10+ Yara International Interview Questions and Answers

Abstraction focuses on what an object does, while encapsulation focuses on how it does it.

• Abstraction is the process of hiding complex implementation details and showing only the necessary information to the user.

• Encapsulation is the process of wrapping data and methods into a single unit, preventing direct access to the data from outside the unit.

• Abstraction is achieved through abstract classes and interfaces.

• Encapsulation is achieved through access modifiers like public, pr...read more

I use a combination of debugging tools and techniques to identify and resolve issues in code.

• I start by reproducing the issue and identifying the scope of the problem.

• I use debugging tools like breakpoints, logging, and tracing to narrow down the issue.

• I review the code and documentation to understand the expected behavior.

• I collaborate with team members to get a fresh perspective and brainstorm solutions.

• I test and validate the fix before deploying it to production.

Dependency injection is a design pattern that allows objects to be passed as dependencies rather than being created within a class.

• Dependency injection promotes loose coupling and makes code more testable.

• Concrete classes are tightly coupled and can be difficult to test.

• Dependency injection can be achieved through constructor injection, setter injection, or interface injection.

• Example: A class that requires a database connection can be passed the connection object through dep...read more

Microservice architecture involves breaking down a large application into smaller, independent services. Services can communicate with each other through APIs.

• Microservice architecture breaks down a large application into smaller, independent services that can be developed, deployed, and scaled independently.

• Services communicate with each other through APIs, typically using HTTP/REST or messaging protocols like RabbitMQ or Kafka.

• One service can call another service by making ...read more

Improving query performance involves optimizing database design, indexing, and query structure.

• Optimize database design by normalizing tables and reducing redundant data

• Create indexes on frequently queried columns

• Use efficient query structure, such as avoiding subqueries and using joins

• Consider using caching or denormalization for frequently accessed data

Middleware is software that connects different applications or systems together.

• Middleware acts as a bridge between different applications or systems

• It provides a common platform for communication and data exchange

• Examples of middleware include message queues, API gateways, and ESBs

Temp tables are physical tables created in tempdb while CTEs are temporary result sets.

• Temp tables are useful for storing intermediate results and can be indexed.

• CTEs are useful for simplifying complex queries and can be recursive.

• Temp tables require more resources and can cause contention in tempdb.

• CTEs are limited to the scope of a single query.

• Example: CREATE TABLE #temp (id INT); WITH cte AS (SELECT id FROM table) SELECT * FROM cte;

• Example: WITH recursive_cte AS (SELECT 1...read more

My project architecture follows a microservices design pattern with a combination of front-end and back-end technologies.

• Utilizes microservices design pattern

• Combination of front-end and back-end technologies

• Uses RESTful APIs for communication between services

Keywords used in Java programming language

• static keyword is used to create class-level variables and methods

• finally keyword is used in exception handling to define a block of code that will always be executed

• super keyword is used to refer to the superclass of the current object

SOLID principle is a set of five design principles to make software more maintainable, flexible and scalable.

• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Subtypes must be substitutable for their base types.

• I - Interface Segregation Principle: Clients should not be forced to depend on interfaces they do n...read more

Transient variables are not serialized, while scoped variables are.

• Transient variables are not saved when an object is serialized and deserialized.

• Scoped variables are saved when an object is serialized and deserialized.

• Transient variables are used to indicate that a variable should not be serialized.

• Scoped variables are used to indicate that a variable should be serialized.

Singly linked list has one pointer in each node pointing to the next node, while doubly linked list has two pointers - one pointing to the next node and one pointing to the previous node.

• Singly linked list is more memory efficient as it only requires one pointer per node.

• Doubly linked list allows for traversal in both directions, while singly linked list only allows traversal in one direction.

• Insertions and deletions are faster in doubly linked list as compared to singly link...read more

Code to swap elements in array using Go

• Create a function that takes in an array of strings and two indices to swap

• Use a temporary variable to store one of the elements before swapping

• Update the array with the elements swapped

Polymorphism is the ability of a function or method to behave differently based on the object it is called with.

• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• Types of polymorphism include compile-time (method overloading) and runtime (method overriding) polymorphism.

• Example: Animal superclass with subclasses Dog and Cat. Both Dog and Cat can be treated as Animals.