PracticeVideosBlogFlashcardsEspañol
All Practice Exams

100+ Free Denodo Platform 9 Certified Developer Professional Practice Questions

Pass your Denodo Platform 9 Certified Developer Professional (DEN9EDUCDP) exam on the first try — instant access, no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately
100+ Questions
100% Free
1 / 100
Question 1
Score: 0/0

What information does the Denodo cost-based optimizer rely on to choose the most efficient execution plan?

A
B
C
D
to track
Same family resources

Explore More Denodo Certifications

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

Denodo Certified Associate (Data Virtualization)

Practice Questions
2026 Statistics

Key Facts: Denodo Platform 9 Certified Developer Professional Exam

60

Multiple-Choice Questions

Denodo Technologies

120 min

Time Limit (+30 min non-native English)

Denodo Technologies

75%

Passing Score

Denodo Technologies

DEN9EDUCDP

Exam Code (Denodo Platform 9)

Denodo Technologies

Free

Cost with corporate/educational email

Denodo Technologies

1 year

Exam Eligibility Validity

Denodo Technologies

The Denodo Platform 9 Certified Developer Professional (DEN9EDUCDP) exam has 60 multiple-choice questions, a 120-minute limit, and a 75% passing score, delivered online and proctored by webcam through Mettl. It is complimentary for Denodo customers, partners, and anyone with a corporate or educational email. The blueprint covers Virtual DataPort modeling, VQL, the cost-based optimizer and data movement, Full/Partial/Incremental caching, SOAP/REST/OData/GraphQL data services, row/column security, Scheduler jobs, and Solution Manager promotions.

