Which statement about triggers is true、

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• 1When a user-defined function (UDF) is created and no schema is specified, what schema is used to store the UDF、

  A.The SYSIBM schema.

  B.The SYSFUN schema.

  C.A schema with the name of the UDF.

  D.A schema with the userid of the UDF definer.

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• 2When an application using a temporary table terminates or disconnects from the databaseunexpectedly, what happens to the temporary table and any data stored in it、

  A.The data in the table is deleted and the table persists.

  B.The data in the table is deleted and the table is implicitly dropped.

  C.The temporary table is converted to a base table and the data is delete

  D.D. The temporary table is converted to a base table and the data is persistent.

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• 3A table named STATES was created as follows:  CREATE TABLE states  (state_cd     CHAR(2) NOT NULL,   state_desc   CHAR(20)); CREATE UNIQUE INDEX indx1 ON states (state_cd); What will happen、

  A.An error will be returned and the operation will fail.

  B.A warning will be returned and the unique index INDX1 will become the index for the primary key.

  C.The primary key will be successfully added and the unique index INDX1 will be dropped and recreatedas the primary key index.

  D.The primary key will be successfully added, the unique index INDX1 will be dropped, and a new indexwill be created for the primary key.

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• 4Which statement regarding triggers is true、

  A.Only one INSERT, UPDATE, or DELETE trigger can be defined per table.

  B.Triggers cannot be modified, they must be dropped and recreated with new definitions.

  C.Adding a trigger to a table that already has rows in it will cause triggered actions to be fire

  D.D. Triggers can only be fired one time per statement irrespective of the number of rows affected.

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• 5Which statement is true about an index that is used to support a UNIQUE constraint、

  A.It must not contain more than one column.

  B.It cannot be used in a referential constraint.

  C.It must be defined with the UNIQUE attribute.

  D.It must be defined as UNIQUE WHERE NOT NULL.

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• 6Which two statements are true about foreign key constraints、 (Choose two.)

  A.The foreign key constraint columns must be supported by an index.

  B.The foreign key constraint columns must be defined as NOT NULL.

  C.The number and data types of foreign key constraint columns must match the parent key.

  D.The columns of one foreign key constraint cannot be used in another foreign key constraint.

  E.To define a foreign key constraint there must be an associated primary key or unique key in the same or different table.

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• 7What is the primary purpose of a view、

  A.To enable uniqueness.

  B.To ensure data clustering.

  C.To combine data from multiple tables.

  D.To optimize queries ran against multiple tables.

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• 8By default, a column defined as a TIMESTAMP includes which attributes、

  A.No fractional digits or time zone.

  B.6 fractional digits and no time zone.

  C.12 fractional digits plus a time zone.

  D.12 fractional digits and no time zon

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• 9Which is NOT a valid reason for creating an index、

  A.To allow queries to run more efficiently.

  B.To enforce constraints such as uniqueness on index keys.

  C.To order the columns of a table in ascending or descending sequence according to values in a row.

  D.To order the rows of a table in ascending or descending sequence according to the values in a column.

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• 10Which type of constraint can be used to ensure that an INTEGER column in a table will never be assigned more than one record that contains a NULL value、

  A.Unique constraint

  B.Primary key constraint

  C.Informational constraint

  D.Column default constraint

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