By the end of this course, you will be able to:

• Understand the core architecture of Apache Flink.

• Build and manage real-time streaming jobs with Flink’s DataStream API.

• Implement windowing strategies for event-time and processing-time analytics.

• Use Flink with Kafka, JDBC, and Elasticsearch for end-to-end data pipelines.

• Handle checkpointing, savepoints, and stateful processing.

• Deploy Flink jobs on local clusters, YARN, or Kubernetes.

Course Syllabus

Module 1: Introduction to Stream Processing

• Batch vs Stream Processing

• Why Flink? Use Cases

Module 2: Flink Architecture and Environment Setup

• Job Manager and Task Manager

• Setting Up Flink Locally

Module 3: DataStream API Fundamentals

• Source, Transformations, and Sinks

• Stateless vs Stateful Operators

Module 4: Event Time and Watermarks

• Time Characteristics

• Watermark Strategies

Module 5: Windowed Operations

• Tumbling, Sliding, and Session Windows

• Window Aggregations

Module 6: Managing State and Fault Tolerance

• State Backends

• Checkpointing and Savepoints

Module 7: Flink SQL and Table API

• Writing SQL Queries

• Joining Streams and Tables

Module 8: Integration with Kafka and JDBC

• Reading/Writing to Kafka

• Sink to JDBC, Elasticsearch

Module 9: Projects and Real-World Use Cases

• IoT Metrics Dashboard

• Fraud Detection

• Log Monitoring System

Module 10: Deployment and Monitoring

• Flink on YARN/Kubernetes

• Metrics and Logging

• Best Practices for Production

Module 11: Flink Interview Questions & Answers

• Key Concepts

• Troubleshooting Tips

• Design Patterns

Upon successful completion, learners will receive a Uplatz Certificate of Completion in Apache Flink. This certification proves your ability to implement, manage, and deploy real-time data pipelines and is a valuable credential for roles like Streaming Data Engineer, Big Data Architect, or Real-Time Systems Developer.

With real-time data becoming the standard, Apache Flink skills are in high demand. This course prepares you for roles such as:

• Streaming Data Engineer

• Data Pipeline Developer

• Real-Time Analytics Specialist

• Big Data Developer

• Software Engineer (Stream Processing)

You’ll find opportunities across tech companies, finance, IoT, e-commerce, and logistics.

1. What is Apache Flink and how does it compare with Apache Spark Streaming?
   Answer: Apache Flink is a distributed stream processing engine designed for high-throughput, low-latency data processing on unbounded (streaming) and bounded (batch) data. Unlike Spark Streaming, which operates in micro-batches, Flink provides true stream processing with event-at-a-time handling. This allows for lower latency and better support for stateful computations and event-time processing.

2. How does Flink ensure fault tolerance in streaming jobs?
   Answer: Flink achieves fault tolerance using a mechanism called checkpointing. During checkpoints, the state of the job is saved to durable storage (like HDFS or S3). In case of failure, Flink can recover from the latest successful checkpoint. Additionally, Flink supports savepoints for manually triggered state backups and exactly-once or at-least-once delivery guarantees.

3. What is the difference between processing time and event time in Flink?
   Answer:

   • Processing time is the time when data is processed on the machine running Flink.

   • Event time is the time embedded in the data itself (e.g., timestamp of an event).
     Flink supports both modes but encourages using event time for more accurate and deterministic results in time-based operations like windowing.

4. Explain the role of watermarks in Apache Flink.
   Answer: Watermarks are a key concept in event-time processing. They act as a progress indicator for event time and help Flink handle out-of-order data. A watermark tells Flink that no more events with timestamps earlier than the watermark should arrive. This enables the engine to trigger window computations correctly even when data arrives late.

5. How are stateful operations handled in Flink?
   Answer: Flink allows operators to maintain state during stream processing. This state is fault-tolerant and can be either keyed state (specific to a key in a keyed stream) or operator state (shared across parallel operator instances). Flink manages this state using backends like RocksDB or HeapStateBackend and persists it during checkpoints.

6. What are the key components of Flink’s architecture?
   Answer:

   • JobManager: Manages job coordination, scheduling, and checkpointing.

   • TaskManager: Executes tasks (operators) and manages local state and buffers.

   • Dispatcher and ResourceManager: Used in Flink’s newer deployment modes (e.g., Kubernetes/YARN) for handling job submissions and resource allocation.

7. How do you deploy and monitor Flink jobs in production?
   Answer: Flink jobs can be deployed in standalone, YARN, Kubernetes, or cloud-native environments. Monitoring is done via the Flink Web UI, logs, metrics (integrated with Prometheus or Grafana), and alerts. Job restarts, checkpoints, and performance can be managed through the UI or REST API.

8. What are Flink’s windowing strategies and when would you use each?
   Answer: Flink offers several types of windows:

   • Tumbling Windows: Fixed-size, non-overlapping intervals.

   • Sliding Windows: Fixed-size, overlapping windows that slide at a configured interval.

   • Session Windows: Dynamic, based on gaps in event time.
     Use tumbling for periodic summaries, sliding for rolling averages, and session windows for user activity tracking with inactivity gaps.

9. How can you integrate Flink with Kafka and JDBC?
   Answer: Flink provides connectors for Kafka and JDBC:

   • Kafka: Used as both source and sink for real-time data streams. FlinkKafkaConsumer and FlinkKafkaProducer classes manage this integration.

   • JDBC: Sink connector writes processed results to relational databases. Flink handles connection pooling, batching, and retries.

10. What’s the difference between the DataStream API and Table API in Flink?
    Answer:

    • DataStream API offers low-level, programmatic control over stream transformations and is ideal for complex logic.

    • Table API (along with Flink SQL) is a declarative API used to express queries on streaming/batch data similar to SQL.
      Table API simplifies development for analytics-heavy workloads, while DataStream API is more flexible and customizable for engineering tasks.

Q1. What are the payment options?
A1. We have multiple payment options: 1) Book your course on our webiste by clicking on Buy this course button on top right of this course page 2) Pay via Invoice using any credit or debit card 3) Pay to our UK or India bank account 4) If your HR or employer is making the payment, then we can send them an invoice to pay.

Q2. Will I get certificate?
A2. Yes, you will receive course completion certificate from Uplatz confirming that you have completed this course with Uplatz. Once you complete your learning please submit this for to request for your certificate https://training.uplatz.com/certificate-request.php

Q3. How long is the course access?
A3. All our video courses comes with lifetime access. Once you purchase a video course with Uplatz you have lifetime access to the course i.e. forever. You can access your course any time via our website and/or mobile app and learn at your own convenience.

Q4. Are the videos downloadable?
A4. Video courses cannot be downloaded, but you have lifetime access to any video course you purchase on our website. You will be able to play the videos on our our website and mobile app.

Q5. Do you take exam? Do I need to pass exam? How to book exam?
A5. We do not take exam as part of the our training programs whether it is video course or live online class. These courses are professional courses and are offered to upskill and move on in the career ladder. However if there is an associated exam to the subject you are learning with us then you need to contact the relevant examination authority for booking your exam.

Q6. Can I get study material with the course?
A6. The study material might or might not be available for this course. Please note that though we strive to provide you the best materials but we cannot guarantee the exact study material that is mentioned anywhere within the lecture videos. Please submit study material request using the form https://training.uplatz.com/study-material-request.php

Q7. What is your refund policy?
A7. Please refer to our Refund policy mentioned on our website, here is the link to Uplatz refund policy https://training.uplatz.com/refund-and-cancellation-policy.php

Q8. Do you provide any discounts?
A8. We run promotions and discounts from time to time, we suggest you to register on our website so you can receive our emails related to promotions and offers.

Q9. What are overview courses?
A9. Overview courses are 1-2 hours short to help you decide if you want to go for the full course on that particular subject. Uplatz overview courses are either free or minimally charged such as GBP 1 / USD 2 / EUR 2 / INR 100

Q10. What are individual courses?
A10. Individual courses are simply our video courses available on Uplatz website and app across more than 300 technologies. Each course varies in duration from 5 hours uptop 150 hours. Check all our courses here https://training.uplatz.com/online-it-courses.php?search=individual

Q11. What are bundle courses?
A11. Bundle courses offered by Uplatz are combo of 2 or more video courses. We have Bundle up the similar technologies together in Bundles so offer you better value in pricing and give you an enhaced learning experience. Check all Bundle courses here https://training.uplatz.com/online-it-courses.php?search=bundle

