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MB-820 Premium File: 131 Questions & Answers

Last Update: Oct 12, 2026

MB-820 PDF Study Guide: 948 Pages

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Microsoft MB-820 Practice Test 73

Question 720

A tax extension must submit a structured request to an authorized external tax engine and read its response. A targeted trial still reproduces the original gap after the team attempted this change: Use AL HttpClient with an authorized external endpoint and process the HttpResponseMessage. Which repair directly addresses the remaining defect?

  1. Fix credential retrieval and the Authorization header format without exposing secrets in logs
  2. Correct the JSON token traversal and type checks and handle absent optional properties explicitly
  3. Correct the request construction or outbound-call permission and inspect response status/content on failure
  4. Add explicit success-status checks and suitable retry or failure handling for the returned response

Explanation

Correct Answer

C:

Correct the request construction or outbound-call permission and inspect response status/content on failure. This directly addresses the remaining defect for the requirement—A tax extension must submit a structured request to an authorized external tax engine and read its response. It restores the mechanism described here: httpclient enables outbound http exchanges through supported apis rather than direct database or host-level integration.

Incorrect Answers

A:

This correction is for the separate condition: A reporting endpoint refuses an AL integration because it is missing its approved API credential header. It would not directly restore the intended behavior in this situation: A tax extension must submit a structured request to an authorized external tax engine and read its response. Here, correct the request construction or outbound-call permission and inspect response status/content on failure, because httpclient enables outbound http exchanges through supported apis rather than direct database or host-level integration.

B:

This correction is for the separate condition: A tax service returns structured JSON totals and the extension must extract nested values safely. It would not directly restore the intended behavior in this situation: A tax extension must submit a structured request to an authorized external tax engine and read its response. Here, correct the request construction or outbound-call permission and inspect response status/content on failure, because httpclient enables outbound http exchanges through supported apis rather than direct database or host-level integration.

D:

This correction is for the separate condition: An AL HttpClient integration already receives a 400 validation response from the tax service but still records the local order as synchronized. It would not directly restore the intended behavior in this situation: A tax extension must submit a structured request to an authorized external tax engine and read its response. Here, correct the request construction or outbound-call permission and inspect response status/content on failure, because httpclient enables outbound http exchanges through supported apis rather than direct database or host-level integration.

Question 721

An external carrier API requires a bearer token on every outbound request from the Business Central extension. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Attach the required authentication header to the outbound HttpRequestMessage or HttpClient request
  2. Parse the response through the AL JSON object, array and token APIs
  3. Inspect HTTP status and response body before declaring the exchange successful
  4. Set appropriate HttpContent headers and serialize the payload to the service's media-type contract

Explanation

Correct Answer

A:

This targets the concrete requirement—An external carrier API requires a bearer token on every outbound request from the Business Central extension. HTTP authentication headers convey credentials according to the external service's contract rather than as unprotected URL query text. The team can establish success when the authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one.

Incorrect Answers

B:

This choice primarily fits a different requirement: A shipping service returns a JSON array of parcels, but AL code treats it as unstructured text and drops identifiers. There, json parsing preserves typed structured fields and nested arrays rather than relying on fragile string matching. In the current situation, An external carrier API requires a bearer token on every outbound request from the Business Central extension. HTTP authentication headers convey credentials according to the external service's contract rather than as unprotected URL query text. Acceptance requires the authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one.

C:

This choice primarily fits a different requirement: An AL HttpClient integration already exchanges requests and responses with an external supplier, but it treats HTTP 429 or 503 responses as success during peak traffic. There, transport completion does not imply application success; the status code and body determine whether the remote operation succeeded. In the current situation, An external carrier API requires a bearer token on every outbound request from the Business Central extension. HTTP authentication headers convey credentials according to the external service's contract rather than as unprotected URL query text. Acceptance requires the authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one.

D:

This choice primarily fits a different requirement: A partner submits JSON to an endpoint that expects application/json but the server rejects the body as an unknown media type. There, http content headers describe the request body representation separately from general request or authentication headers. In the current situation, An external carrier API requires a bearer token on every outbound request from the Business Central extension. HTTP authentication headers convey credentials according to the external service's contract rather than as unprotected URL query text. Acceptance requires the authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one.

