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About the test:

The Apache Cassandra Online Test uses scenario-based multiple-choice questions to evaluate candidates on their knowledge and understanding of the distributed NoSQL database management system, Apache Cassandra. The test aims to assess candidates' proficiency in areas such as data modeling, query language (CQL), cluster architecture, replication, data consistency, and performance optimization. It measures their ability to design, deploy, and manage Cassandra clusters in various use cases and their understanding of Cassandra's security and scalability features.

Covered skills:

  • Data Model and DML Operations
  • Data Modeling Best Practices
  • Data Replication and Consistency
  • Performance Tuning and Optimization
  • Security and Authentication
  • Cassandra Query Language (CQL)
  • Partitioning and Distribution
  • Cassandra Architecture and Internals
  • Backup and Recovery

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9 reasons why
9 reasons why

Adaface Apache Cassandra Test is the most accurate way to shortlist Cassandra Developers

Reason #1

Tests for on-the-job skills

The Apache Cassandra 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:

  • Ability to design efficient data models in Apache Cassandra
  • Proficiency in Cassandra Query Language (CQL) for performing data manipulation
  • Understanding of Cassandra's architecture and internals
  • Knowledge of data partitioning and distribution strategies in Cassandra
  • Familiarity with data replication and consistency in Cassandra
  • Experience in performance tuning and optimization techniques in Cassandra
  • Ability to design and implement a backup and recovery strategy in Cassandra
  • Understanding of security and authentication mechanisms in Cassandra
  • Knowledge of data modeling best practices in Cassandra
  • Proficiency in handling exceptions and errors in Cassandra
  • Understanding the basics of Apache Cassandra and its use cases
  • Awareness of data modeling techniques for efficient storage and retrieval
  • Familiarity with the various CQL data types and their usage
  • Ability to tune Cassandra configurations for optimal performance
  • Knowledge of data distribution strategies for high availability and fault tolerance
  • Understanding of consistency levels and their impact on data integrity
Reason #2

No trick questions

no trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

View sample questions

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface
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Reason #3

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 10,000+ questions. The actual questions on this Apache Cassandra Online Test will be non-googleable.

🧐 Question


Load/migrate data
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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?


Read Repair and Data Retrieval Mechanics
Consistency Level
Data Retrieval
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You're a system architect troubleshooting read inconsistencies on a globally distributed Cassandra cluster. A developer informs you that sometimes when reading data, outdated information is retrieved. You decide to dive deeper into the read path.

The application reads data using the following CQL:
Given the known facts:

1. The cluster spans three data centers.
2. The replication factor is set as 3 for each data center.
3. The read must return only after fetching data from 2 nodes in each data center.
4. You want to utilize the read repair mechanism to address the inconsistencies.

Which consistency level should replace the '?' in the `SELECT` statement to ensure the above requirements?


Replication on nodes
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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.
🧐 Question🔧 Skill


Load/migrate data

2 mins

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Read Repair and Data Retrieval Mechanics
Consistency Level
Data Retrieval

2 mins

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Replication on nodes

2 mins

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🧐 Question🔧 Skill💪 Difficulty⌛ Time
Load/migrate data
Easy2 mins
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Read Repair and Data Retrieval Mechanics
Consistency Level
Data Retrieval
Medium2 mins
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Replication on nodes
Medium2 mins
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Reason #4

1200+ customers in 75 countries

customers in 75 countries

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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Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment Apache Cassandra Online Test in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Science behind Adaface tests
Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the Apache Cassandra Online Test from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

invite candidates
Reason #7

Detailed scorecards & benchmarks

View sample scorecard
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Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

test completion rate
Reason #9

Advanced Proctoring

Learn more

About the Apache Cassandra Assessment Test

Why you should use Pre-employment Apache Cassandra Online Test?

The Apache Cassandra 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 the basic concepts and principles of Apache Cassandra
  • Performing data modeling and designing efficient data models in Cassandra
  • Writing efficient CQL queries for data retrieval and manipulation
  • Applying best practices for data modeling in Cassandra
  • Understanding and implementing partitioning and distribution strategies in Cassandra
  • Configuring and managing data replication and consistency in Cassandra clusters
  • Gaining knowledge of the Cassandra architecture and internal workings
  • Identifying and implementing performance tuning techniques in Cassandra
  • Implementing backup and recovery strategies in Cassandra
  • Ensuring security and authentication in Cassandra applications

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 Apache Cassandra Online Test?

  • Data Model and DML Operations

    Data Model and DML Operations encompass the concepts and skills required to design and manipulate data in Cassandra. This skill is crucial to assess as it determines how well candidates can work with the database at a fundamental level.

