About scylladb
Company Description
ScyllaDB is a high-performance, horizontally scalable NoSQL database designed for cloud-native applications, offering low-latency and high-throughput performance. Built to handle large volumes of data across distributed systems, ScyllaDB is compatible with Apache Cassandra but provides significantly better performance and efficiency. The company prides itself on fostering a collaborative and innovative work culture, emphasizing continuous learning and professional growth. Employees are encouraged to take ownership of their projects and contribute to the open-source community. The work environment is dynamic and fast-paced, where creativity is valued, and team collaboration is essential for success.
Software Engineer Interview Questions
Q1: Can you describe your experience with distributed systems?
I have worked on several projects where I designed and implemented distributed systems using technologies like Apache Kafka and Kubernetes. My focus was on ensuring data consistency and fault tolerance while optimizing performance.
Q2: How do you approach debugging in a distributed environment?
I utilize logging and monitoring tools like Prometheus and Grafana to track system performance. When debugging, I analyze logs systematically to identify bottlenecks, and I use tracing tools to follow requests through the system.
Q3: What programming languages are you proficient in, and how do they apply to your work?
I am proficient in Java and Python, which I have used for backend development and scripting. I prefer using Java for performance-critical applications while leveraging Python for data manipulation and analysis.
Q4: How do you ensure the scalability of an application?
I design applications with a microservices architecture, which allows components to scale independently. Additionally, I implement load balancing and caching strategies to manage increased load effectively.
Q5: Describe a project where you had to optimize database performance.
In a previous project, I identified slow queries in a Cassandra database. I used query profiling to understand performance issues and then optimized indexes and refactored queries, resulting in a 30% improvement in response times.
DevOps Engineer Interview Questions
Q1: How do you manage infrastructure as code?
I utilize tools like Terraform and Ansible to manage infrastructure as code. This approach allows me to maintain version control and automate deployment processes, ensuring consistency across environments.
Q2: What tools do you use for CI/CD pipelines?
I typically use Jenkins and GitLab CI for continuous integration and deployment. These tools help automate testing and deployment, ensuring that code changes are validated and delivered quickly.
Q3: Can you explain how you monitor applications in production?
I use monitoring tools like ELK Stack and Grafana to track application performance. I set up alerts for anomalies and regularly review logs to ensure system health and performance.
Q4: Describe your experience with containerization technologies.
I have extensive experience with Docker and Kubernetes. I use Docker for containerizing applications and Kubernetes for orchestrating those containers, allowing for easy scaling and management of microservices.
Q5: What security measures do you implement in your DevOps practices?
I prioritize security by implementing best practices such as using IAM roles, conducting vulnerability scans, and ensuring encryption of data at rest and in transit. Regular audits and compliance checks are also part of my process.
Data Engineer Interview Questions
Q1: What is your experience with big data technologies?
I have worked with Apache Hadoop and Spark for processing large datasets. My role involved designing ETL pipelines to transform and load data into data warehouses and ensuring data quality through validation processes.
Q2: How do you handle data migration projects?
I approach data migration by first assessing the source and target systems. I then develop a migration plan, perform data mapping, and conduct a pilot migration to identify potential issues before executing the full migration.
Q3: Can you discuss your experience with SQL and NoSQL databases?
I have strong experience with SQL databases like PostgreSQL and NoSQL databases like MongoDB. I choose the appropriate database based on the requirements of the application, such as scalability, data structure, and access patterns.
Q4: How do you ensure data quality in your pipelines?
I implement validation checks at various stages of the ETL process. I also automate testing to catch discrepancies and regularly audit the data to ensure it meets quality standards.
Q5: Describe a challenging data project you worked on.
In a previous role, I worked on a project to analyze user behavior data for a retail client. The challenge was integrating data from multiple sources. I developed a robust pipeline that consolidated the data, allowing for detailed analytics while ensuring data integrity.
scylladb Interview Questions and Answers
Updated 21 Feb 2026No interview experiences shared yet.
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Common Interview Questions in scylladb
Q: A rich merchant had collected many gold coins. He did not want anybody to know about them. One day his wife asked, "How many gold coins do we have?" After pausing a moment, he replied, "Well! If I divide the coins into two unequal numbers, then 32 times the difference between the two numbers equals the difference between the squares of the two numbers."The wife looked puzzled. Can you help the merchant's wife by finding out how many gold coins they have?
Q: Suppose a newly-born pair of rabbits, one male, one female, are put in a field. Rabbits are able to mate at the age of one month so that at the end of its second month a female can produce another pair of rabbits. Suppose that our rabbits never die and that the female always produces one new pair (one male, one female) every month from the second month on.
