Checking grammar using Context-Free Grammars (CFG) and building a Parse Tree .
Memorize the "Power Hierarchy" of parsers. Knowing that CLR is the most powerful and LR(0) is the least helps you eliminate options in MCQ questions instantly.
While textbooks like "The Dragon Book" (Aho, Ullman, Sethi) are the gold standard, they can be overwhelming for GATE. For a more direct, exam-oriented approach: compiler design gate smashers
Pro Tip: Understand the relationship between these. For example, every SLR(1) grammar is also LALR(1) and CLR(1), but not vice versa. Syntax Directed Translation (SDT)
Excellent for quick conceptual clarity and shortcut tricks. While textbooks like "The Dragon Book" (Aho, Ullman,
This is where most GATE questions come from. You need to master :
Creating a platform-independent code (like 3-Address Code ). Code Optimization: Making the code faster and leaner. Sethi) are the gold standard
Ensuring the code makes "sense" (e.g., Type checking).