1Z0-006 Cheat Sheet 2026

The 30 highest-yield 1Z0-006 facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which function returns the number of rows in a group or entire table? → COUNT()
2. The principle of least privilege suggests that users should: → Receive only necessary privileges
3. Which automatic feature in Oracle attempts to protect against SQL injection by verifying input types? → DBMS_ASSERT
4. In the context of the relational data model, what is the primary purpose of normalization? → To reduce data redundancy and improve data integrity.
5. Which statement about indexes and DML operations in Oracle Database is TRUE? → Oracle automatically updates all indexes when DML operations modify indexed column values
6. When a FOREIGN KEY constraint with ON DELETE CASCADE is defined, what happens when a parent row is deleted? → The child rows are automatically deleted
7. What does the CURRVAL pseudo-column of an Oracle sequence return? → The most recently generated value from the sequence in the current session
8. To remove all rows from a table quickly while preserving its structure, use: → TRUNCATE TABLE
9. What is a composite primary key in Oracle Database? → A primary key made up of two or more columns
10. Which SQL clause is used to remove duplicate rows from a query result? → DISTINCT
11. In which scenario is a bitmap index most appropriate in Oracle Database? → A column with low cardinality such as a status flag or gender code
12. What is the PRIMARY purpose of obtaining 1Z0-006 certification in Oracle Database Foundations Associate? → To demonstrate verified competency and adherence to professional standards
13. Which statement about the PRIMARY KEY constraint is correct? → A PRIMARY KEY uniquely identifies each row and does not allow NULLs
14. A subquery enclosed in parentheses that returns a single value used in an outer query is called: → Scalar subquery
15. What is a composite index in Oracle Database? → An index that spans two or more columns of a table
16. Which statement correctly retrieves the `employee_id` and `last_name` for all employees in `department_id` 50 from the `employees` table? → SELECT employee_id, last_name FROM employees WHERE department_id = 50;
17. What is the MOST effective way for new 1Z0-006 professionals to build competency in their field? → Combining formal education, mentored practice, and ongoing professional development
18. Which of the following is a key advantage of using views in Oracle Database? → Views can simplify complex queries and restrict user access to specific columns or rows
19. What is a function-based index in Oracle Database? → An index built on the result of an expression or function applied to one or more columns
20. Which Oracle constraint ensures that a column value cannot be NULL? → NOT NULL
21. In a relational database, a PRIMARY KEY constraint ensures that: → Each row has a unique, non‑NULL identifier
22. Oracle SQL*Loader is primarily used to: → Load data from flat files into tables
23. Which pseudo-column retrieves the NEXT value from an Oracle sequence and increments the counter? → sequence_name.NEXTVAL
24. Which command permanently saves all outstanding transactions in an Oracle database? → COMMIT
25. Data Pump Export (expdp) differs from the legacy EXPORT utility by: → Supporting parallel, direct-path export
26. Which Oracle memory structure caches recently accessed data blocks? → Database Buffer Cache
27. Which component parses and caches SQL execution plans in memory? → Library cache
28. A FOREIGN KEY constraint enforces: → Referential integrity between tables
29. What role does collaboration play in data modeling for 1Z0-006 professionals? → It enhances outcomes through diverse perspectives and shared expertise
30. Which foundational principle is MOST important for success in the Oracle Database Foundations Associate profession? → Commitment to continuous learning, ethical practice, and quality outcomes