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Apache Cassandra Online Test

The Apache Cassandra 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:

Tombstone expiration
Bloom filter
Starved stables
Data caches
the Consistency level
Commitlog sync
Selection clause
See full list
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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 Apache Cassandra Online Test Questions

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

🧐 Question🔧 Skill💪 Difficulty⌛ Time
Load/migrate data
Rinsha works at a private equity fund, where they have subscribed to feeds from several companies that track startups. The feeds are delivered in multiple formats such as CSV files, access to their RDBMS or NOSQL (Cassandra) database or daily incremental data. What should Rinsha use in Cassandra to load/ migrate data from one Cassandra cluster to another?


  • CQL INSERT command
  • CQL COPY command
  • Load CSV file directly
  • sstableloader
  • None of these
  • Any of these
CassandraEasy2 min
Replication on nodes
The startup Ro is working at has a Cassandra cluster (Ring) with 7 nodes, and the admin set up a new KeySpace named CoralKeySpace. Ro wants to insert configuration data for their mobile application named CoralApp. The admin has told Ro that the default Replication Factor is 3 on this cluster for CoralKeySpace. Ro inserted 40 records in a table of CoralKeySpace. Which of the following apply?
A: Before the insert query, Ro needs to execute a replicate-all command using cqlsh for the session, so that the data can be replicated on 3 nodes. 
B: After the insert query, Ro needs to execute a replicate-all command using cqlsh, so that the data can be replicated on 3 nodes.
C: Ro does not need to do anything, replication is taken care of by Cassandra.


  • A
  • B
  • A or B
  • C
CassandraMedium2 min

How to use the Adaface Apache Cassandra Online Test

Start screening candidates within minutes with the ready-to-go Apache Cassandra 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 Apache Cassandra 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 Apache Cassandra Online Test is trusted by enterprises worldwide

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

About the Adaface Apache Cassandra Assessment Test

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


NoSQL Database
Key Value Store
Document Store
Column Store
Graph Databases
Key-Value Store DB
Document Store DB
Column Store DB
Graph DB
Conceptual Data Model
Logical Data Model
Physical Data Model
Database Elements

Main configuration file for Cassandra

Durable Writes
Replication Factor
Replication Strategy
Simple Strategy
Network Topology Strategy
Column Family
Primary Key
Compound Primary Key
Single Primary Key
Composite Partitioning Key
Static CQL Table
Dynamic CQL Table
Gossip Protocol

In-memory data structure that corresponds to a CQL table


Contents of the memtable are flushed to disk in a file called an SSTable


crash-recovery mechanism that supports Cassandra’s durability goals

Commit Log
Coordinator Node
Read Operation
Merkel Tree
Logging Levels
Nodetool Utility

Recommended Roles:

Java Developer
Data Science Developer

Why You Should Use This Apache Cassandra Online Test

The Apache Cassandra 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.

The Adaface Apache Cassandra Online Test screens candidates for the typical skills recruiters look for Cassandra Developer roles:

  • Experience with Cassandra
  • Familiarity with Linux Shell Scripting
  • Experience with Java or Python
  • Experience managing production infrastructure, tuning and automation
  • Knowledge of with DevOps tools

The insights generated from this assessment can be used by recruiters and hiring managers to identify the best candidates for Cassandra Developer roles. Anti-cheating features enable you to be comfortable with conducting assessments online. The Apache Cassandra Online Test is ideal for helping recruiters identify which candidates have the skills to do well on the job.

About Apache Cassandra Developer Roles

Apache Cassandra is an open-source NoSQL DBMS designed specifically for handling a high volume of data with the help of its distributed architecture. First developed at Facebook for its internal organization usage, Cassandra DBMS is faster than the traditional RDBMS.

A Cassandra developer is in charge of duties related to the Apache Cassandra NoSQL database management system. A excellent Cassandra developer is well-versed in database management systems and has an analytical, problem-solving approach.

Typical Cassandra Developer responsibilities include:

  • Managing and supporting Production DataStax cluster and related processes
  • Building Code as Infrastructure Pipelines using AWS cloud services
  • Participating in standard SDLC process using agile methodology and test-driven approach

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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