Question 722

An external carrier API requires a bearer token on every outbound request from the Business Central extension. The developer recommends the following change: Attach the required authentication header to the outbound HttpRequestMessage or HttpClient request. Which technical explanation most directly justifies it in this case?

  1. JSON parsing preserves typed structured fields and nested arrays rather than relying on fragile string matching
  2. HTTP authentication headers convey credentials according to the external service's contract rather than as unprotected URL query text
  3. Transport completion does not imply application success; the status code and body determine whether the remote operation succeeded
  4. HTTP content headers describe the request body representation separately from general request or authentication headers

Explanation

Correct Answer

B:

HTTP authentication headers convey credentials according to the external service's contract rather than as unprotected URL query text. It connects the proposed action to the exact failure or requirement—An external carrier API requires a bearer token on every outbound request from the Business Central extension. Confirmation would be the authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one.

Incorrect Answers

A:

That mechanism explains why the alternative action—parse the response through the al json object, array and token apis—helps in another case. It does not justify the proposed fix here; http authentication headers convey credentials according to the external service's contract rather than as unprotected url query text. The distinguishing requirement is: An external carrier API requires a bearer token on every outbound request from the Business Central extension.

C:

That mechanism explains why the alternative action—inspect http status and response body before declaring the exchange successful—helps in another case. It does not justify the proposed fix here; http authentication headers convey credentials according to the external service's contract rather than as unprotected url query text. The distinguishing requirement is: An external carrier API requires a bearer token on every outbound request from the Business Central extension.

D:

That mechanism explains why the alternative action—set appropriate httpcontent headers and serialize the payload to the service's media-type contract—helps in another case. It does not justify the proposed fix here; http authentication headers convey credentials according to the external service's contract rather than as unprotected url query text. The distinguishing requirement is: An external carrier API requires a bearer token on every outbound request from the Business Central extension.

Question 723

An external carrier API requires a bearer token on every outbound request from the Business Central extension. The team implemented a change aligned with this plan: Attach the required authentication header to the outbound HttpRequestMessage or HttpClient request. Which acceptance result specifically verifies that the reported problem is resolved?

  1. A nested sample payload yields the expected parcel IDs or numeric totals without data loss
  2. Simulated 2xx and error responses follow distinct success, retry or compensating paths without false synchronization
  3. The authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one
  4. The remote API accepts the payload and parses the intended JSON fields with no media-type rejection

Explanation

Correct Answer

C:

The authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one. This is stronger than an unrelated health check because the desired design action is attach the required authentication header to the outbound httprequestmessage or httpclient request, and http authentication headers convey credentials according to the external service's contract rather than as unprotected url query text. The local requirement is: An external carrier API requires a bearer token on every outbound request from the Business Central extension.

Incorrect Answers

A:

This would verify parse the response through the al json object, array and token apis, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: An external carrier API requires a bearer token on every outbound request from the Business Central extension. The decisive local proof is the authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one.

B:

This would verify inspect http status and response body before declaring the exchange successful, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: An external carrier API requires a bearer token on every outbound request from the Business Central extension. The decisive local proof is the authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one.

D:

This would verify set appropriate httpcontent headers and serialize the payload to the service's media-type contract, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: An external carrier API requires a bearer token on every outbound request from the Business Central extension. The decisive local proof is the authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one.

Question 724

An external carrier API requires a bearer token on every outbound request from the Business Central extension. A targeted trial still reproduces the original gap after the team attempted this change: Attach the required authentication header to the outbound HttpRequestMessage or HttpClient request. Which repair directly addresses the remaining defect?

  1. Correct the JSON token traversal and type checks and handle absent optional properties explicitly
  2. Add explicit success-status checks and suitable retry or failure handling for the returned response
  3. Correct the content headers and body serialization then replay a representative request
  4. Fix credential retrieval and the Authorization header format without exposing secrets in logs

Explanation

Correct Answer

D:

Fix credential retrieval and the Authorization header format without exposing secrets in logs. This directly addresses the remaining defect for the requirement—An external carrier API requires a bearer token on every outbound request from the Business Central extension. It restores the mechanism described here: http authentication headers convey credentials according to the external service's contract rather than as unprotected url query text.

