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There are 10 piles of candies, 9 piles weigh 1g each, and one pile weighs 2g. How can you use a scale to determine which weighs 2g? There are 3 versions of this question: with x piles weighing 1g, y piles weighing 2g, x + y = 10, how can you find how many 1g piles there are?
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Intermediate Full Stack Software Engineer

Interviewed at D3 Security Management Systems

3.3★
Nov 12, 2024

There are 10 piles of candies, 9 piles weigh 1g each, and one pile weighs 2g. How can you use a scale to determine which weighs 2g? There are 3 versions of this question: with x piles weighing 1g, y piles weighing 2g, x + y = 10, how can you find how many 1g piles there are?

The written test was divided into four sections, mostly multiple-choice (single and multiple select): a 90-minute logical reasoning section with pattern/algorithm-style questions (no coding), a 30-minute frontend section focused on class-style React/JS fundamentals, a 30-minute backend section where you analyze screenshots of code and fill in missing lines based on expected output, and a database section that tested MongoDB concepts and query optimization.
avatar

Intermediate Full Stack Software Engineer

Interviewed at D3 Security Management Systems

3.3★
Nov 21, 2025

The written test was divided into four sections, mostly multiple-choice (single and multiple select): a 90-minute logical reasoning section with pattern/algorithm-style questions (no coding), a 30-minute frontend section focused on class-style React/JS fundamentals, a 30-minute backend section where you analyze screenshots of code and fill in missing lines based on expected output, and a database section that tested MongoDB concepts and query optimization.

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