Interview Questions

Write a Python function to check if a string is a palindrome.

Write a Python function to check if a string is a palindrome.

Create a Python program to demonstrate the use of set operations (union, intersection).

Describe Spark's memory management model. How do you handle heap memory overhead issues?

Differentiate SORT BY, ORDER BY, DISTRIBUTE BY, and CLUSTER BY

Extended the solution to determine the nth largest element in an array.

GeoPandas - definition and features

Grouping and aggregation functions?

How many cities does each department operate in? List the top 3 departments in terms of the most number of cities. In case of a tie, order by dept_id.

How would you decide between using DISTKEY and SORTKEY?

Implement an algorithm to find the longest common prefix among an array of strings.

List customers with more than 5 orders.

List every combination of dept_name, employee_name, and city such that the employee belongs to the department and the same city in which the department is located.

Multithreading and Synchronization in Java - write code to manage synchronized threads

Replace words and perform string operations in Python (replace, vowel removal, word count, pattern check).

Reverse a string with special characters preserved.

Sort and merge arrays

Spark Coding: Using explode() Function to flatten nested arrays

Stuff Function for XML Usages

What role does the executor heap size play in preventing OOM errors?