Tavant Technologies Interview Questions, Process, and Tips

Easy, basic maths and logic

Simple questions on strings and arrays, no complex data-structures asked.

Q1. Similar to coding round level questions, no dsa based coding questions were asked but, dsa concepts such as linked lists, stacks and queues and their uses were asked.
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Q2. SQL BASED QUESTIONS
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Q3. STRING AND ARRAY BASED CODING QUESTIONS
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Q1. How you previously handling microservices deployment?
Ans. 
I have experience using containerization tools like Docker and Kubernetes for microservices deployment.
• I have used Docker to create container images for each microservice.

• I have used Kubernetes to manage the deployment, scaling, and load balancing of the microservices.

• I have also used Helm charts to package and deploy the microservices as a group.

• I have implemented CI/CD pipelines using tools like Jenkins or GitLab to ...read more
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Q2. Explain about design patterns you used ?
Ans. 
I have used various design patterns such as Singleton, Factory, Observer, and Decorator.
• Singleton pattern was used to ensure only one instance of a class is created.

• Factory pattern was used to create objects without exposing the instantiation logic to the client.

• Observer pattern was used to notify the dependent objects when there is a change in the state of an object.

• Decorator pattern was used to add new functionality ...read more
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Q3. Write own singleton class and secure it in multi threading environment?
Ans. 
A singleton class is a class that can only be instantiated once. It is important to secure it in a multi-threading environment.
• Create a private constructor to prevent external instantiation

• Create a private static instance of the class

• Create a public static method to return the instance

• Use synchronized keyword to ensure thread safety

• Consider using double-checked locking to improve performance
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Q4. Why string is immutable , is it possible to write our own immutable class?
Ans. 
String is immutable to ensure thread safety and security. Yes, we can write our own immutable class.
• String is immutable to prevent accidental modification of data.

• Immutable classes ensure thread safety and security.

• We can write our own immutable class by making all fields final and not providing any setters.

• Examples of immutable classes are String, Integer, and LocalDate.
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Q5. Write code to find repeated characters in string with count using java 8?
Ans. 
Code to find repeated characters in string with count using Java 8
• Convert string to char array

• Use streams to group by character and count

• Filter out characters with count less than 2

• Print the repeated characters with their count
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Q6. Get third highest salary in given employee list use java 8?
Ans. 
Get third highest salary in given employee list using Java 8
• Sort the employee list in descending order of salary using Comparator

• Use distinct() to remove duplicates

• Skip the first two highest salaries using skip()

• Use findFirst() to get the third highest salary
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Q7. Do you know difference between functional programming and object oriented programming?
Ans. 
Functional programming focuses on functions while object oriented programming focuses on objects and their interactions.
• Functional programming emphasizes immutability and avoids side effects.

• Object oriented programming uses classes and objects to encapsulate data and behavior.

• Functional programming languages include Haskell and Lisp while object oriented programming languages include Java and C++.

• Functional programming...read more
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Q1. In microservices environment , if we deploy in cloud for every instance port number always changing right . So, how you going to call your instance int his case ?
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Q2. Have you configured saga design pattern in your project?
Ans. 
Yes, I have configured saga design pattern in my project.
• I have used saga design pattern to manage complex workflows and transactions.

• I have implemented sagas using libraries like Redux-Saga and NServiceBus.

• I have used sagas to handle scenarios like order processing, payment processing, and inventory management.

• I have also used sagas to handle compensating transactions in case of failures.
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Q3. How you securing your microservices?
Ans. 
We secure our microservices using a combination of authentication, authorization, encryption, and monitoring.
• We use OAuth2 for authentication and authorization.

• We encrypt sensitive data using AES-256 encryption.

• We use SSL/TLS for secure communication between microservices.

• We implement rate limiting to prevent DDoS attacks.

• We monitor our microservices using tools like Prometheus and Grafana.

• We perform regular security a
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Q4. Have you involved in CI/CD process ?
Ans. 
Yes, I have extensive experience in implementing CI/CD pipelines.
• I have worked with tools like Jenkins, GitLab CI/CD, and Travis CI.

