What factor influences lock escalation、

试卷相关题目

• 1Which isolation level offers the greatest protection of data but provides the least amount of concurrency、

  A.Read Stability (RS)

  B.Cursor Stability (CS)

  C.Repeatable Read (RR)

  D.Uncommitted Read (UR)

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• 2What is the primary function of an Online Transaction Processing (OLTP) workload、

  A.To combine data from multiple sources.

  B.To discover hidden relationships in data.

  C.To analyze large amounts of data to find patterns.

  D.To make changes to a small number of records within a single transaction.

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• 3Which two activities indicate the need for a data warehouse、 (Choose two.)

  A.Confirm product inventory.

  B.Monitor product availability.

  C.Summarize sales by region.

  D.Identify patterns for products sold in the last five years.

  E.Associate one or more products with a purchase order.

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• 4Which tool allows users to connect to a DB2 database using a wizard、

  A.Control Center

  B.IBM Data Studio

  C.Universal Connection Expert

  D.DB2 Connection Pool Manager

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• 5What is the purpose of the Query Tuner、

  A.To automatically capture and stop rogue queries.

  B.To provide recommendations and analysis for tuning a single query.

  C.To provide recommendations and analysis for tuning up to 100 queries.

  D.To recommend indexes and to guide DBAs through the process of creating new indexes.

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• 6Which type of lock allows the lock owner and all concurrent applications to read, but not update, the locked data、

  A.Share (S)

  B.Update (U)

  C.Exclusive (X)

  D.Intent Exclusive (IX)

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• 7Application APP_A is performing updates to table TAB1 using the cursor stability (CS) isolation level. If application APP_B wants to retrieve all rows from table TAB1 without waiting for application APP_A to finish making updates, what isolation level must application APP_B use、

  A.Read Stability (RS)

  B.Repeatable Read (RR)

  C.Uncommitted Read (UR)

  D.Cursor Stability (CS)

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• 8Which statement will prevent concurrent application processes from performing anything other than read-only operations against a table named TAB1、

  A.LOCK TABLE tab1 IN READ MODE

  B.LOCK TABLE tab1 IN SHARE MODE

  C.LOCK TABLE tab1 IN EXCLUSIVE MODE

  D.LOCK TABLE tab1 IN READ-ONLY MODE

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• 9When is an INTENT EXCLUSIVE (IX) lock required、

  A.When a transaction intends to read or change data.

  B.When a transaction intends to change but not read data.

  C.When a transaction intends to read but not change data.

  D.When a transaction intends to change the system catalog.

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• 10What is the act of exchanging one lock an application holds on a resource for a more restrictive lock on the same resource known as、

  A.Lock escalation

  B.Lock substitution

  C.Lock switch/exchange

  D.Lock conversion/promotion

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