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Kafka Online Test

The Kafka Online Test is preferred by recruiters to assess on-the-job skills of candidates before an interview. It reduces technical screening time by 80% by enabling employers to identify qualified candidates.

Customized Based On:

  • Experience/ difficulty level
  • Multiple skills in 1 assessment
  • Job description/ role requirements

Covered Topics:

Kafka Offsets
Log Retention
Kafka Tools
In-Synced Replica
Kafka Clusters
See full list
Singapore government logo

The hiring managers felt that through the technical questions that they asked during the panel interviews, they were able to tell which candidates had better scores, and differentiated with those who did not score as well. They are highly satisfied with the quality of candidates shortlisted with the Adaface screening.

Human Resources Manager

Singapore Government

reduction in screening time

Sample Kafka Online Test Questions

These are just a small sample from our library of 10,000+ questions. The actual questions on this Kafka Online Test will be non-googleable.

🧐 Question🔧 Skill💪 Difficulty⌛ Time
onCompletion method call
Do you know when the onCompletion() method is called?


  • When send() method is called
  • When message is serialized successfully
  • When broker response is received
  • Never
  • Insufficient information
KafkaEasy2 min
Topics and partitions
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?


  • Do a KStream/KTable Join after repartition
  • Repartition topic to have 5 partitions
  • Model Customer as a GlobalKTable
  • None of these will work
KStream Partition
KafkaEasy2 min
What is an adequate topic configuration for the topic word-count-output?


  • compression.type = Iz4
  • cleanup.policy = delete
  • cleanup.policy = compress
  • cleanup.policy = compact
KafkaMedium2 min

How to use the Adaface Kafka Online Test

Start screening candidates within minutes with the ready-to-go Kafka Online Test

1. Choose the most appropriate test for your role

2. Start inviting candidates to complete the assessment

3. Receive real time notifications and shortlist the best candidates

Customize the Adaface Kafka Online Test according to your job description

1. Get a custom assessment from our library of 500+ skills within 48 hours

2. Start inviting candidates to complete the assesment

3. Receive real time notifications and shortlist the best candidates

Adaface Kafka Online Test is trusted by enterprises worldwide

Morgan Stanley
SG Government
Ernst and Young
Optimum Solutions
United Nations
Love Bonito

About the Adaface Kafka Assessment Test

Evaluate Kafka technical and coding skills with Adaface skills assessment platform powered by an intelligent chatbot


In a queuing, a pool of consumers may read message from the server and each message goes to one of them.

Kafka server

ISR stands for In sync replicas. They are as a set of message replicas which are synched to be leaders.


Replication of message in Kafka ensures that any published message does not get lost and can be consumed in case of machine error, program error or software upgrades.

Message offset
Kafka Producer API
Partitioning Key

The messages in partitions are given a sequential ID known as an offset, and the offset is used to identify each message in the partition uniquely.


Kafka MirrorMaker provides geo-replication support for your clusters.


In this model, messages are broadcasted to all consumers Kafka caters single consumer abstraction that generalized both of the above- the consumer group

Avoiding duplication
Consumer Group
Record headers
MQ connectors
Elastic Search connectors
JDBC connectors
File stream connector
JMS source connectors
Kafka Rest proxy
Redundancy cluster

Recommended Roles:

Hadoop Developer with Kafka
Kafka Developer

Why You Should Use This Kafka Online 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 expensive engineering time by filtering out unqualified candidates.

The Adaface Kafka online test screens candidates for the typical skills recruiters look for in a Kafka developer:

  • Understanding of message delivery and durability guarantees
  • Experience working with producer API
  • Experience using Record headers
  • Familiarity with command line tools
  • Expertise in Kafka brokers, zookeepers, KSQL, KStream and Kafka Control center
  • Hands on experience working on Kafka connectors such as MQ connectors, Elastic Search connectors, JDBC connectors, File stream connector, JMS source connectors, Tasks, Workers, converters, Transforms

The insights generated from this assessment can be used by recruiters and hiring managers to identify the best candidates for the role. Anti-cheating features enable you to be comfortable with conducting assessments online. The Kafka developer test is ideal for helping recruiters identify which candidates have the technical skills to do well on the job.

