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Get your Java dream job! Beginners interview preparation

Learn Java Fundamentals, Object Oriented, Arrays, Collections, Maps and Solve puzzles to win Java interview questions!

Created byYuval Ishay

Last updated 9/2021

English

What you'll learn

You will answer many Java interview questions more correctly and accurately
Cope professional java interview with more confidence
You will achieve better understanding in the Java topics learned in the course.

Course content

10 sections • 85 lectures • 6h 29m total length

Welcome!3:52
Welcome to the JAVA Junior Interview Preparation course!
Course Overview3:24
After taking this lesson you will be able to understand the structure of the course and its main topics.

Java Installation4:57
After taking this lesson you will have a Java installation on your computer and you will be able to answer one of the most popular interview question!
Eclipse Installation3:59
After taking this lesson you will have eclipse installed on your computer.
Learning material Installation5:35
After taking this lesson you will have all the course learning material installed on your computer and you will be ready to get started with the course!

String Questions - Intro1:39
Introduction to the next lesson about String question and answers,
Java String Basic Questions1:50
Java strings are a regular class in the java.lang package, not primitive, and they inherit from Object. Learn key methods like substring and explore the JDK source for deeper understanding.
Understanding String Pool4:28
After taking this lesson you will be able to answer interview question related to String Pool.
String Pool - cont2:16
After taking this lesson you will be able to answer interview question related to String Pool.
Immutable Objects Questions6:35
This lecture explains what is Immutable object, how to create them with sample.
After this lecture you will be able to answer interview questions related to immutable objects.
StringBuffer And StringBuilder Questions6:41
This lecture explains about the pros & cons of immutable String object and how can a programmer overcome them using StringBuffer and StringBuilder.
It also explain the differences between StringBuffer and StringBuilder.
toString() method Questions5:00
This lecture explains about the toSting method, and how to write a correct implementation of it.
String Questions - Wrap-up1:50
In this section we cover many very popular and basic questions related to String.

String is one of the most widely used Java Class, and as so, most of the beginner interview questions will include some questions related to Strings. If you learn this part well, you should have one or two good answers in your hand.
String Questions - Quiz
Auto Boxing Questions8:48
This lecture explains about the Auto Boxing feature and cover some related interview questions
What are the defaults?2:20
This lecture explains what are the default of object member variables
AutoBoxing and Defaults Quiz
Tricky questions about constructors - part 15:40
After taking this lesson you will be able to answer constructors' related questions with a great confidence.

*First lecture out of three.
Tricky questions about constructors - part 23:05
After taking this lesson you will be able to answer constructors' related questions with a great confidence.

*Second lecture out of three.
Tricky questions about constructors - part 36:28
After taking this lesson you will be able to answer constructors' related questions with a great confidence.

*Third lecture out of three.
Constructors - Quiz
Garbage Collection Questions4:29
Garbage collection is an important part of any Java interview so make sure you understand the basic of it well so you will be able to give answers with confidence.
Garbage Collection - In Action3:00
In this lecture, I would like to show one short code sample in order to see the Garbage Collector in action.
Garbage Collection Quiz
Exceptions Theory and Syntax5:35
After taking this lesson you will be able to answer few of the most popular questions related to exceptions.
Exceptions - In Action5:51
In this lesson we are going to see a code sample which will take the theory we learned in the previous lesson into practice.
Exceptions Quiz
Fundamental Section Wrap up1:21
This is a wrap-up for the Fundamental Java Question section.

Object Oriented - Intro1:37
Introduction to Object Oriented section.
What is Encapsulation?4:55
One of the first question in an interview can be what is Encapsulation? This is an abstract question, which is trying to understand if you understand the concepts of Object Oriented programming language.

