NeoSOFT Trainee Interview Questions and Answers

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
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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.
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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
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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 metho...read more
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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
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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.
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Q7. Some questions from my resume about my previous experience.
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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.
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What is java
What' is object composition
What is class

Q1. What' is about your self
Ans. 
I am a Java Developer with 5 years of experience in developing web applications.
• I have a strong understanding of Java programming language and its frameworks like Spring and Hibernate.

• I have experience in developing RESTful APIs and integrating third-party APIs.

• I am proficient in database management using SQL and have worked with MySQL and Oracle databases.

• I have a good understanding of front-end technologies like HTML...read more
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Q2. What is javascript What is jdk What is while loop
Ans. 
Javascript is a scripting language used for web development. JDK is a Java Development Kit. While loop is a control flow statement.
• Javascript is used for client-side scripting, creating interactive web pages, and adding functionality to web applications.

• JDK is a software development kit used for developing Java applications.

• While loop is a control flow statement used to execute a block of code repeatedly as long as a s
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Q3. What is java What is object
Ans. 
Java is a high-level programming language used for developing applications. An object is an instance of a class.
• Java is platform-independent and can run on any device with a JVM.

• Java is an object-oriented language that supports encapsulation, inheritance, and polymorphism.

• Objects are created from classes and have properties and methods.

• Example: A car class can have objects like BMW, Audi, etc. with properties like colo
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Q1. How hashmap works internally
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Q1. About Java, J2ee, Mysql, Spring-core, Spring-mvc, Spring-boot
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Q2. About java, j2EE, My-sql, Spring-core, Spring-mvc, Spring-boot
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Recursion of prime number

Q1. Question related to project and on spring boot
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Q1. Salary discussion
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Q1. 1. Write a program to sort the characters of a string in descending order? 2. Write a lambda expression of addition? 3. How to write custom exceptions? 4. What is indexing?
Ans. 
This program sorts the characters of a string in descending order.
• Convert the string to a character array

• Sort the character array in descending order

• Convert the sorted character array back to a string
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Q2. 5. What are scope of beans? 6. Functional interfaces and examples 7. Can we make a class as private? 8. SQL query to find employees of particular department table. 9. Cascading 10. MapBy in hibernate 11. ...read more
Ans. 
Java Developer interview questions on beans, functional interfaces, SQL queries, hibernate, and more.
• Scope of beans refers to the visibility of a bean within an application context.

• Functional interfaces have only one abstract method and can be used as lambda expressions.

• Classes cannot be private, but their constructors can be.

• SQL query to find employees of a particular department table: SELECT * FROM employees WHERE de...read more
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Basic core Java mcqs and aptitude questions

Q1. Questions on core Java,spring MVC,spring boot , hibernate and msql
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Q1. OOPS concept Java Hashmap vs HashTable Java 8 new features code: count character of a string
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Q1. On project experience related question to the first question
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Q1. Compensation discussion
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Q1. What's collection?
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Q2. Java 8 features?
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