Six Sigma Soft Solutions HR Coordinator Interview Questions and Answers

Contiguous array in java

Q1. Microservices architecture
Add your answer
Q2. Saga design pattern
Add your answer

Construct binary tree from expression

Q1. Microservices patterns
Add your answer
Q2. Circuit breaker
Add your answer

Q1. First round was telephonic of 20 mins. They asked me about OOPS Concepts, Core java and collections. It was easy .
Add your answer
Q2. Throw and throws Diff Heap and stack Diff Arraylist and linkedlist Diff Why string is immutable in Java OOPS 4 pillars
Add your answer

Q1. This was 2nd Technical round(final round) . He asked me about my experience and technical skills. 1.Concurrenthashmap and hashtable 2.Internal working of concurrenthashmap 3.Comparable and Comparator Diff...read more
Add your answer

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
Answered by AI
Add your answer
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
Answered by AI
Add your answer
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
Answered by AI
Add your answer

Q1. Please give an introduction of yourself.
Add your answer
Q2. Your comfortable programming/coding language
Add your answer
Q3. What is session in java?
Ans. 
Session in Java is a way to store information about a user across multiple requests.
• Session is used to maintain stateful information about a user.

• It is created when a user first accesses a web application and remains active until the user logs out or the session times out.

• Session data is stored on the server and can be accessed by multiple requests from the same user.

• It is commonly used for user authentication, shoppin...read more
Answered by AI
View 1 more answer
Q4. What is Java Class Library?
Ans. 
Java Class Library is a collection of pre-compiled classes and methods that provide ready-to-use functionality for Java developers.
• Java Class Library contains classes for common tasks like input/output, networking, database access, etc.

• Developers can use these classes to save time and effort by reusing existing code.

• Examples include java.lang, java.util, java.io, java.net, etc.
Answered by AI
View 1 more answer
Q5. Types of datatypes in Java
Ans. 
Java has several types of datatypes including primitive and reference types.
• Primitive datatypes include int, double, boolean, char, etc.

• Reference datatypes include classes, interfaces, arrays, etc.

• Examples: int age = 25; String name = "John"; int[] numbers = {1, 2, 3};

• Wrapper classes like Integer, Double, Boolean, etc. are used to wrap primitive types.
Answered by AI
View 1 more answer
Q6. One question was on SQL. (I had mentioned SQL in one of my academic projects)
Add your answer
Q7. Please tell me What is HTML?
Ans. 
HTML stands for HyperText Markup Language, used for creating and structuring web pages.
• HTML is a markup language used to create the structure of web pages.

• It consists of elements enclosed in tags, such as <html>, <head>, <body>.

• Attributes can be added to elements to provide additional information or functionality, like <img src='image.jpg'>.

• HTML is the foundation of web development and is often
Answered by AI
View 1 more answer
Q8. How to change a div background colour?
Ans. 
Use CSS to change the background color of a div element.
• Use the 'background-color' property in CSS to specify the color.

• You can use color names, hex codes, RGB values, or HSL values to set the background color.

• Example: div { background-color: blue; }
Answered by AI
View 2 more answers

Q1. 1. How microservices communicate with each other?
Ans. 
Microservices communicate with each other through APIs and messaging protocols.
• Microservices use APIs to communicate with each other.

• Messaging protocols like HTTP, AMQP, and MQTT are used for asynchronous communication.

• Service discovery mechanisms like Eureka and Consul are used to locate services.

• API gateways like Zuul and Kong are used to manage API traffic.

• Event-driven architecture is used for real-time communicatio
Answered by AI
View 1 more answer
Q2. 2. How do you secure your APIs?
Ans. 
Securing APIs involves implementing authentication, authorization, encryption, and input validation.
• Implement authentication mechanisms like OAuth, JWT, or API keys

• Use authorization to control access to APIs based on user roles and permissions

• Encrypt sensitive data transmitted over the network using HTTPS

• Validate and sanitize input to prevent common security vulnerabilities like SQL injection or cross-site scripting (X
Answered by AI
View 1 more answer
Q3. 3. Scenario based question on qualifier?
Add your answer
Q4. 4. What is ORM tool?
Ans. 
ORM (Object-Relational Mapping) tool is a software framework that maps objects to relational databases.
• ORM tool simplifies database operations by allowing developers to interact with databases using object-oriented programming.

