2026 New 1Z0-184-25 Exam Questions Real Oracle Dumps [Q23-Q40]

1Z0-184-25 Oracle

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January 13, 2026

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2026 New 1Z0-184-25 Exam Questions Real Oracle Dumps

Course 2026 1Z0-184-25 Test Prep Training Practice Exam Download

NEW QUESTION 23
What is a key advantage of using GoldenGate 23ai for managing and distributing vector data for AI applications?

Real-time vector data updates across locations

Automatic translation of vector embeddings between formats

Specialized vector embedding compression

Built-in version control for vector data

Oracle GoldenGate 23ai is a real-time data replication and integration tool, extended in 23ai to handle the VECTOR data type for AI applications. Its key advantage (A) is enabling real-time updates of vector data across distributed locations-e.g., replicating VECTOR columns from a primary database in New York to a secondary in London with sub-second latency. This ensures AI models (e.g., for similarity search or RAG) access the latest embeddings as source data (e.g., documents) changes, critical for dynamic environments like customer support systems where new queries demand current context. Imagine a VECTOR column storing embeddings of support tickets; GoldenGate keeps these synchronized across regions, minimizing staleness that could degrade AI responses.
Option B (automatic translation) is fictional; GoldenGate doesn’t convert vector formats (e.g., FLOAT32 to INT8)-that’s a model or application task. Option C (compression) isn’t a GoldenGate feature; compression might occur at the storage layer, but GoldenGate focuses on replication fidelity, not size reduction. Option D (version control) misaligns with GoldenGate’s purpose; it ensures data consistency, not historical versioning like Git. Real-time replication (A) stands out, as Oracle’s documentation emphasizes GoldenGate’s role in keeping vector-driven AI applications globally consistent, a game-changer for distributed AI deployments where latency or inconsistency could disrupt user trust. Without this, static exports (e.g., Data Pump) would lag, undermining real-time AI use cases.

NEW QUESTION 24
Which statement best describes the core functionality and benefit of Retrieval Augmented Generation (RAG) in Oracle Database 23ai?

It empowers LLMs to interact with private enterprise data stored within the database, leading to more context-aware and precise responses to user queries

It primarily aims to optimize the performance and efficiency of LLMs by using advanced data retrieval techniques, thus minimizing response times and reducing computational overhead

It allows users to train their own specialized LLMs directly within the Oracle Database environment using their internal data, thereby reducing reliance on external AI providers

It enables Large Language Models (LLMs) to access and process real-time data streams from diverse sources to generate the most up-to-date insights

RAG in Oracle Database 23ai combines vector search with LLMs to enhance responses by retrieving relevant private data from the database (e.g., via VECTOR columns) and augmenting LLM prompts. This (A) improves context-awareness and precision, leveraging enterprise-specific data without retraining LLMs. Optimizing LLM performance (B) is a secondary benefit, not the core focus. Training specialized LLMs (C) is not RAG’s purpose; it uses existing models. Real-time streaming (D) is possible but not the primary benefit, as RAG focuses on stored data retrieval. Oracle’s RAG documentation emphasizes private data integration for better LLM outputs.

NEW QUESTION 25
What is the primary function of an embedding model in the context of vector search?

To define the schema for a vector database

To execute similarity search operations within a database

To transform text or data into numerical vector representations

To store vectors in a structured format for efficient retrieval

An embedding model in the context of vector search, such as those used in Oracle Database 23ai, is fundamentally a machine learning construct (e.g., BERT, SentenceTransformer, or an ONNX model) designed to transform raw data-typically text, but also images or other modalities-into numerical vector representations (C). These vectors, stored in the VECTOR data type, encapsulate semantic meaning in a high-dimensional space where proximity reflects similarity. For instance, the word “cat” might be mapped to a 512-dimensional vector like [0.12, -0.34, …], where its position relative to “dog” indicates relatedness. This transformation is the linchpin of vector search, enabling mathematical operations like cosine distance to find similar items.
Option A (defining schema) misattributes a database design role to the model; schema is set by DDL (e.g., CREATE TABLE with VECTOR). Option B (executing searches) confuses the model with database functions like VECTOR_DISTANCE, which use the embeddings, not create them. Option D (storing vectors) pertains to the database’s storage engine, not the model’s function-storage is handled by Oracle’s VECTOR type and indexes (e.g., HNSW). The embedding model’s role is purely generative, not operational or structural. In practice, Oracle 23ai integrates this via VECTOR_EMBEDDING, which calls the model to produce vectors, underscoring its transformative purpose. Misunderstanding this could lead to conflating data preparation with query execution, a common pitfall for beginners.

