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DevNet Associate (DEVASC) 200-901 Practice Test 7

Question 60

The initial implementation fails or does not meet the expected behavior. A regulated switch-configuration migration has fixed contractual requirements and formal sequential design, implementation and acceptance approvals. Which investigation should be prioritized to diagnose the problem?

  1. Inspect branch tips, pull requests, conflict resolution and resulting history.
  2. Inspect namespace declarations and XPath namespace bindings against the returned XML tree.
  3. Capture outbound Content-Type and body bytes, and compare them against the endpoint example.
  4. Inspect baseline requirements, stage-gate evidence and approved change requests.

Explanation

Correct Answer

D:

Inspect baseline requirements, stage-gate evidence and approved change requests. These are the relevant initial evidence checks for Waterfall for a tightly approved migration. Intended action: Use a gated sequential plan with traceable signoffs where change control is mandatory. Expected success condition: Each approved phase has signed requirements, design, deployment and final verification artifacts.

Incorrect Answers

A:

Inspect branch tips, pull requests, conflict resolution and resulting history. This investigation primarily applies to Branch isolation for competing fixes, not the current Waterfall for a tightly approved migration problem. Prioritize: Inspect baseline requirements, stage-gate evidence and approved change requests.

B:

Inspect namespace declarations and XPath namespace bindings against the returned XML tree. This investigation primarily applies to XML namespaces in network configuration, not the current Waterfall for a tightly approved migration problem. Prioritize: Inspect baseline requirements, stage-gate evidence and approved change requests.

C:

Capture outbound Content-Type and body bytes, and compare them against the endpoint example. This investigation primarily applies to YAML config versus JSON API body, not the current Waterfall for a tightly approved migration problem. Prioritize: Inspect baseline requirements, stage-gate evidence and approved change requests.

Question 61

A Cisco network automation team has this requirement: A small automation team spends more time copying tickets between tools than deploying approved fixes; work sits idle between reviews. Which design or implementation action best addresses it?

  1. Manually reconcile the conflicting code, remove markers, run tests and commit the resolved merge.
  2. Map the value stream and remove non-value-adding handoffs while retaining mandatory control gates.
  3. Use yaml.safe_load with schema validation for the untrusted configuration document.
  4. Add a persistent unit test asserting correct handling of an empty list alongside normal nonempty fixtures.

Explanation

Correct Answer

B:

Map the value stream and remove non-value-adding handoffs while retaining mandatory control gates. Technical reason: Lean improvement targets waste, flow and delivery efficiency. Verify by: Measured lead time decreases without bypassing security review or deployment verification. Deployment qualification: Removing a mandatory audit step in the name of speed would be an invalid optimization.

Incorrect Answers

A:

Manually reconcile the conflicting code, remove markers, run tests and commit the resolved merge. This instead targets the different case Resolve a merge conflict rather than force-push. The described Lean removal of redundant handoffs requirement specifically calls for Map the value stream and remove non-value-adding handoffs while retaining mandatory control gates.

C:

Use yaml.safe_load with schema validation for the untrusted configuration document. This instead targets the different case Safely parse YAML without object construction. The described Lean removal of redundant handoffs requirement specifically calls for Map the value stream and remove non-value-adding handoffs while retaining mandatory control gates.

D:

Add a persistent unit test asserting correct handling of an empty list alongside normal nonempty fixtures. This instead targets the different case Regression test after parser bug fix. The described Lean removal of redundant handoffs requirement specifically calls for Map the value stream and remove non-value-adding handoffs while retaining mandatory control gates.

Question 62

After deployment, an engineer must prove the proposed solution works. A small automation team spends more time copying tickets between tools than deploying approved fixes; work sits idle between reviews. Which observed result is the most direct acceptance evidence?

  1. Two controller clients operate independently without mixing bearer tokens or base URLs.
  2. Measured lead time decreases without bypassing security review or deployment verification.
  3. The parser obtains Gi1 and integer 1000 from the fixture without searching raw text.
  4. The playbook configuration is readable as YAML while the outgoing request passes the service's JSON schema check.

Explanation

Correct Answer

B:

Measured lead time decreases without bypassing security review or deployment verification. Recommended implementation: Map the value stream and remove non-value-adding handoffs while retaining mandatory control gates. Why the observation matters: Lean improvement targets waste, flow and delivery efficiency.

Incorrect Answers

A:

Two controller clients operate independently without mixing bearer tokens or base URLs. That observation could confirm Separate classes from modules for network clients, not the current Lean removal of redundant handoffs case. For this case, the decisive observation is: Measured lead time decreases without bypassing security review or deployment verification.

C:

The parser obtains Gi1 and integer 1000 from the fixture without searching raw text. That observation could confirm Distinguish XML attribute from element text, not the current Lean removal of redundant handoffs case. For this case, the decisive observation is: Measured lead time decreases without bypassing security review or deployment verification.

D:

The playbook configuration is readable as YAML while the outgoing request passes the service's JSON schema check. That observation could confirm YAML config versus JSON API body, not the current Lean removal of redundant handoffs case. For this case, the decisive observation is: Measured lead time decreases without bypassing security review or deployment verification.

Question 63

A developer is explaining the underlying technical behavior. A small automation team spends more time copying tickets between tools than deploying approved fixes; work sits idle between reviews. Which principle is most relevant to this case?

  1. Function decomposition reduces coupling and makes responsibilities independently testable.
  2. Lean improvement targets waste, flow and delivery efficiency.
  3. Nested JSON arrays become Python lists containing dictionary objects.
  4. YAML can improve human-edited configuration, but request serialization must follow the HTTP API contract.

Explanation

Correct Answer

B:

Lean improvement targets waste, flow and delivery efficiency. This mechanism explains Lean removal of redundant handoffs. Action: Map the value stream and remove non-value-adding handoffs while retaining mandatory control gates. Expected confirmation: Measured lead time decreases without bypassing security review or deployment verification.

Incorrect Answers

A:

Function decomposition reduces coupling and makes responsibilities independently testable. This relates to Single responsibility for inventory processing. In the current Lean removal of redundant handoffs case the operative principle is: Lean improvement targets waste, flow and delivery efficiency.

C:

Nested JSON arrays become Python lists containing dictionary objects. This relates to Parse nested device lists into Python. In the current Lean removal of redundant handoffs case the operative principle is: Lean improvement targets waste, flow and delivery efficiency.

D:

YAML can improve human-edited configuration, but request serialization must follow the HTTP API contract. This relates to YAML config versus JSON API body. In the current Lean removal of redundant handoffs case the operative principle is: Lean improvement targets waste, flow and delivery efficiency.

Question 64

A team does not apply the necessary control or correction. A small automation team spends more time copying tickets between tools than deploying approved fixes; work sits idle between reviews. Which resulting failure or risk is most directly relevant?

  1. Speeding coding alone leaves ticket transfer queues and idle wait time unchanged.
  2. Untracked local overwrites eliminate easy diff and rollback provenance.
  3. Treating an attribute as a child element silently loses required inventory identifiers.
  4. Force-pushing one branch can discard the other fix or damage shared history.

Explanation

Correct Answer

A:

Speeding coding alone leaves ticket transfer queues and idle wait time unchanged. This is the direct exposure for Lean removal of redundant handoffs. Mitigate with: Map the value stream and remove non-value-adding handoffs while retaining mandatory control gates. Check success by: Measured lead time decreases without bypassing security review or deployment verification.

Incorrect Answers

B:

Untracked local overwrites eliminate easy diff and rollback provenance. This risk occurs in the different Git history for configuration rollback situation. For the given Lean removal of redundant handoffs requirement, the directly relevant risk is: Speeding coding alone leaves ticket transfer queues and idle wait time unchanged.

C:

Treating an attribute as a child element silently loses required inventory identifiers. This risk occurs in the different Distinguish XML attribute from element text situation. For the given Lean removal of redundant handoffs requirement, the directly relevant risk is: Speeding coding alone leaves ticket transfer queues and idle wait time unchanged.

D:

Force-pushing one branch can discard the other fix or damage shared history. This risk occurs in the different Resolve a merge conflict rather than force-push situation. For the given Lean removal of redundant handoffs requirement, the directly relevant risk is: Speeding coding alone leaves ticket transfer queues and idle wait time unchanged.

Question 65

The initial implementation fails or does not meet the expected behavior. A small automation team spends more time copying tickets between tools than deploying approved fixes; work sits idle between reviews. Which investigation should be prioritized to diagnose the problem?

  1. Inspect git status and git diff --cached before the commit.
  2. Inspect workflow timestamps, queue residence times and repeated manual transitions.
  3. Inspect namespace declarations and XPath namespace bindings against the returned XML tree.
  4. Capture outbound Content-Type and body bytes, and compare them against the endpoint example.

Explanation

Correct Answer

B:

Inspect workflow timestamps, queue residence times and repeated manual transitions. These are the relevant initial evidence checks for Lean removal of redundant handoffs. Intended action: Map the value stream and remove non-value-adding handoffs while retaining mandatory control gates. Expected success condition: Measured lead time decreases without bypassing security review or deployment verification.

