Concept:
Database Management Systems classify users according to how they interact with the database and the complexity of operations they perform.
Step-by-Step Analysis:
• Parametric End Users:
These users repeatedly execute predefined database transactions using forms, menus, and standard interfaces. Examples include bank tellers, reservation clerks, and data-entry operators.
• Casual End Users:
These users access the database occasionally and may issue different queries whenever needed.
• Sophisticated End Users:
These users possess advanced knowledge of database systems and often develop complex queries or applications.
• Standalone Users:
These users maintain personal databases using ready-made software packages.
• Evaluate the given scenario:
Reservation clerks repeatedly perform tasks such as checking availability, making reservations, and updating booking information through predefined interfaces.
Conclusion:
Since reservation clerks perform repetitive transactions through fixed database forms and screens, they are classified as Parametric End Users. Therefore, option (B) is correct.