Data structure

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Across
  1. 2. element inserted first will also be removed first
  2. 6. removal of an element from queue
  3. 8. group of data elements grouped together under one name
  4. 10. also known as Reverse Polish Notation
  5. 11. datastructures that can store an indefinite amount of item
  6. 12. removes an item from the stack
  7. 15. process of calling a function by itself
  8. 16. used to store keys or value pairs
Down
  1. 1. returns top element of stack
  2. 3. add an element into queue
  3. 4. collection of nodes
  4. 5. described as "array of arrays"
  5. 7. is a linear data structure
  6. 9. node at the top of tree
  7. 13. adds an item in the stack
  8. 14. non-linear data structures consisting nodes and edges