Java Persistance API are the specifications on relational data interaction. Hibernate ORMiBatis ORM

Spring Boot REST API Workflow Request is received by DispatcherServlet, which is responsible for processing any incoming URI requests & mapping them to their corresponding handlers in the form of controller methods After the  controller method has been executed, the resource is then processed as a response which can either be JSON or XML 2 […]

What is auto wiring? How does it work? Stereotype annotation in Spring Boot. Difference between Uri & URL? What is ResponsEntitiy? How to handle exceptions in spring boot? How to handle validations in spring boot. @ComponentScan in spring boot Explain in brief what @SpringBootApplicationDoes Spring boot architecture Explain Application context? Explain Dispatcher Servlet? What does […]

Problem Name Score Accuracy Difficulty Company arrays Cumulative Sum3067%easy Positive Cumulative Sum3057%easy Identical Twins3075%easy Even Number of Digits3036%easy Implement Insertion Sort3078%easy Merge Two Sorted Arrays3058%easy+2 Merge Sorted Subarrays3055%easy Implement Merge Sort3067%easy+4 Implement Quicksort3061%easy+9 Square sorted array3077%easy Max Consecutive Ones3072%easy Arithmetic Sequence3073%easy Largest Contiguous Sum3037%easy+11 Pascal’s Triangle3061%easy Row Column Zero5060%medium Matrix Rotation5059%medium+2 Primes upto N5058%medium Merge […]

First conceived by Netflix, chaos testing is part of the practice of intentionally trying to harm an application in production.. https://netflixtechblog.com/the-netflix-simian-army-16e57fbab116 What is Chaos Testing Engineering? Chaos testing, or chaos engineering, is the highly disciplined approach to testing a system’s integrity by proactively simulating and identifying failures in a given environment before they lead to unplanned […]

Show topics Week 1 2 / 58 1 Two Sum Easy·15 mins 2 Valid Parentheses Easy·20 mins 3 Merge Two Sorted Lists Easy·20 mins 4 Best Time to Buy and Sell Stock Easy·20 mins 5 Valid Palindrome Easy·15 mins 6 Invert Binary Tree Easy·15 mins 7 Valid Anagram Easy·15 mins 8 Binary Search Easy·15 mins 9 Flood Fill Easy·20 mins 10 Lowest Common Ancestor of a […]

1 Two Sum Easy·15 mins 2 Valid Parentheses Easy·20 mins 3 Merge Two Sorted Lists Easy·20 mins 4 Best Time to Buy and Sell Stock Easy·20 mins 5 Valid Palindrome Easy·15 mins 6 Invert Binary Tree Easy·15 mins 7 Valid Anagram Easy·15 mins 8 Binary Search Easy·15 mins 9 Flood Fill Easy·20 mins 10 Lowest Common Ancestor of a Binary Search Tree Easy·20 mins 11 […]