UKG Interview Questions, Process, and Tips

Aptitude and coding round, one coding question and others are computer fundamentals

Q1. Return true if Subarray is present whose sum is 0
Ans. 
Check if there is a subarray with sum 0 in the given array of strings.
• Iterate through the array and keep track of the running sum using a hashmap.

• If the running sum is seen before, then there exists a subarray with sum 0.

• Return true if a subarray with sum 0 is found, otherwise return false.
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Q2. Project, oops, dbms
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Q1. Subarray sun equal to k
Ans. 
Find the number of subarrays that sum up to a given target value k.
• Use a hashmap to store the running sum and its frequency as you iterate through the array.

• For each element, check if the running sum - k exists in the hashmap. If it does, increment the count of subarrays.

• Return the total count of subarrays that sum up to k.
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Q2. Project, oops, dbms
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Q1. Did not got slected i answered all still
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Q1. Tell me java8 features
Ans. 
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
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Q2. Find 2nd largest number in an array
Ans. 
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
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Q1. Write a prograame to find duplicate
Ans. 
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
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Q2. Amazon page automation
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Q1. Past experience in devops
Ans. 
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
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Q2. Scripted jeninsfile for CI
Ans. 
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
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Q1. WAF implementation in AWS
Ans. 
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.
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Q2. Write a CD jenkinsfile
Ans. 
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
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Q1. Problem solving question
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Q2. Java , stream , Spring fundamentals
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Q1. Some basic String array problem solving question
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Q2. Java questions like junit , Spring boot
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Q1. String questions , DSA problem
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Q2. Java questions in brief
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Q1. What is Service Registry, Hibernate, Microservices pattern
Ans. 
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
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Q2. Coding question two strings you have to find what is smallest substring will all letters in s2.
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