• It eliminates the need for writing complex SQL queries by providing a higher-level abstraction.

• ORM tools handle tasks like data persistence, retrieval, and mapping between objects and database ta...read more
Answered by AI
View 1 more answer
Q5. 5. Advantages of hibernate
Ans. 
Hibernate simplifies database programming in Java applications.
• Hibernate provides a simple and efficient way to interact with databases.

• It eliminates the need for writing complex SQL queries.

• It supports object-oriented programming and mapping of Java classes to database tables.

• It provides caching and lazy loading mechanisms for improved performance.

• It supports transaction management and reduces the risk of data corrupt...read more
Answered by AI
Add your answer
Q6. 6. Rest controller vs Controller
Ans. 
Rest controller is used for RESTful web services while Controller is used for traditional web applications.
• Rest controller maps HTTP requests to RESTful web services while Controller maps HTTP requests to traditional web applications.

• Rest controller uses @RestController annotation while Controller uses @Controller annotation.

• Rest controller returns data in JSON or XML format while Controller returns data in HTML format...read more
Answered by AI
Add your answer
Q7. 7. What if i write component in place of service ?
Ans. 
Using component instead of service may cause confusion and errors in the code.
• Components and services are two different concepts in Java development.

• Components are used for UI elements while services are used for business logic.

• Using component instead of service may lead to errors in the code and confusion for other developers.

• For example, if a component is used instead of a service for business logic, it may not have ...read more
Answered by AI
Add your answer
Q8. 8. What is the work of @autowired?
Ans. 
The @Autowired annotation is used to automatically wire beans by matching the data type of the bean with the data type of the property.
• Used to inject dependencies automatically

• Reduces the need for manual bean configuration

• Can be used with constructors, fields, and methods

• Can be used with @Qualifier to specify which bean to wire
Answered by AI
Add your answer
Q9. 9. What is Eureka server ? Default port
Ans. 
Eureka server is a service registry that enables microservices to discover and communicate with each other.
• Eureka server is a component of Netflix's OSS suite.

• It allows services to register themselves and discover other services.

• It uses a REST API for communication.

• Default port is 8761.
Answered by AI
Add your answer
Q10. 10. What is circuit breaker? Hystrix
Ans. 
Circuit breaker is a design pattern used to prevent cascading failures in distributed systems. Hystrix is a popular implementation.
• Circuit breaker monitors the availability of a service and trips if the service fails repeatedly.

• It helps to prevent cascading failures by failing fast and providing fallback options.

• Hystrix is a popular implementation of circuit breaker pattern in Java.

• It provides features like request cac
Answered by AI
Add your answer
Q11. 11. What are ternary operators ?
Ans. 
Ternary operators are conditional operators that evaluate a boolean expression and return one of two values based on the result.
• Ternary operators are written in the form of 'condition ? value1 : value2'

• If the condition is true, the operator returns value1, otherwise it returns value2

• Ternary operators can be used as a shorthand for if-else statements

• Example: int x = (a > b) ? a : b; // assigns the larger value of a and
Answered by AI
Add your answer
Q12. 12. How to write the entity class?
Ans. 
Entity class represents a table in a database and its attributes as fields.
• Define class with @Entity annotation

• Add @Id annotation to primary key field

• Add @Column annotation to map fields to table columns

• Implement getters and setters

• Override equals() and hashCode() methods
Answered by AI
View 1 more answer
Q13. 13. What is crud vs Jpa ?
Ans. 
CRUD is a basic operation for data manipulation while JPA is a Java specification for ORM.
• CRUD stands for Create, Read, Update, and Delete which are basic operations for data manipulation.

• JPA is a Java specification for Object-Relational Mapping (ORM) which provides a way to map Java objects to relational database tables.

• JPA provides a higher level of abstraction and simplifies the data access layer by providing an API...read more
Answered by AI
Add your answer