Sample Denodo Platform 9 Certified Developer Professional Practice Questions

Try these sample questions to test your Denodo Platform 9 Certified Developer Professional exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In the Denodo Platform, what does Virtual DataPort (VDP) primarily provide?
A.A data virtualization layer that presents distributed, heterogeneous sources as a single virtual database
B.A physical data warehouse that permanently copies all source data into Denodo storage
C.An ETL scheduler that only moves files between FTP servers
D.A relational database engine that replaces the underlying source systems
Explanation: Virtual DataPort is the core data virtualization engine of the Denodo Platform. It acts as a mediator that exposes distributed and heterogeneous sources (databases, web services, files, applications) as a single unified 'virtual' database, querying sources in real time rather than physically copying all their data.
2Which type of Denodo view directly represents and retrieves data from an external data source such as a relational table or web service?
A.Derived view
B.Base view
C.Interface view
D.Materialized summary
Explanation: A base view directly maps to an external source object (a JDBC table, a JSON/XML resource, a web service operation, etc.) and is the entry point through which Virtual DataPort accesses source data. Base views are created by importing a data source and then creating the view over it.
3A developer creates a new view by joining two existing base views and adding a calculated field. What kind of view is this?
A.Base view
B.Stored procedure
C.Derived view
D.Data source
Explanation: A derived view is created with CREATE VIEW by combining or transforming existing views using operations such as join, union, selection, projection, group by, flatten, intersect, and minus. Adding a calculated (derived) field on top of a join is a classic derived view.
4What is the main purpose of an interface view in Virtual DataPort?
A.To physically cache the result of a query in a JDBC database
B.To store statistics used by the cost-based optimizer
C.To publish a view automatically as a SOAP web service
D.To define only a set of fields and delegate execution to a separate implementation view, enabling top-down design
Explanation: An interface view is a special derived view that consists only of a field definition plus a reference to an implementation view. It supports top-down design: you define the contract (fields) first and later set or swap the implementation, decoupling consumers from the underlying view.
5Which language does Virtual DataPort use as its Data Definition and Data Manipulation Language for creating and querying views?
A.VQL (Virtual Query Language)
B.PL/SQL
C.MDX
D.HiveQL
Explanation: VQL (Virtual Query Language) is Denodo's SQL-compatible language used to create, modify, and query the elements of the Virtual DataPort catalog. It extends standard SQL with constructs specific to data virtualization, such as CONTEXT clauses and flatten operations.
6You need to connect Virtual DataPort to a PostgreSQL database to import tables as base views. Which type of data source should you create?
A.JSON data source
B.JDBC data source
C.Custom data source
D.Web service (SOAP) data source
Explanation: Relational databases such as PostgreSQL, Oracle, SQL Server, and MySQL are accessed through a JDBC data source, which uses the appropriate JDBC adapter/driver. From the JDBC data source you import schemas and create base views over the tables, views, or queries.
7In Denodo, what is the recommended tool for creating base views, derived views, and data sources graphically instead of hand-writing VQL?
A.Solution Manager
B.Scheduler Web Administration Tool
C.Design Studio
D.Data Catalog
Explanation: Design Studio is the web-based development tool for Virtual DataPort in Denodo 9. Denodo strongly recommends using Design Studio to create data sources and views graphically; it generates the underlying VQL automatically rather than requiring manual scripting.
8A union view in Virtual DataPort combines two views with partially different schemas. Using a standard UNION (not UNION ALL preserving extra fields), how is the output schema formed?
A.The second view's schema fully replaces the first view's schema
B.The output always contains the cartesian product of both schemas
C.Only fields common to both views by data type are kept, regardless of name
D.Only the fields of the first view are kept; fields present only in the second view are excluded
Explanation: In a standard UNION, the output schema is based on the first view; fields that exist only in the second view are excluded from the result. This is a common exam point: combining heterogeneous schemas requires explicitly mapping or adding fields so they align across branches.
9Which set correctly lists join execution methods available in Virtual DataPort?
A.HASH, NESTED, MERGE, and NESTED PARALLEL
B.NESTED, HASH, and LEFT OUTER
C.HASH and MERGE only
D.SORT-MERGE and BITMAP only
Explanation: Virtual DataPort supports the HASH, NESTED, MERGE, and NESTED PARALLEL join execution methods. The cost-based optimizer selects the best one automatically when statistics are available, but developers should understand them for troubleshooting and manual tuning.
10You join a small view A (1,000 rows) with a large view B (1,000,000 rows) from two different JDBC sources. For a NESTED join, which branch should generally be the outer (left) branch for best performance?
A.The large view B, so its rows drive the iteration
B.The small view A, so fewer queries are issued to the other source
C.It does not matter; nested join performance is independent of branch order
D.Neither; nested joins are not allowed across different JDBC sources
Explanation: In a NESTED join, Virtual DataPort iterates over the outer (left) branch and, for each row, queries the inner branch. Putting the smaller view (A) on the outer side minimizes the number of parameterized queries sent to the inner source, improving performance and reducing source load.

About the Denodo Platform 9 Certified Developer Professional Exam

The Denodo Platform 9 Certified Developer Professional (DEN9EDUCDP) exam validates that a developer can design, develop, and deploy intelligent data delivery solutions on the Denodo Platform 9 using data virtualization. It covers the Virtual DataPort architecture; connecting to relational databases, web services, JSON/XML, delimited files, Excel, Salesforce, and LDAP; creating base, derived, and interface views; and combining data with joins, unions, flatten, and associations. The exam goes deep on VQL, the cost-based optimizer, query delegation and data movement, Full/Partial/Incremental caching, and publishing data through SOAP, REST, OData, and GraphQL services. It also assesses row and column security, masking, roles and policies, Scheduler jobs, and promoting metadata across environments with the Solution Manager.

Questions

60 scored questions

Time Limit

120 minutes

Passing Score

75%

Exam Fee

Complimentary with a corporate or educational email (Denodo Technologies)

Denodo Platform 9 Certified Developer Professional Exam Content Outline

Core

Logical architecture, Virtual DataPort, and platform components

Data virtualization concepts, Virtual DataPort architecture and basic concepts, virtual databases, and administration tools including Design Studio and the Data Catalog.

Core

Connecting to data sources and creating base views

Importing JDBC, SOAP/REST, JSON/XML, delimited file, Excel, Salesforce, and LDAP sources; creating base views; complex types; and search methods (query capabilities).