NEW QUESTION 26
In the following Python code, what is the significance of prepending the source filename to each text chunk before storing it in the vector database?
bash
CollapseWrapCopy
docs = [{“text”: filename + “|” + section, “path”: filename} for filename, sections in faqs.items() for section in sections]
# Sample the resulting data
docs[:2]

It preserves context and aids in the retrieval process by associating each vectorized chunk with its original source file

It helps differentiate between chunks from different files but has no impact on vectorization

It speeds up the vectorization process by providing a unique identifier for each chunk

It improves the accuracy of the LLM by providing additional training data

Prepending the filename to each text chunk (e.g., filename + “|” + section) in the Python code (A) preserves contextual metadata, linking each chunk-and its resulting vector-to its source file. This aids retrieval in RAG applications by allowing the application to trace back to the original document, enhancing response context (e.g., “from Book1”). While it differentiates chunks (B), its impact goes beyond identification, affecting retrieval usability. It doesn’t speed up vectorization (C); embedding models process text regardless of prefixes. It also doesn’t train the LLM (D); it’s metadata for retrieval, not training data. Oracle’s RAG examples emphasize metadata preservation for context-aware responses.

NEW QUESTION 27
What is the purpose of the VECTOR_DISTANCE function in Oracle Database 23ai similarity search?

To fetch rows that match exact vector embeddings

To create vector indexes for efficient searches

To group vectors by their exact scores

To calculate the distance between vectors using a specified metric

The VECTOR_DISTANCE function in Oracle 23ai (D) computes the distance between two vectors using a specified metric (e.g., COSINE, EUCLIDEAN), enabling similarity search by quantifying proximity. It doesn’t fetch exact matches (A); it measures similarity. Index creation (B) is handled by CREATE INDEX, not this function. Grouping (C) requires additional SQL (e.g., GROUP BY), not VECTOR_DISTANCE’s role. Oracle’s SQL reference defines it as the core tool for distance calculation in vector queries.

NEW QUESTION 28
When generating vector embeddings for a new dataset outside of Oracle Database 23ai, which factor is crucial to ensure meaningful similarity search results?

The choice of programming language used to process the dataset (e.g., Python, Java)

The physical location where the vector embeddings are stored

The storage format of the new dataset (e.g., CSV, JSON)

The same vector embedding model must be used for vectorizing the data and creating a query vector

Meaningful similarity search relies on the consistency of the vector space in which embeddings reside. Vector embeddings are generated by models (e.g., BERT, SentenceTransformer) that map data into a high-dimensional space, where proximity reflects semantic similarity. If different models are used for the dataset and query vector, the embeddings will be in incompatible spaces, rendering distance metrics (e.g., cosine, Euclidean) unreliable. The programming language (A) affects implementation but not the semantic consistency of embeddings-Python or Java can use the same model equally well. The physical storage location (B) impacts accessibility and latency but not the mathematical validity of similarity comparisons. The storage format (C) influences parsing andingestion but does not determine the embedding space. Oracle 23ai’s vector search framework explicitly requires the same embedding model for data and queries to ensure accurate results, a principle that applies universally, even outside the database.

NEW QUESTION 29
How is the security interaction between Autonomous Database and OCI Generative AI managed in the context of Select AI?

By encrypting all communication between the Autonomous Database and OCI Generative AI using TLS/SSL protocols

By utilizing Resource Principals, which grant the Autonomous Database instance access to OCI Generative AI without exposing sensitive credentials

By establishing a secure VPN tunnel between the Autonomous Database and OCI Generative AI service

By requiring users to manually enter their OCI API keys each time they execute a natural language query

In Oracle Database 23ai’s Select AI, security between the Autonomous Database and OCI Generative AI is managed using Resource Principals (B). This mechanism allows the database instance to authenticate itself to OCI services without hardcoding credentials, enhancing security by avoiding exposure of sensitive keys. TLS/SSL encryption (A) is used for data-in-transit security, but it’s a complementary layer, not the primary management method. A VPN tunnel (C) is unnecessary within OCI’s secure infrastructure and not specified for Select AI. Manual API key entry (D) is impractical and insecure for automated database interactions. Oracle’s documentation on Select AI highlights Resource Principals as the secure, scalable authentication method.