  • Cassandra Query Language (CQL)

    Cassandra Query Language (CQL) is a SQL-like language used to interact with Cassandra. Measuring this skill in the test helps recruiters evaluate candidates' ability to write efficient queries, which is essential for Cassandra database management.

  • Data Modeling Best Practices

    Data Modeling Best Practices involve following industry-recommended guidelines for designing data models in Cassandra. This skill is necessary to evaluate as it assesses candidates' knowledge of optimization techniques and strategies to ensure high performance and scalability.

  • Partitioning and Distribution

    Partitioning and Distribution refer to the process of dividing data across multiple nodes in a Cassandra cluster. Including this skill in the test allows recruiters to assess candidates' understanding of how data is distributed and stored, which directly impacts the performance and fault tolerance of a Cassandra database.

  • Data Replication and Consistency

    Data Replication and Consistency pertain to the mechanisms used in Cassandra to replicate data across nodes and maintain data consistency. Evaluating this skill in the test helps recruiters gauge candidates' knowledge of replication strategies and their understanding of how consistency is achieved in a distributed database.

  • Cassandra Architecture and Internals

    Cassandra Architecture and Internals cover the underlying architecture and inner workings of the Cassandra database. This skill is important to measure as it demonstrates candidates' familiarity with the various components and mechanisms that enable Cassandra's scalability and fault tolerance.

  • Performance Tuning and Optimization

    Performance Tuning and Optimization involve identifying and implementing measures to improve the performance and efficiency of a Cassandra database. This skill should be measured in the test to evaluate candidates' ability to optimize queries, handle large data sets, and fine-tune Cassandra configurations for optimal performance.

  • Backup and Recovery

    Backup and Recovery encompass the techniques and practices used to back up and restore data in Cassandra. Measuring this skill in the test allows recruiters to determine candidates' proficiency in data backup strategies and their ability to recover data in case of failures or disasters.

  • Security and Authentication

    Security and Authentication refer to the mechanisms and procedures employed to secure a Cassandra database from unauthorized access. Including this skill in the test helps recruiters assess candidates' knowledge of authentication methods, encryption techniques, and best practices for safeguarding data in a distributed environment.

  • 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 Apache Cassandra Online Test to be based on.

    Data Model and DML Operations
    Cassandra Query Language (CQL)
    Data Modeling Best Practices
    Partitioning and Distribution
    Data Replication and Consistency
    Cassandra Architecture and Internals
    Performance Tuning and Optimization
    Backup and Recovery
    Security and Authentication
    Primary Keys
    Secondary Indexes
    Static Columns
    Clustering Columns
    Composite Keys
    Time Window Compaction Strategy
    Leveled Compaction Strategy
    Size-Tiered Compaction Strategy
    TTL (Time-To-Live)
    Batch Operations
    Data Modeling for Time-Series Data
    Data Modeling for Relational Data
    Data Distribution Strategies
    Caching and Bloom Filters
    Read and Write Path
    Hinted Handoff
    Gossip Protocol
    Repair and Anti-Entropy
    Performance Monitoring and Metrics
    Query Optimization
    Materialized Views
    Data Compression
    Node Operations
    Backup and Restore
    Datacenter Replication
    Encryption and Authorization
    Authentication and Role-Based Access Control
    SSL/TLS Configuration
    Compaction Strategies
    Memtable Tuning
    Garbage Collection Tuning
    Partition Key Selection
    Concurrency Control
    Data Distribution Schemas
    Consistency Levels
    Lightweight Transactions
    Data Auditing
    Schema Evolution
    Ring Management
    Data Center Awareness
    Token Allocation
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What roles can I use the Apache Cassandra Online Test for?

  • Cassandra Developer
  • Cassandra Solutions Architect
  • Cassandra DBA
  • Cassandra Architect
  • Cassandra Analyst

How is the Apache Cassandra 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

  • Designing and optimizing data models for high availability and fault tolerance
  • Understanding and implementing materialized views in Cassandra
  • Utilizing secondary indexes effectively in Cassandra
  • Managing compaction and compaction strategies in Cassandra
  • Implementing caching strategies for performance optimization in Cassandra
  • Monitoring and analyzing Cassandra performance metrics
  • Implementing distributed batch processing with Cassandra
  • Utilizing virtual nodes to improve cluster scalability and flexibility
  • Implementing time-series data modeling in Cassandra
  • Integrating Cassandra with other tools and technologies for data processing
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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.

reduction in screening time

Apache Cassandra Hiring Test FAQs

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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