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Netwin Systems & Software Java Developer Interview Questions, Process, and Tips
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1 interview found
I applied via Naukri.com and was interviewed in Aug 2023. There was 1 interview round.
(4 Questions)
- Q1. Can we make constructor private ?
- Ans.
Yes, we can make a constructor private in Java.
Private constructors are used to prevent instantiation of a class from outside the class itself.
Private constructors are commonly used in singleton design pattern.
Private constructors can be used in utility classes where all methods are static and no instance creation is needed.
- Q2. How can we create object of class of private constructor?
- Ans.
You can create an object of a class with a private constructor by using a static method within the class.
Create a static method within the class that returns an instance of the class.
Call the static method to create an object of the class.
- Q3. How can you secure api
- Ans.
Securing an API involves using authentication, authorization, encryption, and input validation.
Use authentication methods like OAuth, JWT, or API keys to verify the identity of clients accessing the API.
Implement authorization to control what actions different users can perform within the API.
Encrypt data transmission using HTTPS to protect sensitive information from being intercepted.
Validate and sanitize input data t...
- Q4. What is Have clause?
- Ans.
HAVING clause is used in SQL to filter the results of a GROUP BY clause.
Used with GROUP BY to filter grouped results
Filters rows after grouping
Similar to WHERE clause but operates on grouped data
Interview Preparation Tips
- Core Java
- Spring Boot
Skills evaluated in this interview
Java Developer Jobs at Netwin Systems & Software
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(2 Questions)
- Q1. What is the difference between abstract class and an interface in Java?
- Ans.
Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
Abstract class can have constructors, member variables, and methods, while interface cannot.
A class can implement multiple interfaces but can only extend one abstract class.
Abstract classes are used to define a common behavior among subclasses, while interfaces are used to define a contract for classes to impl...
- Q2. An abstract class can have method implements and abstract method, while an interface only contains abstract method (before Java 8) . Abstract classes support single inheritance, whereas interfaces support ...
- Ans.
Abstract classes can have both implemented and abstract methods, while interfaces can only have abstract methods. Abstract classes support single inheritance, interfaces support multiple inheritance.
Abstract classes can have both implemented and abstract methods, providing more flexibility in design.
Interfaces can only have abstract methods, promoting a more strict contract for implementing classes.
Abstract classes sup...
I applied via Walk-in and was interviewed in Nov 2024. There were 2 interview rounds.
Questions on string and arrays both are moderate level questions on hacherrank type for 20 marks
(2 Questions)
- Q1. Constructor chaining
- Q2. Hasmap and treemap
Selected
I applied via campus placement at National Institute of Technology (NIT), Warangal and was interviewed in Jul 2022. There were 3 interview rounds.
Their are 30 questions which one has to done in 30 mins
(2 Questions)
- Q1. Q1) About the project you have done
- Q2. Q2) some technical questions related to core Java
Interview Preparation Tips
Java Developer Interview Questions & Answers
Solartis Technology Services
Anonymous
posted on 31 May 2022
I applied via Naukri.com and was interviewed before May 2021. There were 3 interview rounds.
Easy
(1 Question)
- Q1. Tell me about yourself Why you choose IT & developer role OOPs concept, sample Java program
(1 Question)
- Q1. Personal and salary details.
Interview Preparation Tips
Good luck.
(2 Questions)
- Q1. What is the difference between HashMap and ConcurrentHashMap?
- Q2. HashMap is not thread-safe, but ConcurrentHashmap is thread-safe and allows concurrent access.
Java Developer Interview Questions & Answers
Thinkitive Technologies
Rupali Gaikar
posted on 8 Aug 2024
I applied via Naukri.com and was interviewed in Jul 2024. There was 1 interview round.
(1 Question)
- Q1. Oops Concepts ,Absrtraction,Polymorphism
(2 Questions)
- Q1. How does JVM optimize method calls?
- Q2. JVM just Just-In-Time (JIT) compilation, method inlining, and escape analysis for optimization.
I applied via LinkedIn and was interviewed in Apr 2024. There were 2 interview rounds.
Q.1 Pattern
1
*2*
**3**
Q. 2
write code to get sub array with max sum from given array.
(1 Question)
- Q1. Introduction Project Deatails Oops Concept Collection Exception Handling Abstract Class Functional Interface Spring Framework
Interview Preparation Tips
- Java
- Advanced Java
- SQL
- Data Structures
(2 Questions)
- Q1. What is the purpose of the volatile keyword?
- Q2. It ensures visibility nd prevents instruction reordering in multi-threading.
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