Incorrect Answers

A:

This correction is for the separate condition: A tax service returns structured JSON totals and the extension must extract nested values safely. It would not directly restore the intended behavior in this situation: An external carrier API requires a bearer token on every outbound request from the Business Central extension. Here, fix credential retrieval and the authorization header format without exposing secrets in logs, because http authentication headers convey credentials according to the external service's contract rather than as unprotected url query text.

B:

This correction is for the separate condition: An AL HttpClient integration already receives a 400 validation response from the tax service but still records the local order as synchronized. It would not directly restore the intended behavior in this situation: An external carrier API requires a bearer token on every outbound request from the Business Central extension. Here, fix credential retrieval and the authorization header format without exposing secrets in logs, because http authentication headers convey credentials according to the external service's contract rather than as unprotected url query text.

C:

This correction is for the separate condition: A warehouse connector posts text data to a service that requires a precise HTTP content type and encoding. It would not directly restore the intended behavior in this situation: An external carrier API requires a bearer token on every outbound request from the Business Central extension. Here, fix credential retrieval and the authorization header format without exposing secrets in logs, because http authentication headers convey credentials according to the external service's contract rather than as unprotected url query text.

Question 725

A reporting endpoint refuses an AL integration because it is missing its approved API credential header. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Parse the response through the AL JSON object, array and token APIs
  2. Attach the required authentication header to the outbound HttpRequestMessage or HttpClient request
  3. Inspect HTTP status and response body before declaring the exchange successful
  4. Set appropriate HttpContent headers and serialize the payload to the service's media-type contract

Explanation

Correct Answer

B:

This targets the concrete requirement—A reporting endpoint refuses an AL integration because it is missing its approved API credential header. HTTP authentication headers convey credentials according to the external service's contract rather than as unprotected URL query text. The team can establish success when the authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one.

Incorrect Answers

A:

This choice primarily fits a different requirement: A shipping service returns a JSON array of parcels, but AL code treats it as unstructured text and drops identifiers. There, json parsing preserves typed structured fields and nested arrays rather than relying on fragile string matching. In the current situation, A reporting endpoint refuses an AL integration because it is missing its approved API credential header. HTTP authentication headers convey credentials according to the external service's contract rather than as unprotected URL query text. Acceptance requires the authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one.

C:

This choice primarily fits a different requirement: An AL HttpClient integration already exchanges requests and responses with an external supplier, but it treats HTTP 429 or 503 responses as success during peak traffic. There, transport completion does not imply application success; the status code and body determine whether the remote operation succeeded. In the current situation, A reporting endpoint refuses an AL integration because it is missing its approved API credential header. HTTP authentication headers convey credentials according to the external service's contract rather than as unprotected URL query text. Acceptance requires the authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one.

D:

This choice primarily fits a different requirement: A partner submits JSON to an endpoint that expects application/json but the server rejects the body as an unknown media type. There, http content headers describe the request body representation separately from general request or authentication headers. In the current situation, A reporting endpoint refuses an AL integration because it is missing its approved API credential header. HTTP authentication headers convey credentials according to the external service's contract rather than as unprotected URL query text. Acceptance requires the authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one.

Question 726

A reporting endpoint refuses an AL integration because it is missing its approved API credential header. The developer recommends the following change: Attach the required authentication header to the outbound HttpRequestMessage or HttpClient request. Which technical explanation most directly justifies it in this case?

  1. JSON parsing preserves typed structured fields and nested arrays rather than relying on fragile string matching
  2. Transport completion does not imply application success; the status code and body determine whether the remote operation succeeded
  3. HTTP authentication headers convey credentials according to the external service's contract rather than as unprotected URL query text
  4. HTTP content headers describe the request body representation separately from general request or authentication headers

Explanation

Correct Answer

C:

HTTP authentication headers convey credentials according to the external service's contract rather than as unprotected URL query text. It connects the proposed action to the exact failure or requirement—A reporting endpoint refuses an AL integration because it is missing its approved API credential header. Confirmation would be the authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one.

Incorrect Answers

A:

That mechanism explains why the alternative action—parse the response through the al json object, array and token apis—helps in another case. It does not justify the proposed fix here; http authentication headers convey credentials according to the external service's contract rather than as unprotected url query text. The distinguishing requirement is: A reporting endpoint refuses an AL integration because it is missing its approved API credential header.

