4
Q:

The DBA can set the registry variable DB2_HASH_JOIN on or off because:

A) hash joins may require more resources to run. B) hash joins are not used unless outer joins are requested.
C) If hash joins are enabled, no other join method can be used. D) Hash joins are only needed when the tables are portioned using hash keys.

Answer:   A) hash joins may require more resources to run.



Explanation:
Q:

Proxy servers have two main purposes :

1. Improve Performance  (and)

2.  is  ______ ?

A) Transmit Request B) Decrease Requests
C) Increase Requests D) Filter Requests
 
Answer & Explanation Answer: D) Filter Requests

Explanation:
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4 31
Q:

which of the following represents a set of properties that guarantee that database transactions are processed reliably in computer science ?

A) Buffer Cache B) ACID
C) Foreign Key D) None
 
Answer & Explanation Answer: B) ACID

Explanation:

ACID means (Atomicity, Consistency, Isolation, Durability) is a set of properties of database transactions intended to guarantee validity even in the event of errors, power failures, etc.

In the context of databases, a sequence of database operations that satisfies the ACID properties and, thus, can be perceived as single logical operation on the data, is called a transaction. For example, a transfer of funds from one bank account to another, even involving multiple changes such as debiting one account and crediting another, is a single transaction.

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Job Role: Analyst , IT Trainer

5 72
Q:

With database logging, where are transaction records first placed?

A) in the logical log buffer B) in the primary chunk
C) in the physical buffer D) in a temporary database table
 
Answer & Explanation Answer: A) in the logical log buffer

Explanation:
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4 1460
Q:

Suppose an installed z/OS customer also has Power6 Servers. They are investigating consolidation of both types of servers to z/OS.Which of the following will establish the capacity for a new z/OS server?

A) AD Tools B) CP3000
C) Estimate the AIX load and add to CP3000 results. D) Run AIX in a z/OS LPAR to establish the loadWArialTimes New RomanZ
 
Answer & Explanation Answer: C) Estimate the AIX load and add to CP3000 results.

Explanation:
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3 944
Q:

Which of the following DB2 data types CANNOT be used to contain the date an employee was hired?

A) CLOB B) TIME
C) VARCHAR D) TIMESTAMP
 
Answer & Explanation Answer: B) TIME

Explanation:
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4 1433