Apps DBA Interview Questions Part 2

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• Yes, We can run unless you are running a process where workers are involved.

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No, because it will create tables while running first session when you start the 2nd session it will fail.

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Opatch is utility to apply database patch , In order to find Opatch version execute $ORACLE_HOME/OPatch/opatch version

You can check OPatch -lsinventory

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By writing ls -la in a linux terminal.

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Top is a operating system command, it will display top 10 processes which are taking high cpu and memory.

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A patch can be a solution for a bug/it can be a new feature.

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Oneoff, mini packs, family packs, maintenance packs, rollup patches, consolidated patches.

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An oneoff patch is a small patch of (20 to 90KB size) without any pre-requisites.

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A mini pack is one which will upgrade any product patchset level to next level like AD.H to AD.I

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A Family pack is one which will upgrade the patchset level of all the products in that family to particular patchset level.

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A maintenance pack will upgrade applications from one version to another like 12.0.6 to 12.1.1.

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A rollup patch is one which will deliver bug fixes identified after the release of any major application versions like 12.1.1 to 12.1.3

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Ad_applied_patches

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A patch can deliver solution for more than one bug, ad_applied_patches may not give u the perfect information as in case of ad_bugs.

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Mostly Applications Patches are applied through adpatch.

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APPS and SYSTEM user passwords

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Adpatch will create FND_INSTALL_PROCESSES and AD_DEFERRED_JOBS table when it will apply D, G and U drivers.

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FND_INSTALL_PROCESSES table will store the worker information like what job is assigned to which worker and its status. AD_DEFERRED_JOBS will come into picture when some worker is failed, it will be moved to AD_DEFERRED_JOBS table, from where again adpatch will take that job and try to reasign, after doing this 3 times if still that worker is failing, then adpatch will stop patching and throw the error that particular worker has failed.

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We need to apply C,D,G on concurrent node and C, G on web node. If it is U-driver we need to apply it on all nodes.

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Yes, because adpatch will connect to database and updates  database tables.

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