B:

That mechanism explains why the alternative action—inspect http status and response body before declaring the exchange successful—helps in another case. It does not justify the proposed fix here; http authentication headers convey credentials according to the external service's contract rather than as unprotected url query text. The distinguishing requirement is: A reporting endpoint refuses an AL integration because it is missing its approved API credential header.

D:

That mechanism explains why the alternative action—set appropriate httpcontent headers and serialize the payload to the service's media-type contract—helps in another case. It does not justify the proposed fix here; http authentication headers convey credentials according to the external service's contract rather than as unprotected url query text. The distinguishing requirement is: A reporting endpoint refuses an AL integration because it is missing its approved API credential header.

Question 727

A reporting endpoint refuses an AL integration because it is missing its approved API credential header. The team implemented a change aligned with this plan: Attach the required authentication header to the outbound HttpRequestMessage or HttpClient request. Which acceptance result specifically verifies that the reported problem is resolved?

  1. A nested sample payload yields the expected parcel IDs or numeric totals without data loss
  2. Simulated 2xx and error responses follow distinct success, retry or compensating paths without false synchronization
  3. The remote API accepts the payload and parses the intended JSON fields with no media-type rejection
  4. The authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one

Explanation

Correct Answer

D:

The authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one. This is stronger than an unrelated health check because the desired design action is attach the required authentication header to the outbound httprequestmessage or httpclient request, and http authentication headers convey credentials according to the external service's contract rather than as unprotected url query text. The local requirement is: A reporting endpoint refuses an AL integration because it is missing its approved API credential header.

Incorrect Answers

A:

This would verify parse the response through the al json object, array and token apis, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A reporting endpoint refuses an AL integration because it is missing its approved API credential header. The decisive local proof is the authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one.

B:

This would verify inspect http status and response body before declaring the exchange successful, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A reporting endpoint refuses an AL integration because it is missing its approved API credential header. The decisive local proof is the authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one.

C:

This would verify set appropriate httpcontent headers and serialize the payload to the service's media-type contract, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A reporting endpoint refuses an AL integration because it is missing its approved API credential header. The decisive local proof is the authorized endpoint accepts the call with a valid credential and rejects a missing or invalid one.

Question 728

A reporting endpoint refuses an AL integration because it is missing its approved API credential header. A targeted trial still reproduces the original gap after the team attempted this change: Attach the required authentication header to the outbound HttpRequestMessage or HttpClient request. Which repair directly addresses the remaining defect?

  1. Fix credential retrieval and the Authorization header format without exposing secrets in logs
  2. Correct the JSON token traversal and type checks and handle absent optional properties explicitly
  3. Add explicit success-status checks and suitable retry or failure handling for the returned response
  4. Correct the content headers and body serialization then replay a representative request

Explanation

Correct Answer

A:

Fix credential retrieval and the Authorization header format without exposing secrets in logs. This directly addresses the remaining defect for the requirement—A reporting endpoint refuses an AL integration because it is missing its approved API credential header. It restores the mechanism described here: http authentication headers convey credentials according to the external service's contract rather than as unprotected url query text.

Incorrect Answers

B:

This correction is for the separate condition: A tax service returns structured JSON totals and the extension must extract nested values safely. It would not directly restore the intended behavior in this situation: A reporting endpoint refuses an AL integration because it is missing its approved API credential header. Here, fix credential retrieval and the authorization header format without exposing secrets in logs, because http authentication headers convey credentials according to the external service's contract rather than as unprotected url query text.

C:

This correction is for the separate condition: An AL HttpClient integration already receives a 400 validation response from the tax service but still records the local order as synchronized. It would not directly restore the intended behavior in this situation: A reporting endpoint refuses an AL integration because it is missing its approved API credential header. Here, fix credential retrieval and the authorization header format without exposing secrets in logs, because http authentication headers convey credentials according to the external service's contract rather than as unprotected url query text.

D:

This correction is for the separate condition: A warehouse connector posts text data to a service that requires a precise HTTP content type and encoding. It would not directly restore the intended behavior in this situation: A reporting endpoint refuses an AL integration because it is missing its approved API credential header. Here, fix credential retrieval and the authorization header format without exposing secrets in logs, because http authentication headers convey credentials according to the external service's contract rather than as unprotected url query text.

