Abstract: An apparatus stores teacher data including first question-information and first answer-information associated therewitg, and supplementary information each piece of which is associated With one or more keywords that are used within the teacher data in connection therewith. The apparatus extracts first keywords tom the teacher data, and adjust parameter-values which are used for calculating a predicted-reliability of each piece of the first answer-information and each associated with one of pieces of the supplementary information, based on the supplementary information associated with the first keywords, and right/wrong in:formation indicating whether the first answer-information is a right answer.

Abstract: A distributed processing system is capable of executing an operation for a shared file system, based on inputting a command to one node. A file operation client of the node to which the command for operating the shared file system is inputted, indicates a file operation server of each of all the nodes configuring the distributed processing system to update a shared file system management file possessed by each node in accordance with the command, and indicates the file operation server of its own node to update a node information table and a device information table in each of disks configuring the shared file system.