Kafka Online Test

Q: What are the main Messaging and Streaming tests?

The main Messaging and Streaming tests are: Kafka Online Test RabbitMQ Test Spark Test

The Kafka Online Test uses scenario-based MCQs to evaluate candidates on their knowledge of Apache Kafka, including their proficiency in working with message queue, stream processing, and distributed systems. The test also evaluates a candidate's familiarity with Kafka producer and consumer workflows, partitioning and replication, and performance optimization. The test aims to evaluate a candidate's ability to work with Kafka effectively and design and develop scalable and fault-tolerant messaging systems that meet real-time data processing requirements.

Covered skills:

Kafka Offsets
In-Synced Replica
Kafka Clusters
Distributed Systems
Event Streaming
Message Queues
Data Pipelines
Stream Processing
Fault Tolerance
Scalability
Data Replication

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About the Kafka Test

The Kafka Online Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

Understanding and working with Kafka Offsets
Understanding and managing In-Synced Replica
Configuring and maintaining Kafka Clusters
Designing and implementing Distributed Systems using Kafka
Utilizing Event Streaming with Kafka
Working with Message Queues in Kafka
Building and maintaining Data Pipelines with Kafka
Implementing Stream Processing using Kafka
Ensuring Fault Tolerance in Kafka
Scaling Kafka for high-volume data
Understanding Data Replication in Kafka

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Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

How we design questions

These are just a small sample from our library of 15,000+ questions. The actual questions on this Kafka Online Test will be non-googleable.

🧐 Question
Medium onCompletion method call Kafka Callbacks Kafka Event Handling	Solve
Do you know when the onCompletion() method is called?
Easy Topics and partitions KStream Partition Data Integration Streaming Data Processing	Solve
Our ecommerce website, Dove Bonito maintains two topics: 1 high volume topic, "purchase" with 5 partitions and 1 low volume topic "customer" with 3 partitions. The team wants to do a stream-table join of these topics. What would you recommend?
Medium word-count-output	Solve
What is an adequate topic configuration for the topic word-count-output?

	🧐 Question	🔧 Skill
	Medium onCompletion method call Kafka Callbacks Kafka Event Handling	2 mins Kafka	Solve
Do you know when the onCompletion() method is called?
	Easy Topics and partitions KStream Partition Data Integration Streaming Data Processing	2 mins Kafka	Solve
Our ecommerce website, Dove Bonito maintains two topics: 1 high volume topic, "purchase" with 5 partitions and 1 low volume topic "customer" with 3 partitions. The team wants to do a stream-table join of these topics. What would you recommend?
	Medium word-count-output	2 mins Kafka	Solve
What is an adequate topic configuration for the topic word-count-output?

	🧐 Question	🔧 Skill	💪 Difficulty	⌛ Time
	onCompletion method call Kafka Callbacks Kafka Event Handling	Kafka	Medium	2 mins	Solve
Do you know when the onCompletion() method is called?
	Topics and partitions KStream Partition Data Integration Streaming Data Processing	Kafka	Easy	2 mins	Solve
Our ecommerce website, Dove Bonito maintains two topics: 1 high volume topic, "purchase" with 5 partitions and 1 low volume topic "customer" with 3 partitions. The team wants to do a stream-table join of these topics. What would you recommend?
	word-count-output	Kafka	Medium	2 mins	Solve
What is an adequate topic configuration for the topic word-count-output?

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Swayam Narain, CTO, Affable

Why you should use Pre-employment Kafka Online Test?

The Kafka Online Test makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects:

Understanding and working with Kafka Offsets
Knowledge of In-Synced Replica in Kafka
Experience in managing and troubleshooting Kafka Clusters
Understanding of Distributed Systems and their application in Kafka
Proficiency in Event Streaming concepts and their implementation in Kafka
Knowledge of Message Queues and their usage in Kafka
Experience in building and managing Data Pipelines using Kafka
Working knowledge of Stream Processing in Kafka
Understanding and implementing Fault Tolerance in Kafka
Ability to design and scale Kafka for high Scalability

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

What topics are covered in the Kafka Online Test?

Kafka Offsets: Kafka Offsets refer to the unique identifier assigned to each message in a Kafka topic. They act as a pointer to the position of a specific message within a partition. Measuring this skill allows recruiters to assess the candidate's understanding of data persistence and message ordering in Kafka.

