C9520423 IBM WebSphere Portal 8.5 Solution Development Free Practice Test — 30 Questions

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A financial services firm running a critical IBM WebSphere Portal 8.5 deployment is experiencing sporadic performance degradation and occasional `NullPointerException` errors logged within the portal\'s Java Virtual Machine (JVM) during peak transaction hours. The errors are specifically traced to the User Profile Service, which is responsible for retrieving and managing user-specific data, including personalization attributes. The IT operations team has confirmed that the underlying Lightweight Directory Access Protocol (LDAP) server is responsive and healthy, and network latency to the LDAP server remains within acceptable parameters. What is the most probable underlying cause of these intermittent failures within the User Profile Service, and what is the most effective initial diagnostic and remediation strategy?

Inefficient or improperly configured caching mechanisms for user profile data, leading to race conditions or stale data access during high concurrency.
A recent, unannounced change in the corporate security policy that has inadvertently blocked access to specific user attributes required by the Portal.
Under-provisioning of JVM heap memory, causing frequent garbage collection cycles that disrupt the User Profile Service's operations.
A bug in a third-party portlet deployed on the portal that is making excessive and unmanaged calls to the User Profile Service.

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