Real questions from top companies
Write a Singleton class implementation
Write a decorator function to log the execution time of a function.
Write a function that replaces all characters in a list except for a given character
Write a function to detect anomalies in streaming data using a sliding window.
Write a function to find the longest palindromic substring in a given string.
Write a function to remove invalid parentheses from a string.
Write a higher-order function to filter values greater than a threshold in a list.
Write a script to automate daily ingestion of data from an API into a data lake.
Write a simple service and controller class in Spring Boot for REST API
Write a solution to efficiently search a rotated sorted array.
Write a swap function without if-else.
Write code for character frequency in a text file.
Write code for palindrome generation.
Write code to calculate the power of a given number in minimum time complexity.
Write code to manually invoke garbage collection in Java
Write code to merge two sorted arrays without using extra space.
Write code using Java's concurrent API (forEach, forEachEntry, forEachKey)
Write pseudo code for an ETL pipeline using Python and Pandas
Zigzag Order Traversal of a Binary Tree
Add Row Numbers using window function in PySpark
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