Data Engineering Analyst
Data Engineering Analyst Interview Questions and Answers for Freshers
You have been given an integer array/list (ARR) of size N. You have to return an array/list PRODUCT such that PRODUCT[i] is equal to the product of all the elements of ARR except ARR...read more
You are given an array/list ARR consisting of N integers. Your task is to find the maximum possible sum of a non-empty subarray(contagious) of this array.
Note: An array C is a subarray of a...read more
Mcqs related to OS , round robin , compiler , scheduling etc.
Mcqs related to Networking.
Coding mcqs
Q4. Window analytical functions, difference and how to use them
Window analytical functions are used to perform calculations across a set of table rows related to the current row.
Window functions operate on a set of rows related to the current row
They allow calculations to be performed across a group of rows
Common window functions include ROW_NUMBER(), RANK(), DENSE_RANK(), and NTILE()
They are used with the OVER() clause in SQL queries
Q5. SQL query to find nth highest salary
Use SQL query with ORDER BY and LIMIT to find nth highest salary.
Use ORDER BY clause to sort salaries in descending order
Use LIMIT to specify the nth highest salary
Example: SELECT salary FROM employees ORDER BY salary DESC LIMIT n-1, 1
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