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Database Systems MCQs – Practice Test 10 (Chapter 18)

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Query Processing MCQ – Practice Test 10 PDF Download

MCQ 46: An A1-search algorithm is applicable to any file, despite of the file's ordering or:

  1. Nature of selection operation
  2. Availability of indices
  3. Availability of access paths
  4. Both A and B

MCQ 47: The A2 search algorithm does an:

  1. Equality comparison
  2. Inequality comparison
  3. No comparison
  4. Nonkey comparison

MCQ 48: File scans are algorithms for:

  1. Searching
  2. Locating
  3. Retrieving
  4. Indexing

MCQ 49: The term that takes a query-evaluation plan, executes the plan, and returns the answers to the query, is called:

  1. Query-execution engine
  2. Query-plan engine
  3. Execution engine
  4. Query-evaluation engine

MCQ 50: The cost of evaluation of query can be measured in terms of different resources, disk accesses and:

  1. CPU time
  2. Distributed or parallel database system
  3. Cost of communication
  4. All of the above

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