Question 1

What is a user journey in the context of a service?

Options :

A : The set of features offered by a service

B : The reliability of a service from the provider-s perspective

C : The interaction between the user and the service

D : The sequence of tasks critical to the user-s experience offered by the service

Answer: D

Question 2

The NGINX-based application was recently deployed by your team on Google Kubernetes Engine (GKE) and exposed to the public through an HTTP Google Cloud Load Balancer (GCLB) ingress. You intend to increase the frontend deployment of the application using a suitable Service Level Indicator (SLI).

What actions do you need to take?

Options :

A : Configure the horizontal pod autoscaler to use the average response time from the Liveness and Readiness probes.

B : Configure the vertical pod autoscaler in GKE and enable the cluster autoscaler to scale the cluster as pods expand.

C : Install the Stackdriver custom metrics adapter and configure a horizontal pod autoscaler to use the number of requests provided by the GCLB.

D : Expose the NGINX stats endpoint and configure the horizontal pod autoscaler to use the request metrics exposed by the NGINX deployment.

Answer: C

Question 3

Your team is designing a new application for deployment both inside and outside Google Cloud Platform (GCP). You need to collect detailed metrics such as system resource utilization. You want to use centralized GCP services while minimizing the amount of work required to set up this collection system. What should you do?

Options :

A :

Import the Stackdriver Profiler package, and configure it to relay function timing data to Stackdriver for further analysis.

B :

Import the Stackdriver Debugger package, and configure the application to emit debug messages with timing information.

C :

Instrument the code using a timing library, and publish the metrics via a health check endpoint that is scraped by Stackdriver

D :

Install an Application Performance Monitoring (APM) tool in both locations, and configure an export to a central data storage location for analysis.

Answer: A

Question 4

You support a high-traffic web application with a microservice architecture. The home page of the application displays multiple widgets containing content such as the current weather, stock prices, and news headlines. The main serving thread makes a call to a dedicated microservice for each widget and then lays out the homepage for the user. The microservices occasionally fail; when that happens, the serving thread serves the homepage with some missing content. Users of the application are unhappy if this degraded mode occurs too frequently, but they would rather have some content served instead of no content at all. You want to set a Service Level Objective (SLO) to ensure that the user experience does not degrade too much. What Service Level Indicator {SLI) should you use to measure this?

Options :

A : A quality SLI: the ratio of non-degraded responses to total responses

B : An availability SLI: the ratio of healthy microservices to the total number of microservices

C : A freshness SLI: the proportion of widgets that have been updated within the last 10 minutes

D :

A latency SLI: the ratio of microservice calls that complete in under 100 ms to the total number of microservice calls

Answer: B

Question 5

What is a sidecar pattern in Kubernetes?

Options :

A : A type of Pod with multiple containers where one container supports the main application container

B : A type of Pod that runs only one container

C : A type of Pod with multiple containers that share the same resources

D : A type of Pod with multiple containers that run independently

Answer: A