After taking this lesson you will be able to better understand encapsulation.
What is encapsulation? - Code Sample5:34
After taking this lesson you will be able to better understand encapsulation.
Inheritance Basic4:06
In this lesson we are going to start talking about inheritance, which is one of the Object Oriented basic concepts and have a potential to a very confusing interview questions.
Inheritance Basic - Interview Questions3:50
After taking this lesson you will be able to answer inheritance basic interview questions.
What is Polymorphism?4:54
After taking this lesson you will be able to understand what is static and dynamic polymorphism
and what is static and dynamic binding.
What is Abstraction?5:56
Abstraction is the last basic concept of Java Object Oriented and is very important to understand because it is in massive use in the Java core library and in every code that you will see.
After taking this lesson you will be able to understand the idea of abstraction and how java implements it using interfaces.
Object Oriented Concepts Quiz
Default Method in Java 86:49
From Java 8, we can have default methods and static methods in the interfaces.

In this lesson we will talk about "default" method in interface and cover some interview questions related to it.
Overriding vs Hiding Methods6:27
In this lesson I will focus on Overriding methods VS Hiding them.

We will talk about the private and static key words and how they behave in inheritance.
Overriding VS Hiding Quiz
Understanding Access Modifiers5:58
As you probably know, Java has four access modifiers: private, package, protected and public.
These access modifiers are used to restrict accessibility of a class, method or variable on which it applies.
After taking this lesson you will understand access modifiers and will be able to answer interview question related to it.
Access Modifier Quiz
Final and Inheritance Questions3:00
After taking this lesson you will be able to understand the usage of the final modifier in the context of inheritance.
Final Modifier and Inheritance Quiz
Abstract Classes4:55
Theoretical questions about Abstract Classes.4:11
After taking this lesson you will be able to answer some popular theoretical interview questions related to abstract classes.

These questions will check your understanding of abstraction concept, and your experience using interfaces and abstract classes.
Tricky questions about Abstract Classes.4:26
After taking this lesson you will be able to answer some popular interview questions related to abstract classes.
Abstract Classes Quiz
What is marker interface?4:25
"What is the marker interface?" – This question is one of the repeated interview questions.
After taking this lesson you will be able to answer it very well.
Object Oriented - Wrap-up1:17
Wrap up of the Object Oriented section.

Collection Framework - What is it?6:03
List interface4:51
ArrayList Theory and Interview questions5:54
ArrayList Demo - Basic5:46
ArrayList Demo - Using Indexes6:24
Explore ArrayList behavior with indexes: adding and removing elements shifts subsequent items, causing potential performance impacts; understand how size updates and list growth occur when inserting at specific positions.
ArrayList - Dynamic Resizing Questions6:34
ArrayList VS Vector3:07
Why should we use Iterator?5:18
ArrayList Quiz

Puzzles Section - Intro1:48
Introduction to Puzzle section.
How to Reverse a String?7:32
The question "How to reverse a String?" is one of the popular interview questions and it is asked mainly in junior interview.

This question has a potential to check your knowledge in the reach API java has for String and also your ability to think logically, clearly and write code without bugs and in efficient way.

In the lesson will review some of the possible solution for this question and give some valuable tips for coming prepared to interview.
How to reverse a String effectively?5:00
The question "How to reverse a String?" is one of the popular interview questions and it is asked mainly in junior interview.

This question has a potential to check your knowledge in the Reach Api java has for String and also your ability to think logically, clearly and write code without bugs and in efficient way.

In this lesson, we will see how to do it effectively using the char array representation of a String.
How to reverse a String with recursion?6:00
In this lesson, we will see how to reverse a String using recursion.

Since recursion is a tricky concept and not many Java developers can think recursive as compared to C++ developers for example, you may see many of Java programmer stuck here...

So it's better to prepare in advance and get ready for this kind of questions.
How to check if strings are Anagram?3:36
After taking this lesson you will be ready to answer the question:
How can I find if two Strings are Anagram of each other?
How to check if strings are Anagram? - by checking off4:03
After taking this lesson you will have a first solution to the puzzle: "How to check if Strings are anagram?"
how to check if strings are Anagram? - by removing chars3:37
After taking this lesson you will have a second solution to the puzzle: "How to check if Strings are anagram?"
How to check if strings are Anagram? - by sorting3:12
After taking this lesson you will have a third and a better solution to the puzzle: "How to check if Strings are anagram?"
How to check if strings are Anagram? - by counting letters6:32
After taking this lesson you will have the best solution to the puzzle: "How to check if Strings are anagram?"
How to check if strings are Anagram? - Wrap Up2:39
How can I find prime numbers?4:09
The question "How to find a prime number?" is one of the popular interview questions and it is asked mainly in junior interview.

In the lesson we will review one solution for this question and give some valuable tips for coming prepared to interview.
How to Reverse a Number?6:48
The question "How to reverse number?" is another popular interview questions and it is asked mainly in junior interview.

In the lesson we will review one solution for this question and give some valuable tips for coming prepared to interview.
What is wrong with this code -15:52
In this lessons we will solve another type of interview question.

I call them "What is wrong" puzzle.

In this kind of puzzles the interviewer can present some code and might ask you "What is wrong with this code" or "How can you improve this code?" kind of question.

These kinds of questions are usually checking your Java language knowledge and the experience you have accumulated in your studies or project you have already done and how you bring them into practice....
What is wrong with this code - 24:28
In this lesson we will solve another "What is wrong" interview question, related to constructor and inheritance.
Puzzle Section Wrap-up1:30
Wrap up of the puzzle section.

Interview process - intro.5:01
Phone interview4:08
Learn to ace a phone interview with thorough preparation, a quiet space, note-taking, and research about the company, the role, and the team during a 30–60 minute screening.
Computer interview - at home5:11
Technical written interview - at office5:05
Computer interview - at office3:02
Face to Face interview7:58
Prepare for a face-to-face interview by reviewing the job-specific action page for languages, technologies, and frameworks, and by showing curiosity and a willingness to learn.
Human resource interview2:47
Making a decision!2:25
After interviews, confirm the role fits your goals; if still unsure, keep looking. If you accept, negotiate salary and benefits within market ranges, then sign the contract and start.
Interview process wrap-up2:20

What Next?2:27
Engage with real-life interview practice by tackling Java basics and over 250 questions, using quizzes and puzzles to build confidence, honesty, and problem-solving for job interviews.
Course Wrap-Up - Thank you!3:14
Master core Java concepts and over 250 interview questions to boost your confidence for your dream Java job. Engage the course dashboard and apply your learning to interviews.

Requirements

Basic knowledge in Java
Basic knowledge in Eclipse IDE

Description

Hello and Welcome!

Scared of coding interview?

This course will practice you with the must know Java interview questions.

In addition it will also prepare you to crack Java puzzle pattern. If you can learn the pattern, you can beat coding interview!

If you want to get your dream job, and you are serious about your career you should take this course.

In this course we will review Java interview questions from different areas:

Java Fundamentals – String, exceptions, autoboxing, garbage collectors and more.
Arrays - advantages and disadvantages, initialization, search, sort, puzzle.
Object Oriented Concepts - encapsulation, polymorphism, inheritance and abstraction. More practically we will discuss inheritance, interface and abstract classes, access modifier, overriding vs Hiding, marker interface and much more.
Collections - Framework overview, List, ArrayList, Vector, Iterator.
Maps - Map interface, HashMap, Hashtable
Puzzles - Programming puzzles and "What wrong with this code?" questions are frequently asked in software programming Interviews in order to check your knowledge, your logical thinking and how strong and clear your mind is.
Interview process - Improve your soft skills and understand the interview process that you are going to pass.

Lesson structure

The lecture were divided to short lectures of about 5 min each, so you will be able to come back to a specific topic and replay the lesson without the need to search in a specific long video for the part that you would like to repeat on.

Each lesson will include several questions; all of them are from real interviews. We'll go over the questions and answer them.

Quiz

Summarizing each few classes there will be a quiz, designed to repeat the material and help the student understand it even better.

Who this course is for:

A student to beginner developer who want to get a job as Java developer

Get your Java dream job! Beginners interview preparation

What you'll learn

Explore related topics

Course content

Welcome!2 lectures • 7min

Installation3 lectures • 15min

Fundamental Java Question18 lectures • 1hr 17min

Arrays Questions6 lectures • 32min

Object Oriented Concepts and Questions16 lectures • 1hr 12min

Collection Questions8 lectures • 44min

Maps6 lectures • 32min

Java Puzzles15 lectures • 1hr 7min

Interview process9 lectures • 38min

Wrap-up2 lectures • 6min

Requirements

Description

Who this course is for: