Data Structure Uses

Question 1

Array

Answer 1

• Use when you need constant-time random access to elements.
  
  • Suitable for situations where the size of the data is fixed or known in advance.

Question 2

ArrayList

Answer 2

• Similar to an array, but provides dynamic resizing.
  
  • Use when you need a resizable array with constant-time random access.

Question 3

LinkedList

Answer 3

• Use when you frequently insert or delete elements from the middle of the list.
  
  • Good for situations where sequential access is more common than random access.

Question 4

Stack

Answer 4

• Use when you need Last In, First Out (LIFO) access pattern.
  
  • Useful for managing function calls, undo/redo functionality, and parsing expressions.

Question 5

Queue

Answer 5

• Use when you need First In, First Out (FIFO) access pattern.
  
  • Suitable for tasks like managing tasks in a printer queue, breadth-first search, etc.

Question 6

Binary Trees

Answer 6

• Use for hierarchical data representation.
  
  • Suitable for scenarios where you need efficient searching, insertion, and deletion operations.

Question 7

HashSet

Answer 7

• Use when you need constant-time average complexity for basic operations (add, remove, contains).
  
  • Good for scenarios where you want to check for the presence of an element without duplicates.

Question 8

Heap

Answer 8

• Use when you need quick access to the maximum or minimum element.
  
  • Often used in priority queue implementations, where the highest (or lowest) priority element needs to be retrieved quickly.