advance , arrays are not recommended to use 3. Arrays can hold only homogeneous elements. 4. There is no underlying data structure for arrays and hence no readymade method support for arrays. 5. Hence for every requirement programmer has to code explicitly 6. To over come these problems collections are recommended to use

Java Collections Interview Questions and Answers

What is Collection API ?

It defines set of classes and interfaces which can be used for representing a group of objects as single entity

Java Collections Interview Questions and Answers

What is Collection framework?

It defines set of classes and inter faces which can be used for representing a group of objects as single entity

Java Collections Interview Questions and Answers

What is difference between Collections and Collection?

Collection is an interface which can be used for representing a group of individual objects as single entity and it acts as root interface of collection frame work. Collections is an utility class to define several utility methods for Collection implemented class objects.

Java Collections Interview Questions and Answers

Explain about Collection interface?

* This interface can be used to represent a group of objects as a single entity. * It acts as root interface for entire collection framework. * It defines the most commonly used methods which can be applicable for any collection implemented class object

Java Collections Interview Questions and Answers

Explain about List interface?

List interface is a child interface of Collection interface. This can be used to represent group of individual objects in as a single entity where Duplicates are allowed Insertion order is preserved

Java Collections Interview Questions and Answers

Explain about Set interface?

Set is a child interface of Collection interface. it can be used to represent a group of individual objects as a single entity where Duplicate objects are not allowed. Insertion order is not preserved

Java Collections Interview Questions and Answers

Explain about SortedSet interface?

it is child interface of Set interface. it can be used to represent a group of individual objects in to a single entity where All the objects are arranged in some sorting order (Can be natural sorting order or customizede). Duplicates are not allowed.

Java Collections Interview Questions and Answers

Explain about NavigableSet ?

It is child interface of SortedSet and provides several utility methods for navigation purposes It doesn’t allows duplicates Insertion order is preserved It is introduced in 1.6 version

Java Collections Interview Questions and Answers

Explain about Queue interface?

If we want to represent a group of individual objects prior to processing, then we should go for Queue interface. It is child interface of Collection interface. It has introduced in 1.5 version.

Home InterviewTechnical Interview Questions and AnswersJava Interview QuestionsJava Collections

Java Collections Interview Questions and Answers

  • What are limitations of object Arrays?
  • What are differences between arrays and collections?
  • what are differences between arrays and ArrayList?
  • What are differences between arrays and Vector?
  • What is Collection API ?
  • What is Collection framework?
  • What  is difference between Collections and Collection?
  • Explain about Collection interface?
  • Explain about List interface?
  • Explain about Set interface?
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