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IBM C2090-619 IBM Informix 12.10 System Administrator Exam Practice Test

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Total 130 questions

IBM Informix 12.10 System Administrator Questions and Answers

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Question 1

Which one keyword in this query makes the AVG an OLAP window expression instead of the regular aggregate operator? SELECT AVG(SUM(dollars)) OVER() FROM sales;

Options:

A.

SUM

B.

OVER

C.

FROM

D.

AVG(SUM(dollars))

Question 2

Which statement is FALSE about dbspace configurable page sizes?

Options:

A.

Dbspace page size can only be set for non-critical dbspaces.

B.

Possible page sizes are multiples of the default page size up to 16 kb.

C.

Configure page sizes as close to the backup / restore and network buffer size as possible for efficient data transfer across the wire.

D.

Dbspace page size should be configured to accommodate the greatest number of average row sizes with a minimum of remainder pages beingused.

Question 3

Which technology does NOT use the Secure Sockets Layer (SSL) protocol for an end-to-end secure connection?

Options:

A.

On-disk encryption

B.

Enterprise Replication

C.

High-Availability Data Replication

D.

Server-to-server distributed query communication

Question 4

Which type of device does Primary Storage Manager support?

Options:

A.

File

B.

Tape

C.

Directory

D.

Named pipe

Question 5

Given the following statement: UPDATE STATISTICS LOW FOR TABLE customer (customer_num); Which catalog table data is NOT updated?

Options:

A.

sysdistrib

B.

systables

C.

sysindexes

D.

syscolumns

Question 6

Given an OLTP environment with a very large table, which configuration parameter can be set to allocate more memory for sorting when building an index on the large table?

Options:

A.

DBUPSPACE

B.

DS_POOLSIZE

C.

VP_MEMORY_CACHE_KB

D.

DS_NONPDQ_QUERY_MEM

Question 7

Which Informix utility can be used to customize the onconfig file?

Options:

A.

ifxdeploy

B.

genoncfg

C.

dbaccess

D.

onparams

Question 8

To potentially reduce table extent interleaving, an Informix administrator would execute which storage optimization operation?

Options:

A.

Shrink

B.

Repack

C.

Compress

D.

Defragment

Question 9

Several operating-system kernel configuration parameters can affect the use of shared memory by the database server. Which two kernel parameters may need to be configured? (Choose two.)

Options:

A.

Memory page size.

B.

Total number of available semaphores.

C.

Lower-boundary address for shared memory.

D.

Total memory presented to the operating system.

E.

Maximum operating-system shared-memory segment size.

Question 10

How can you ensure to hold the an update lock until the end of a transaction when fetching rows from a cursor?

Options:

A.

Use the 'Committed Read' isolation level.

B.

Use the RETAIN UPDATE LOCKS clause with isolation level.

C.

Use the 'Cursor Stability' isolation level along the WITH HOLD clause.

D.

Use the SET TRANSACTION command to with SERIALIZABLE clause.

Question 11

When the server is in administration mode, which users are NOT allowed to connect?

Options:

A.

informix

B.

Members of the DBSA group

C.

Members of the DBSSO group

D.

Users specified by ADMIN_MODE_USERS

Question 12

The purge policy CANNOT be executed for a rolling window table utilizing which method?

Options:

A.

By calling the syspurge function.

B.

By the purge_tables task of the Scheduler.

C.

By setting up the server to automatically run the purge policy.

D.

By running ALTER FRAGMENT with the PURGE NOW predicate.

Question 13

When using the deployment assistant, which two statements are true? (Choose two.)

Options:

A.

A java environment must be configured.

B.

The Informix user account must be used.

C.

Chunks can be raw devices or buffered files.

D.

The user must have connect permission to all databases.

E.

The user must have connect privilege to sysadmin database.

Question 14

Which statement is FALSE?

Options:

A.

A new index can be created compressed.

B.

Attached indexes cannot be compressed.

C.

A compressed index can be uncompressed.

D.

A compressed index cannot be uncompressed.

Question 15

Which statement is valid about Data consolidation using send-only replicates?

Options:

A.

You can have more than one target server.

B.

You cannot modify a server to change its mode to send-only.

C.

You cannot use this replicate for tables that include TimeSeries columns.

D.

You need to define a different replicate for each send-only primary server.

Question 16

In addition to examining the Connection Manager log file, what are two ways to monitor the Connection Manager status? (Choose two.)

Options:

A.

onstat

B.

onmode

C.

oncmsm

D.

onmonitor

E.

OpenAdmin Tool

Question 17

Which option maximizes performance in an Informix Warehouse (DSS) environment?

Options:

A.

Higher value of LOGBUFF.

B.

Higher value of PHYSBUFF.

C.

Higher value of BUFFERPOOL and lower value of DS_TOTAL_MEMORY.

D.

SHMTOTAL set to 0 to allow Informix to access all available physical memory.

Question 18

When free memory is limited, which configuration parameter should be set to allow critical database activities to complete successfully?

Options:

A.

LOW_MEMORY_SVR

B.

LOW_MEMORY_MGR

C.

LOW_MEMORY_RESERVE

D.

LOW_MEMORY_PRESERVE

Question 19

The sector option for cdr utility is used to perform what operation?

Options:

A.

Dynamically convert ER cluster instances in order to perform rolling upgrades.

B.

Dynamically convert H/A cluster instances in order to perform rolling upgrades.

C.

Dynamically reconfigure Connection Manager SLAs for ER clusters in order to perform rolling upgrades.

D.

Dynamically reconfigure Connection Manager SLAs for H/A clusters in order to perform rolling upgrades.

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Total 130 questions