OCP Core Administration And Cdb Pdb Architecture Practice Question
What happens when you execute 'ALTER PLUGGABLE DATABASE ALL OPEN'?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Opens all PDBs in read-write mode
All PDBs in the CDB are opened in READ WRITE mode.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Opens only PDB$SEED
Why it's wrong here
PDB$SEED is not opened with ALL.
- ✓
Opens all PDBs in read-write mode
Why this is correct
The ALL clause applies to all PDBs.
- ✗
Opens all PDBs in read-only mode
Why it's wrong here
Default is read-write.
- ✗
Starts the CDB instance
Why it's wrong here
The instance must be started first.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Oracle exam blueprint
This OCP practice question is part of Courseiva's free Oracle certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the OCP exam.