[Solved] Given this pseudocode, what will be the output if the main service call fails?... Given this pseudocode, what will be the output if the main service call fails? | Microservices

Microservices - Resilience Patterns

Given this pseudocode, what will be the output if the main service call fails? try { response = callMainService() } catch (Exception e) { response = fallbackResponse() } print(response) Assuming callMainService() throws an exception and fallbackResponse() returns "Backup Data".

A"Error"

B"Backup Data"

C"null"

D"Main Service Data"

Step-by-Step Solution

Solution:

Step 1: Analyze try-catch behavior
If callMainService() throws an exception, the catch block executes and assigns fallbackResponse() result to response.
Step 2: Determine fallbackResponse() output
fallbackResponse() returns "Backup Data", so response will be "Backup Data".
Final Answer:
"Backup Data" -> Option B
Quick Check:
Fallback triggers on exception = "Backup Data" [OK]

Quick Trick: Fallback runs on exception, returns backup data [OK]

Common Mistakes:

MISTAKES

Assuming main service data prints despite failure
Confusing exception with null response
Expecting error message printed

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Given this pseudocode, what will be the output if the main service call fails?

Step 1: Analyze try-catch behavior

Step 2: Determine fallbackResponse() output

Final Answer:

Quick Check:

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