专业技术初级资格程序员基础知识DB2

试卷预览

• 1If the following command is executed: CREATE DATABASE test What is the page size (in kilobytes) of the database、

  A.4

  B.8

  C.16

  D.32

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• 2Given the following DDL statement: CREATE TABLE sales (item CHAR(20)); If a DBA wishes toincrease the size of the ITEM column, which SQL statement needs to be used、

  A.ALTER TABLE sales ADD COLUMN item CHAR(40);

  B.ALTER TABLE sales ALTER COLUMN item CHAR(40);

  C.ALTER TABLE sales MODIFY COLUMN item CHAR(40);

  D.ALTER TABLE sales ALTER COLUMN item SET DATA TYPE CHAR(40);

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• 3Which DB2 object can be used to improve the execution performance of qualified SELECT statements、

  A.Trigger

  B.SQL Procedure

  C.Sequence Object

  D.Materialized Query Table

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• 4When is it appropriate to use a sequence、

  A.When you want to control the order in which triggers are fired.

  B.When you want to control the order in which stored procedures can be invoked.

  C.When you want to automatically generate a numeric value that is not tied to any specific column or table.

  D.B. When you want to control the order in which stored procedures can be invoked.C. When you want to automatically generate a numeric value that is not tied to any specific column or tabl

  E.D. When you want to automatically generate a numeric value for each row that is added to a specific table.

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• 5Which clause should be included in a ALTER TABLE statement to update a table definition with a new column、

  A.ADD COLUMN

  B.ALTER COLUMN

  C.APPEND COLUMN

  D.RENAME COLUMN

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• 6Which object is a stored procedure defined into、

  A.Table

  B.Schema

  C.Package

  D.Database

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• 7Which action needs to be performed in order to complete the definition of an application-period temporal table、

  A.A transaction-start-id column must be defined for the table.

  B.A history table must be defined and associated with the base table.

  C.A BUSINESS_TIME period must be specified in a CREATE or ALTER of the table.

  D.A unique index must be created that prevents overlapping of the BUSINESS_TIME period of the tabl

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• 8What functionality allows users to perform a UNION operation between a DB2 table and an Oracle view、

  A.Oracle connect

  B.Trusted context

  C.Oracle federation

  D.Distributed request

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• 9You have a business need to query DB2 10 and DB2 9 databases and you want to write an application that can run on most platforms unchanged. Which interface would you use to achieve your goal、

  A.CLI

  B.XML

  C.JDBC

  D.RUBY

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• 10Which DB2 object is used to provide a logical grouping of other database objects、

  A.Alias

  B.Index

  C.Schema

  D.Collection

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