Microsoft Microsoft Certifications AZ-400 Questions & Answers

• Question 111:

  HOTSPOT

  You have a project in Azure DevOps that contains a release pipeline. The pipeline contains two stages named QA and Prod. QA deploys code to an Azure web app named webapp1. Prod deploys code to an Azure web app named webapp2.

  You need to ensure that code deployments to webapp2 are blocked if Azure Application Insights generates Failed requests alerts following the deployment of new code to webapp1.

  What should you do for each stage? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Reference: https://learn.microsoft.com/en-us/azure/azure-monitor/app/continuous-monitoring

• Question 112:

  HOTSPOT

  You have an Azure subscription.

  You need to create a storage account by using a Bicep file.

  How should you complete the file? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

• Question 113:

  HOTSPOT

  You are using Agile process methodologies in Azure DevOps.

  You need to deploy a dashboard that will provide progress reports for the following work items:

  How long it took to close a work item after it was created.

  How long it took to close a work item after the work was started.

  Which type of widget should you use for each work item? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

• Question 114:

  HOTSPOT

  You plan to use Desired State Configuration (DSC) to maintain the configuration of a server that runs Windows Server 2019.

  The server must have the following features installed:

  A web server An email server

  How should you complete the DSC configuration file? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Explanation:

  Box 1: = @("SMTP-Server", "Web-Server")

  The following configuration ensures that the Web-Server (IIS) and SMTP (email) Server features, and all subfeatures of each, are installed.

  configuration FeatureSetTest

  {

  Import-DscResource -ModuleName PSDesiredStateConfiguration

  Node localhost

  {

  WindowsFeatureSet WindowsFeatureSetExample

  {

  Name = @("SMTP-Server", "Web-Server")

  Ensure = 'Present'

  IncludeAllSubFeature = $true

  } } }

  Box 2: Ensure

  Ensure indicates whether the roles or features are added. To ensure that the roles or features are added, set this property to Present. To ensure that the roles or features are removed, set the property to Absent. The default value is Present.

  Reference: https://docs.microsoft.com/en-us/powershell/dsc/reference/resources/windows/windowsFeatureSetResource

• Question 115:

  HOTSPOT

  You use Git for source control. You have an app named App1.

  In the main branch, you need to restore the third most recent revision of a file named App.exe.config.

  How should you complete the command? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Explanation:

  Box 1: checkout If you have deleted the file and already committed the changes, you need to use the `git checkout` command to restore the file. First, you need to find out the checksum of the commit that deleted the file, and then check out the file from the previous commit.

  Box 2: --staged use "git restore --staged ..." to unstage

  You need to run `git restore --staged --worktree `. The `--staged` argument tells `git` to restore the file in the index from HEAD, and the `--worktree` argument tells Git to restore the working tree as well.

  Reference: https://rewind.com/blog/recovering-deleted-files-in-github/

• Question 116:

  HOTSPOT

  You company uses a Git source-code repository.

  You plan to implement GitFlow as a workflow strategy.

  You need to identify which branch types are used for production code and preproduction code in the strategy.

  Which branch type should you identify for each code type? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Explanation:

  Box 1: Main

  When using the git-flow extension library, executing git flow init on an existing repo will create the develop branch:

  $ git flow init

  Initialized empty Git repository in ~/project/.git/

  No branches exist yet. Base branches must be created now.

  Branch name for production releases: [main]

  Branch name for "next release" development: [develop]

  How to name your supporting branch prefixes?

  Feature branches? [feature/]

  Release branches? [release/]

  Hotfix branches? [hotfix/]

  Support branches? [support/]

  Version tag prefix? []

  $ git branch

  * develop main

  Box 2: Develop

  Note: The overall flow of Gitflow is:

  A develop branch is created from main A release branch is created from develop Feature branches are created from develop When a feature is complete it is merged into the develop branch When the release branch is done it is merged into develop and main If an issue in main is detected a hotfix branch is created from main Once the hotfix is complete it is merged to both develop and main

  Reference: https://www.atlassian.com/git/tutorials/comparing-workflows/gitflow-workflow

• Question 117:

  HOTSPOT

  You use Git for source control.

  You need to optimize the performance of a repository. The solution must meet the following requirements:

  Permanently remove all items referenced only in the reflog.

  Remove history that is NOT in any current branch.

  How should you complete the command? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Explanation:

  Box 1: reflog

  Permanently remove all items referenced only in the reflog.

