Hash Search Algorithm
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Questions and Answers

Which operation is used to add an element to a hash table?

  • Updating
  • Searching
  • Deleting
  • Insertion (correct)

    • What is the purpose of the search operation in a hash table?

  • To look-up values (correct)
  • To calculate the hash value
  • To delete elements
  • To store values

    • How does the hash function resolve collisions in a hash table?

  • By deleting the conflicting element
  • By assigning a new index number (correct)
  • By storing the value in a separate table
  • By rehashing the key

    • What does the delete operation do in a hash table?

    <p>Removes a value</p> Signup and view all the answers

    In the given Python example, what is the value of the hash key for 3?

    <p>3</p> Signup and view all the answers

    What is the purpose of the hash_key function in the Python example?

    <p>To calculate the index number</p> Signup and view all the answers

    What is the value of the hash key for 9 in the given Python example?

    <p>3</p> Signup and view all the answers

    What is the purpose of the m parameter in the hash_key function?

    <p>To resolve collisions</p> Signup and view all the answers

    Which data structure is commonly used to store and access data easily and efficiently?

    <p>Array</p> Signup and view all the answers

    What is the time complexity for searching in an Array data structure?

    <p>O(log n)</p> Signup and view all the answers

    Why was there a need for a new data structure even though Array was already available?

    <p>To improve efficiency</p> Signup and view all the answers

    What is the purpose of a hash function in hashing?

    <p>To determine the index of an element in a hash table</p> Signup and view all the answers

    What is a collision in hashing?

    <p>When a key maps to an already occupied location</p> Signup and view all the answers

    What is one advantage of hashing in data structures?

    <p>Fast data retrieval with constant-time complexity</p> Signup and view all the answers

    What does a hash table do in hashing?

    <p>Maps keys to values using a hash function</p> Signup and view all the answers

    What is the time complexity for searching in a hash table?

    <p>O(1)</p> Signup and view all the answers

    What is one application of hashing?

    <p>Secure data storage</p> Signup and view all the answers

    Which data structure is an example of a hash table?

    <p>Dictionary</p> Signup and view all the answers

    What is the time complexity of hash tables in the best-case scenario?

    <p>O(1)</p> Signup and view all the answers

    What happens when two values generate the same hash key in a hash table?

    <p>The values are combined into one location</p> Signup and view all the answers

    What is the disadvantage of using hash tables?

    <p>Performance decreases with many collisions</p> Signup and view all the answers

    What is the process of generating a fixed-size output from an input of variable size using mathematical formulas called?

    <p>Hashing</p> Signup and view all the answers

    What is the average time complexity of hash tables?

    <p>O(1)</p> Signup and view all the answers

    What is the purpose of chaining in hash tables?

    <p>To combine values that generate the same hash key</p> Signup and view all the answers

    What is the advantage of using hash tables?

    <p>High performance for data lookup, insertion, and deletion</p> Signup and view all the answers

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