Q12. What are Career Path programs?
A12. Career Path programs are our comprehensive learning package of video course. These are combined in a way by keeping in mind the career you would like to aim after doing career path program. Career path programs ranges from 100 hours to 600 hours and covers wide variety of courses for you to become an expert on those technologies. Check all Career Path Programs here https://training.uplatz.com/online-it-courses.php?career_path_courses=done

Q13. What are Learning Path programs?
A13. Learning Path programs are dedicated courses designed by SAP professionals to start and enhance their career in an SAP domain. It covers from basic to advance level of all courses across each business function. These programs are available across SAP finance, SAP Logistics, SAP HR, SAP succcessfactors, SAP Technical, SAP Sales, SAP S/4HANA and many more Check all Learning path here https://training.uplatz.com/online-it-courses.php?learning_path_courses=done

Q14. What are Premium Career tracks?
A14. Premium Career tracks are programs consisting of video courses that lead to skills required by C-suite executives such as CEO, CTO, CFO, and so on. These programs will help you gain knowledge and acumen to become a senior management executive.

Q15. How unlimited subscription works?
A15. Uplatz offers 2 types of unlimited subscription, Monthly and Yearly. Our monthly subscription give you unlimited access to our more than 300 video courses with 6000 hours of learning content. The plan renews each month. Minimum committment is for 1 year, you can cancel anytime after 1 year of enrolment. Our yearly subscription gives you unlimited access to our more than 300 video courses with 6000 hours of learning content. The plan renews every year. Minimum committment is for 1 year, you can cancel the plan anytime after 1 year. Check our monthly and yearly subscription here https://training.uplatz.com/online-it-courses.php?search=subscription

Q16. Do you provide software access with video course?
A16. Software access can be purchased seperately at an additional cost. The cost varies from course to course but is generally in between GBP 20 to GBP 40 per month.

Q17. Does your course guarantee a job?
A17. Our course is designed to provide you with a solid foundation in the subject and equip you with valuable skills. While the course is a significant step toward your career goals, its important to note that the job market can vary, and some positions might require additional certifications or experience. Remember that the job landscape is constantly evolving. We encourage you to continue learning and stay updated on industry trends even after completing the course. Many successful professionals combine formal education with ongoing self-improvement to excel in their careers. We are here to support you in your journey!

Q18. Do you provide placement services?
A18. While our course is designed to provide you with a comprehensive understanding of the subject, we currently do not offer placement services as part of the course package. Our main focus is on delivering high-quality education and equipping you with essential skills in this field. However, we understand that finding job opportunities is a crucial aspect of your career journey. We recommend exploring various avenues to enhance your job search:
a) Career Counseling: Seek guidance from career counselors who can provide personalized advice and help you tailor your job search strategy.
b) Networking: Attend industry events, workshops, and conferences to build connections with professionals in your field. Networking can often lead to job referrals and valuable insights.
c) Online Professional Network: Leverage platforms like LinkedIn, a reputable online professional network, to explore job opportunities that resonate with your skills and interests.
d) Online Job Platforms: Investigate prominent online job platforms in your region and submit applications for suitable positions considering both your prior experience and the newly acquired knowledge. e.g in UK the major job platforms are Reed, Indeed, CV library, Total Jobs, Linkedin.
While we may not offer placement services, we are here to support you in other ways. If you have any questions about the industry, job search strategies, or interview preparation, please dont hesitate to reach out. Remember that taking an active role in your job search process can lead to valuable experiences and opportunities.

Q19. How do I enrol in Uplatz video courses?
A19. To enroll, click on "Buy This Course," You will see this option at the top of the page.
a) Choose your payment method.
b) Stripe for any Credit or debit card from anywhere in the world.
c) PayPal for payments via PayPal account.
d) Choose PayUmoney if you are based in India.
e) Start learning: After payment, your course will be added to your profile in the student dashboard under "Video Courses".

Q20. How do I access my course after payment?
A20. Once you have made the payment on our website, you can access your course by clicking on the "My Courses" option in the main menu or by navigating to your profile, then the student dashboard, and finally selecting "Video Courses".

Q21. Can I get help from a tutor if I have doubts while learning from a video course?
A21. Tutor support is not available for our video course. If you believe you require assistance from a tutor, we recommend considering our live class option. Please contact our team for the most up-to-date availability. The pricing for live classes typically begins at USD 999 and may vary.