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Scribd hosts several highly-rated PDFs for Natraj Sir’s material. Note that these may require a free account or an upload to download: Advanced & Core Java Collection : A 484-page document titled Advanced Java Notes by Nataraz Sir often contains foundational core concepts as well. Servlet & JSP Notes : Specific notes for web development, including Servlets by Natraj Sir Spring Framework : For those moving beyond core concepts, his Spring Complete Notes are widely used. Key Topics Covered in Natraj Sir's Java Notes core java notes by natraj sir pdf free
They include frequently asked interview questions and real-world coding scenarios. Many websites claiming to offer free PDFs are
| Interface | Classes | |-----------|----------------------------------| | List | ArrayList, LinkedList | | Set | HashSet, TreeSet | | Map | HashMap, TreeMap | Servlet & JSP Notes : Specific notes for