IBM IBM Certified Advanced Database Administrator A2090-610 Questions & Answers

• Question 111:

  What 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

  Correct Answer: D

• Question 112:

  What isolation level prevents dirty reads, nonrepeatable reads, and phantoms?

  A. Read stability (RS)

  B. Cursor stability (CS)

  C. Repeatable read (RR)

  D. Uncommitted read (UR)

  Correct Answer: C

• Question 113:

  When 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.

  Correct Answer: A

• Question 114:

  Which 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

  Correct Answer: B

• Question 115:

  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)

  Correct Answer: A

• Question 116:

  Application 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)

  Correct Answer: C

• Question 117:

  What factor influences lock escalation?

  A. Table size

  B. Buffer space

  C. Number of locks

  D. Available real storage

  Correct Answer: C

• Question 118:

  What 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.

  Correct Answer: D

• Question 119:

  Which 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)

  Correct Answer: C

• Question 120:

  Which 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

  Correct Answer: B