NEW QUESTION 30
Which is NOT a feature or capability related to AI and Vector Search in Exadata?

Native Support for Vector Search Only within the Database Server

Vector Replication with GoldenGate

Loading Vector Data using SQL*Loader

AI Smart Scan

Exadata in Oracle Database 23ai enhances AI and vector search capabilities. Vector Replication with GoldenGate (B) supports real-time vector data distribution. SQL*Loader (C) loads vector data into VECTOR columns. AI Smart Scan (D) accelerates AI workloads using Exadata’s storage optimizations. However, “Native Support for Vector Search Only within the Database Server” (A) is not a feature; vector search is natively supported across Exadata’s architecture, leveraging both database and storage layers (e.g., via Smart Scan), not restricted to the server alone. This option misrepresents Exadata’s distributed capabilities, making it the correct “NOT” answer.

NEW QUESTION 31
A machine learning team is using IVF indexes in Oracle Database 23ai to find similar images in a large dataset. During testing, they observe that the search results are often incomplete, missing relevant images. They suspect the issue lies in the number of partitions probed. How should they improve the search accuracy?

Increase the VECTOR_MEMORY_SIZE initialization parameter

Change the index type to HNSW for better accuracy

Re-create the index with a higher EFCONSTRUCTION value

Add the TARGET_ACCURACY clause to the query with a higher value for the accuracy

IVF (Inverted File) indexes in Oracle 23ai partition vectors into clusters, probing a subset during queries for efficiency. Incomplete results suggest insufficient partitions are probed, reducing recall. The TARGET_ACCURACY clause (A) allows users to specify a desired accuracy percentage (e.g., 90%), dynamically increasing the number of probed partitions to meet this target, thus improving accuracy at the cost of latency. Switching to HNSW (B) offers higher accuracy but requires re-indexing and may not be necessary if IVF tuning suffices. Increasing VECTOR_MEMORY_SIZE (C) allocates more memory for vector operations but doesn’t directly affect probe count. EFCONSTRUCTION (D) is an HNSW parameter, irrelevant to IVF. Oracle’s IVF documentation highlights TARGET_ACCURACY as the recommended tuning mechanism.

NEW QUESTION 32
What is the primary purpose of the VECTOR_EMBEDDING function in Oracle Database 23ai?

To calculate vector dimensions

To calculate vector distances

To serialize vectors into a string

To generate a single vector embedding for data

The VECTOR_EMBEDDING function in Oracle 23ai (D) generates a vector embedding from input data (e.g., text) using a specified model (e.g., ONNX), producing a single VECTOR-type output for similarity search or AI tasks. It doesn’t calculate dimensions (A); VECTOR_DIMENSION_COUNT does that. It doesn’t compute distances (B); VECTOR_DISTANCE is for that. It doesn’t serialize vectors (C); VECTOR_SERIALIZE handles serialization. Oracle’s documentation positions VECTOR_EMBEDDING as the core function for in-database embedding creation, central to vector search workflows.

NEW QUESTION 33
What happens when querying with an IVF index if you increase the value of the NEIGHBOR_PARTITIONS probes parameter?

The number of centroids decreases

Accuracy decreases

Index creation time is reduced

More partitions are probed, improving accuracy, but also increasing query latency

The NEIGHBOR_PARTITIONS parameter in Oracle 23ai’s IVF index controls how many partitions are probed during a query. Increasing this value examines more clusters, raising theprobability of finding relevant vectors, thus improving accuracy (recall). However, this increases computational effort, leading to higher query latency-a classic ANN trade-off. The number of centroids (A) is fixed during index creation and unaffected by query parameters. Accuracy does not decrease (B); it improves. Index creation time (C) is unrelated to query-time settings. Oracle’s documentation on IVF confirms that NEIGHBOR_PARTITIONS directly governs this accuracy-latency balance.

NEW QUESTION 34
What is the primary purpose of the DBMS_VECTOR_CHAIN.UTL_TO_CHUNKS package in a RAG application?

To generate vector embeddings from a text document

To load a document into the database

To split a large document into smaller chunks to improve vector quality by minimizing token truncation

To convert a document into a single, large text string

In Oracle Database 23ai, the DBMS_VECTOR_CHAIN package supports Retrieval Augmented Generation (RAG) workflows by providing utilities for vector processing. The UTL_TO_CHUNKS function specifically splits large documents into smaller, manageable text chunks. This is critical in RAG applications because embedding models (e.g., BERT, ONNX models) have token limits (e.g., 512 tokens). Splitting text minimizes token truncation, ensuring that each chunk retains full semantic meaning, which improves the quality of subsequent vector embeddings and search accuracy. Generating embeddings (A) is handled by functions like VECTOR_EMBEDDING, not UTL_TO_CHUNKS. Loading documents (B) is a separate process (e.g., via SQL*Loader). Converting to a single text string (D) contradicts the chunking purpose and risks truncation. Oracle’s documentation on DBMS_VECTOR_CHAIN emphasizes chunking for optimizing vector quality in RAG.

NEW QUESTION 35
An application needs to fetch the top-3 matching sentences from a dataset of books while ensuring a balance between speed and accuracy. Which query structure should you use?

Approximate similarity search with the VECTOR_DISTANCE function

Exact similarity search with Euclidean distance

Multivector similarity search with approximate fetching and target accuracy

A combination of relational filters and similarity search

Fetching the top-3 matching sentences requires a similarity search, and balancing speed and accuracy points to approximate nearest neighbor (ANN) techniques. Option A-approximate similarity search with VECTOR_DISTANCE-uses an index (e.g., HNSW, IVF) to quickly find near-matches, ordered by distance (e.g., SELECT sentence, VECTOR_DISTANCE(vector, :query_vector, COSINE) AS score FROM books ORDER BY score FETCH APPROXIMATE 3 ROWS ONLY). The APPROXIMATE clause leverages indexing for speed, with tunable accuracy (e.g., TARGET_ACCURACY), ideal for large datasets where exactness is traded for performance.
Option B (exact search with Euclidean) scans all vectors without indexing, ensuring 100% accuracy but sacrificing speed-impractical for big datasets. Option C (“multivector” search) isn’t a standard Oracle 23ai construct; it might imply multiple vectors per row, but lacks clarity and isn’t optimal here. Option D (relational filters plus similarity) adds WHERE clauses (e.g., WHERE genre = ‘fiction’), useful for scoping but not specified as needed, and doesn’t inherently balance speed-accuracy without ANN. Oracle’s ANN support in 23ai, via HNSW or IVF withVECTOR_DISTANCE, makes A the practical choice, aligning with real-world RAG use cases where response time matters as much as relevance.

NEW QUESTION 36
Which Oracle Cloud Infrastructure (OCI) service is directly integrated with Select AI?

OCI Language

OCI Generative AI

OCI Vision

OCI Data Science

Select AI in Oracle Database 23ai integrates with OCI Generative AI (B) to process natural language queries and generate context-aware responses using large language models (LLMs). OCI Language (A) focuses on text analysis (e.g., sentiment, entity recognition), not generative tasks. OCI Vision (C) handles image processing, unrelated to Select AI’s text-based functionality. OCI Data Science (D) supports model development, not direct integration with Select AI. Oracle’s documentation explicitly names OCI Generative AI as the integrated service for Select AI’s LLM capabilities.

NEW QUESTION 37
When using SQL*Loader to load vector data for search applications, what is a critical consideration regarding the formatting of the vector data within the input CSV file?

Enclose vector components in curly braces ({})

As FVEC is a binary format and the vector dimensions have a known width, fixed offsets can be used to make parsing the vectors fast and efficient

Use sparse format for vector data

Rely on SQL*Loader’s automatic normalization of vector data

SQLLoader in Oracle 23ai supports loading VECTOR data from CSV files, requiring vectors to be formatted as text. A critical consideration is enclosing components in curly braces (A), e.g., {1.2, 3.4, 5.6}, to match the VECTOR type’s expected syntax (parsed into FLOAT32, etc.). FVEC (B) is a binary format, not compatible with CSV text input; SQLLoader expects readable text, not fixed offsets. Sparse format (C) isn’t supported for VECTOR columns, which require dense arrays. SQLLoader doesn’t normalize vectors automatically (D); formatting must be explicit. Oracle’s documentation specifies curly braces for CSV-loaded vectors.

NEW QUESTION 38
How does an application use vector similarity search to retrieve relevant information from a database, and how is this information then integrated into the generation process?

Encodes the question and database chunks into vectors, finds the most similar using cosine similarity, and includes them in the LLM prompt

Trains a separate LLM on the database and uses it to answer, ignoring the general LLM

Converts the question to keywords, searches for matches, and inserts the text into the response

Clusters similar text chunks and randomly selects one from the most relevant cluster

In Oracle 23ai’s RAG framework, vector similarity search (A) encodes a user question and database chunks into vectors (e.g., via VECTOR_EMBEDDING), computes similarity (e.g., cosine via VECTOR_DISTANCE), and retrieves the most relevant chunks. These are then included in the LLM prompt, augmenting its response with context. Training a separate LLM (B) is not RAG; RAG uses existing models. Keyword search (C) is traditional, not vector-based, and less semantic. Clustering and random selection (D) lacks precision and isn’t RAG’s approach. Oracle’s documentation describes this encode-search-augment process as RAG’s core mechanism.

NEW QUESTION 39
Which Python library is used to vectorize text chunks and the user’s question in the following example?
import oracledb
connection = oracledb.connect(user=un, password=pw, dsn=ds)
table_name = “Page”
with connection.cursor() as cursor:
create_table_sql = f”””
CREATE TABLE IF NOT EXISTS {table_name} (
id NUMBER PRIMARY KEY,
payload CLOB CHECK (payload IS JSON),
vector VECTOR
)”””
try:
cursor.execute(create_table_sql)
except oracledb.DatabaseError as e:
raise
connection.autocommit = True
from sentence_transformers import SentenceTransformer
encoder = SentenceTransformer(‘all-MiniLM-L12-v2’)

sentence_transformers

oci

oracledb

json

In the provided Python code, the sentence_transformers library (A) is imported and used to instantiate a SentenceTransformer object with the ‘all-MiniLM-L12-v2’ model. This library is designed to vectorize text (e.g., chunks and questions) into embeddings, a common step in RAG applications. The oracledb library (C) handles database connectivity, not vectorization. oci (B) is for OCI service interaction, not text embedding. json (D) processes JSON data, not vectors. The code explicitly uses sentence_transformers for vectorization, consistent with Oracle’s examples for external embedding integration.

NEW QUESTION 40
Which PL/SQL function converts documents such as PDF, DOC, JSON, XML, or HTML to plain text?

DBMS_VECTOR.TEXT_TO_PLAIN

DBMS_VECTOR_CHAIN.UTL_TO_TEXT

DBMS_VECTOR_CHAIN.UTL_TO_CHUNKS

DBMS_VECTOR.CONVERT_TO_TEXT

In Oracle Database 23ai, DBMS_VECTOR_CHAIN.UTL_TO_TEXT is the PL/SQL function that converts documents in formats like PDF, DOC, JSON, XML, or HTML into plain text, a key step in preparing data for vectorization in RAG workflows. DBMS_VECTOR.TEXT_TO_PLAIN (A) is not a valid function. DBMS_VECTOR_CHAIN.UTL_TO_CHUNKS (C) splits text into smaller segments, not converts documents. DBMS_VECTOR.CONVERT_TO_TEXT (D) does not exist in the documented packages. UTL_TO_TEXT is part of the DBMS_VECTOR_CHAIN package, designed for vector processing pipelines, and is explicitly noted for document conversion in Oracle’s documentation.

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Oracle 1Z0-184-25 Exam Syllabus Topics:

Topic	Details
Topic 1	Using Vector Indexes: This section evaluates the expertise of AI Database Specialists in optimizing vector searches using indexing techniques. It covers the creation of vector indexes to enhance search speed, including the use of HNSW and IVF vector indexes for performing efficient search queries in AI-driven applications.
Topic 2	Performing Similarity Search: This section tests the skills of Machine Learning Engineers in conducting similarity searches to find relevant data points. It includes performing exact and approximate similarity searches using vector indexes. Candidates will also work with multi-vector similarity search to handle searches across multiple documents for improved retrieval accuracy.
Topic 3	Leveraging Related AI Capabilities: This section evaluates the skills of Cloud AI Engineers in utilizing Oracle’s AI-enhanced capabilities. It covers the use of Exadata AI Storage for faster vector search, Select AI with Autonomous for querying data using natural language, and data loading techniques using SQL Loader and Oracle Data Pump to streamline AI-driven workflows.