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DBMS MCQs - Indexes - DBMS
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  1. What is the purpose of index in sql server
    2. A.
    To enhance the query performance
    B.
    To provide an index to a record
    C.
    To perform fast searches
    D.
    All of the mentioned

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  2. How many types of indexes are there in sql server?
    3. A.
    1
    B.
    2
    C.
    3
    D.
    4

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  3. How non clustered index point to the data?
    4. A.
    It never points to anything
    B.
    It points to a data row
    C.
    It is used for pointing data rows containing key values
    D.
    None of the mentioned

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  4. Which one is true about clustered index?
    5. A.
    Clustered index is not associated with table
    B.
    Clustered index is built by default on unique key columns
    C.
    Clustered index is not built on unique key columns
    D.
    None of the mentioned

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  5. What is true about indexes?
    6. A.
    Indexes enhance the performance even if the table is updated frequently
    B.
    It makes harder for sql server engines to work to work on index which have large keys
    C.
    It doesn't make harder for sql server engines to work to work on index which have large keys
    D.
    None of the mentioned

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  6. Does index take space in the disk ?
    7. A.
    It stores memory as and when required
    B.
    Yes, Indexes are stored on disk
    C.
    Indexes are never stored on disk
    D.
    Indexes take no space

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  7. What are composite indexes ?
    8. A.
    Are those which are composed by database for its internal use
    B.
    A composite index is a combination of index on 2 or more columns
    C.
    Composite index can never be created
    D.
    None of the mentioned

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  8. If an index is _________________ the metadata and statistics continue to exists
    9. A.
    Disabling
    B.
    Dropping
    C.
    Altering
    D.
    Both a and b

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  9. In _______________ index instead of storing all the columns for a record together, each column is stored separately with all other rows in an index.
    10. A.
    Clustered
    B.
    Column store
    C.
    Non clustered
    D.
    Row store

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  10. A _________________ index is the one which satisfies all the columns requested in the query without performing further lookup into the clustered index.
    11. A.
    Clustered
    B.
    Non Clustered
    C.
    Covering
    D.
    B-Tree

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