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These notes take you from zero to full marks in GATE Compiler Design. Read the lessons in order: each lesson only uses ideas taught before it.

Every lesson follows the same 14 sections. Questions always come before answers. The answers sit in a closed Answer Vault toggle at the end of each lesson, so try first and open later.

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Spaced recall. Each lesson opens with 3 warm-up questions from the previous lesson, about 3 lessons back, and 7 or more lessons back.

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Verified numbers. Every table, set, trace, block count and program output was computed by code and checked before it went into these notes.

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Track progress in the Notion database Compiler Design Tracker: one row per lesson, lock-in, checkpoint and the final test.

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Finish line. Phase 7 has the Master Rule Sheet, one program traced through every phase, mixed practice and a 90-minute final test. Its answer key is the last section.

Translation House, the world of every story in these notes. A Gujarati speech enters at the ground floor and leaves the top floor as polished English, the way a source program leaves a compiler as optimized code.

Build progress

Phases

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Phase 0 · Foundations

7 lessons · 2 lock-ins · checkpoint

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Phase 1 · Lexical Analysis

5 lessons · 3 lock-ins · checkpoint

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Phase 2 · Syntax Analysis (Parsing)

13 lessons · 4 lock-ins · checkpoint

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Phase 3 · Syntax-Directed Translation

4 lessons · 4 lock-ins · checkpoint

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Phase 4 · Intermediate Code Generation

6 lessons · 4 lock-ins · checkpoint

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Phase 5 · Runtime Environments

5 lessons · 5 lock-ins · checkpoint

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Phase 6 · Optimization

6 lessons · 6 lock-ins · checkpoint

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Phase 7 · Integration & Final Test

7 lessons · 0 lock-ins

Roadmap · every item in order

🧭Phase 0 — Foundations