UKG Interview Questions, Process, and Tips

Java 8 introduced several new features including lambda expressions, functional interfaces, streams, and default methods.

• Lambda expressions allow you to write code in a more concise way by replacing anonymous classes.

• Functional interfaces are interfaces with a single abstract method, which can be implemented using lambda expressions.

• Streams provide a way to work with sequences of elements and perform operations like fi...read more

Iterate through array to find 2nd largest number

• Iterate through array and keep track of largest and second largest numbers

• Handle edge cases like duplicates and empty array

• Example: ['3', '5', '2', '7', '5'] should return 5 as the 2nd largest number

Program to find duplicate strings in an array

• Iterate through the array and store each string in a HashSet

• If a string is already in the HashSet, it is a duplicate

• Return a list of all duplicate strings found

I have 5 years of experience in implementing DevOps practices in various organizations.

• Implemented CI/CD pipelines using tools like Jenkins, GitLab CI, and CircleCI

• Automated infrastructure provisioning with tools like Terraform and Ansible

• Managed containerized applications using Docker and Kubernetes

• Monitored and maintained production systems with tools like Prometheus and Grafana

A scripted Jenkinsfile is a Groovy script that defines the pipeline for Continuous Integration (CI).

• Use 'pipeline' block to define the stages of the CI pipeline

• Utilize 'stage' block to specify individual stages within the pipeline

• Leverage 'steps' block to define the actions to be executed within each stage

• Use 'node' block to allocate a Jenkins agent for running the pipeline

• Utilize 'checkout' step to fetch the source co

Implementing a Web Application Firewall (WAF) in AWS for enhanced security.

• Use AWS WAF to protect web applications from common web exploits.

• Create rules to filter and monitor HTTP and HTTPS requests.

• Integrate AWS WAF with other AWS services like CloudFront or API Gateway for comprehensive protection.

A CD Jenkinsfile automates the Continuous Delivery process in Jenkins.

• Define stages for build, test, deploy

• Use declarative syntax for pipeline

• Include steps for version control, artifact management

• Utilize plugins for notifications, approvals

• Implement error handling and rollback mechanisms

Service Registry is a centralized directory for managing information about services. Hibernate is an ORM tool for Java. Microservices pattern is an architectural style that structures an application as a collection of loosely coupled services.

• Service Registry is used for service discovery, load balancing, and failover in microservices architecture.

• Hibernate is an ORM tool that maps Java objects to database tables and v...read more

psvm in Java stands for public static void main, which is the entry point for a Java program.

• psvm is the method signature for the main method in Java programs.

• It is used to start the execution of a Java program.

• It must be declared as public, static, and void.

• It takes an array of strings as an argument, which can be used to pass command line arguments.

A collection is a group of related objects or data items that are stored together.

• Collections can be implemented using data structures like arrays, lists, sets, maps, etc.

• Collections allow for easy manipulation and organization of data.

• Examples of collections include arrays of integers, lists of strings, sets of unique values, and maps of key-value pairs.