40+ EPAM Systems Interview Questions and Answers

I rate myself as proficient in Java.

• I have experience in developing Java applications for over 2 years.

• I am familiar with core Java concepts such as OOP, collections, and exception handling.

• I have worked with popular Java frameworks such as Spring and Hibernate.

• I am comfortable writing efficient and optimized code in Java.

• I am always eager to learn and improve my skills in Java programming.

Python code to find the longest palindrome in a given string

• Iterate through each character in the string and check for palindromes centered at that character

• Keep track of the longest palindrome found so far

• Return the longest palindrome at the end

To fetch all input values in javascript, we can use the document.querySelectorAll() method.

• Use document.querySelectorAll() method to select all input elements

• Loop through the selected elements to get their values

• Store the values in an array or object for further use

Smart services in the process model include Data store Entity, Write Multiple Data Store Entity, and gates.

• Smart services are components in Appian that perform specific actions or operations.

• Data store Entity is a smart service used to create or update records in a data store.

• Write Multiple Data Store Entity is a smart service used to create or update multiple records in a data store.

• Gates are smart services used to control the flow of a process based on certain conditions.

Count the number of occurrences of a specific substring in a given string.

• Use the built-in string method 'count' to count occurrences of a substring in a string.

• For example, 'hello world'.count('o') will return 2.

• You can also use a loop to iterate through the string and count occurrences manually.

I am shifting from software testing to Appian development because of my passion for coding and desire to expand my skillset.

• I have always had a strong interest in coding and software development.

• I have gained experience and knowledge in software testing, which has given me a solid foundation for understanding the software development process.

• I believe that becoming an Appian developer will allow me to utilize my skills in a more creative and impactful way.

• Appian development o...read more

LinkedIn and Naukri can be used to source candidates for HR Consultant positions.

• Create a detailed job description and post it on both LinkedIn and Naukri.

• Utilize LinkedIn's advanced search filters to find candidates with relevant skills and experience.

• Join relevant LinkedIn groups and engage with professionals in the HR field to expand your network.

• Use Naukri's resume database to search for candidates based on specific criteria.

• Leverage LinkedIn's InMail feature to directly ...read more

Code to generate Fibonacci series

• Use a loop to iterate and calculate each Fibonacci number

• Start with the base cases of 0 and 1

• Add the previous two numbers to get the next Fibonacci number

Spring Boot with microservices is a framework for building scalable and modular applications.

• Spring Boot is a Java-based framework that simplifies the development of standalone, production-grade Spring applications.

• Microservices architecture is an architectural style that structures an application as a collection of small, loosely coupled services.

• Spring Boot with microservices allows developers to build and deploy independent services that can be easily scaled and maintained...read more

Attributes of the Input element include type, name, value, placeholder, and required.

• Type attribute specifies the type of input (text, password, checkbox, etc.)

• Name attribute specifies the name of the input element

• Value attribute specifies the initial value of the input element

• Placeholder attribute specifies a short hint that describes the expected value of the input element

• Required attribute specifies whether the input field must be filled out before submitting the form

To become a senior software engineer leading a team, contribute to innovative projects, and continue learning new technologies.

• Obtain advanced certifications in relevant technologies

• Lead a successful project from start to finish

• Mentor junior team members

• Attend industry conferences and workshops

• Contribute to open source projects

LAN stands for Local Area Network. It is a network that connects computers and devices in a limited area such as a home, office, or school.

• LAN is a network that connects devices within a limited area, typically a building or campus.

• It allows for the sharing of resources such as files, printers, and internet access.

• LANs are commonly used in homes, offices, and schools to facilitate communication and resource sharing among connected devices.

Network layer protocols define how data is transmitted between devices in a network.

• Network layer protocols operate at the network layer of the OSI model.

• They are responsible for routing packets from the source to the destination.

• Examples include IP (Internet Protocol), ICMP (Internet Control Message Protocol), and ARP (Address Resolution Protocol).

