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IBM Cloud Platform Application Development v2 Sample Questions:

1. A developer wants to deploy and start a large application to IBM Bluemix PaaS.
When they enter the command cf push appname, the following error is shown:
0 of 1 instances running, 1 starting 0 of 1 instances running, 1 down FAILED Start app timeout
What option is available for the developer to resolve the issue?

A) Increase the upload timeout in manifest.yml of the application.
B) Increase the start timeout in manifest.yml of the application.
C) Increase the deploy timeout in manifest.yml of the application.
D) Increase the staging timeout in manifest.yml of the application.

2. Which three features are provided by IBM Bluemix DevOps Services? (Select three.)

A) database management
B) web code editor
C) application usage statistics
D) source control management
E) automatic unit test generation
F) Delivery Pipeline

3. A developer is building an IBM Cloud Foundry application that uses an enterprise service available as a RESTful API. Following security best practices, how should credentials for the service be stored?

A) In a properties file in the same code repository as the application
B) As constants in the application source code
C) In a file located within a custom buildpack
D) As environment variables in a user-provided service

4. An e-commerce web site currently consists of a 2-tier web application (app server + DB) deployed on IBM Cloud: 1 webapp instance for the Java front-end and 1 Cloudant instance for the DB.
Immediately after deployment on Bluemix, the application fails to start. When reviewing the application logs the following excerpt is found:
App instance exited with guid 549fb650-8ded-43aa-b895-f230692be4b0 payload:
{... "index"=>0, "reason"=>"CRASHED", "exit_status"=>255,
"exit_description"=>"out of memory",...}
How can the problem be fixed?

A) It looks like an internal Bluemix problem, open a ticket with IBM Support so they can fix it for you.
B) The application is overloaded with more requests than it can handle. Increase the number of instances either via the command line, in the manifest.yml file or through the Bluemix console.
C) Use the IBM Static Analyzer for Bluemix to run a static code analysis on the entire web application to identify memory leaks.
D) Not enough memory is allocated to the application. Increase the memory either via the command line, in the manifest.yml file, or through the Bluemix console.

5. Based on the Twelve-Factor App methodology, where is the best place to store external configuration credentials in IBM Bluemix PaaS?

A) in the source code
B) in an application database
C) in a user configuration file
D) in the VCAP_SERVICES environment variable

Solutions: