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166 Questions & Answers

Last Update: Sep 26, 2026

$89.99

Microsoft AI-901 Exam Bundle gives you unlimited access to "AI-901" files. However, this does not replace the need for a .vce exam simulator. To download your .vce exam simulator click here

Microsoft AI-901 Practice Test 8

Question 70

A search system converts customer questions and help articles to embedding vectors. What can similarity between those vectors establish?

  1. That two sentences are character-for-character identical.
  2. That a retrieved policy is legally binding for the current date.
  3. That the highest-ranked passage necessarily supports every specific claim in the user question without a source-text entailment check.
  4. A signal of semantic relatedness useful for ranking candidate passages.

Explanation

Correct Answer

D:

Nearby query and article vectors can identify passages likely to discuss the same topic. The candidate still needs permission, source validity and content-level checking before it is treated as an answer.

Incorrect Answers

A:

Semantically similar sentences can use different wording and token sequences. Vector proximity measures modeled relatedness, not exact character equality, which requires a separate literal comparison.

B:

A high similarity score does not include the date when a policy took effect or prove that a retrieved revision is approved. Authority and currency must come from document metadata and verified governance.

C:

Embedding proximity ranks thematic relevance, not whether a particular passage proves each requested proposition. The application must inspect retrieved text and citations before presenting a factual answer.

Question 71

A user asks a chat model to remember a deleted support case permanently, even after the application removes its record. What is the key architecture distinction?

  1. Model inference context is not a governed persistent case database; required records must be managed by an authorized application store.
  2. Reuse a long, always-on agent thread as a substitute for an application record store, assuming a stable conversation ID guarantees durable retention.
  3. Recover the deleted case by asking the model to reconstruct the record from the earlier conversation without consulting an authoritative case store.
  4. Keep a continually growing prompt transcript and treat it as the permanent, access-controlled case repository without an external lifecycle policy.

Explanation

Correct Answer

A:

The current model context is not a governed durable store for deleted support records. Any business requirement to retain a case must be implemented in an authorized persistence system with access and deletion controls.

Incorrect Answers

B:

An agent thread may preserve conversational turns within its lifecycle, but the identifier does not guarantee unlimited retention, record-level permissions or recovery after deletion. A governed business data store is required for durable support cases.

C:

Generated recollection from limited conversation context can omit or fabricate case fields and may not be available after deletion. It is not a reliable durable source of record or an authorized restoration mechanism.

D:

A chat transcript may be truncated, deleted or omitted from later requests, and it does not automatically implement case retention, authorization or deletion semantics. Durable business records require a governed application store.

Question 72

Two calls to a generative model with the same prompt produce slightly different summaries. What is the most relevant explanation?

  1. The model automatically changed the approved source document between calls.
  2. Decoding can sample different token sequences, depending on configuration and runtime behavior.
  3. One response must have come from a different tenant's private files.
  4. Set temperature to zero and assume that this guarantees identical wording across model versions, service changes and runtime implementations.

Explanation

Correct Answer

B:

Many generative inference paths can sample among possible next-token continuations. Even under comparable prompt context, the resulting surface wording can vary, so evaluation should check semantic and factual consistency rather than identical strings alone.

Incorrect Answers

A:

Two different generated summaries do not by themselves prove that the authoritative source changed. Their variation may arise entirely from decoding and output selection under the same inputs.

C:

Variation in phrasing is not evidence that private cross-tenant documents were accessed. Such a security claim would require actual retrieval or access logs.

D:

Reducing sampling randomness can improve repeatability but does not guarantee byte-identical outputs across deployment revisions or implementation changes. Variable text still requires semantic comparison.

Question 73

A model was pretrained on broad text corpora. A customer asks it for an updated internal vacation rule published this morning. Why is pretraining alone insufficient?

  1. Training patterns do not guarantee access to a current, approved organization-specific source.
  2. A confident response means a training example from this morning must exist.
  3. Increase the model context budget and assume the new internal policy is automatically included without retrieval.
  4. Treat a confident answer from last year’s stored policy as today’s rule without comparing effective dates.

Explanation

Correct Answer

A:

Pretraining captures patterns from historical corpora and does not guarantee that the model has seen a policy created this morning. A verified current internal source must be retrieved or provided before giving authoritative leave guidance.