  You need, specifically, the --expire-unreachable option:

  git reflog expire --expire=90.days.ago --expire-unreachable=now --all

  Box 2: gc

  Remove history that is NOT in any current branch.

  In most cases, users will not need to call git prune directly, but should instead call git gc, which handles pruning along with many other housekeeping tasks.

  git-gc - Cleanup unnecessary files and optimize the local repository

  SYNOPSIS

  git gc [--aggressive] [--auto] [--quiet] [--prune= | --no-prune] [--force] [--keep-largest-pack]

  Options include:

  --prune=

  Prune loose objects older than date (default is 2 weeks ago, overridable by the config variable gc.pruneExpire). --prune=now prunes loose objects regardless of their age and increases the risk of corruption if another process is writing to the

  repository concurrently; see "NOTES" below. --prune is on by default.

  Box 3: now

  Reference: https://stackoverflow.com/questions/49067898/git-remove-old-reflog-entries

  https://git-scm.com/docs/git-prune https://git-scm.com/docs/git-gc

• Question 118:

  HOTSPOT

  You are creating a YAML-based Azure pipeline to deploy an Azure Data factory instance that has the following requirements;

  1.

  If a Data Factory instance exists already, the instance must be overwritten.

  2.

  No other resources in a resource group named Fabrikam must be affected.

  How should you complete the code? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  

  Hot Area:

  

  Correct Answer:

  

• Question 119:

  HOTSPOT

  You have a project in Azure DevOps that contains a Continuous Integration/Continuous Deployment (CI/CD) pipeline.

  You need to enable detailed logging by defining a pipeline variable.

  How should you configure the variable? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Explanation:

  Box 1: system.debug To configure verbose logs for all runs, you can add a variable named system.debug and set its value to true. Note: Verbose logging is the practice of recording to a persistent medium as much information as you possibly can about events that occur while the software runs. Box 2: true Reference: https://docs.microsoft.com/en-us/azure/devops/pipelines/troubleshooting/review-logs

• Question 120:

  HOTSPOT

  You have an Azure web app named webapp1 that uses the .NET Core runtime stack. You have an Azure Application Insights resource named AppInsights1 that collects telemetry data generated by webapp1.

  You plan to deploy webapp1 by using an Azure DevOps pipeline.

  You need to modify the sampling rate of the telemetry data processed by AppInsights1 without having to redeploy webapp1 after each modification.

  What should you do? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Explanation:

  Box 1: Modify ApplicationInsights.config

  In ApplicationInsights.config, you can adjust several parameters in the AdaptiveSamplingTelemetryProcessor node. The figures shown are the default values:

  5

  The target rate of logical operations that the adaptive algorithm aims to collect on each server host. If your web app runs on many hosts, reduce this value so as to remain within your target rate of traffic at the Application Insights portal.

  00:00:15

  The interval at which the current rate of telemetry is reevaluated. Evaluation is performed as a moving average. You might want to shorten this interval if your telemetry is liable to sudden bursts.

  Etc.

  Box 2: Modify the Usage and estimated costs settings.

  Ingestion sampling Use this type of sampling if your app often goes over its monthly quota and you don't have the option of using either of the SDK-based types of sampling. Set the sampling rate in the Usage and estimated costs page:

  Incorrect:

  *

  Smart detection Proactive diagnostics is a recent feature. Without any special configuration by you, Application Insights automatically detects and alerts you about unusual rises in failure rates in your app. It's smart enough to ignore a background of occasional failures, and also rises that are simply proportionate to a rise in requests. So for example, if there's a failure in one of the services you depend on, or if the new build you just deployed isn't working so well, then you'll know about it as soon as you look at your email. (And there are webhooks so that you can trigger other apps.)

  Another aspect of this feature performs a daily in-depth analysis of your telemetry, looking for unusual patterns of performance that are hard to discover. For example, it can find slow performance associated with a particular geographical area, or with a particular browser version.

  *

  Continuous Export Want to keep your telemetry for longer than the standard retention period? Or process it in some specialized way? Continuous Export is ideal for this purpose. The events you see in the Application Insights portal can be exported to storage in Microsoft Azure in JSON format. From there, you can download your data and write whatever code you need to process it.

  Reference: https://docs.microsoft.com/en-us/azure/azure-monitor/app/sampling https://docs.microsoft.com/en-us/azure/azure-monitor/app/devops#smart-detection