The Kafka Online Test helps you screen candidates- interview only candidates with proven hands-on technical expertise in Kafka development and programming. The idea behind this online Kafka quiz is to help you assess on-the-job Kafka concepts, coding and debugging skills with just one test.

About The Kafka Developer Role

Apache Kafka is a framework implementation of a software bus using stream-processing. Apache Kafka® is an event streaming platform used by more than 30% of the Fortune 500 today.

Kafka is primarily used to build real-time streaming data pipelines and applications that adapt to the data streams. It combines messaging, storage, and stream processing to allow storage and analysis of both historical and real-time data.

Typical Kafka Developer responsibilities include:

  • Perform independent functional and technical analysis for major projects
  • Perform data related benchmarking, performance analysis and tuning
  • Recommend best approach suited for data movement from different sources to HDFS using Apache/Confluent Kafka
  • Develop, enhance and maintain web applications
  • Lead the identification, isolation, resolution and communication of problems within the production environment
  • Perform code and unit testing for complex scope modules, and projects

Distribution Of Test Scores

The actual score distribution will vary based on your candidate pipeline quality, but you should typically expect ~20% of the candidates to do well on Adaface assessments.

The score distribution for our assessments follow the normal curve. This is a good sign- standardized tests like SAT and GRE follow the normal distribution (bell curve).

Status quo assessments typically have the exact opposite of the bell curve (too many candidates getting close to 0, too many candidates getting close to 100 and too few candidates in the middle). This is typically because they focus on theoretical questions or trick questions, which are very binary in nature- either you know the trick/ theory or you don’t.

How Adaface Is Different

Adaface conversational assessments are reflective of on-the-job skills and see an 86% completion rate as compared to ~50% for traditional assessment platforms.



Theoretical questions/ puzzles

Feels like a test

One-size-fits-all assessments




Questions for on-the-job skills





What is a custom assessment?

Every role is different and requires a custom assessment to identify top candidates efficiently. Adaface subject matter experts understand your job description/ role requirements and pick the most relevant questions from our library of 10000+ questions to create a technical assessment that helps you find the qualified candidates in your candidate pipeline quickly. All custom assessments are set up based on the job description, role requirements, must-have skills, experience level and salary range within a maximum of 48 hours and you will get an email notification once it goes live.

Check out a sample assessment here (no credit card required).

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.

How is Adaface different from other assessment tools?

We believe that status quo tech assessment platforms are not a fair way for companies to evaluate engineers because they focus on trick questions/ puzzles/ niche algorithms. We started Adaface to help companies find great engineers by assessing on-the-job skills required for a role. Read more about why we started Adaface.

Here's what's different with Adaface:

  • High quality non-googleable questions that test for on-the-job skills as opposed to theoretical knowledge.
  • A friendly conversational assessment with a chatbot, instead of sending a "test" to a candidate. This translates to a higher completion rate. Adaface assessments (86% candidate completion rate), as opposed to traditional tests (40-50% candidate completion rate)
  • Customized assessments for 700+ skills at different experience levels.

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

We have the following anti-cheating features in place:

  • Web proctoring
  • Webcam proctoring
  • Plagairism detection
  • Non-googleable questions
  • Secure browser

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?

The platform is completely self-serve, so here's one way to proceed:

  • You can sign up for free to get a feel for how it works.
  • The free trial includes one sample assessment (Java/ JavaScript) that you will find in your dashboard when you sign up. You can use it to review the quality of questions, and the candidate experience of a conversational test on Adaface.
  • To review the quality of questions, you can also review our public questions for 50+ skills here.
  • Once you're convinced that you want to try it out with real assessments and candidates, you can pick a plan according to your requirements.

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.

With Adaface, we were able to optimise our initial screening process by upwards of 75%, freeing up precious time for both hiring managers and our talent acquisition team alike!

Brandon Lee, Head of People, Love, Bonito

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