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Snowflake Interview Questions for Experienced

January 23, 2024

To kickstart your Snowflake journey, explore these comprehensive set of interview questions. Tailored for your preparation, these questions ensure readiness for Snowflake interviews. Explore the top-rated Snowflake course brought to you by Aimore Technologies, the premier software training institute in Chennai.

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  1. What is the difference between an SQL Query and a procedure?
  2. What is the syntax for a procedure in SQL?
  3. Why is Snowflake used in data warehousing?
  4. Can you explain the architecture of Snowflake?
  5. Which ETL tools support Snowflake?
  6. Is Snowflake considered as ETL or ELT?
  7. What are the cache types in Snowflake?
  8. What is Data Cleansing?
  9. Star and snowflake schema what would you prefer to consider yourself as an architect
  10. What is normalization and denormalisation?
  11. Differences between Fail-safe and time travel
  12. Differences between Primary index & primary key
  13. Challenges you faced in data migration
  14. What is snow pipe, What Advantages of snow pipe
  1. What distinguishes Snowpipe from a stream in Snowflake?
  2. How can you schedule a task in a database management system?
  3. Explain the concept of the Data Vault model in database design.
  4. What are some common data modeling techniques used in database design?
  5. Which is preferable for data storage in Snowflake - the internal stage or the external stage?
  6. Provide a step-by-step process for transferring data from AWS S3 to a table in Snowflake, with a focus on authentication from Salesforce.
  7. Do you utilize any connectors, such as Kafka or SoapUI, in your data integration processes?
  1. Outline the steps involved in migrating data from a Relational Database Management System (RDMS) to Snowflake.
  2. Clarify the distinctions between an SNS topic and an SQS queue in AWS.
  3. Define the term "stream" in the context of data processing.
  4. Elaborate on the properties associated with stream tables.
  5. Describe how query execution takes place in a database architecture.
  6. Explain the role and functions of the query process layer in a database system.
  7. What are constraints in a database, and how do they ensure data integrity?
  8. Provide a method to delete duplicate records from a table in a relational database.
  9. How would you retrieve the third maximum salary in each department from a database table?
  10. Discuss the limitations of using joins in materialized views.
  11. Name some additional services available in Amazon Web Services (AWS) beyond basic storage and compute.
  12. Can you share insights into how data modelling is implemented in your current project?
  13. List some essential Git commands used in version control and collaborative software development.
  1. What is the data flow, and how many layers are in our projects?
  2. How do you convert JSON to the Snowflake VARIANT data type?
  3. What are alternative methods for loading data into Snowflake without using JSON functions?
  4. Can you explain the concept of a warehouse in Snowflake?
  5. What is the architecture of Snowflake?
  6. What is a stream in Snowflake, and what are the columns present in a stream?
  7. How are task dependencies managed in Snowflake?
  8. What is a Snowpipe in the context of Snowflake?
  9. How can you set up error notifications in Snowflake?
  10. Is there a specific table for maintaining notification history in Snowflake?
  11. What is the purpose of the pattern function in Snowflake?
  12. Could you explain the process of data sharing in Snowflake?
  1. What are the types of Slowly Changing Dimensions (SCD)?
  2. How do you move 100 GB of data using Oracle Transparent Application Failover (TAF)? Describe the steps you would follow.
  3. What is the maximum size of a file that can be loaded into an S3 bucket?
  4. Explain the relationship between AWS and SF (Salesforce).
  5. How can you create a table in Oracle with a time/travel retention period to go back before 12 days?
  6. Differentiate between a View and a Materialized View (MView).
  7. Have you worked with Snowpipe? If so, describe your experience in creating and using Snowpipe.
  8. Explain the concept of a Merge statement in the context of a relational database.
  1. What ETL (Extract, Transform, Load) tool would you recommend for data integration tasks, and what are the key features that make it suitable?
