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Answer: Stackdriver Debug Logpoints
The question requires diagnosing application code issues in a deployed App Engine Standard API without redeployment. Stackdriver Debugger provides tools for this purpose. - **Stackdriver Trace (A)** focuses on latency analysis, not code debugging. - **Stackdriver Monitoring (B)** tracks system metrics (e.g., CPU, latency) but doesn't inspect code execution. - **Stackdriver Debug Snapshots (C)** capture variable states at specific code lines, useful for static breakpoints. - **Stackdriver Debug Logpoints (D)** inject temporary logs to monitor variable values or flow over time without redeployment. Since the goal is to monitor the application over time, Debug Logpoints (D) are optimal for gathering dynamic, ongoing insights into code behavior.
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You have deployed a new API to App Engine Standard environment, but it's not functioning as expected during testing. To diagnose issues in the application code without redeploying, which Google Cloud tool should you use for monitoring over time?
A
Stackdriver Trace
B
Stackdriver Monitoring
C
Stackdriver Debug Snapshots
D
Stackdriver Debug Logpoints