InnoEye Technologies Java Developer Interview Questions and Answers for Freshers

Q1. 1 question on merge sort, 1 question on SQL queries, oops concepts in depth with real-life examples, core java concepts in depth, collection framework.
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Q2. Merge 2 sorted arrays,
Ans. 
Merge 2 sorted arrays into a single sorted array.
• Create a new array with the combined length of the two input arrays

• Use two pointers to iterate through the two arrays and compare elements to merge them into the new array

• Handle cases where one array is longer than the other
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Q3. Find the top salary of a department
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Q4. 4 pillars of oops
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Encapsulation, Inheritance, Polymorphism, Abstraction are the 4 pillars of OOPs
• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: Class in Java

• Inheritance: Ability of a class to inherit properties and behavior from another class. Example: Parent and Child classes

• Polymorphism: Ability to present the same interface for different data types. Example: Method overloading and overr...read more
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There was pattern question in any programming language and you have make the pattern dynamic.

Basically aptitude test is completely based on core java concepts

Q1. What is java What are the features of java What is try and catch block What is mean by static What is the difference between arraylist and hashet
Ans. 
Java is a high-level, object-oriented programming language used for developing applications.
• Java features include platform independence, automatic memory management, and exception handling.

• Try and catch blocks are used for handling exceptions in Java.

• Static is a keyword used to create class-level variables and methods.

• ArrayList is a dynamic array that can grow and shrink in size, while HashSet is a collection that does
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Q1. What are steps of involved in jdbc?
Ans. 
JDBC involves steps like loading driver, establishing connection, creating statement, executing query and handling results.
• Load the JDBC driver using Class.forName() method

• Establish a connection to the database using DriverManager.getConnection() method

• Create a statement object using the connection.createStatement() method

• Execute the query using statement.executeQuery() method

• Handle the results using ResultSet object
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Q1. Question related to multithreading, jsp ,servlet and jdbc
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Q2. Brush up basic java programming
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This is the second round and i was eliminated from this round

Q1. What is Spring beans
Ans. 
Spring beans are Java objects managed by the Spring IoC container.
• Spring beans are defined in the Spring configuration file using XML or annotations.

• They are instantiated, assembled, and managed by the Spring IoC container.

• Beans can be singleton, prototype, request, session, or custom scoped.

• Dependency injection is used to inject dependencies into Spring beans.
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Q2. What is Spring boot
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Spring Boot is a framework that simplifies the development of Java applications by providing pre-configured settings and tools.
• Spring Boot eliminates the need for manual configuration by providing defaults for most settings.

• It allows developers to quickly set up and run standalone Spring-based applications.

• Spring Boot includes embedded servers like Tomcat, Jetty, or Undertow for easy deployment.

• It promotes convention o...read more
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Q1. Spring Initializer
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Q2. I you do not use Spring Initializer is it possible to create a Spring boot application?
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