Virtual Galaxy Infotech Java Developer Interview Questions and Answers

It was Machine test, i had to make a project and connect it to Database and submit details in database table from form.

Q1. Technical verbal Interview, question were related to JavaScript, Json, JQuery, and how to perform click and other event on click, on change etc, and how to get text content entered in text box, mostly rel...read more
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Q2. What is Collection Framework?
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Collection Framework is a unified architecture for representing and manipulating collections of objects in Java.
• It provides interfaces (List, Set, Queue, etc.) and classes (ArrayList, HashSet, PriorityQueue, etc.) to store and manipulate groups of objects.

• Collections can be easily sorted, searched, and iterated using methods provided by the Collection Framework.

• Example: ArrayList is a class that implements the List int...read more
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Q3. What is RestApi?
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RestApi is a set of rules and conventions for building and interacting with web services using HTTP methods.
• RestApi stands for Representational State Transfer Application Programming Interface.

• It allows communication between different software systems over the internet.

• RestApi uses standard HTTP methods like GET, POST, PUT, DELETE for data manipulation.

• JSON or XML formats are commonly used for data exchange in RestApi.

• ...read more
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Q4. How to add one ArrayList object to another, which method is used to achieve this. Ans:- By using addAll() Method
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The addAll() method is used to add all elements of one ArrayList to another.
• Use the addAll() method to add all elements of one ArrayList to another

• Syntax: list1.addAll(list2);

• Example: ArrayList list1 = new ArrayList<>(); list1.addAll(Arrays.asList(1, 2, 3));
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Q1. Just Introduction
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