Data Structure Crossword Puzzle

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Across
  1. 2. One type of linked list
  2. 3. a basic unit of a data structure in linked list or tree
  3. 4. hierarchical structure in which elements are arranged in multiple levels
  4. 6. a matrix containing more no of zeroes
  5. 7. LIFO data structure
  6. 8. non-linear data structure consisting of nodes and edges
  7. 9. one type of tree traversal
Down
  1. 1. FIFO data structure
  2. 2. is the total number of children of that node.
  3. 5. way of organizing data in a computer