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Stdin/stdout judging, animated company sheets, curated DSA 150, and a categorized developer tools hub.

DSA Interview 150

150 classic interview problems with C# stdin/stdout auto-judge — the full curated sheet.

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Earn verifiable certificates with unique IDs. Share directly on LinkedIn to showcase your expertise.

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DSA Interview 150, company-wise DSA, auto-judge, and daily learning streaks across the site.

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Featured Ebooks

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Advanced dotnet developers prepare basic interview

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Choose Your Path

Browse our curated library of advanced ebooks and select topics that match your career goals.

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Toolliyo Academy

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67+ categorized tools — JSON, fake data, PDF, HTML/CSS, security encoding, and SEO. All free in your browser.

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Merge PDFs and convert images to PDF — processed locally.
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