Kensium Solutions Developer Associate Interview Questions and Answers

Q1. Introduce yourself
Ans. 
I am a Java Developer with 5 years of experience in developing web applications using Java, Spring, and Hibernate.
• 5 years of experience in Java development

• Proficient in Spring and Hibernate frameworks

• Strong understanding of web application development
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Q2. Tell me about the project you worked on in your previous company and the role you played as part of the team and your day to day responsibilities as a Java Developer in the project
Ans. 
Developed a web-based inventory management system using Java, Spring, and Hibernate
• Designed and implemented database schema using Hibernate

• Developed RESTful APIs using Spring framework

• Worked on front-end development using HTML, CSS, and JavaScript

• Collaborated with team members to troubleshoot and resolve issues

• Participated in code reviews and testing
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Q3. What are Interfaces and Abstract classed in Java and code an example of an interface on Notepad
Ans. 
Interfaces and Abstract classes in Java are used for achieving abstraction and defining contracts for classes to implement.
• Interfaces in Java are like blueprints for classes, defining methods that must be implemented by classes that implement the interface.

• Abstract classes are classes that cannot be instantiated and can have both abstract and concrete methods.

• Example of an interface in Java: public interface Shape { ...read more
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Q4. You are given a string, name and an integer which is year of birth. You need to print the reverse of year of birth followed by the reverse of name.
Ans. 
Reverse the year of birth and name, then print them in that order.
• Reverse the year of birth using StringBuilder.reverse() method

• Reverse the name using StringBuilder.reverse() method

• Print the reversed year of birth followed by the reversed name
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Q5. What are Threads in Java
Ans. 
Threads in Java are lightweight sub-processes that allow concurrent execution within a single process.
• Threads allow multiple tasks to be executed simultaneously in a Java program.

• Threads share the same memory space and resources within a process.

• Example: Creating a new thread using the Thread class or implementing the Runnable interface.
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Q1. Explain briefly about your project at your previous company
Ans. 
Developed a web application for inventory management system using Java Spring framework
• Used Java Spring framework for backend development

• Implemented RESTful APIs for communication between frontend and backend

• Utilized MySQL database for storing inventory data
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Q2. Given a ArrayList of String containing some name with some name repeated. Write the code on a notepad printing only the single occurrence of each name in the ArrayList. iImplement the same using Java 8 Str...read more
Ans. 
Using Java 8 Streams API to print single occurrences of names in an ArrayList of Strings.
• Use stream() method on the ArrayList to create a stream of elements.

• Use filter() method to filter out elements that occur more than once.

• Use distinct() method to get only unique elements.

• Use forEach() method to print each unique element.
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Q3. Given a ArrayList of String containing some names with some repeated names. Write the code on a notepad printing each name and the number of occurrences of each name in the ArrayList
Ans. 
Code to print each name and the number of occurrences in an ArrayList of Strings.
• Iterate through the ArrayList and use a HashMap to store the count of each name.

• Print each name along with its count from the HashMap.
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Q4. What are lambda expressions in Java
Ans. 
Lambda expressions in Java are a concise way to represent anonymous functions.
• Lambda expressions are used to provide implementation of functional interfaces.

• They enable you to treat functionality as a method argument, or code as data.

• Syntax: (parameters) -> expression or (parameters) -> { statements; }

• Example: (int a, int b) -> a + b
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Q5. What are functional interfaces in Java
Ans. 
Functional interfaces in Java are interfaces with only one abstract method, used for lambda expressions and functional programming.
• Functional interfaces have only one abstract method, but can have multiple default or static methods.

• They are used for lambda expressions and functional programming in Java.

• Examples include java.lang.Runnable, java.util.Comparator, and java.util.function.Function.
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Q6. What are Streams in Java
Ans. 
Streams in Java are sequences of elements that support functional-style operations such as filter, map, reduce, etc.
• Streams are not data structures, but rather a way to interact with collections of objects.

• They allow for efficient processing of large amounts of data.

• Streams can be sequential or parallel, allowing for concurrent processing.

