Sunday, January 29, 2023

Java Full Stack Interview Questions

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Why Are You Interested In Full

Full Stack Developer Interview Questions 2022 | Web Development Interview Questions | Simplilearn

Interviewers want to hire candidates who are passionate about their job. They may ask this question to find out what interests you about full-stack development. When answering this question, explain why you chose to become a full-stack developer. Emphasise your interest in the field.

Answer: “I enjoy managing both the front-end and back-end aspects of applications. Being a full-stack developer allows me to design end-to-end solutions and handle an application’s user interaction and server management. I am also interested in managing other essential aspects, such as networks, servers, hosting and optimisation. As part of my learning, I am exploring newer frameworks that help optimise applications running on tablets. I am also learning to write user documentation by taking a few online courses.

I am also proficient in UI/UX design, allowing me to incorporate my creativity into the products I design. I focus on designing applications that are meaningful and fulfil the user’s needs. For example, in my previous role as a full-stack developer, I developed an application for schools that helps children learn new concepts through interactive stories, animations and games. Several schools have been using this application as part of their course. Teachers can use this application to create interactive lessons using drag-and-drop functionalities, voice recordings and custom avatars. This has made learning more enjoyable.”

Related: How To Become A Full-Stack Developer In 7 Steps

What Is Dependency Injection

Dependency Injection is a design pattern by which IoC is executed. Injecting objects or connecting objects with other objects is done by container instead of by the object themselves. It involves three types of classes.

  • Client class: It depends on the service class.
  • Service class: It provides service to the client class.
  • Injector class: It injects service class objects into the client class.

Q3 What Is Abstraction In Java

Abstraction refers to the quality of dealing with ideas rather than events. It basically deals with hiding the details and showing the essential things to the user. Thus you can say that abstraction in Java is the process of hiding the implementation details from the user and revealing only the functionality to them. Abstraction can be achieved in two ways:

  • Abstract Classes
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    What Are The Skills Required To Crack Full Stack Development Interview Questions

    Before we get into full stack developer interview questions, letâs quickly go over what full stack development means. Full stack development includes simultaneously developing the frontend and backend of web applications. This process involves three layers:

    • Presentation layer
    • Business logic layer

    Full stack developers or engineers can code on both the front end and the backend . As a full stack developer, you are expected to know the âfull stackâ of technology, i.e., they can develop software for both the user and service provider. You should also be skilled at Java, JavaScript, HTML, C++, etc., to develop applications, and know how to program browsers, servers, and databases.

    The following skills are essential to ace full stack developer interview questions:

    • Competency in HTML, CSS, SQL, etc.
    • Front-end Frameworks: BootStrap, AngularJS, VueJS, ReactJS, Ruby, JavaScript, TypeScript, Python, and PHP.
    • Backend Frameworks: Express, NodeJS, Django, Ruby on Rails
    • Databases: MySQL, SQLite, Postgres, MongoDB, Sphinx, Cassandra, Apache storm.
    • Auxiliary Skills: Git, Machine Learning, SSH, Data Structures, Linux Command, Character encoding.

    Q 59 Explain The Different Authentications In Java Servlets

    Interview Questions Tech Stack

    Authentication options are available in Servlets: There are four different options for authentication in servlet:

    • Basic Authentication:

    Usernames and passwords are given by the client to authenticate the user.

    • Form-based authentication:

    In this, the login form is made by the programmer by using HTML.

    • Digest Authentication:

    It is similar to basic authentication, but the passwords are encrypted using the Hash formula. Hash Formula makes digest more secure.

    • Client certificate Authentication:

    It requires that each client accessing the resource has a certificate that it sends to authenticate itself. Client Authentication requires the SSL protocol.

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    By Default Angular Uses Client

    Yes, it is possible to make an Angular application to render on the server-side. Angular provides a technology called Angular Universal that can be used to render applications on the server-side.

    The crucial advantages of using Angular Universal are as follows:

    • Making an Angular application render on the server-side can provide a better user experience. By using this, first-time users can instantly see a view of the application. So, it can be used to provide better UI.
    • It can lead to a better SEO for your application. The reason is that many search engines expect pages in plain HTML. So, Angular Universal can ensure that your content is available on every search engine, and it is good for better SEO.
    • The server-side rendered applications load faster than normal pages. It is because the rendered pages are available to the browser sooner.

    Questions About Developer Experience And Background

    After learning more about your personality and traits, an interviewer might ask questions about your professional experience and background to determine whether you are qualified for the role. Here are some examples of questions relating to your programming background:

    • Describe your favorite project that you’ve worked on.

    • What experience do you have working as a full stack developer?

    • What was the most difficult coding challenge that you’ve experienced?

    • How do you proceed when you notice a colleague made a coding error?

    • How do you code when SEO is a priority?

    • Do you prefer a technical coding role or a managerial position?

    • Explain a time you debugged a challenging program.

    • How has your experience prepared you for this position?

    • In what ways has your education prepared you for this role?

    • Do you have any technical certifications?

