Interview questions for Full stock developer

Full-stack developers are skilled programmers who can work with both the front-end and back end of a website and applications. They are responsible for developing and designing front/ back ends web architecture, server-side applications, design databases, server-side applications, and much more.
It is the reason why tech giants hiring full-stack developers and conducting interviews for the same. You can increase your chance to get hire by companies if you have well prepared for the full stack developer interview. In this section, we have collected some full-stack developer interview questionsthat can help you to crack the interview to get your dream job

1. What are MVC and MVP and how MVC is different from MVP?

MVC and MVP both are architectural patterns that are used to develop applications.
MVC
MVC stands for Model View Controller. It is an architectural pattern that is used to develop Java Enterprise Applications. It splits an application into three logical components i.e. Model, View, andController. It separates the business-specific logic (Model component) from the presentation layer (View component) from each other.
The model components contain data and logic related to it. The View component is responsible for displaying model objects inside the user interface. The Controller receives the input and calls model objects based on handler mapping. It also passes model objects to views in order to display output inside the view layer.

2. How to enhance a website’s scalability and efficiency?

We can use the following ways to optimize the scalability and efficiency of a website:
o Reducing DNS lookup
o Avoiding URL redirects
o Avoiding duplicate codes
o Avoiding unnecessary images
o Leveraging browser caching
o Deferring parsing of JavaScript
o Avoiding inline JavaScript and CSS
o Using srcset for responsive images
o Placing all assets on a cookie-free domain, preferably using a CDN.

3. Can you differentiate between J2SDK 1.5 and J2SDK 5.0?

There is really no difference between J2SDK 1.5 and J2SDK 5.0. The versions have been rebranded by Sun Microsystems.

4. What are the key elements of the Java programming language?

This is the type of question an interviewer will use to begin the conversation, learn more about your background, and collect information they can use throughout the interview. This question also provides you the opportunity to direct the interview towards a subject area that you are familiar with and comfortable responding to questions about. Throughout the interview, keep your answers brief and to the point. This will encourage the interviewer to ask follow-up questions about the same topic or move on to a new subject

5 What is the number of bits used to represent ASCII, Unicode, the UTF-16, and the UTF-8 characters?

Unicode requires 16 bits.
ASCII requires 7 bits – however, it is usually represented as 8 bits.
UTF-8 presents characters in 8, 16, and 18 digit patterns.
UTF-16 requires 16 bit or larger patterns.
#3 Is it possible to import the same package or class twice? Will the JVM load the package twice at runtime?
Your answer: It is possible to import the same package or class more than once. It will not have any effect on the compiler or JVM. The JVM will load the class more than once, irrespective of the number of times you import the same class.

6.  How are access modifiers in used Java?

Technical questions asked in this fashion are requesting that you describe how a concept or process is used when programming in Java. When answering this type of question, you may want a skip defining the concept and simply state how it is used. You can still provide an example if this helps clarify your answer. Make sure to keep your answer brief and to the point. The interviewer will ask a follow-up question if they need additional information.

7. IS JVM an overhead?

No and Yes. JVM is an extra layer that translates Byte code into Machine code. Java provides an additional layer of translating the Source code when compared to languages like C.
C++ Compiler – Source Code -> Machine Code
Java Compiler – Source Code -> Machine Code
JVM – Byte Code -> Machine Code
Though it looks like an overhead, this additional translational allows Java to run Apps on all platforms since JVM provides the translation to Machine code as per the underlying Operating System.

8. What is RESTful API?

The term REST stands for Representational State Transfer. It is an architectural style that is used to createWeb Services. It uses HTTP requests to access and use the data. We can create, update, read, and delete data.
An API (Application Program Interface) for a website is the code that allows two software programs to communicate with each other. It allows us to write requesting services from an operating system or other application.

9. What is a marker interface, and how do you use it when writing Java code?

The fact that this is a technical question is obvious since it asks you to define a term and then discuss how it is used. Make sure you answer each part of the question in the order asked. This will help the interviewer follow your answer and confirm that you are listening to their questions during the interview.

10. Within Java, what are the differences between path and classpath variables?

This is a common format of a technical question. Technical questions ask you about concepts or items related to the work you do. They sometimes ask you to compare similar concepts or to describe how they are used. When answering technical questions using this format, you should first define the terms you were asked about. You then either compare them or describe how they are used. You may provide an example if it helps illustrate your answer.

There are two objects – a and b – with the same hashcode. I will insert two objects inside the hashmap.
hMap.put(a,a);
hMap.put(b,b);
where a.hashCode()==b.hashCode()

11. In your opinion, Is Java Pass By Value or Pass By Reference?

You may note that this question asks you for your opinion, even though it is technical. Not all technical questions have finite answers. Some may be relevant to the work you do or the type of experience you have writing programs. It is okay to state an opinion about a topic as long as you can support your answer. When asked a question of this type, you can anticipate follow-up questions asking why you believe this to be the right answer

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