Program to sort an array of strings

• Use built-in sorting functions

• Implement sorting algorithms like bubble sort, merge sort, quick sort

• Consider time and space complexity

Binary search is a divide and conquer algorithm that finds the position of a target value within a sorted array.

• Start by defining the low and high indices of the array.

• Calculate the mid index as (low + high) / 2.

• Compare the target value with the value at the mid index and adjust the low and high indices accordingly.

• Repeat the process until the target value is found or the low index surpasses the high index.

Hibernate is an ORM tool that maps Java classes to database tables.

• Hibernate simplifies database access by abstracting the underlying SQL queries.

• It provides a way to map Java classes to database tables using annotations or XML files.

• Hibernate supports various types of associations between classes, such as one-to-one, one-to-many, and many-to-many.

• It also supports caching to improve performance.

• Hibernate can be integrated with Spring framework for easier configuration and man...read more

Program to print a pattern using an array of strings

• Create an array of strings to hold the pattern

• Use loops to fill the array with the desired pattern

• Print the array to display the pattern

Essential customer service skills include communication, empathy, problem-solving, patience, and adaptability.

• Effective communication to understand and address customer needs

• Empathy to show understanding and compassion towards customers

• Problem-solving skills to resolve issues efficiently

• Patience to handle difficult customers and situations

• Adaptability to adjust to different customer personalities and needs

Switches and routers are networking devices used to connect devices within a network and route data between different networks.

• Switches operate at the data link layer of the OSI model and are used to connect devices within a local area network (LAN).

• Routers operate at the network layer of the OSI model and are used to connect different networks together.

• Switches use MAC addresses to forward data to the correct destination within a network.

• Routers use IP addresses to determine...read more

Implementing the Mississippi code in Java

• Create a Java program that outputs the word 'Mississippi' in a specific format

• Use loops and conditionals to print each letter of the word 'Mississippi' multiple times

• Consider using nested loops for better control over the output

Prodapt is a global IT services company providing solutions in the telecom domain.

• Prodapt offers services such as digital transformation, network services, and customer experience management.

• They have expertise in areas like AI, IoT, and SDN/NFV.

• Prodapt works with leading telecom companies around the world to help them innovate and stay competitive.

Spring Boot is a popular Java framework for building microservices, while functional interfaces in Java 8 allow for functional programming.

• Spring Boot simplifies the process of building and deploying microservices by providing a set of pre-configured tools and conventions.

• Functional interfaces in Java 8 enable the use of lambda expressions to write more concise and readable code.

• Combining Spring Boot with functional interfaces allows for the development of efficient and scala...read more

Code for component

• Identify the requirements for the component

• Choose a suitable programming language and framework

• Design the component architecture

• Implement the component code

• Test the component thoroughly

Use blue-green deployment or canary deployment to deploy updates without downtime.

• Utilize blue-green deployment strategy to switch traffic between two identical environments.

• Implement canary deployment to gradually roll out updates to a small subset of users before full deployment.

• Use feature flags to enable/disable new features without impacting the entire system.

• Leverage containerization technologies like Docker for seamless deployment and scaling.

• Automate deployment proces...read more

Customer service is the assistance and support provided to customers before, during, and after a purchase.

• Customer service involves addressing customer inquiries, issues, and complaints in a timely and professional manner.

• It includes providing product information, troubleshooting technical problems, and processing returns or refunds.

• Good customer service focuses on building positive relationships with customers to enhance their overall experience.

• Examples: responding to custo...read more

The internet is a global network of interconnected computers that allows for communication, information sharing, and online activities.

• Global network of interconnected computers

• Allows for communication and information sharing

• Enables online activities such as browsing, emailing, and social media

• Accessed through web browsers like Chrome, Firefox, and Safari

I transformed existing ops by implementing new technologies, streamlining processes, and training staff.