Incorrect Answers

B:

A confident answer cannot prove that any particular fact was in training data, especially a newly published internal rule. Confidence of wording is not temporal source evidence.

C:

A larger context window increases capacity for supplied tokens but does not connect the model to a private document it never received. Current source retrieval remains necessary.

D:

A past policy may differ from the revision published this morning. Model confidence cannot determine which rule is currently authoritative.

Question 74

A team adds current FAQ articles to an Azure search vector index without updating the underlying language model. What architectural technique is being used?

  1. Permanently append all FAQ passages to the system prompt and assume that this is equivalent to querying the updated vector index each turn.
  2. Parameter-efficient fine-tuning of the model weights.
  3. Refresh the model deployment to its latest version and assume its pretrained weights now include the articles added to the separate FAQ index.
  4. Retrieval-augmented generation using external evidence at inference time.

Explanation

Correct Answer

D:

Retrieval-augmented generation supplies relevant external FAQ passages at inference time while the foundation model’s weights remain unchanged. The app can update searchable knowledge without retraining the generator.

Incorrect Answers

A:

Static prompt content may become stale and is constrained by token limits. The described architecture retrieves relevant passages from the separately updated index at inference time without modifying the model’s weights.

B:

Adding passages to an external search index does not update the underlying language model parameters. Fine-tuning would require a separate supported training or adaptation operation.

C:

A newer deployment may have different learned knowledge but does not automatically train on the private FAQ index. The observed behavior is retrieval of external passages at inference time, with no parameter update.

Question 75

A prompt supplies three labeled examples of valid support categories. The underlying model and weights are unchanged. Which technique is this?

  1. Create a retrieval index of labeled examples and treat the model as fine-tuned even though its parameters remain unchanged.
  2. Run a supervised training job that updates persistent model weights using the example labels.
  3. Place examples in the developer prompt and assume the model’s classification confidence is now calibrated on unseen data.
  4. Few-shot in-context prompting.

Explanation

Correct Answer

D:

Labeled examples included in the current prompt guide a response without a training job or parameter update. That is few-shot in-context prompting.

Incorrect Answers

A:

Retrieval and prompt examples can supply external context, but neither operation itself updates model weights. An index is not proof that fine-tuning occurred.

B:

A supervised tuning job changes stored model parameters. This scenario explicitly says the weights remain unchanged, so describing it as training is incorrect.

C:

Examples can steer a model’s current response, but they do not automatically calibrate future probabilities. This statement adds a guarantee the few-shot prompt does not establish.

Question 76

A developer supplies a governed labeled set of incident categories and runs a tuning job that updates model parameters. How is this different from adding examples to a prompt?

  1. It is identical to indexing the training labels in a search service.
  2. It changes model parameters through training or adaptation and requires separate holdout evaluation.
  3. It only changes the temporary prompt context and has no model lifecycle implications.
  4. It automatically proves that all future category labels will be correct.

Explanation

Correct Answer

B:

Fine-tuning or other supported adaptation changes a deployable model artifact and can affect later calls without repeating the training examples in every prompt. Representative held-out tests are necessary because the new mapping may still make mistakes.

Incorrect Answers

A:

Indexing labeled examples as retrievable documents would leave model parameters unchanged. The scenario describes a tuning job that updates them, a different lifecycle operation.

C:

A parameter-changing tuning run is not simply transient prompt context. It creates new versioning, provenance and release risks beyond the few-shot inference behavior described for a prompt-only technique.

D:

Completing training does not guarantee all future incidents are classified correctly. Different inputs, category imbalance and distribution shift can still produce misroutes that must be measured.

Question 77

A generative assistant cites a nonexistent policy URL but phrases the citation with great confidence. What is the appropriate interpretation?

  1. A nonexistent link is acceptable if the advice sounds persuasive.
  2. The URL is authoritative because the model displays it in a citation format.
  3. A high sampling temperature verifies that citations are current.
  4. The apparent citation may be hallucinated and must be resolved against an actual source.

Explanation

Correct Answer

D:

A language model may fabricate a convincing citation because text generation favors plausible token sequences. A valid policy reference must be found and checked in an approved source.