In-Synced Replica: An In-Synced Replica in Kafka is a replica that is synchronized with the leader replica for a particular partition. These replicas are considered in-good-state and are used for consistent and reliable message delivery. Measuring this skill helps recruiters evaluate the candidate's knowledge of replica synchronization, data consistency, and fault tolerance in Kafka.

Kafka Clusters: A Kafka Cluster consists of multiple Kafka Brokers working together to form a scalable and fault-tolerant messaging system. It provides high availability, fault tolerance, and horizontal scalability for handling large volumes of data streams. Measuring this skill enables recruiters to assess the candidate's understanding of cluster management, replication, and data distribution in Kafka.

Distributed Systems: A Distributed System is a collection of independent components that work together to achieve a common goal. In the context of Kafka, understanding distributed systems is crucial as Kafka is designed to handle large-scale event streams and distributed processing. Measuring this skill allows recruiters to evaluate the candidate's familiarity with distributed system concepts such as scalability, fault tolerance, and data consistency.

Event Streaming: Event Streaming involves the continuous and real-time processing of data events. In Kafka, events are represented as messages and are processed using Kafka's publish-subscribe model. Measuring this skill helps recruiters assess the candidate's knowledge of streaming data architectures, event-driven systems, and real-time data processing.

Message Queues: Message Queues provide a way to decouple producers and consumers in a distributed system. In Kafka, message queues are implemented as topics where messages are stored and can be consumed by multiple consumers. Measuring this skill allows recruiters to evaluate the candidate's understanding of message-oriented architectures, decoupling of components, and asynchronous communication patterns.

Data Pipelines: Data Pipelines are the systems and processes used to extract, transform, and load (ETL) data from various sources to a destination. In Kafka, data pipelines can be built using various components such as sources, connectors, and sinks. Measuring this skill enables recruiters to assess the candidate's knowledge of data ingestion, transformation, and streaming data integration using Kafka.

Stream Processing: Stream Processing involves the real-time computation and analysis of data streams. In Kafka, stream processing can be performed using Kafka Streams or other stream processing frameworks. Measuring this skill helps recruiters evaluate the candidate's familiarity with stream processing concepts, such as windowing, aggregation, and stateful processing, in the context of Kafka.

Fault Tolerance: Fault Tolerance refers to the ability of a system to continue functioning even in the presence of hardware failures, software errors, or other unexpected events. In Kafka, fault tolerance is achieved through data replication, leader election, and recovery mechanisms. Measuring this skill allows recruiters to assess the candidate's understanding of fault-tolerant architectures, error handling, and data durability in Kafka.

Scalability: Scalability is the ability of a system to handle increasing workloads by adding resources or scaling horizontally. In Kafka, scalability is achieved through partitioning, distributed processing, and parallelism. Measuring this skill enables recruiters to evaluate the candidate's knowledge of designing and managing scalable systems for handling high-throughput data streams in Kafka.

Data Replication: Data Replication is the process of creating and maintaining copies of data in multiple locations for redundancy and availability. In Kafka, data replication is used to ensure durability and fault tolerance. Measuring this skill allows recruiters to assess the candidate's understanding of replication strategies, consistency models, and data integrity in Kafka.

Full list of covered topics

The actual topics of the questions in the final test will depend on your job description and requirements. However, here's a list of topics you can expect the questions for Kafka Online Test to be based on.

Kafka Topics

Kafka Producers

Kafka Consumers

Kafka Connect

Kafka Streams

Kafka API

Kafka Partitioning

Kafka Replication

Kafka Offset Commit

Kafka Offset Reset

Kafka Configurations

Kafka Cluster Management

Kafka Cluster Scaling

Kafka Cluster Expansion

Kafka Cluster Monitoring

In-Sync Replica

Kafka Cluster Performance

Kafka Cluster Security

Kafka Cluster Resilience

Event-Driven Architectures

Event Serialization and Deserialization

Message Queue Concepts

Message Queue Mechanisms

Message Queue Design Patterns

Data Pipeline Architectures

Data Integration with Kafka

Developing with Kafka Streams

Stream Analytics with Kafka

Processing Guarantees in Kafka

Kafka Fault Handling

Kafka Performance Tuning

Scalability in Kafka

Kafka Partition Assignment

Kafka Data Replication

Kafka Mirroring

Data Backup and Recovery in Kafka

Kafka Monitoring and Alerting

Kafka Security Best Practices

Kafka Admin Operations

Kafka Data Compression

Kafka Data Encryption

Kafka Authentication and Authorization

Kafka Message Serialization

Kafka Message Compression

Kafka Message Routing

Kafka Message Retry

Kafka Error Handling

Kafka Message Delays

Kafka Message Filtering

Kafka Event Ordering

Kafka Event Timestamping

Kafka Event Replay

Kafka Event Eviction

What roles can I use the Kafka Online Test for?

