Download IBM.C5050-384.PracticeTest.2019-04-26.28q.tqb
| Vendor: | IBM |
| Exam Code: | C5050-384 |
| Exam Name: | IBM Cloud Platform Application Development v2 |
| Date: | Apr 26, 2019 |
| File Size: | 132 KB |
Demo Questions
Question 1
What are two examples of serverless computing frameworks?
(Select two.)
- AWS EC2
- OpenWhisk
- AWS Blueshift
- Azure Automation
- Google Cloud Functions
Correct answer: BE
Explanation:
The IBM OpenWhisk serverless architecture accelerates development as a set of small, distinct, and independent actions. By abstracting away infrastructure, OpenWhisk frees members of small teams to rapidly work on different pieces of code simultaneously, keeping the overall focus on creating user experiences customers want. Google Cloud Functions Beta is a serverless environment to build and connect cloud services. Incorrect Answers:A, C: AWS Lambda is serverless computing framework, but AWS EC2 and AWS Blueshift are not.Amazon Elastic Compute Cloud (Amazon EC2) is a web service that provides secure, resizable compute capacity in the cloud. It is designed to make web-scale cloud computing easier for developers. Amazon EC2’s simple web service interface allows you to obtain and configure capacity with minimal friction. It provides you with complete control of your computing resources and lets you run on Amazon’s proven computing environment. AWS Blueshift is a standalone service written in Clojure (a dialect of Lisp that targets the JVM) that is expected to be deployed on a server. It is configured to watch an S3 bucket; when it detects new data files and a corresponding Blueshift manifest it will perform an upsert transaction for all the files with the additional benefit of being a single import for a large number of files. References:https://www.ibm.com/cloud-computing/bluemix/openwhiskhttps://cloud.google.com/functions/ The IBM OpenWhisk serverless architecture accelerates development as a set of small, distinct, and independent actions. By abstracting away infrastructure, OpenWhisk frees members of small teams to rapidly work on different pieces of code simultaneously, keeping the overall focus on creating user experiences customers want.
Google Cloud Functions Beta is a serverless environment to build and connect cloud services.
Incorrect Answers:
A, C: AWS Lambda is serverless computing framework, but AWS EC2 and AWS Blueshift are not.
Amazon Elastic Compute Cloud (Amazon EC2) is a web service that provides secure, resizable compute capacity in the cloud. It is designed to make web-scale cloud computing easier for developers.
Amazon EC2’s simple web service interface allows you to obtain and configure capacity with minimal friction. It provides you with complete control of your computing resources and lets you run on Amazon’s proven computing environment.
AWS Blueshift is a standalone service written in Clojure (a dialect of Lisp that targets the JVM) that is expected to be deployed on a server. It is configured to watch an S3 bucket; when it detects new data files and a corresponding Blueshift manifest it will perform an upsert transaction for all the files with the additional benefit of being a single import for a large number of files.
References:
https://www.ibm.com/cloud-computing/bluemix/openwhisk
https://cloud.google.com/functions/
Question 2
Which two fields are required in a Certificate Signing Request (CSR)?
(Select two.)
- Encryption key
- Organization name
- Certificate Trust store
- Certificate Authority (Issuer Name)
- Common name (fully qualified domain name)
Correct answer: BE
Explanation:
The required fields of a CSR are Common Name (URL), Country, City/Locality, State /Province, Organization Mae, Organization Unit, and Legacy ID. References: https://knowledge.rapidssl.com/support/ssl-certificate-support/index?page=content&actp=CROSSLINK&id=SO16317 The required fields of a CSR are Common Name (URL), Country, City/Locality, State /Province, Organization Mae, Organization Unit, and Legacy ID.
References: https://knowledge.rapidssl.com/support/ssl-certificate-support/index?page=content&actp=CROSSLINK&id=SO16317
Question 3
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?
- It looks like an internal Bluemix problem, open a ticket with IBM Support so they can fix it for you.
- Use the IBM Static Analyzer for Bluemix to run a static code analysis on the entire web application to identify memory leaks.
- 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.
- 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.
Correct answer: C
Explanation:
As the application fails to start the most likely cause of the problem is that the application does not have enough memory. Note: Receiving an OutOfMemoryError normally means one of two things:1.You heap size is not large enough for the memory requirement of the application. 2.You have a memory leak The quickest thing to try would be to increase the memory allowance for your application, which will also increase the Java heap size for you. You can do this using a "memory" entry in the manifest.yml. For the second, you really need to generate a heapdump so that you can analyse the problem using Memory Analyzer. References: https://developer.ibm.com/answers/questions/29036/out-of-memory-error-on-bluemix-app.html As the application fails to start the most likely cause of the problem is that the application does not have enough memory.
Note: Receiving an OutOfMemoryError normally means one of two things:
1.You heap size is not large enough for the memory requirement of the application.
2.You have a memory leak
The quickest thing to try would be to increase the memory allowance for your application, which will also increase the Java heap size for you. You can do this using a "memory" entry in the manifest.yml.
For the second, you really need to generate a heapdump so that you can analyse the problem using Memory Analyzer.
References: https://developer.ibm.com/answers/questions/29036/out-of-memory-error-on-bluemix-app.html