    • What type of projects have you worked on?

    • How do you manage multiple projects at the same time?

    • What coding have you completed outside of work?

    Read more:Web Developer Skills: Definitions and Examples

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    What Are The Main Differences Between Graphql And Rest

    Here are the main differences between GraphQL and REST:

    • REST is an architectural style that places a set of constraints on how web applications are built. GraphQL is a server-side technology used to obtain data by executing queries.
    • REST is executed using a series of endpoints whereas GraphQL takes the form of a schema.
    • GraphQL mutations need to be in the string message format. There are no restrictions on the message format for REST mutations.

    What Is The Biggest Mistake You Made In Any Of Your Projects How Did You Rectify It

    Full Stack Developer with Java and Angular Interview Questions| Spring Boot with Angular Interview

    Recruiters want to see that you have the ability to admit your mistakes and rectify them. So dont forget to mention how you went about making amends.

    Here are a few things you can do to rectify the mistakes you make at work:

    • Review all the code you produce
    • Let a manager know if youve committed any major errors
    • Ask a more senior colleague to supervise your corrections
    • Admit when you make a mistake and ask for help if you need it

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    What Is Cors In Mvc And How It Works

    CORS stands for Cross-Origin Resource Sharing. It is a W3C standard and HTTP-header-based mechanism. It permits a server to indicate any other origins instead of the requested one. In other words, it enables one website to access the resources of another website using JavaScript.

    It supports secure cross-origin requests and transfers data between servers and browsers. Advanced browsers use CORS in APIs. It is flexible and safe in comparison to JSONP . It provides better web service integration.

    While using the MVC to enable CORS, the same CORS service can be used but we cannot use the same CORS middleware. We can use a particular CORS for a particular action, for a particular controller, and globally for all controllers.

    A pre-flight check is sent by the browser to the server which ensures that the server will permit the actual request or not. For example, invoking the URL through .

    Q48 What Is Event Bubbling And Capturing In Javascript

    Ans Event Bubbling and Event Capturing are the ways of the event propagation in the HTML API when an event occurs in an element that is located inside the other part and both the parts have registered a handle with the recently happened event.

    Here the event propagation model identifies that in which order the elements receive the event.

    In the case of Event Bubbling, the event is first captured and also handled by the innermost element, and then the event is propagated to the outermost element.

    In the case of Event Capturing, the event is first captured and also handled by the outermost element, and then the event is propagated to the innermost element.

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    Q4 What Is Data Encapsulation And Whats Its Significance

    Ans: Encapsulation is a concept in Object Oriented Programming for combining properties and methods in a single unit.

    Encapsulation helps programmers to follow a modular approach for software development as each object has its own set of methods and variables and serves its functions independent of other objects. Encapsulation also serves data hiding purpose.

    What Is Your Favourite Language And Why

    Java for Full Stack Development

    Ans: Full Stack Web Developers work with a multitude of languages. Having just one loved coding language might be an alarm signal. Ideally, a candidate must have a few languages that he loves, preferably, some with which he can design the front end and others with which he can take care of the back end. A candidate should be able to demonstrate that well and remember to include the basic most used ones like HTML, CSS, Python etc.

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    Q5 Explain The Role Of Dispatcherservlet And Contextloaderlistener

    DispatcherServlet is basically the front controller in the Spring MVC application as it loads the spring bean configuration file and initializes all the beans that have been configured. If annotations are enabled, it also scans the packages to configure any bean annotated with @Component, @Controller, @Repository or @Service annotations.

    ContextLoaderListener, on the other hand, is the listener to start up and shut down the WebApplicationContext in Spring root. Some of its important functions includes tying up the lifecycle of Application Context to the lifecycle of the ServletContext and automating the creation of ApplicationContext.

    Q 53 What Are The Observer And Observable Classes

    Objects that inherit the “Observable class” take care of a list of “observers.”

    When an Observable object gets upgraded, it calls the update method of each of its observers.

    After that, it notifies all the observers that there is a change of state.

    The Observer interface gets implemented by objects that observe Observable objects.

    Free Course: JavaScript for Beginners

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    Q 2 List The Features Of The Java Programming Language

    A few of the significant features of Java Programming Language are:

    Easy: Java is a language that is considered easy to learn. One fundamental concept of OOP Java has a catch to understand.

    Secured Feature: Java has a secured feature that helps develop a virus-free and tamper-free system for the users.

    OOP: OOP stands for Object-Oriented Programming language. OOP signifies that, in Java, everything is considered an object.

    Independent Platform: Java is not compiled into a platform-specific machine instead, it is compiled into platform-independent bytecode. This code is interpreted by the Virtual Machine on which the platform runs.

    Full Stack Java Developer Course

    Q20 Does Importing A Package Imports Its Sub

    Cognizant | Full Stack Developer | Real-time Java Interview Series | interview 28

    Ans: In java, when a package is imported, its sub-packages arent imported and developer needs to import them separately if required.