Question 729

A shipping service returns a JSON array of parcels, but AL code treats it as unstructured text and drops identifiers. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Inspect HTTP status and response body before declaring the exchange successful
  2. Set appropriate HttpContent headers and serialize the payload to the service's media-type contract
  3. Parse the response through the AL JSON object, array and token APIs
  4. Keep sensitive credentials in secured configuration and scrub diagnostics around outbound HTTP

Explanation

Correct Answer

C:

This targets the concrete requirement—A shipping service returns a JSON array of parcels, but AL code treats it as unstructured text and drops identifiers. JSON parsing preserves typed structured fields and nested arrays rather than relying on fragile string matching. The team can establish success when a nested sample payload yields the expected parcel ids or numeric totals without data loss.

Incorrect Answers

A:

This choice primarily fits a different requirement: An AL HttpClient integration already exchanges requests and responses with an external supplier, but it treats HTTP 429 or 503 responses as success during peak traffic. There, transport completion does not imply application success; the status code and body determine whether the remote operation succeeded. In the current situation, A shipping service returns a JSON array of parcels, but AL code treats it as unstructured text and drops identifiers. JSON parsing preserves typed structured fields and nested arrays rather than relying on fragile string matching. Acceptance requires a nested sample payload yields the expected parcel ids or numeric totals without data loss.

B:

This choice primarily fits a different requirement: A partner submits JSON to an endpoint that expects application/json but the server rejects the body as an unknown media type. There, http content headers describe the request body representation separately from general request or authentication headers. In the current situation, A shipping service returns a JSON array of parcels, but AL code treats it as unstructured text and drops identifiers. JSON parsing preserves typed structured fields and nested arrays rather than relying on fragile string matching. Acceptance requires a nested sample payload yields the expected parcel ids or numeric totals without data loss.

D:

This choice primarily fits a different requirement: A transaction uses an external REST call and must not expose customer secrets in URLs or diagnostic telemetry. There, secure integration design limits credential exposure in query strings, published source and support traces. In the current situation, A shipping service returns a JSON array of parcels, but AL code treats it as unstructured text and drops identifiers. JSON parsing preserves typed structured fields and nested arrays rather than relying on fragile string matching. Acceptance requires a nested sample payload yields the expected parcel ids or numeric totals without data loss.

Question 730

A shipping service returns a JSON array of parcels, but AL code treats it as unstructured text and drops identifiers. The developer recommends the following change: Parse the response through the AL JSON object, array and token APIs. Which technical explanation most directly justifies it in this case?

  1. Transport completion does not imply application success; the status code and body determine whether the remote operation succeeded
  2. HTTP content headers describe the request body representation separately from general request or authentication headers
  3. Secure integration design limits credential exposure in query strings, published source and support traces
  4. JSON parsing preserves typed structured fields and nested arrays rather than relying on fragile string matching

Explanation

Correct Answer

D:

JSON parsing preserves typed structured fields and nested arrays rather than relying on fragile string matching. It connects the proposed action to the exact failure or requirement—A shipping service returns a JSON array of parcels, but AL code treats it as unstructured text and drops identifiers. Confirmation would be a nested sample payload yields the expected parcel ids or numeric totals without data loss.

Incorrect Answers

A:

That mechanism explains why the alternative action—inspect http status and response body before declaring the exchange successful—helps in another case. It does not justify the proposed fix here; json parsing preserves typed structured fields and nested arrays rather than relying on fragile string matching. The distinguishing requirement is: A shipping service returns a JSON array of parcels, but AL code treats it as unstructured text and drops identifiers.

B:

That mechanism explains why the alternative action—set appropriate httpcontent headers and serialize the payload to the service's media-type contract—helps in another case. It does not justify the proposed fix here; json parsing preserves typed structured fields and nested arrays rather than relying on fragile string matching. The distinguishing requirement is: A shipping service returns a JSON array of parcels, but AL code treats it as unstructured text and drops identifiers.

C:

That mechanism explains why the alternative action—keep sensitive credentials in secured configuration and scrub diagnostics around outbound http—helps in another case. It does not justify the proposed fix here; json parsing preserves typed structured fields and nested arrays rather than relying on fragile string matching. The distinguishing requirement is: A shipping service returns a JSON array of parcels, but AL code treats it as unstructured text and drops identifiers.


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