
Qualaroo
Survey Monkey
Typeform
Google Forms
Jotform
Qualtrics
Wufoo
Hubspot Forms
Codechef
HackerRank
AlgoExpert.io
CodeForces
LeetCode
Coderbyte
Interview Cake
Codewars
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.
Qualaroo
CodechefQualaroo is best suited for product managers, UX designers, and customer feedback teams who aim to optimize user experience and need detailed qualitative insights from users. It's ideal for businesses of all sizes but particularly beneficial for those with the budget to invest in comprehensive user feedback solutions.
Been using Qualaroo for in-page surveys, and honestly, it just works. No complicated setup, no guessworkโjust pop in a survey, get feedback, and move on. The fact that we can control how much we spend based on responses is a big win. Reports are clean and donโt make us dig through piles of data. Plus, it fits right into our workflow.
Apart from the survey-building, I have been using Qualaroo because it offers tons of different channels to deploy your surveys, and you can collect feedback from your users no matter where they are. There are also plenty of integration options to make the most out of the survey data.
We wanted to collect feedback from the leaving customers, so we used surveys and triggers to show our pop-up as the visitors were about to leave the website. Through the branching logic, we were able to redirect some of the visitors to the right pages and stop them from leaving. The tool was handy, and I would recommend it.
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
Survey Monkey - Create and publish online surveys in minutes, and view results graphically and in real time. SurveyMonkey provides free online questionnaire and survey software.
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Typeform - Create beautiful, next-generation online forms with Typeform, the form & survey builder that makes asking questions easy & human on any device. Try it FREE!
AlgoExpert.io - A better way to prep for tech interviews
Google Forms - Simple web forms from Google.
CodeForces - Programming competitions and contests, programming community.