    For example, if a developer imports a package university.*, all classes in the package named university are loaded but no classes from the sub-package are loaded. To load the classes from its sub-package , developer has to import it explicitly as follows:

    Import university.department.*

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    Q47 Can We Have Two Methods In A Class With The Same Name

    Ans: We can define two methods in a class with the same name but with different number/type of parameters. Which method is to get invoked will depend upon the parameters passed.

    For example in the class below we have two print methods with same name but different parameters. Depending upon the parameters, appropriate one will be called:

    public class methodExample     public void print     public static void main }

    What Are Some Of The Challenges Of Working In Full

    Full-stack developers take on both front- and back-end programming tasks, and the interviewer understands that these functions can be challenging. Demonstrate your ability to take on challenges on the job and give examples of how you’ve solved problems you’ve faced in the past.

    Example:”Because full-stack development requires a diverse range of programming, coding and data analysis skills, it can be challenging to delve deeper into specific aspects of the field. I typically have to rely on my IT team’s unique specialties in addition to my oversight and programming integration to develop applications with quick turnarounds.”

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    Q37 What Are The Two Ways Of Implementing Multi

    Ans: Multi threaded applications can be developed in Java by using any of the following two methodologies:

    1) By using Java.Lang.Runnable Interface. Classes implement this interface to enable multi threading. There is a Run method in this interface which is implemented.

    2) By writing a class that extend Java.Lang.Thread class.

    Q21 What Are The Different Types Of Garbage Collectors In Java

    Full TIme / Contract :: Immediate Interview:: Java Full Stack Developer ...

    Garbage collection in Java a program which helps in implicit memory management. Since in Java, using the new keyword you can create objects dynamically, which once created will consume some memory. Once the job is done and there are no more references left to the object, Java using garbage collection destroys the object and relieves the memory occupied by it. Java provides four types of garbage collectors:

    • Serial Garbage Collector

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    Q12 When Should You Not Use Arrow Functions In Es6 Name Three Or More Cases

    Ans- Arrow functions should NOT be used:

  • When we want function hoisting as arrow functions are anonymous.
  • When we want to use this/argument in a function as arrow functions do not have this/argument of their own, they depend upon their outer context.
  • When we want to use named function arrow functions are anonymous.
  • When we want to use the function as a constructor as arrow functions do not have their own this.
  • When we want to add function as a property in object literal and use an object in it as we can not access this .
  • What Coding Have You Completed Outside Of Work

    Personal projects evince your interest in building applications from end to end. You can mention any projects that youve built and the languages that you used to complete them.

    You can also mention contributions that youve made to open source projects. There are a few different ways you can get involved in open-source projects and can include them in your portfolio.

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    How To Nail Your Next Tech Interview

    The demand for Full Stack Developers is growing. If you wish to make your career as a full stack developer at FAANG, you should know commonly asked Full Stack Developer interview questions.

    To be able to outperform the competition, your interview prep has to be extensive. And thatâs why we have compiled a list of frequently asked full stack interview questions and answers that will help you to boost your tech interview prep.

    Having trained over 9,000 software engineers and developers, we know what it takes to crack the toughest tech interview questions at FAANG and other tier-1 tech companies.

    At Interview Kickstart, you get the opportunity to learn from industry experts who are recruiters and tech leads at FAANG+ companies. Our alums consistently land offers from FAANG+ companies, with an average salary hike of 49%!

    Join Our Free Webinar to learn how to crack FAANG Interviews.

    In this article, our focus will be on covering the most common full stack interview questions asked at FAANG and other top tech companies.

    Hereâs what weâll cover:

    • Skills Required to Crack Full Stack Development Interview Questions
    • Top Full Stack Web Developer Interview Questions and Answers
    • Sample Full Stack Developer Interview Questions
    • Sample Full Stack Developer Interview Questions on Java
    • FAQs on Full Stack Developer Interview Questions

    Ques 4 List Differences Between Post And Get

    Full stack developer interview questions and answers – Part 1 | ARC Tutorials

    Difference java full stack interview questions are highly prevalent. POST and GET difference is a part of almost all interview questions for full stack java developers.

    • GET helps in data recovery, and POST helps in writing data.
    • You can bookmark GET, but not POST.
    • GET has the request parameter in the URL string, but POST carries it in the message body.

    Let us move ahead to other java full stack developer interview questions.

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    Q41 How We Can Execute Any Code Even Before Main Method

    Ans: If we want to execute any statements before even creation of objects at load time of class, we can use a static block of code in the class. Any statements inside this static block of code will get executed once at the time of loading the class even before creation of objects in the main method.

    Ques 9 Mention One Of The Latest Things Learned By You In This Field

    Interviewers ask communication-based questions to authenticate the credibility of your CV. In addition, with these full stack java interview questions, the interviewer tries to assess whether you keep up with the latest trends or not.

    So, in response to such full stack JavaScript developer interview questions, you can say the projects or assignments you worked on, the bugs you experienced, and how you resolved them.

    Further, explain the websites you use to learn about the latest trends and things.

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