Regular Expression to DFA (Direct Method) | Compiler Design | Unit 01 | Hindi

Published: 19 February 2026
on channel: Kalrav
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43

Regular Expression to DFA Conversion using Direct Method explained for B.Tech students preparing for Compiler Design and Theory of Computation exams.

📚 Notes: https://drive.google.com/drive/folder...

📺 Full Playlist:
   • Compiler Design Playlist | B.Tech  

This video explains how to convert a Regular Expression (RE) directly to DFA using syntax tree, followpos, and direct method with step-by-step explanation.

This video is useful for last minute revision before end semester exams.

📌 Topics Covered:
• RE to DFA conversion (Direct Method)
• Syntax tree construction
• Firstpos, Lastpos, Followpos
• DFA construction from regular expression

🎯 This video is helpful for:
• B.Tech CSE students
• Compiler Design & TOC preparation
• Last-minute revision before exams
• Students preparing for exams and viva

🔍 Keywords:
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⏱️ Chapters:
00:00 Introduction
00:32 Nullable, Firstpos & Lastpos Table
05:49 Step 1: Building the Syntax Tree
08:42 Step 2: Computing Firstpos, Lastpos & Nullable
13:53 Step 3: Finding Followpos
16:43 Step 4: Constructing the DFA


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