  2. Can you explain the key features and advantages of using Snowflake as a cloud data warehouse platform?
  3. What are the key components and architectural considerations when designing a data solution using Snowflake as the underlying data warehouse?
  4. How does Snowflake handle caching, and what role does it play in optimizing query performance?
  5. What strategies or best practices can be employed to enhance the performance of a Snowflake data warehouse?
  6. What mechanisms does Snowflake provide for ensuring fail-safe operations, especially in the context of data processing and storage?
  7. What steps should be followed when extracting data from Snowflake as a source for a data integration or ETL process?
  8. Can you elaborate on the internal storage architecture of Snowflake and how data is organized within the platform?
  9. What methods or tools can be used to schedule and automate tasks or jobs within Snowflake?
  10. What is normalization in the context of database design, and why is it important?
  11. Explain the concept of third normalization in database design and its significance.
  12. Query to find the second date from the given dates (2020-01-23, 2020-02-21):
  13. Provide a SQL query to find the second date from a set of given dates, considering a specific condition.
  14. How can you extract the fourth character from each value in a specific column (col_a) containing city names like Chennai, AP, and Mumbai?
  15. What steps are involved in creating a table in Snowflake, and how can you insert data from a file into that table?
  16. What are the advantages and use cases for Snow SQL, Snowflake's SQL-based query language?
  17. Explain the methods or procedures to recover or retrieve records that have been accidentally deleted from a Snowflake table.
  1. Advantages of Snowflake when compared to SQL Server database?
  2. Is there any size limit for file loading in Snowpipe?
  3. How to handle double quotes in the file format of Snowflake?
  4. Can we perform any DML in the clone table, and what happens to storage in Snowflake?
  5. How to perform database cloning in Snowflake?
  6. Does database cloning in Snowflake include a stage as well?
  7. What is the datatype to handle JSON and XML in the stage layer of Snowflake?
  8. What is the max size of the VARIANT data type in Snowflake?
  9. Scenario to change the warehouse from small to medium in Snowflake?
  10. How to select duplicates in Snowflake tables?
  11. How will you optimize a query even when it has a cluster key, and the query is still taking time with a large volume of data in Snowflake?
  12. If a file with the same filename gets loaded into S3 in Snowflake, what will happen?
  13. If a file with the same filename gets loaded into S3 after deleting the old one, will the duplicate data get loaded, and how will it load?
  14. How to exclude double quotes in the file format of Snowflake?
  15. What happens to compute in Snowflake?
  16. What is the cost computation for cloning in Snowflake?
  17. Limitations in a Reader account in Snowflake?
  18. How to change the sequence number in Snowflake?
  19. How to alter the auto concrete in Snowflake?
  20. Syntax to change the datatype in Snowflake?
  21. What are the credits for each warehouse in Snowflake?
  22. What are credits in Datawarehouse?
  23. Different types of credits in Snowflake?
  24. Errors we get when loading files to Snowflake tables?
  25. How to eliminate the entire row duplicate in the flat file of Snowflake?
  26. How to retain one unique record and delete duplicates in Snowflake tables?
  27. How to check the long-running step in SQL at Snowflake?
  28. What are the limitations we have in using SQL language in Snowflake Java scripts?
  29. Use of cursor in PLSQL?
  30. How to integrate and share data between Unix and Snowflake using SnowSQL on Unix?
  31. How to load a large volume of data from on-premise to Snowflake?
  32. How do you load data into an external stage in S3 in Snowflake?
  33. Python in Snowflake?
  34. Does lambda function in Snowflake?
  35. Use of any ETL tool in Snowflake?
  36. The volume of data handled in Snowflake?
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Manoj Kumar A

Manoj Kumar A

A. Manoj Kumar graduated from Sri Muthukumaran Institute of Technology and is a proficient Snowflake trainer. Despite earning a Bachelor's degree in Mechanical Engineering, Manoj has carved out a niche for himself in the field of Snowflake, showcasing his adaptability and passion for technology.

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