• I have automated build, test, and deployment processes for multiple projects.

• I have integrated code quality checks and security scans into the pipeline.

• I have also implemented blue-green and canary deployment strategies.

• Overall, I understand the importance of continuous integration and del
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Q5. What is the real time scenario , where you are using the circuit breaker ?
Ans. 
Circuit breaker is used to prevent cascading failures in distributed systems.
• Circuit breaker is used to handle faults in microservices architecture.

• It is used to prevent overloading of a service by temporarily stopping requests to it.

• It helps in improving the resilience of the system by handling failures gracefully.

• Example: If a service is down, circuit breaker will stop sending requests to it and will try again after ...read more
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Q6. Do you know about orchestration and choreography design patterns?
Ans. 
Orchestration and choreography are design patterns used in distributed systems.
• Orchestration involves a central controller that coordinates the interactions between services.

• Choreography involves services communicating with each other directly without a central controller.

• Orchestration is more suitable for complex workflows while choreography is more flexible.

• Examples of orchestration tools include Kubernetes and Apach...read more
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Q7. How you implementing and validating the JWT token ?
Ans. 
JWT tokens are implemented and validated using a combination of server-side and client-side code.
• The server generates a JWT token and sends it to the client upon successful authentication.

• The client stores the token in local storage or a cookie.

• For each subsequent request, the client sends the token in the Authorization header.

• The server verifies the token's signature and expiration time before processing the request.

• I...read more
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Q8. Which one is best constructor injection or Setter injection?
Ans. 
Constructor injection is preferred over Setter injection.
• Constructor injection ensures that all required dependencies are provided at the time of object creation.

• Setter injection allows for optional dependencies and can be used for dynamic changes.

• Constructor injection is more secure as the object is fully initialized before use.

• Setter injection can lead to inconsistent object states if not used carefully.

• Constructor i...read more
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Q9. Why we need Autowire in Spring ?
Ans. 
Autowire simplifies dependency injection in Spring by automatically wiring beans together.
• Autowire eliminates the need for manual bean wiring in XML configuration files.

• It reduces the amount of boilerplate code needed to configure dependencies.

• Autowire can be used with different types of injection, such as constructor, setter, and field injection.

• Example: @Autowired private MyService myService; will automatically injec...read more
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Q10. Difference between @Configuration and @Component annotations?
Ans. 
Difference between @Configuration and @Component annotations
• The @Configuration annotation is used to define a configuration class that provides bean definitions

• The @Component annotation is used to mark a class as a Spring component

• Configuration classes can be imported into other configuration classes using @Import annotation

• Components can be scanned and automatically registered as beans using @ComponentScan annotation
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Q11. Can you tell me what are the design patterns you worked?
Ans. 
I have worked with various design patterns including MVC, Singleton, Factory, and Observer.
• MVC pattern for separating concerns in web applications

• Singleton pattern for ensuring only one instance of a class is created

• Factory pattern for creating objects without exposing the instantiation logic

• Observer pattern for implementing event-driven architectures
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Q1. Difference between abstract class and interface
Ans. 
Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
• Abstract class can have constructors, fields, and methods, while interface cannot have any implementation.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Abstract classes are used to define a common behavior for subclasses, while interfaces are used to define a contract f...read more
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Q2. Tell about abstraction and encapsulation
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Abstraction focuses on hiding the implementation details while encapsulation bundles the data and methods into a single unit.
• Abstraction allows us to focus on the essential features of an object while hiding the irrelevant details.

• Encapsulation helps in bundling the data and methods that operate on the data into a single unit.

• Abstraction is achieved through abstract classes and interfaces in object-oriented programming...read more
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Q3. Sql query (db design)
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Q4. Angular(directives, pipes, routing)
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Q1. All OOPS, RDBMS, design patterns, sql query, expeirence, asd asd asd asd asd
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Q2. SQl query, solid principle
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