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MCQ 261: The first step in accessing a database from a Java program is to:

  1. Open a connection
  2. Open a query
  3. Open a statement
  4. Open a database

MCQ 262: We are often interested in superkeys for which no proper subset is a:

  1. Superset key
  2. Superkey
  3. Primary key
  4. Unique key

MCQ 263: Scalar subqueries are also useful in SQL:

  1. Insertion statements
  2. Deletion statement
  3. Update statements
  4. Retrieval statement

MCQ 264: The aggregate operations, when an empty collection is applied on the function, return a:

  1. 0
  2. 1
  3. Undefined value
  4. Null value

MCQ 265: ODBC defines the types:

  1. HENV
  2. HDBC
  3. RETCODE
  4. All of the Above

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