[Solved] Consider this pseudo-code for confirming a hold: if hold.exists(hold_id) and not hold.is_expired(hold_id): reservation.create(hold.resource) hold.remove(hold_id) return "Confirmed" else:... | LLD

LLD - Design — Library Management System

Consider this pseudo-code for confirming a hold:

if hold.exists(hold_id) and not hold.is_expired(hold_id):
    reservation.create(hold.resource)
    hold.remove(hold_id)
    return "Confirmed"
else:
    return "Failed"

What will be the output if the hold has expired?

A"Failed"

B"Confirmed"

CError due to missing hold

D"Confirmed" but resource is double booked

Step-by-Step Solution

Solution:

Step 1: Check hold existence and expiration
The code confirms only if hold exists and is not expired.
Step 2: Analyze expired hold case
If hold is expired, condition fails and returns "Failed" without creating reservation.
Final Answer:
"Failed" -> Option A
Quick Check:
Expired hold = "Failed" confirmation [OK]

Quick Trick: Expired holds cause confirmation to fail [OK]

Common Mistakes:

MISTAKES

Assuming expired holds confirm successfully
Expecting errors instead of failure message
Ignoring hold expiration check

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Consider this pseudo-code for confirming a hold:

Step 1: Check hold existence and expiration

Step 2: Analyze expired hold case

Final Answer:

Quick Check:

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