OCP Cheat Sheet 2026

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

1. What does the Oracle parameter 'SORT_AREA_SIZE' control? → The memory allocated for sorting operations
2. What is an Oracle database index used for? → To speed up query performance
3. Which of the following correctly creates a Locale for Brazilian Portuguese? → new Locale("pt", "BR")
4. Which of the following is a valid and most concise lambda expression for a `java.util.function.Predicate` that tests if a string is empty? → String::isEmpty
5. What is a key feature of Oracle RAC (Real Application Clusters)? → Multiple instances accessing a shared database
6. What is the output of `DateTimeFormatter.ofPattern("MM/dd/uuuu").format(LocalDate.of(2024, 6, 5))`? → "06/05/2024"
7. In Database Architecture & Administration, what is the FIRST step a OCP professional should take when encountering a new case or situation? → Conduct a comprehensive assessment and gather all relevant information
8. Which Oracle system privilege allows a user to query data in any table in the database without being explicitly granted object-level SELECT privileges? → SELECT ANY TABLE
9. Which Java I/O class provides methods like readInt() and readDouble() to read primitive data types from a binary file? → DataInputStream
10. Which interface in Java NIO.2 (introduced in Java 7) represents a path to a file or directory on the file system? → java.nio.file.Path
11. Which StandardWatchEventKinds constant signals that a new file or directory was created in a directory watched by WatchService? → ENTRY_CREATED
12. What is the purpose of a trigger in PL/SQL? → To automatically perform actions based on certain events
13. Which Java class is designed specifically to read character data from a file using a character stream? → FileReader
14. Which method of the java.io.File class returns true if the file or directory at the specified path exists on the file system? → exists()
15. Which PL/SQL block is used to handle exceptions? → EXCEPTION
16. Which Java class represents a specific geographic, political, or cultural region used for localization? → Locale
17. What is the Oracle Archive Log Mode? → It allows point-in-time recovery
18. What is the primary purpose of a `sealed` class in Java 17? → To restrict which other classes or interfaces may extend or implement it.
19. Which Oracle process is responsible for performing background database tasks like recovery and managing transactions? → DBWR
20. What does 'EXPLAIN PLAN' in Oracle do? → It shows the query's execution plan
21. What is the result of `LocalDate.of(2024, 1, 31).plusMonths(1)`? → 2024-02-29
22. What is the purpose of the Oracle instance? → It manages the database's processes and memory
23. What is the main purpose of Oracle's Automatic Workload Repository (AWR)? → To gather performance data for tuning
24. What is a sequence in SQL? → A generator of unique numbers
25. What happens at runtime when ObjectOutputStream.writeObject() is called with an object whose class does not implement Serializable? → A NotSerializableException is thrown at runtime
26. What is the primary benefit of wrapping a FileWriter with a BufferedWriter in Java? → It reduces the number of actual write operations through internal buffering
27. What is the purpose of the serialVersionUID field in a Java serializable class? → To provide a version identifier for compatibility verification during deserialization
28. Which Oracle memory structure holds all the necessary information for managing a user’s session? → Program Global Area (PGA)
29. Which two factory methods can be used to create a Path object in Java NIO.2? → Paths.get() and Path.of()
30. What does granting a role WITH ADMIN OPTION allow the grantee to do? → Re-grant that role to other users