• Example: List names = Arrays.asList("Alice", "Bob", "Charlie"); Stream stream = n
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Q7. Do you have any questions for me
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Q1. Tell me about yourself
Ans. 
I am a Java Developer with 5 years of experience in developing web applications and implementing solutions using Java technologies.
• 5 years of experience in Java development

• Strong knowledge of web application development

• Experience in implementing solutions using Java technologies
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Q2. Few questions related to my education and my placements
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Q3. What was your CTC at your previous company
Ans. 
My previous CTC was confidential as per company policy.
• CTC was confidential as per company policy

• I am unable to disclose my previous CTC

• Previous CTC information is not available
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Q4. Do you have any questions for me
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Q1. What is runtime polymorphism, and can you provide a code example to illustrate it?
Ans. 
Runtime polymorphism allows a subclass to provide a specific implementation of a method that is already provided by its parent class.
• Runtime polymorphism is achieved through method overriding, where a subclass provides its own implementation of a method that is already defined in its superclass.

• The method to be overridden must have the same name, return type, and parameters in both the superclass and subclass.

• When an o...read more
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Q2. Streams in java
Ans. 
Streams in Java provide a way to process collections of objects in a functional style.
• Streams are sequences of elements that support various operations like filter, map, reduce, etc.

• They can be created from collections, arrays, or generate elements dynamically.

• Streams can be sequential or parallel, allowing for efficient processing of large datasets.

• Example: List<String> names = Arrays.asList("Alice", "Bob", "Cha...read more
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Q3. How do we create threads in Java, and how do we invoke them?
Ans. 
Threads in Java are created by extending the Thread class or implementing the Runnable interface, and invoked using the start() method.
• Threads can be created by extending the Thread class and overriding the run() method.

• Threads can also be created by implementing the Runnable interface and passing an instance of the class to a Thread object.

• Threads are invoked by calling the start() method on the Thread object.
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Q4. What is a Rest Template and how is it used?
Ans. 
Rest Template is a class in Spring that simplifies making HTTP requests and handling responses.
• Rest Template is part of the Spring framework in Java.

• It can be used to make HTTP requests to RESTful web services.

• It simplifies the process of making HTTP calls and handling responses.

• Rest Template can handle GET, POST, PUT, DELETE, etc. requests.

• Example: RestTemplate restTemplate = new RestTemplate();
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Group discussion was the first round on avg there were 15 people in a group discussion at last everyone was given a minute to speak

Q1. Tell me about yourself?
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Q2. Where do you see yourself in five years?
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Q3. Tell me about your family?
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Q4. Do you plan on Higher education?
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Q1. Questions on OOPs concept
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Q2. Sort the array by parity
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Q3. Write SQL queries
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Q4. Who wrote the book discovery of the nation
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Q5. What is the official language of kashmir
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Q6. Which city is called city of lakes
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Q1. Find the length of the longest word in the length
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Q2. Push the zeroes in the arrays to the end
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Q3. When was python launched
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Q4. What is name of ai from meta/google/amazon
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Q5. What do you do in your free time
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Q6. Tell me your pros and cons
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Q1. Oops concept asked
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Q2. Springboot annotations
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Q1. Project details simply
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Q2. Springboot related
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Q1. Easy about salary
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Q2. Details about asked
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Q1. About project? feature, integration with Third-Party
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Q2. Integration, How REST/SOAP APIs used for intergation
Ans. 
REST/SOAP APIs are used for integration by allowing communication between different systems over the internet.
• REST APIs use HTTP methods like GET, POST, PUT, DELETE for communication

• SOAP APIs use XML for message format and WSDL for describing services

• Both APIs facilitate data exchange between systems in a standardized way
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Very basic aptitude questions along with few coding questions

Q1. A problem statement was given and we had to provide an optimal approach to design and handle that problem
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Q2. Oops concepts, SQL queries
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Q1. Fundamental of javaScript
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Q2. Fundamentals of React
Ans. 
React is a JavaScript library for building user interfaces.
• React allows developers to create reusable UI components.

• It uses a virtual DOM for efficient rendering.

• React uses JSX, a syntax extension that allows mixing HTML with JavaScript.

• State and props are used to manage data and pass information between components.
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App was given to create

Q1. Project details currently I am working
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Q2. Also fundamental question regarding Outsystems.
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