Cross word MCA round 2

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Across
  1. 4. Function calling itself
  2. 5. Language used to manage databases
  3. 9. Special method used to initialize objects
  4. 10. Base-16 number system used in computing
Down
  1. 1. OOP feature to derive a class from another
  2. 2. Security system that monitors network traffic
  3. 3. Translates domain names to IP addresses
  4. 6. Unit of data sent over a network
  5. 7. Core part of an operating system
  6. 8. Element in a data structure like a tree or graph