Indexing Mechanisms Quiz
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Questions and Answers

What is the basic difference between ordered indices and hash indices?

  • Ordered indices store search keys in sorted order, while hash indices use a hash function to distribute search keys across buckets (correct)
  • Ordered indices support efficient insertion time, while hash indices support efficient deletion time
  • Ordered indices have higher space overhead compared to hash indices, while hash indices have lower access time
  • Ordered indices use a hash function to distribute search keys across buckets, while hash indices store search keys in sorted order

    • What is a clustering index in the context of ordered indices?

  • A clustering index specifies the sequential order of the file and is also called a primary index (correct)
  • A clustering index has lower space overhead compared to other types of indices
  • A clustering index is used to distribute search keys across buckets using a hash function
  • A clustering index is used to efficiently access records with a specified value in the attribute

    • What is the purpose of an index file in the context of database management?

  • To ensure data integrity and consistency in the database
  • To facilitate concurrent access to the database by multiple users
  • To speed up access to desired data by providing a lookup structure based on search keys (correct)
  • To store the original data in a more compact and efficient manner

    • What is the key feature of hash indices in distributing search keys across buckets?

    <p>Uniform distribution of search keys using a hash function</p> Signup and view all the answers

    What access type is efficiently supported by ordered indices?

    <p>Records with an attribute value falling in a specified range of values</p> Signup and view all the answers

    What is the key difference between ordered indices and hash indices?

    <p>Ordered indices store search keys in sorted order, while hash indices use a hash function to distribute search keys across buckets.</p> Signup and view all the answers

    What is the purpose of an index file in the context of database management?

    <p>To speed up access to desired data by providing a structure for efficient lookup of records based on search keys.</p> Signup and view all the answers

    What is a clustering index in the context of ordered indices?

    <p>An index whose search key specifies the sequential order of the file, also known as a primary index.</p> Signup and view all the answers

    What access type is efficiently supported by ordered indices?

    <p>Access to records with a specified value in the attribute.</p> Signup and view all the answers

    What is the key feature of hash indices in distributing search keys across buckets?

    <p>Using a hash function to uniformly distribute search keys across buckets.</p> Signup and view all the answers

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