CertBus New Updated A2090-610 Exam Dumps Free Download

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QUESTION NO:5

Which 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

Answer: A

QUESTION NO:3

Which DB2 object can be used to improve theexecution performance of qualified SELECT

statements?

A. Trigger

B. SQL Procedure

C. Sequence Object

D. Materialized Query Table

Answer: D

2

QUESTION NO:17

What is the purpose ofthe 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 DBAsthrough the process of creating new indexes.

Answer: B

QUESTION NO:22

What factor influences lock escalation?

A. Table size

B. Buffer space

C. Number of locks

D. Available real storage

Answer: C

8

QUESTION NO:23

Which 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)

Answer: A

QUESTION NO:7

3

Which action needs to be performed in order to complete the definition of an application-

period temporaltable?

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 createdthat prevents overlapping of the BUSINESS_TIME

period of the table.

Answer: C

QUESTION NO:26

When is an INTENT EXCLUSIVE (IX) lock required?

A. When atransaction 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.

Answer: A

QUESTION NO:19

Which 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.

7

Answer: C,D

QUESTION NO:28

Whatisolation level prevents dirty reads, nonrepeatable reads, and phantoms?

A. Read stability (RS)

B. Cursor stability (CS)

C. Repeatable read (RR)

D. Uncommitted read (UR)

Answer: C

10

QUESTION NO:21

Which isolation level offers the greatest protection of data but provides the least amount

ofconcurrency?

A. Read Stability (RS)

B. Cursor Stability (CS)

C. Repeatable Read (RR)

D. Uncommitted Read (UR)

Answer: C

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