In which scenario would you prefer a hash table over a binary search tree?

Practice Questions

Q1
In which scenario would you prefer a hash table over a binary search tree?
  1. When you need to maintain sorted order
  2. When you require frequent insertions and deletions
  3. When you need to perform range queries
  4. When you need constant time complexity for lookups

Questions & Step-by-Step Solutions

In which scenario would you prefer a hash table over a binary search tree?
  • Step 1: Understand what a hash table is. A hash table is a data structure that stores data in key-value pairs and allows for fast access to values using keys.
  • Step 2: Understand what a binary search tree (BST) is. A BST is a data structure that organizes data in a tree format, where each node has at most two children, and the left child is less than the parent, while the right child is greater.
  • Step 3: Compare the time complexity of both structures. Hash tables have an average-case time complexity of O(1) for lookups, meaning you can find data very quickly.
  • Step 4: Consider the scenario where you need fast access to data. If you need to retrieve data quickly and frequently, a hash table is better because it allows for almost instant lookups.
  • Step 5: Think about the use case. If you are working with a large dataset and need to perform many lookups, a hash table is preferable over a binary search tree.
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