Codechef
HackerRank
AlgoExpert.io
CodeForces
LeetCode
Coderbyte
Interview Cake
Codewars
InterviewWatch
HireVue
CodeChef is a not-for-profit educational initiative started by Directi more than a decade ago. We started with a dream of seeing an Indian team winning a gold medal at the ACM ICPC World Finals. In its quest for the same, CodeChef has built a self-driven community of the world's best programmers. Today more than 1.3 million competitive programmers from 180+ countries learn from CodeChef. CodeChef has been hosting monthly programming contests regularly for 10 years now. Its platform has assessed 92 million+ code submissions to date, and over 30000 organizations are being impacted by CodeCheffers worldwide. It also organizes SnackDown - one of the world's largest global programming competition whose last edition drew participation from 140+ countries. Since 2017, CodeChef has started providing India's only industry-ready certification in Data Structures and Algorithms, and 1800+ programmers have been certified under the same.
InterviewWatch is a consent-first integrity platform for live remote interviews. A lightweight application monitors machine-level signals to identify potential AI assistance, desktop and web AI tools, hidden cheat overlays, remote-control software, suspicious typing patterns, virtual devices, and unusual display or clipboard activity. It never records the candidate's screen, audio, or video and does not capture typed or clipboard content. Signals appear in a real-time recruiter dashboard and are converted into an explainable integrity score and tamper-evident report for human review, helping employers verify that candidates are genuine and completing interviews independently without invasive surveillance.
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InterviewWatch's answer:
InterviewWatch's answer:
InterviewWatch is a privacy-first interview integrity platform that verifies remote interviews using machine-level signals instead of recording audio or video, tracking eye movements, or analyzing candidate behavior with machine learning. It provides objective, tamper-evident evidence of interview integrity while respecting candidate privacy, helping hiring teams make more confident hiring decisions.
InterviewWatch's answer:
Unlike traditional interview monitoring/proctoring tools, InterviewWatch does not record audio or video, use eye-tracking, gaze detection, or machine learning to analyze candidate behavior. Instead, it relies on objective machine-level integrity signals to identify risks, providing privacy-friendly, evidence-backed verification with minimal impact on the interview experience.
InterviewWatch's answer:
InterviewWatch is built for companies that conduct remote hiring, including talent acquisition teams, recruiters, hiring managers, staffing firms, and enterprises that want to verify interview integrity and reduce hiring fraud during remote interviews.
InterviewWatch's answer:
InterviewWatch was born from my experience serving on interview panels. Over time, I interviewed many candidates whose interview performance didn't match their actual understanding. Some struggled to explain the code they had just written or reason through their own solutions. As AI became capable of solving interview problems in real time, it became even harder to know whether an interview reflected a candidate's true abilities. I built InterviewWatch to help companies restore trust in remote hiring through objective, privacy-first interview integrity verification based on machine-level signal, not audio recording, video recording, or behavioral analysis.
InterviewWatch's answer:
We are pre revenue
Based on our record, Codechef seems to be more popular. It has been mentiond 7 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Have you heard of codeforces.com, atcoder.jp, codechef.com, etc? Source: over 2 years ago
Leetcode is good to learn basic algorithms because problem statements are usually straightforward. Competitive programming has much wider range of problems. Most popular sites for cp are codeforces.com , atcoder.jp, codechef.com . Source: over 2 years ago
Learn Java with hands-on experience. I personally used codingbat.com a lot, but I've heard good things about codechef.com, which appears to even have a competitive option. Source: over 3 years ago
For practicing algorithms, use any of the freely available websites like https://hackerrank.com https://codechef.com https://projecteuler.net A structured set of practice problems are available at https://www.interviewbit.com/courses/programming/ Avoid https://geeksforgeeks.org because it has a ton of material but very poor quality control. Source: about 4 years ago
These all have sample problems to solve Hackerrank.com edabit.com codewars.com codechef.com and there are tons more. Best of luck to you. I am at about the same level myself. I really like these sites. Source: over 4 years ago
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
HireVue - Video interviews, recruiting tools, assessments & coaching all in one platform. Let HireVue transform the way you discover, hire and develop talent with Video Intelligence.
AlgoExpert.io - A better way to prep for tech interviews
CodeForces - Programming competitions and contests, programming community.
LeetCode - Practice and level up your development skills and prepare for technical interviews.
Coderbyte - Coderbyte is a place built for anyone to practice and perfect their programming skills.