MCIA-LEVEL-1 Online Practice Questions and Answers

Correct Answer: C

Explanation:

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Setting a transaction timeout for the Bitronix transaction manager Set the transaction timeout either

In wrapper.conf

In CloudHub in the Properties tab of the Mule application deployment The default is 60 secs. It is defined as

mule.bitronix.transactiontimeout = 120

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This property defines the timeout for each transaction created for this manager. If the transaction has not terminated before the timeout expires it will be automatically rolled back.

--------------------------------------------------------------------------------------------------------------------- Additional Info around Transaction Management:

Bitronix is available as the XA transaction manager for Mule applications To use Bitronix, declare it as a global configuration element in the Mule application

Each Mule runtime can have only one instance of a Bitronix transaction manager, which is shared by all Mule applications

For customer-hosted deployments, define the XA transaction manager in a Mule domain ?Then share this global element among all Mule applications in the Mule runtime

Correct Answer: B

Correct Answer: D

Correct Answer: C

Explanation: Connected Apps The Connected Apps feature provides a framework that enables an external application to integrate with Anypoint Platform using APIs through OAuth 2.0 and OpenID Connect. Connected apps help users delegate their access without sharing sensitive credentials or giving full control of their accounts to third parties. Actions taken by connected apps are audited, and users can also revoke access at any time. Note that some products do not currently include client IDs in this release of the Connected Apps feature. The Connected Apps feature enables you to use secure authentication protocols and control an app's access to user data. Additionally, end users can authorize the app to access their Anypoint Platform data.

Mule Ref Doc : https://docs.mulesoft.com/access-management/connected-apps-overview

Correct Answer: B

Correct Answer: A

Correct Answer: B

Explanation: Correct answer is Consistency as XA transactions are implemented to achieve this. XA transactions are added in the implementation to achieve goal of ACID properties. In the context of transaction processing, the acronym ACID refers to the four key properties of a transaction: atomicity, consistency, isolation, and durability. Atomicity : All changes to data are performed as if they are a single operation. That is, all the changes are performed, or none of them are. For example, in an application that transfers funds from one account to another, the atomicity property ensures that, if a debit is made successfully from one account, the corresponding credit is made to the other account. Consistency : Data is in a consistent state when a transaction starts and when it ends.For example, in an application that transfers funds from one account to another, the consistency property ensures that the total value of funds in both the accounts is the same at the start and end of each transaction. Isolation : The intermediate state of a transaction is invisible to other transactions. As a result, transactions that run concurrently appear to be serialized. For example, in an application that transfers funds from one account to another, the isolation property ensures that another transaction sees the transferred funds in one account or the other, but not in both, nor in neither. Durability : After a transaction successfully completes, changes to data persist and are not undone, even in the event of a system failure. For example, in an application that transfers funds from one account to another, the durability property ensures that the changes made to each account will not be reversed. MuleSoft reference: https://docs.mulesoft.com/mule-runtime/4.3/xa-transactions

Correct Answer: B

Reference: https://docs.mulesoft.com/runtime-manager/secure-application-properties

Correct Answer: D

Explanation: Correct choice is: "The external API reported an error with the HTTP request that was received from the outbound HTTP Request operation of the Mule application" Understanding HTTP 4XX Client Error Response Codes : A 4XX Error is an error that arises in cases where there is a problem with the user's request, and not with the server. Such cases usually arise when a user's access to a webpage is restricted, the user misspells the URL, or when a webpage is nonexistent or removed from the public's view. In short, it is an error that occurs because of a mismatch between what a user is trying to access, and its availability to the user -- either because the user does not have the right to access it, or because what the user is trying to access simply does not exist. Some of the examples of 4XX errors are 400 Bad Request The server could not understand the request due to invalid syntax. 401 Unauthorized Although the HTTP standard specifies "unauthorized", semantically this response means "unauthenticated". That is, the client must authenticate itself to get the requested response. 403 Forbidden The client does not have access rights to the content; that is, it is unauthorized, so the server is refusing to give the requested resource. Unlike 401, the client's identity is known to the server. 404 Not Found The server can not find the requested resource. In the browser, this means the URL is not recognized. In an API, this can also mean that the endpoint is valid but the resource itself does not exist. Servers may also send this response instead of 403 to hide the existence of a resource from an unauthorized client. This response code is probably the most famous one due to its frequent occurrence on the web. 405 Method Not Allowed The request method is known by the server but has been disabled and cannot be used. For example, an API may forbid DELETE-ing a resource. The two mandatory methods, GET and HEAD, must never be disabled and should not return this error code. 406 Not Acceptable This response is sent when the web server, after performing server-driven content negotiation, doesn't find any content that conforms to the criteria given by the user agent. The external API reported that the API implementation has moved to a different external endpoint cannot be the correct answer as in this situation 301 Moved Permanently The URL of the requested resource has been changed permanently. The new URL is given in the response. ------------------------------ ----------------------------------------------------------------------------------------------------------------- In Lay man's term the scenario would be: API CLIENT --> MuleSoft API - HTTP request "Hey, API.. process this" --> External API API CLIENT

Correct Answer: D

Explanation:

Mule applications are deployed in CloudHub workers and each worker is assigned with a dedicated IP ?For zero downtime deployment, each worker in CloudHub needs additional IP addresses ?A few IPs in a VPC are reserved for

infrastructure (generally 2 IPs) ?The IP addresses are usually in a private range with a subnet block specifier, such as 10.0.0.1/24 ?The smallest CIDR network subnet block you can assign for your VPC is /24 (256 IP addresses) (60*3 env * 2

worker per application ) + 50% of (total) for zero downtime = 540 In this case correct answer is 10.0.0.0/22 as this provided 1024 IP's .

Other IP's are insufficient.