Kafka Developer
Kafka Administrator
Senior Kafka Developer

How is the Kafka Online Test customized for senior candidates?

For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This might include adding questions on topics like

Knowledge of Data Replication techniques in Kafka
Experience in working with Kafka Connect and its various connectors
Familiarity with Kafka Streams and its usage for real-time processing
Understanding and applying Kafka Security mechanisms
Proficiency in monitoring and optimizing Kafka performance
Experience in handling and managing Kafka Topics and Partitions
Knowledge of Kafka Message Serialization and Deserialization
Understanding and implementing Kafka Message Compression techniques
Experience in integrating Kafka with other Big Data technologies like Hadoop and Spark
Proficiency in managing Kafka Consumers and Producers for efficient data processing

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Have questions about the Kafka Hiring Test?

What is the Kafka Online Test?

The Kafka Online Test evaluates candidates' skills in managing and utilizing Apache Kafka. It is used by recruiters to assess proficiency in Kafka-related tasks and ensure the right hiring decisions.

Can I combine the Kafka Online Test with other skills like AWS?

Yes, recruiters can request a custom test that combines Kafka and AWS skills. For more details on assessing AWS skills, you can refer to our AWS Online Test.

What skills are evaluated in the Kafka Online Test?

The Kafka Online Test covers topics such as Kafka Offsets, In-Synced Replica, Kafka Clusters, Distributed Systems, Event Streaming, Message Queues, Data Pipelines, Stream Processing, Fault Tolerance, Scalability, and Data Replication.

How to use the Kafka Online Test in my hiring process?

Include this test in the early stages of your recruitment process. Share the test link in your job post or invite candidates via email. Identify the best talents quickly and effectively.

Can I test Kafka and Apache Cassandra together?

Yes, Kafka and Apache Cassandra can be tested together. This combo helps in evaluating candidates on both Kafka and Cassandra skills. For more details, you can check our Apache Cassandra Online Test.

What are the main Messaging and Streaming tests?

The main Messaging and Streaming tests are:

Can I combine multiple skills into one custom assessment?

Yes, absolutely. Custom assessments are set up based on your job description, and will include questions on all must-have skills you specify. Here's a quick guide on how you can request a custom test.

Do you have any anti-cheating or proctoring features in place?

We have the following anti-cheating features in place:

Non-googleable questions
IP proctoring
Screen proctoring
Web proctoring
Webcam proctoring
Plagiarism detection
Secure browser
Copy paste protection

Read more about the proctoring features.

How do I interpret test scores?

The primary thing to keep in mind is that an assessment is an elimination tool, not a selection tool. A skills assessment is optimized to help you eliminate candidates who are not technically qualified for the role, it is not optimized to help you find the best candidate for the role. So the ideal way to use an assessment is to decide a threshold score (typically 55%, we help you benchmark) and invite all candidates who score above the threshold for the next rounds of interview.

What experience level can I use this test for?

Each Adaface assessment is customized to your job description/ ideal candidate persona (our subject matter experts will pick the right questions for your assessment from our library of 10000+ questions). This assessment can be customized for any experience level.

Does every candidate get the same questions?

Yes, it makes it much easier for you to compare candidates. Options for MCQ questions and the order of questions are randomized. We have anti-cheating/ proctoring features in place. In our enterprise plan, we also have the option to create multiple versions of the same assessment with questions of similar difficulty levels.

I'm a candidate. Can I try a practice test?

No. Unfortunately, we do not support practice tests at the moment. However, you can use our sample questions for practice.

What is the cost of using this test?

You can check out our pricing plans.

Can I get a free trial?

Yes, you can sign up for free and preview this test.

I just moved to a paid plan. How can I request a custom assessment?

Here is a quick guide on how to request a custom assessment on Adaface.

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Along with scorecards that report the performance of the candidate in detail, you also receive a comparative analysis against the company average and industry standards.

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