Brain Riddle Set 1

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Across
  1. 2. Language for iOS and macOS development
  2. 3. COLLECTION A memory management technique
  3. 6. Microsoft's object-oriented language
  4. 9. Web page language
  5. 11. A technique for code optimization
  6. 14. Common file extension for images
Down
  1. 1. A type of function in functional programming
  2. 4. A feature of JavaScript for asynchronous programming
  3. 5. A very old language
  4. 7. A way to create concurrent programs
  5. 8. Data storage unit
  6. 10. Looping command
  7. 12. Object-oriented programming
  8. 13. Google's language