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OWASP Top 10 vulnerabilities: 1. **SQL Injection** - Use parameterized queries 2. **XSS (Cross-Site Scripting)** - Sanitize user input 3. **CSRF** - Use CSRF tokens 4. **Broken Authentication** - Implement proper session management 5. **Sensitive Da...
Focus on these areas: 1. **Data Structures**: Arrays, Linked Lists, Trees, Hash Tables 2. **Algorithms**: Sorting, Searching, Recursion 3. **Problem Solving**: Practice on LeetCode/HackerRank 4. **System Design**: For senior roles 5. **Behavioral Qu...