[Solved] Given this simplified state machine code snippet:state = 'placed' event = 'ship_order' if state == 'placed' and event == 'ship_order':... | LLD

LLD - Design — Food Delivery System

Given this simplified state machine code snippet:

state = 'placed'
event = 'ship_order'
if state == 'placed' and event == 'ship_order':
    state = 'shipped'
elif state == 'shipped' and event == 'deliver_order':
    state = 'delivered'
print(state)

What will be the output if event = 'deliver_order' when state = 'placed'?

Ashipped

Bdelivered

Cplaced

Derror

Step-by-Step Solution

Solution:

Step 1: Check condition for event 'deliver_order' when state is 'placed'
The first if checks for 'ship_order' event; it does not match 'deliver_order'. The elif checks for 'shipped' state, but current state is 'placed'.
Step 2: Determine state after conditions
No condition matches, so state remains unchanged as 'placed'.
Final Answer:
placed -> Option C
Quick Check:
No matching transition keeps state same [OK]

Quick Trick: If no condition matches, state stays unchanged [OK]

Common Mistakes:

Assuming event triggers transition regardless of current state
Confusing elif with else
Expecting error without exception handling

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Given this simplified state machine code snippet:

Step 1: Check condition for event 'deliver_order' when state is 'placed'

Step 2: Determine state after conditions

Final Answer:

Quick Check:

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