Aeries Technology Java Developer Interview Questions and Answers

Q1. Springboot related
Add your answer
Q2. MySql questions
Add your answer

Q1. Coding questions on java 8
Add your answer
Q2. Previous Project
Add your answer

Q1. Mostly quests from core java
Add your answer
Q2. How to use microservices
Ans. 
Microservices are a software development technique where an application is composed of small, independently deployable services.
• Break down the application into smaller, loosely coupled services that can be developed, deployed, and scaled independently.

• Use APIs to allow communication between microservices.

• Implement fault tolerance and monitoring to ensure the reliability of the system.

• Use containerization technologies l...read more
Answered by AI
Add your answer

Q1. How hashmap works internally
Add your answer

Getting apptitude test

Q1. Spring Boot Question
Add your answer
Q2. Spring Boot inter view Question
Add your answer

Q1. Based on the resume
Add your answer

Q1. Scenario based questions
Add your answer

Q1. Package discussion
Add your answer

Q1. Explain OOPs concepts.
Ans. 
OOPs concepts are fundamental principles of object-oriented programming that help in designing and implementing software solutions.
• Encapsulation: Bundling data and methods together in a class.

• Inheritance: Creating new classes by inheriting properties and behaviors from existing classes.

• Polymorphism: Ability of an object to take on many forms.

• Abstraction: Hiding complex implementation details and providing a simplified ...read more
Answered by AI
Add your answer
Q2. Write a program to count occurance the letter in a string.
Ans. 
This program counts the occurrence of each letter in a given string.
• Use a HashMap to store the count of each letter.

• Iterate through the characters of the string and update the count in the HashMap.

• Finally, print the count of each letter.
Answered by AI
Add your answer
Q3. Write a SQL query to find third highest salary from employee table.
Ans. 
SQL query to find third highest salary from employee table.
• Use the ORDER BY clause to sort the salaries in descending order

• Use the LIMIT clause to limit the result to the third row

• Use a subquery to exclude the highest and second highest salaries
Answered by AI
Add your answer
Q4. Difference between Array and arraylist.
Ans. 
Array is a fixed-size data structure while ArrayList is a dynamic-size data structure in Java.
• Array has a fixed length, while ArrayList can grow dynamically.

• Array can store both primitive types and objects, while ArrayList can only store objects.

• Array uses square brackets [] for declaration, while ArrayList uses angle brackets <>.

• Array provides direct access to elements using index, while ArrayList provides methods for...read more
Answered by AI
Add your answer
Q5. Explain working of Arraylist.
Ans. 
ArrayList is a dynamic array that can grow or shrink in size. It stores objects and provides methods for adding, removing, and accessing elements.
• ArrayList is part of the Java Collections Framework.

• It is implemented as a resizable array.

• Elements can be added using the add() method.

• Elements can be accessed using the get() method.

• Elements can be removed using the remove() method.

• The size() method returns the number of el...read more
Answered by AI
Add your answer
Q6. What is the default size of an arraylist.
Ans. 
The default size of an ArrayList is 10.
• The default initial capacity of an ArrayList is 10.

• If the number of elements exceeds the initial capacity, the ArrayList automatically increases its size.

• The capacity of an ArrayList can be increased manually using the ensureCapacity() method.
Answered by AI
Add your answer
Q7. Some questions from my resume about my previous experience.
Add your answer
Q8. The interviewer was stupid and in my opinion they are just wasting your precious time. After the interview they don't provide any updates about the interview.
Add your answer

Q1. Inheritance,polymorphism,local storage,abstraction, features of java,Jit,wrapper class
Add your answer
Q2. Object oriented programming system
Add your answer
Q3. Structured query language
Add your answer
Q4. Database in sql
Ans. 
A database in SQL is a structured collection of data that is stored and accessed using SQL queries.
• SQL stands for Structured Query Language, used to interact with databases.

• Tables are used to store data in a database, with rows representing individual records and columns representing attributes.

• Queries can be used to retrieve, insert, update, and delete data from a database.

• Primary keys uniquely identify each record in...read more
Answered by AI
Add your answer
Q5. Awt,jre,json,storage
Add your answer