Q: 9 cards are there. You have to arrange them in a 3*3 matrix. Cards are of 4 colors. They are red, yellow, blue and green. Conditions for arrangement: one red card must be in first row or second row. 2 green cards should be in 3rd column. Yellow cards must be in the 3 corners only. Two blue cards must be in the 2nd row. At least one green card in each row.
Q: Consider a pile of Diamonds on a table. A thief enters and steals 1/2 of the total quantity and then again 2 extra from the remaining. After some time a second thief enters and steals 1/2 of the remaining+2. Then 3rd thief enters and steals 1/2 of the remaining+2. Then 4th thief enters and steals 1/2 of the remaining+2. When the 5th one enters he finds 1 diamond on the table. Find out the total no. of diamonds originally on the table before the 1st thief entered.
Q: There are 3 clans in an island - The Arcs who never lie, the Dons who always lie and the Slons who lie alternately with the truth. Once a tourist meets 2 guides who stress that the other is a Slon. They proceed on a tour and see a sports meet. The first guide says that the prizes have been won in the order Don, Arc, Slon. The other says that, the order is Slon, Don, Arc. (the order need not be exact). To which clan did each of the guides and the players belong? ...
Q: 3 policemen and 3 thieves had to cross a river using a small boat. Only two can use the boat for a trip. All the 3 policemen and only 1 thief knew to ride the boat. If 2 thieves and 1 policeman were left behind they would kill him. But none of them escaped from the policemen. How would they be able to cross the river?
Q: 36 people {a1, a2, ..., a36} meet and shake hands in a circular fashion. In other words, there are totally 36 handshakes involving the pairs, {a1, a2}, {a2, a3}, ..., {a35, a36}, {a36, a1}. Then size of the smallest set of people such that the res...
Q: A light bulb is hanging in a room. Outside of the room there are three switches, of which only one is connected to the lamp. In the starting situation, all switches are 'off' and the bulb is not lit. If it is allowed to check in the room only once.How would you know which is the switch?
Q: There is a room with a door (closed) and three light bulbs. Outside the room there are three switches, connected to the bulbs. You may manipulate the switches as you wish, but once you open the door you can't change them. Identify each switch with its bulb.
Q: The egg vendor calls on his first customer and sells half his eggs and half an egg. To the second customer, he sells half of what he had left and half an egg and to the third customer he sells half of what he had then left and half an egg. By the way he did not break any eggs. In the end three eggs were remaining . How many total eggs he was having ?
Q: A long, long time ago, two Egyptian camel drivers were fighting for the hand of the daughter of the sheik of Abbudzjabbu. The sheik, who liked neither of these men to become the future husband of his daughter, came up with a clever plan: a race would dete
Q: A vessel is full of liquid. From the vessel, 1/3rd of the liquid evaporates on the first day. On the second day 3/4th of the remaining liquid evaporates. What fraction of the volume is present at the end of the second day
Q: There are 7 letters A,B,C,D,E,F,GAll are assigned some numbers from 1,2 to 7.B is in the middle if arranged as per the numbers.A is greater than G same as F is less than C.G comes earlier than E.Which is the fourth letter
Q: Consider a series in which 8 teams are participating. each team plays twice with all other teams. 4 of them will go to the semi final. How many matches should a team win, so that it will ensure that it will go to semi finals.?
Q: A Man is sitting in the last coach of train could not find a seat, so he starts walking to the front coach ,he walks for 5 min and reaches front coach. Not finding a seat he walks back to last coach and when he reaches there,train had completed 5 miles. what is the speed of the train ?
Q: A person meets a train at a railway station coming daily at a particular time. One day he is late by 25 minutes, and he meets the train 5 k.m. before the station. If his speed is 12 kmph, what is the speed of the train.
Q: There are some chickens in a poultry. They are fed with corn. One sack of corn will come for 9 days. The farmer decides to sell some chickens and wanted to hold 12 chicken with him. He cuts the feed by 10% and sack of corn comes for 30...
Q: Motorboat A leaves shore P as B leaves Q; they move across the lake at a constant speed. They meet first time 600 yards from P. Each returns from the opposite shore without halting, and they meet 200 yards from. How long is the lake?
Q: In a certain year, the number of girls who graduated from City High School was twice the number of boys. If 3/4 of the girls and 5/6 of the boys went to college immediately after graduation, what fraction of the graduates that year went to college immediately after graduation?
Q: There are 4 cars . They all are coming from different directions. They have to cross through one square.They all arrive at the same time. Nobody stops . still there is no clash .note : They all are driving at a speed if 100 km/hr.
