SKEELZY LAB / COURSE PREVIEW V1

Java DSA
Interview Foundations

Choose a pattern. Explain why it works. Then write the Java.

For developers who already know basic Java. Three samples · about 95 minutes · local Java practice.

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Assessment mode: open-book knowledge checks and manual self-review. Java runs on your computer. There is no automated Java grading or instructor review queue here.

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From a contract to a pattern

Start with a scan and a loop invariant. Add memory when distant repeats matter. Then use sorted order to eliminate candidates with two pointers.

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