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Q21. In a hierarchical organization of related work items in the Track and Plan feature of IBM Bluemix DevOps Services, which type of work item would be at the top?
A. Epic
B. Task
C. Story
D. Detect
Answer: C
Q22. What are the two key benefits of Cloudant Sync? (Select two.)
A. Sensitive data is encrypted by default before replication.
B. Replication is extremely fast because it is limited to documents less than2KB in size.
C. The distributed database architecture is more scalable thana single central database.
D. It enables mobile device apps accessing the database to operate without a network connection.
E. It significantly reduces the amount of storage needed once all participating databases are in sync.
Answer: A,C
Q23. Based on the Twelve-Factor App methodology, how should developers share common code between two Node.js applications in IBM Bluemix PaaS?
A. duplicate the common code in each application repository
B. use only one repository for both applications and the common code
C. use one repository for both applications and another repository for the common code
D. create a npm package for the common code and add the dependency to it for both applications
Answer: B
Q24. Which statement is correct regarding the capabilities available on the Run Query tab shown in the image of the SQL DatabaseServiceweb console to manage instances in IBM Bluemix PaaS?
A. OnlySQL SELECTstatements are allowed.
B. The queries can only be generated through a wizard.
C. Queries can use JSON documents as SQL command arguments.
D. A maximum of 500 rows of data can be returned from each query.
Answer: C
Q25. What are three types of work items available in the IBM Bluemix DevOps Services Track & Plan feature?(Select three.)
A. PMR
B. Task
C. Story
D. Sprint
E. Defect
F. Test Plan
Answer: B,C,E
Explanation:
. Bluemix DevOps Services - Track & Plan supports typical activities conducted during agile projects, such as backlog management, sprint planning, and daily scrums
. Understand work items in Track & Plan like epic, story, task, and defect
On an agile project, features to implement are captured in a product backlog, then the team identifies the work for the next Sprint in the Sprint Backlog.
Q26. What is the output of thecf appscommand?
A. a list of all the applications and services for the developer’s organization
B. a list of services bound to each application for the developer’s organization
C. a list of all the running applications on IBM Bluemix PaaS with application owner ID
D. a list of all the applications in the developer’s space with the name and resource utilization
Answer: D
Q27. A developer’s application is falling to work correctly in IBM Bluemix PaaS. The developer is unsure if the problem is caused by a bad environment value or a bug in the code. How should they proceed?
A. Rebind the service associated with VCAP_SERVICES.
B. Usecf env <app_name>to get all the environment variables forthe application.
C. Delete the service associated with VCAP_SERVICES and recreate it without rebinding.
D. Usecf set-env <app_name>to set all environment variables to null for the application.
Answer: A
Q28. Applications A and B are configured to use IBM MQ Light for Bluemix messaging capabilities. Application A publishes messages to a topic. Application B subscribes to the same topic in order to receive the messages published by Application A. What occurs when Application A publishes the message after Application B goes down?
A. Destination stores the message and it will be received if Application B comes back up before the destination time-to-live expires.
B. Application A receives a notification from the destination that Application B is down.
C. Topic stores the message forever, and the message will be received by Application B after it comes back up.
D. Destination stores the copy of the message for one hour. If Application B does not come back up within one hour the message will be lost.
Answer: A
Explanation:
MQ Light messaging provides two models for delivery assurance, at most once, and at least once. The first is appropriate when occasional loss of data caused by a communication disruption is acceptable, and the second is required when there can be no loss of data. When using at least once, duplicate messages may appear around communication disruptions and they should to be programmatically discarded. MQ Light buffers messages based upon message and destination time-to-live. When an application subscribes to a topic it may specify a destination time-to-live, which will cause MQ Light to store messages at the destination in the event of a receiving application crash. After the destination time-to-live exipres, MQ Light will discard all held messages and stops storing new messages.