Udemy
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
Development
Web Development Data Science Mobile Development Programming Languages Game Development Database Design & Development Software Testing Software Engineering Development Tools No-Code Development
Business
Entrepreneurship Communications Management Sales Business Strategy Operations Project Management Business Law Business Analytics & Intelligence Human Resources Industry E-Commerce Media Real Estate Other Business
Finance & Accounting
Accounting & Bookkeeping Compliance Cryptocurrency & Blockchain Economics Finance Finance Cert & Exam Prep Financial Modeling & Analysis Investing & Trading Money Management Tools Taxes Other Finance & Accounting
IT & Software
IT Certification Network & Security Hardware Operating Systems Other IT & Software
Office Productivity
Microsoft Apple Google SAP Oracle Other Office Productivity
Personal Development
Personal Transformation Personal Productivity Leadership Career Development Parenting & Relationships Happiness Esoteric Practices Religion & Spirituality Personal Brand Building Creativity Influence Self Esteem & Confidence Stress Management Memory & Study Skills Motivation Other Personal Development
Design
Web Design Graphic Design & Illustration Design Tools User Experience Design Game Design Design Thinking 3D & Animation Fashion Design Architectural Design Interior Design Other Design
Marketing
Digital Marketing Search Engine Optimization Social Media Marketing Branding Marketing Fundamentals Marketing Analytics & Automation Public Relations Advertising Video & Mobile Marketing Content Marketing Growth Hacking Affiliate Marketing Product Marketing Other Marketing
Lifestyle
Arts & Crafts Beauty & Makeup Esoteric Practices Food & Beverage Gaming Home Improvement Pet Care & Training Travel Other Lifestyle
Photography & Video
Digital Photography Photography Portrait Photography Photography Tools Commercial Photography Video Design Other Photography & Video
Health & Fitness
Fitness General Health Sports Nutrition Yoga Mental Health Dieting Self Defense Safety & First Aid Dance Meditation Other Health & Fitness
Music
Instruments Music Production Music Fundamentals Vocal Music Techniques Music Software Other Music
Teaching & Academics
Engineering Humanities Math Science Online Education Social Science Language Teacher Training Test Prep Other Teaching & Academics
AWS Certification Microsoft Certification AWS Certified Solutions Architect - Associate AWS Certified Cloud Practitioner CompTIA A+ Cisco CCNA CompTIA Security+ Amazon AWS AWS Certified Developer - Associate
Graphic Design Photoshop Adobe Illustrator Drawing Digital Painting InDesign Character Design Canva Figure Drawing
Life Coach Training Neuro-Linguistic Programming Mindfulness Personal Development Personal Transformation Meditation Life Purpose Emotional Intelligence Neuroscience
Web Development JavaScript React CSS Angular PHP WordPress Node.Js Python
Google Flutter Android Development iOS Development Swift React Native Dart Programming Language Mobile Development Kotlin SwiftUI
Digital Marketing Google Ads (Adwords) Social Media Marketing Google Ads (AdWords) Certification Marketing Strategy Internet Marketing YouTube Marketing Email Marketing Google Analytics
SQL Microsoft Power BI Tableau Business Analysis Business Intelligence MySQL Data Modeling Data Analysis Big Data
Business Fundamentals Entrepreneurship Fundamentals Business Strategy Online Business Business Plan Startup Freelancing Blogging Home Business
Unity Game Development Fundamentals Unreal Engine C# 3D Game Development C++ 2D Game Development Unreal Engine Blueprints Blender
30-Day Money-Back Guarantee
IT & Software IT Certification Java

Java Interview Preparation || 100+ Quality Questions Covered

Core Java, Java 8, Collection, Design Patterns, Exception Interview Questions
Rating: 3.9 out of 53.9 (18 ratings)
536 students
Created by Alfa e-Learning
Last updated 11/2020
English
English [Auto]
30-Day Money-Back Guarantee

What you'll learn

  • Core Java Interview Questions
  • Java 8 Interview Questions
  • Collection Interview Questions
  • Design Pattern Interview Questions
  • Exception Interview Questions

Requirements

  • Need to have basic idea of core Java

Description

***** Some Reviews From Students *****

" Great explanations on questions. "

Welcome to Java Interview Preparation Course. This course will help you to crack your next Java interview.

This course will help you to crack your next Java Interview by brushing up your Java knowledge.

You will get clarifications of Java concepts from basic to advanced such as -

  • Java Platform - JVM, JRE, JDK

  • Java 8 Interview Questions - Functional Interface, Lambda Function, Stream API, Optional

  • OOPs concepts - Inheritance, Polymorphism, Abstraction, Encapsulation

  • Exception

  • Collection

  • Design Patterns - Singleton Design Pattern, Factory Design Pattern

Who this course is for:

  • Anyone who has basic idea of core Java

Course content

10 sections • 106 lectures • 2h 24m total length

  • Preview00:53
  • Practice Code
    00:04

  • Preview01:54
  • Preview01:44
  • Is Java platform independent ? Why ?
    01:46
  • Difference between Java and C++
    01:39
  • What if I write static public void instead of public static void ?
    00:01
  • Explain Access Modifiers in Java.
    00:10

  • Explain OOPs Concepts With Real Time Examples
    04:16
  • How to prevent inheritance and method overriding ?
    02:42
  • Can we declare main method as final ?
    02:18
  • Is Multiple inheritance supported in Java ? Why ?
    03:37
  • Execution sequence for static block, block, constructor and method.
    03:26
  • Can we run abstract class which has main method ?
    01:47
  • What is Marker Interface ?
    02:14
  • Difference between an Interface and Abstract Class
    00:21
  • Can we override a static method ?
    00:02
  • Can we make constructors static ?
    00:12
  • Can we override the overloaded method ?
    00:02
  • Can we override the private methods ?
    00:06
  • Difference between Constructor and Method ?
    00:12
  • Can we execute a program without main() method ?
    00:02
  • Can you use abstract and final both with a method ?
    00:04
  • Can we declare a constructor as final ?
    00:07
  • Can we declare an interface as final ?
    00:10
  • Distinguish between static loading and dynamic class loading ?
    00:07

  • Preview03:08
  • How to create Custom Exception Class ?
    03:19
  • Is there any case when finally will not be executed ?
    03:09
  • Which is the base class of all exception classes ?
    00:00
  • Explain about Exception Propagation
    00:09
  • Difference between throw and throws.
    00:09
  • Difference between Error and Exception.
    00:14

  • Difference between List and Set
    05:43
  • Unmodifiable Collcetion
    01:42
  • What is UnSupportedOperationException ?
    02:07
  • Difference between peek(),poll() and remove() method of the Queue interface.
    06:07
  • How HashMap internally works ?
    00:18
  • How HashSet works internally ?
    00:05
  • Difference between ArrayList and Vector
    00:28
  • Difference between HashMap and HashTable
    00:16
  • Difference Between Iterator And Enumeration
    00:09
  • Difference between Iterator and ListIterator
    00:11
  • Difference between Fail Fast iterator and Fail Safe iterator
    00:16
  • How Fail Fast Iterator come to know that the internal structure is modified ?
    00:15
  • Difference between HashSet and TreeSet
    00:06
  • Difference between HashMap and ConcurrentHashMap
    00:07
  • Difference between ArrayList and LinkedList
    00:16
  • Why Map interface does not extend the Collection interface ?
    00:16
  • What is hash-collision ? How it is handled in Java ?
    00:07
  • How do you convert a given Collection to SynchronizedCollection ?
    00:02
  • Why ArrayList is better than Arrays ?
    00:02
  • For addition and deletion. Which one is most preferred ArrayList or LinkedList ?
    00:03
  • For searches. Which one is most preferred: ArrayList or LinkedList ?
    00:02
  • Difference between Array and ArrayList.
    00:09
  • Explain TreeMap.
    00:08
  • Difference between HashMap and TreeMap
    00:10
  • What is the difference between Collection and Collections ?
    00:09

  • Preview07:58
  • Preview05:20
  • How to create Immutable Class ?
    09:25
  • Difference between Static Class and Singleton Class ?
    00:17
  • Which design patterns are used in JDK ?
    00:08

  • Preview01:29
  • What is Functional Interface ?
    06:04
  • What is Lambda Expression ?
    03:42
  • What is Stream API ?
    08:01
  • What is Optional ?
    03:42
  • What is StringJoiner ?
    05:31
  • Difference between Collection API and Stream API
    00:27
  • What kind of variable you can access in an lambda expression ?
    00:08
  • Difference between Iterator and Spliterator
    00:13
  • Differences between Java’s OLD Date API and Java 8’s Date and Time API
    00:12

  • What is Serialization ?
    06:17
  • What is Deserialization ?
    04:00
  • What is transient variable ?
    03:39
  • What is SerialVersionUID ?
    05:55

  • In how may ways we can create an object in Java ?
    03:45
  • What is Ternary Operator ?
    03:19
  • What is the purpose of a Volatile Variable ?
    00:05
  • What is Externalizable ?
    00:03
  • What is the difference between a static and a non-static inner class ?
    00:06
  • What are order of precedence and associativity, and how are they used ?
    00:05
  • What is the difference between inner class and nested class ?
    00:07
  • Difference between StringBuffer and StringBuilder
    00:03
  • this() Vs super()
    00:09
  • Can you use this() and super() both in a constructor ?
    00:05
  • Difference between flush() and close()
    00:10
  • What is anonymous inner class ?
    00:10
  • What is Classloader in Java ?
    00:06
  • Explain Annotation
    00:16
  • How many times does garbage collector calls the finalize() method for object ?
    00:03
  • Can the Garbage Collection be forced by any means ?
    00:06
  • Why java is not 100% Object Oriented ?
    00:04
  • Difference between a break statement and a continue statement
    00:05
  • Difference between equals and ==
    00:06
  • Difference between Comparable and Comparator
    00:17
  • What is Java instanceOf operator ?
    00:07
  • What is Synchronization ?
    00:24
  • What is the disadvantage of Synchronization ?
    00:08
  • Difference between Inheritance and Composition
    00:06
  • Difference between aggregation and composition
    00:06
  • What is Producer and Consumer problem ?
    00:46
  • Difference between Serializable and Externalizable interface
    00:19

  • Bonus Lecture
    00:26
  • Thank You...
    00:52

Instructor

Alfa e-Learning
16,000 students around the world with reach to 140 Countries
Alfa e-Learning
  • 4.0 Instructor Rating
  • 1,418 Reviews
  • 16,448 Students
  • 15 Courses

I always want to teach new things to students around the world. I believe that the more knowledge we share the more knowledge we gain.

I provide courses on Java, Spring, Hibernate, JPA, RabbitMQ, MongoDB (NoSQL), GraphQL, Pivotal Cloud Foundry.

Having 16,000+ students around the world with reach to 140 countries.

Enrol in the courses and boost your technical skills.

Happy Learning & Happy Coding.

  • Udemy for Business
  • Teach on Udemy
  • Get the app
  • About us
  • Contact us
  • Careers
  • Blog
  • Help and Support
  • Affiliate
  • Terms
  • Privacy policy
  • Cookie settings
  • Sitemap
  • Featured courses
Udemy
© 2021 Udemy, Inc.