Core

Creating views and combining data

Derived views with joins, unions, selections, intersections, minus, and flatten; interface views; associations; primary keys; and data modeling best practices.

Core

VQL, execution, traces, and logs

Virtual Query Language for DDL/DML, the CONTEXT clause, stored procedures, and analyzing execution traces and logs to verify delegation and performance.

Core

Query optimization and performance

Cost-based optimizer and statistics, query delegation/pushdown, join strategies, data movement, partition pruning, aggregation pushdown, summaries, and swapping policies.

Core

Caching and persisting data

Full, Partial, and Incremental cache modes, cache database, preload and refresh via the Scheduler, cache indexes, and invalidation, with strategy selection.

Core

Data services, security, and deployment

Publishing SOAP/REST/OData/GraphQL services; row/column security, masking, roles, custom and global policies, authentication; and Solution Manager promotions and VCS integration.

How to Pass the Denodo Platform 9 Certified Developer Professional Exam

What You Need to Know

  • Passing score: 75%
  • Exam length: 60 questions
  • Time limit: 120 minutes
  • Exam fee: Complimentary with a corporate or educational email

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

Denodo Platform 9 Certified Developer Professional Study Tips from Top Performers

1Master the three cache modes: know that Full cache always reads from the cache (returning 0 rows if not preloaded) and can delegate multi-view joins, while Partial fills on demand and Incremental refreshes deltas.
2Be fluent in join execution methods (HASH, NESTED, MERGE, NESTED PARALLEL) and remember to put the smaller view on the outer branch of a NESTED join to reduce inner queries.
3Understand pushdown and data movement: the optimizer delegates filters, projections, joins, and aggregations to sources, and data movement transfers a small view into the large view's database for in-source execution.
4Practice reading execution traces to confirm whether filters and joins were delegated, and remember that the cost-based optimizer needs gathered, refreshed statistics to choose good plans.
5Know the data service options cold: SOAP is operation-oriented, REST is resource-oriented (HTML/XML/JSON/RSS), OData is a BI-friendly standard, and GraphQL auto-generates its schema from view metadata and maps associations to nested objects.
6Review the security model: row and column restrictions with masking are evaluated before each query, global policies apply one rule to many views, and custom policies can rate-limit or time-restrict using full query context.

Frequently Asked Questions

What are the exam facts for the Denodo DEN9EDUCDP exam?

The Denodo Platform 9 Certified Developer Professional (DEN9EDUCDP) exam has 60 multiple-choice questions, a 120-minute time limit, and a 75% passing score. It is delivered in English and proctored online via webcam through Mettl; test centers are not offered.

How much does the DEN9EDUCDP exam cost?

For Denodo Platform 9, the certification is complimentary for Denodo customers, partners, and anyone registering with a corporate or educational email address. Personal email addresses are not supported. Earlier Denodo 8.0 developer exams had a list price of about $200.

What topics does the DEN9EDUCDP exam cover?

It covers Virtual DataPort architecture, connecting to data sources, creating base/derived/interface views, combining data, VQL, query optimization (cost-based optimizer, data movement), caching, data services (SOAP/REST/OData/GraphQL), security, Scheduler jobs, and Solution Manager deployment.

What is the difference between the Associate and Professional Denodo developer exams?

The Developer Associate (DEN9EDUCDA) tests fundamentals in 40-50 questions over 90 minutes, while the Developer Professional (DEN9EDUCDP) is deeper, with 60 questions in 120 minutes and a 75% passing score, validating job-ready development skills.

How long is the certification valid?

The certification is tied to Denodo Platform 9. Exam eligibility (after purchase or registration) is valid for one year, with no extensions; if you do not schedule the exam before eligibility expires, the registration is forfeited.

How do I get my DEN9EDUCDP results?

Results are delivered no later than two weeks after you submit the exam. The report shows pass/fail status, your final score, and per-topic performance with recommendations on areas to strengthen; individual answers are not provided.