message: Removed duplicates.
diff: [CareerCup](https://www.careercup.com/) - Good source for software engineering interview preparation.
  -[LeetCode](https://leetcode.com/) - A great platform to practice questions, mock interviews for interviews from product based companies.
  -
  -[Spoj](https://www.spoj.com/problems/classical/) - Good source for practicing quality problems for competitive programming cum algorithms.
  ### Tutorials to improve Competitive Programming:
  * [TopCoder Competitive Programming Tutorials](https://www.topcoder.com/community/competitive-programming/tutorials/) - A list of best tutorials written by respected Topcoder members.
  