• Implemented new technologies to automate tasks and improve efficiency

• Streamlined processes to eliminate bottlenecks and improve workflow

• Provided training to staff on new tools and processes to enhance their skills and productivity

To tackle conflicts, it is important to understand the root cause, communicate effectively, find common ground, and seek a win-win solution.

• Identify the root cause of the conflict

• Listen actively and communicate effectively

• Find common ground and areas of agreement

• Seek a win-win solution through compromise and collaboration

• Encourage open dialogue and respect differing perspectives

• Consider involving a mediator or facilitator if necessary

Closure is a feature in JavaScript that allows a function to access variables from its outer scope even after the function has finished executing.

• Closure is created when a function is defined inside another function.

• The inner function has access to the variables and parameters of the outer function.

• The inner function forms a closure with the outer function, preserving the state of the outer function's variables.

• Closures are commonly used to create private variables and functi...read more

Props are read-only properties that are passed from a parent component to a child component in React.

• Props allow data to be passed between components in a unidirectional flow.

• Props are immutable and cannot be modified by the child component.

• Props can be used to customize the behavior or appearance of a component.

• Props are accessed using the 'this.props' syntax in class components or as function arguments in functional components.

• Example:

The role of customer service is to assist customers with their inquiries, concerns, and issues to ensure a positive experience.

• Providing assistance and support to customers

• Resolving customer complaints and issues

• Answering customer inquiries and providing information

• Ensuring customer satisfaction and retention

• Building positive relationships with customers

I connect with clients by building relationships, understanding their needs, and providing valuable solutions.

• Building rapport through active listening and effective communication

• Understanding client's pain points and offering tailored solutions

• Following up consistently to maintain relationships

• Networking and attending industry events to expand client base

Telecom refers to the transmission of information over long distances using technology such as telephones, internet, and wireless networks.

• Telecom stands for telecommunications.

• It involves the exchange of information between two or more parties over a distance.

• Examples include phone calls, text messages, emails, and video calls.

• Telecom companies provide services such as phone and internet connectivity.

• Technologies used in telecom include landlines, mobile networks, satellites...read more

useState is a hook in React that allows functional components to have state.

• useState is a built-in hook in React.

• It allows functional components to have state.

• It returns an array with two elements: the current state value and a function to update the state.

• The initial state can be passed as an argument to useState.

• The state can be of any data type, such as a string, number, boolean, or object.

• Example: const [count, setCount] = useState(0);

Solid design principles are a set of best practices for designing software that is maintainable, scalable, and flexible.

• Single Responsibility Principle: Each class should have only one responsibility.

• Open/Closed Principle: Classes should be open for extension but closed for modification.

• Liskov Substitution Principle: Objects of a superclass should be replaceable with objects of its subclasses without affecting the program's correctness.

• Interface Segregation Principle: Clients...read more

Swapping of 2 numbers can be done using a temporary variable or without using a temporary variable.

• Declare two variables a and b with values

• Using a temporary variable:

• - Declare a temporary variable temp

• - Assign the value of a to temp

• - Assign the value of b to a

• - Assign the value of temp to b

• Without using a temporary variable:

• - Assign the sum of a and b to a

• - Assign the difference of a and b to b

• - Assign the difference of a and b to a

To face pressure, it is important to stay organized, prioritize tasks, communicate effectively, take breaks, and seek support.

• Stay organized by creating to-do lists and setting realistic goals

• Prioritize tasks based on deadlines and importance

• Communicate effectively with team members and supervisors about workload and challenges

• Take short breaks to recharge and refocus

• Seek support from colleagues or supervisors when feeling overwhelmed

Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.

• Allows a class to inherit attributes and methods from another class

• Promotes code reusability and reduces redundancy

• Creates a parent-child relationship between classes

• Derived class can override methods or add new methods

• Example: Class 'Animal' can be a parent class with attributes like 'name' and methods like 'eat', and class 'Dog' can inherit from 'Animal...read more