Are you preparing for a Data Engineer interview? Here are 15 real-life questions asked in interviews along with brief answers to help you revise key concepts. 🔹 Q1. Which Integration…
1. What is the difference between managed and external tables? Managed Tables: External Tables: 2. What is the use of the collect command? Out-of-Memory Exceptions: These occur when: 3. Explain…
Data Cleansing: Data cleansing is the process of identifying and correcting errors or inconsistencies in data to ensure it is accurate, complete, and ready for analysis. This can involve removing…
In the rapidly evolving world of data, mastering the key concepts of data engineering is crucial for building robust, scalable systems that empower data-driven decisions. Whether you’re a seasoned pro…
1.Find the second high salary employee from Employee table consist of EmpID, Name,Salary Columns.Select TOP 1 * from(Select TOP 2 * from Emp.EmployeeOrder by Salary desc) as AOrder by Salary…
SQL Joins combine data from multiple tables using common columns. This helps reduce data redundancy and promotes better organization. Example: Let’s say we have two tables: students and courses. The…
OLTP (Online Transaction Processing) Source:OLTP relies on real-time, transactional data from a single source. Characteristics:It manages a large number of small, individual transactions. Response Time:Response time is typically in milliseconds.…
Apurva Suke
