Free IBM C2090-623 Exam Actual Questions & Explanations

Last updated on: Jun 16, 2026

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Question No. 1

A report author gets the following error message:

''An error has occurred. Please contact your administrator. The complete error has been logged by CAF with SecureErrorID:2004-05-25-15:44:11.296-#9.''

How can the administrator get the complete error message?

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Correct Answer: B

To find out about the actual error though an administrator with file access to the server log (cogserver.log) will need to search that log for the SecureErrorID given in the on-screen message.

References: http://www-01.ibm.com/support/docview.wss?uid=swg21344157


Question No. 2

An environment has two dispatchers with report servers installed on two machines with following configuration:

Dispatcher 1 on Computer A

Dispatcher 2 on Computer B

What should the setting of processing capacity for Dispatcher 2 be set to, if the capacity for Dispatcher 1 is set to 1?

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Correct Answer: B

If your installation includes more than one dispatcher, you can specify the proportion of requests that each dispatcher handles by changing their processing capacity.

This is commonly referred to as load balancing. You typically set the capacity for a dispatcher based on the CPU speed of the computer where it is installed.

For example, a first dispatcher is installed on a 2 GHz computer and a second dispatcher on a 1 GHz computer. You set the processing capacity of the first dispatcher to 2.0 and the second to 1.0. The first dispatcher handles two-thirds of the requests while the second handles one-third of the requests. If you set the capacity of both dispatchers to 1.0, requests are sent to each dispatcher alternately.

The default processing capacity for each dispatcher is 1.0.

References: https://www.ibm.com/support/knowledgecenter/SSEP7J_11.0.0/com.ibm.swg.ba.cognos.ug_cra.doc/t_balancerequestsamongdispatchers.html#BalanceRequestsAmongDispatchers


Question No. 3

An administrator is tuning the Caching services to improve Dynamic cube report performance. At the same time, there is a need to control the memory usage and Clear Cache.

How is this done?

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Correct Answer: B

To avoid using outdated data that might be stored in the cache, you can clear the cache. You might want to clear the cache manually if your data source metadata changes infrequently or if you want to clear the cache in between automatically scheduled cache clearing. When you clear the cache using the following steps, it clears everything in the cache.

Steps

1. Start IBM Cognos Connection.

2. In the upper-right corner, click Launch, IBM Cognos Administration.

3. On the Configuration tab, click Query Service Caching.

4. Select the server groups for cache clearing.

5. Click Clear cache.The status of the Clear cache command is displayed.If a cache is being used by one or more pending reports or queries, it is internally flagged as ''stale'' by this command and is automatically cleared as soon as this usage completes.

6. Click Close.

References: IBM Cognos Administration Version 10.1.0, Administration and Security Guide, page 253


Question No. 4

An administrator needs to ensure that users do not have to enter/select Database credentials when running reports.

What must a datasource have in order to accomplish this?

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Correct Answer: C

You add signons to data source connections so that users do not have to enter database credentials when they run reports.

References: https://www.ibm.com/support/knowledgecenter/en/SSEP7J_11.0.0/com.ibm.swg.ba.cognos.ug_cra.doc/c_datasources.html


Question No. 5

Where can uploaded visualizations within the IBM Cognos Administration console be managed?

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