Java Interview Guide : 200+ Interview Questions and Answers - Collection Code Examples

Java Interview Guide : 200+ Interview Questions and Answers - Collection Code Examples

Assessment

Interactive Video

Information Technology (IT), Architecture, Physical Ed

University

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

The video tutorial provides an in-depth exploration of Java collections, covering various implementations such as ArrayList, HashSet, TreeSet, HashMap, and TreeMap. It explains operations like adding, removing, and sorting elements, and highlights the use of Comparable and Comparator interfaces for sorting. The tutorial also delves into the functionality of NavigableSet and NavigableMap, as well as the PriorityQueue with natural and custom ordering. Finally, it discusses static methods in the Collections class, offering practical examples and coding exercises to reinforce learning.

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10 questions

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1.

OPEN ENDED QUESTION

3 mins • 1 pt

What is auto boxing in the context of collections?

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2.

OPEN ENDED QUESTION

3 mins • 1 pt

Explain how to add an element at a specific index in an ArrayList.

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3.

OPEN ENDED QUESTION

3 mins • 1 pt

What is the role of the 'contains' method in an ArrayList?

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4.

OPEN ENDED QUESTION

3 mins • 1 pt

What is the significance of the Comparable interface in sorting collections?

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5.

OPEN ENDED QUESTION

3 mins • 1 pt

How can you sort a collection using a custom comparator?

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6.

OPEN ENDED QUESTION

3 mins • 1 pt

What happens when you try to add a duplicate element to a Set?

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7.

OPEN ENDED QUESTION

3 mins • 1 pt

Describe the difference between a HashMap and a TreeMap.

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