Zensar Technologies Backend Java Developer Interview Questions and Answers

Q1. Tell me about your project
Ans. 
Developed a web-based inventory management system for a retail company.
• Used Java, Spring Boot, and MySQL for backend development.

• Implemented user authentication and authorization using Spring Security.

• Designed a responsive front-end using HTML, CSS, and JavaScript.

• Integrated barcode scanning functionality for efficient inventory tracking.
Answered by AI
Add your answer
Q2. Class vs object
Ans. 
A class is a blueprint or template for creating objects, while an object is an instance of a class.
• A class defines the properties and behaviors of objects, while an object is a specific instance of a class.

• Classes can be used to create multiple objects with similar characteristics.

• Objects have state (attributes) and behavior (methods) defined by the class.

• Example: Class 'Car' defines properties like 'color' and 'model'...read more
Answered by AI
Add your answer

Q1. Salary expectation
Add your answer
Q2. Date to join?
Add your answer

Q1. Chvvvv vvbbbbb isush shjshs jdudjdj
Add your answer
Q2. Vvvhjjjc hhhjVv hsudjsj hsudjsh hdhdh
Add your answer

Q1. Explain how hashmap internally works
Ans. 
HashMap internally uses an array of linked lists to store key-value pairs.
• HashMap uses hashing to determine the index of the key in the array.

• If multiple keys hash to the same index, a linked list is used to store them.

• When retrieving a value, the key is hashed to find the index and then the linked list is searched for the key.
Answered by AI
Add your answer
Q2. Difference between vector and Arraylist
Ans. 
Vector is synchronized and slower, ArrayList is unsynchronized and faster.
• Vector is synchronized, ArrayList is not.

• Vector is slower due to synchronization, ArrayList is faster.

• Vector is legacy class, ArrayList is part of Java Collections framework.

• Vector doubles its size when full, ArrayList increases by 50%.
Answered by AI
Add your answer

Aptitude questions and some questions from PostgreSQL.

Q1. Java fundamental questions?
Add your answer
Q2. Collection Framework.
Add your answer
Q3. 2-3 easy to medium Coding Questions.
Add your answer
Q4. Questions from Object oriented programming in Java?
Add your answer
Q5. Implementation of HashMap , LinkedList, HashSet, Heap?
Ans. 
HashMap, LinkedList, HashSet, and Heap are data structures commonly used in Java for storing and organizing data.
• HashMap: key-value pairs, uses hashing to store and retrieve elements efficiently (e.g. HashMap)

• LinkedList: linear data structure, elements are stored in nodes with pointers to the next node (e.g. LinkedList)

• HashSet: collection of unique elements, uses hashing to ensure uniqueness (e.g. Hash...read more
Answered by AI
Add your answer

Q1. What is Springboot
Ans. 
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
Answered by AI
Add your answer
Q2. Questions on kafka
Add your answer

Good coding questions related array and string

There were 2 coding questions

Q1. Java oops concepts, java 8 features, spring, DB related questions
Add your answer

Q1. Again technical questions also About company? Y bnp? Complex issues that u fixed..
Add your answer

Q1. HR discussion like salary and all
Add your answer