Incorrect Answers

A:

Inspect git status and git diff --cached before the commit. This investigation primarily applies to Stage only the intended file before commit, not the current Lean removal of redundant handoffs problem. Prioritize: Inspect workflow timestamps, queue residence times and repeated manual transitions.

C:

Inspect namespace declarations and XPath namespace bindings against the returned XML tree. This investigation primarily applies to XML namespaces in network configuration, not the current Lean removal of redundant handoffs problem. Prioritize: Inspect workflow timestamps, queue residence times and repeated manual transitions.

D:

Capture outbound Content-Type and body bytes, and compare them against the endpoint example. This investigation primarily applies to YAML config versus JSON API body, not the current Lean removal of redundant handoffs problem. Prioritize: Inspect workflow timestamps, queue residence times and repeated manual transitions.

Question 66

A Cisco network automation team has this requirement: Four scripts contain nearly identical request retry blocks and one has a stale backoff rule after an API rate-limit change. Which design or implementation action best addresses it?

  1. Plan short iterations with a prioritized backlog and working increments reviewed by users.
  2. Manually reconcile the conflicting code, remove markers, run tests and commit the resolved merge.
  3. Use an XML parser with explicit namespace mappings to select the required interface elements.
  4. Centralize retry handling in a reusable, tested function parameterized by status and retry bounds.

Explanation

Correct Answer

D:

Centralize retry handling in a reusable, tested function parameterized by status and retry bounds. Technical reason: Functions encapsulate repeated behavior behind a single documented interface. Verify by: All four callers use the same bounded retry behavior when a simulated 429 occurs. Deployment qualification: A helper must still honor each endpoint's retry safety and idempotency semantics.

Incorrect Answers

A:

Plan short iterations with a prioritized backlog and working increments reviewed by users. This instead targets the different case Agile iteration for uncertain feature requirements. The described Extract repeated API retry logic into a function requirement specifically calls for Centralize retry handling in a reusable, tested function parameterized by status and retry bounds.

B:

Manually reconcile the conflicting code, remove markers, run tests and commit the resolved merge. This instead targets the different case Resolve a merge conflict rather than force-push. The described Extract repeated API retry logic into a function requirement specifically calls for Centralize retry handling in a reusable, tested function parameterized by status and retry bounds.

C:

Use an XML parser with explicit namespace mappings to select the required interface elements. This instead targets the different case XML namespaces in network configuration. The described Extract repeated API retry logic into a function requirement specifically calls for Centralize retry handling in a reusable, tested function parameterized by status and retry bounds.

Question 67

After deployment, an engineer must prove the proposed solution works. Four scripts contain nearly identical request retry blocks and one has a stale backoff rule after an API rate-limit change. Which observed result is the most direct acceptance evidence?

  1. All four callers use the same bounded retry behavior when a simulated 429 occurs.
  2. A sample reply yields precisely the expected interface names even when namespace prefixes change.
  3. Each sprint demonstrates a working subset and incorporates ranked stakeholder feedback.
  4. Measured lead time decreases without bypassing security review or deployment verification.

Explanation

Correct Answer

A:

All four callers use the same bounded retry behavior when a simulated 429 occurs. Recommended implementation: Centralize retry handling in a reusable, tested function parameterized by status and retry bounds. Why the observation matters: Functions encapsulate repeated behavior behind a single documented interface.

Incorrect Answers

B:

A sample reply yields precisely the expected interface names even when namespace prefixes change. That observation could confirm XML namespaces in network configuration, not the current Extract repeated API retry logic into a function case. For this case, the decisive observation is: All four callers use the same bounded retry behavior when a simulated 429 occurs.

C:

Each sprint demonstrates a working subset and incorporates ranked stakeholder feedback. That observation could confirm Agile iteration for uncertain feature requirements, not the current Extract repeated API retry logic into a function case. For this case, the decisive observation is: All four callers use the same bounded retry behavior when a simulated 429 occurs.

D:

Measured lead time decreases without bypassing security review or deployment verification. That observation could confirm Lean removal of redundant handoffs, not the current Extract repeated API retry logic into a function case. For this case, the decisive observation is: All four callers use the same bounded retry behavior when a simulated 429 occurs.

Question 68

A developer is explaining the underlying technical behavior. Four scripts contain nearly identical request retry blocks and one has a stale backoff rule after an API rate-limit change. Which principle is most relevant to this case?

  1. MVC separates state/data, interaction coordination and user-interface rendering.
  2. Functions encapsulate repeated behavior behind a single documented interface.
  3. YAML can improve human-edited configuration, but request serialization must follow the HTTP API contract.
  4. JSON natively expresses objects and arrays while XML represents data as elements and attributes.

Explanation

Correct Answer

B:

Functions encapsulate repeated behavior behind a single documented interface. This mechanism explains Extract repeated API retry logic into a function. Action: Centralize retry handling in a reusable, tested function parameterized by status and retry bounds. Expected confirmation: All four callers use the same bounded retry behavior when a simulated 429 occurs.

Incorrect Answers

A:

MVC separates state/data, interaction coordination and user-interface rendering. This relates to MVC isolates controller logic from UI. In the current Extract repeated API retry logic into a function case the operative principle is: Functions encapsulate repeated behavior behind a single documented interface.

C:

YAML can improve human-edited configuration, but request serialization must follow the HTTP API contract. This relates to YAML config versus JSON API body. In the current Extract repeated API retry logic into a function case the operative principle is: Functions encapsulate repeated behavior behind a single documented interface.

D:

JSON natively expresses objects and arrays while XML represents data as elements and attributes. This relates to JSON versus XML for a telemetry consumer. In the current Extract repeated API retry logic into a function case the operative principle is: Functions encapsulate repeated behavior behind a single documented interface.

Question 69

A team does not apply the necessary control or correction. Four scripts contain nearly identical request retry blocks and one has a stale backoff rule after an API rate-limit change. Which resulting failure or risk is most directly relevant?

  1. Duplicated code can diverge and keep a known rate-limit defect in one workflow.
  2. The string "false" is truthy in Python and could mistakenly enable a feature.
  3. A singleton holding mutable authentication state risks one tenant inheriting another's credentials.
  4. Sending YAML text while declaring JSON triggers parsing errors or invalid request handling.

Explanation

Correct Answer

A:

Duplicated code can diverge and keep a known rate-limit defect in one workflow. This is the direct exposure for Extract repeated API retry logic into a function. Mitigate with: Centralize retry handling in a reusable, tested function parameterized by status and retry bounds. Check success by: All four callers use the same bounded retry behavior when a simulated 429 occurs.

Incorrect Answers

B:

The string "false" is truthy in Python and could mistakenly enable a feature. This risk occurs in the different Preserve numeric and boolean data types situation. For the given Extract repeated API retry logic into a function requirement, the directly relevant risk is: Duplicated code can diverge and keep a known rate-limit defect in one workflow.

C:

A singleton holding mutable authentication state risks one tenant inheriting another's credentials. This risk occurs in the different Avoid Singleton for tenant-specific token clients situation. For the given Extract repeated API retry logic into a function requirement, the directly relevant risk is: Duplicated code can diverge and keep a known rate-limit defect in one workflow.

D:

Sending YAML text while declaring JSON triggers parsing errors or invalid request handling. This risk occurs in the different YAML config versus JSON API body situation. For the given Extract repeated API retry logic into a function requirement, the directly relevant risk is: Duplicated code can diverge and keep a known rate-limit defect in one workflow.

Question 70

The initial implementation fails or does not meet the expected behavior. Four scripts contain nearly identical request retry blocks and one has a stale backoff rule after an API rate-limit change. Which investigation should be prioritized to diagnose the problem?

  1. Inspect git status, conflicted hunks, resolution diff and unit tests.
  2. Inspect baseline requirements, stage-gate evidence and approved change requests.
  3. Capture outbound Content-Type and body bytes, and compare them against the endpoint example.
  4. Inspect import call sites, versioned helper implementation and retry-unit tests.

Explanation

Correct Answer

D:

Inspect import call sites, versioned helper implementation and retry-unit tests. These are the relevant initial evidence checks for Extract repeated API retry logic into a function. Intended action: Centralize retry handling in a reusable, tested function parameterized by status and retry bounds. Expected success condition: All four callers use the same bounded retry behavior when a simulated 429 occurs.

Incorrect Answers

A:

Inspect git status, conflicted hunks, resolution diff and unit tests. This investigation primarily applies to Resolve a merge conflict rather than force-push, not the current Extract repeated API retry logic into a function problem. Prioritize: Inspect import call sites, versioned helper implementation and retry-unit tests.

B:

Inspect baseline requirements, stage-gate evidence and approved change requests. This investigation primarily applies to Waterfall for a tightly approved migration, not the current Extract repeated API retry logic into a function problem. Prioritize: Inspect import call sites, versioned helper implementation and retry-unit tests.

C:

Capture outbound Content-Type and body bytes, and compare them against the endpoint example. This investigation primarily applies to YAML config versus JSON API body, not the current Extract repeated API retry logic into a function problem. Prioritize: Inspect import call sites, versioned helper implementation and retry-unit tests.

DevNet Associate (DEVASC) (200-901) Practice Tests

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