When a user attempts to borrow a book that is currently checked out, what is the typical sequence of system responses in a well-designed Library Management System?
easy🧠🧾 Concept Trace Q3 of Q15
OOP & Design Patterns - Design a Library Management System - LLD with Relationships & Edge Cases
When a user attempts to borrow a book that is currently checked out, what is the typical sequence of system responses in a well-designed Library Management System?
ASystem immediately denies the request without any notification or option to reserve
BSystem automatically extends the current loan period to accommodate the new request
CSystem allows the loan request to proceed and queues the loan internally without user notification
DSystem checks book availability, denies loan, and offers the user an option to place a reservation
Step-by-Step Solution
Solution:
Step 1: Check availability of the requested book copy
The system verifies if the book copy is currently loaned out.
Step 2: Deny loan if the book is unavailable
If the book is checked out, the loan request is denied to prevent double-loaning.
Step 3: Offer reservation to the user
The system offers the user an option to reserve the book for when it becomes available.
Final Answer:
Option D -> Option D
Quick Check:
Loan denied + reservation option is standard practice [OK]
Quick Trick:Unavailable book -> deny loan + offer reservation [OK]
Common Mistakes:
MISTAKES
Allowing loan without availability check
Denying silently without reservation option
Automatically extending current loans
Trap Explanation:
PITFALL
Candidates may overlook user experience by denying silently or allowing invalid loans.
Interviewer Note:
CONTEXT
Tests understanding of system flow and user interaction in edge cases.
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