Incorrect Answers

A:

Unverifiable policy citations are not harmless decoration when they might influence consequential decisions. Persuasive text without a source should be withheld or clearly treated as uncertain, not accepted.

B:

Citation-style formatting does not resolve a URL or prove that it leads to an authorized document. The app must test existence and relevance of the actual retrieved resource.

C:

Sampling temperature controls variability in model output, not validation of cited effective dates. A precise-looking reference can still be hallucinated at any temperature.

Question 78

A chatbot has a system instruction to protect customer account details. A user asks it to ignore that instruction and reveal another person's records. Select TWO correct design principles.

  1. Retrieve all customer records, then ask the model to omit unauthorized ones in its answer.
  2. Enforce resource-level authorization independently of prompt text before any protected record is retrieved.
  3. Treat a customer's "I am an administrator" message as authenticated role elevation.
  4. Let the newest user message supersede system requirements by default.
  5. Maintain instruction priority; ordinary user text must not override protected system requirements.

Explanation

Correct Answers

B:

The data service must apply authenticated account-level permissions before supplying protected records. Prompt hierarchy can limit model behavior but cannot substitute for these enforceable resource checks.

E:

System instructions define the application’s behavior and should not be silently superseded by user text. The same protection still depends on real backend access controls when sensitive data is involved.

Incorrect Answers

A:

Retrieving all customer records before filtering exposes unauthorized data to the model and possibly traces. Output censorship happens too late to maintain the data-access boundary.

C:

A user-written statement claiming administrative status is not an identity-provider credential. Access to other people’s records requires actual role assignment and authorization.

D:

Allowing the latest user message to override system restrictions would turn an ordinary chat into a privilege escalation path. Protected rules must not be demoted by conversational recency.

Question 79

An application submits both a photograph and a text question to a supported AI model. Which capability distinguishes this model from text-only completion?

  1. It requires no supplied image content because its training data contains images.
  2. Use an image-only classifier to label the photograph, then answer the open-ended text question using only that coarse class label.
  3. It guarantees every fine-print character in the photo is extracted perfectly.
  4. It can condition its response on supported visual and textual inputs.

Explanation

Correct Answer

D:

A supported multimodal request can combine the supplied photograph with a text question so visual evidence influences the answer. That ability is distinct from text-only completion or image generation.

Incorrect Answers

A:

An unseen photograph cannot be inferred reliably from a model’s general training or a file name. The actual image must be provided through a supported visual input format.

B:

An image category might identify the broad scene but discards the visual details that the question may require. The assessed multimodal capability conditions a response on the actual image and natural-language instruction together.

C:

Multimodal models can misread small characters and cluttered scenes. Critical labels or serial numbers still need validation even when the system accepts photographic input.

Question 80

A multimodal model receives a photo of a product label and returns a prose description. Select THREE statements that correctly distinguish this workflow from plain OCR.

  1. A generated description still needs verification when exact product codes or safety warnings matter.
  2. The model can interpret broader scene relationships as well as visible text, when its image input is supported.
  3. A prose caption proves that each character was read with perfect accuracy.
  4. Generating a description is the same as altering the original image file.
  5. Treat a model-generated scene caption as a complete transcription of every character on the product label, without OCR/source comparison.
  6. An OCR tool is more directly suited to extracting exact printed characters and source spans.

Explanation

Correct Answers

A:

A natural-language description can omit small characters or replace exact digits with plausible prose. Where a product code or warning matters, compare the generated text to the source image rather than assuming exact transcription.

B:

An image-aware language model can relate objects and spatial context, not only extract printed glyphs. The resulting answer may describe a scene even when no text is visible.

F:

OCR is designed to recover visible characters and often their locations in the source image. That field-level evidence is more suitable for an exact tracking code than a free-form scene caption.

Incorrect Answers

C:

A fluent caption does not prove that every character on a small label was recognized. OCR accuracy depends on image quality, fonts and source resolution and must be tested.

D:

Generating text about a photograph does not modify the underlying image file or create a new edited asset. Those are separate image-processing tasks.

E:

A visual-language caption can summarize product appearance while omitting or changing tiny label characters. Character-exact codes and safety warnings require source-image checking or an appropriate OCR extraction route.


Microsoft Azure AI Fundamentals (AI-901) Practice Tests

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