Question: Looking for a platform that offers coding challenges with customizable difficulty levels and real-time feedback.

If you're looking for a site that offers coding challenges with adjustable difficulty levels and immediate feedback, Pgrammer is a good option. It offers personalized learning experiences through adaptive coding challenges, real-time hints and solution analysis. The site supports more than 20 programming languages and offers features like AI-assessed difficulty levels based on your job title to make challenges more realistic. With a free starter tier and a more detailed $12/month premium tier, Pgrammer is good for both candidates and interviewers.

Another option is CodingDrills. The site offers more than 100 problems updated each week, covering a range of subjects from easy to hard. It offers interactive feedback from an AI tutor named Ada so you can practice and improve your coding skills. The exercises are tagged by difficulty and subject so you can get a well-rounded education that's tailored to your needs. Whether you're a novice or a master programmer, CodingDrills offers a structured way to practice and improve.

If you want a site that's designed to be an all-purpose technical skills assessment and development tool, check out CodeSignal. It offers AI-powered learning tools and skills assessments for individuals and teams. With features like personalized learning paths, realistic coding assessments and team performance improvements, CodeSignal has a broad range of uses. The site offers several pricing tiers, so it's good for light or heavy use and for those who want to pay by the month or the year.

Last, Educative offers interactive AI-infused courses to help you learn new skills and prepare for tech interviews. The site offers hands-on training courses, cloud-based practice labs and guided skill paths. With more than 700 hands-on courses, Educative is a flexible and accessible way for developers to learn about new technologies and best practices in coding.