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  • Question

  • We have Market Basket data for 1,000 rental transactions at a Video Store. There are four videos for rent -- Video A, Video B, Video C and Video D. The probability that Video D will be rented given that Video C has been rented is known as ________ .


  • Options
  • A. the basic probability
  • B. support
  • C. lift
  • D. confidence

  • Correct Answer
  • confidence 

    • More questions

    • 1. An attribute is a(n):

    • Options
    • A. column of a table.
    • B. two dimensional table.
    • C. row of a table.
    • D. key of a table.
      • Discuss
    • 2. If a relation is in third normal form, it does not need to be in second normal form.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. What programming language(s) or scripting language(s) does Java Server Pages (JSP) support?

    • Options
    • A. VBScript only
    • B. Jscript only
    • C. Java only
    • D. All of the above are supported
      • Discuss
    • 4. The following SQL is which type of join: SELECT CUSTOMER_T. CUSTOMER_ID, ORDER_T. CUSTOMER_ID, NAME, ORDER_ID FROM CUSTOMER_T,ORDER_T WHERE CUSTOMER_T. CUSTOMER_ID = ORDER_T. CUSTOMER_ID

    • Options
    • A. Equi-join
    • B. Natural join
    • C. Outer join
    • D. Cartesian join
      • Discuss
    • 5. Locks placed by the DBMS are called ________ .

    • Options
    • A. implicit locks
    • B. explicit locks
    • C. exclusive locks
    • D. shared locks
      • Discuss
    • 6. The use of packaged data models can offer which of the following benefits?

    • Options
    • A. Reduce implementation time and costs
    • B. Higher quality models
    • C. Both A and B.
    • D. Neither A nor B.
      • Discuss
    • 7. The identifier of an entity will become the ________ of the new table.

    • Options
    • A. foreign key
    • B. main attribute
    • C. primary key
    • D. identity key
      • Discuss
    • 8. An autonomous homogenous environment is which of the following?

    • Options
    • A. The same DBMS is at each node and each DBMS works independently.
    • B. The same DBMS is at each node and a central DBMS coordinates database access.
    • C. A different DBMS is at each node and each DBMS works independently.
    • D. A different DBMS is at each node and a central DBMS coordinates database access.
      • Discuss
    • 9. Writing stored procedures takes less time than using Visual Basic or PowerBuilder to create an application.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. Datasets which reside on the user's hard drive are created by ADO.NET to facilitate the transformation of XML documents to and from relational database constructs.

    • Options
    • A. True
    • B. False
      • Discuss

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