OCP Core Administration And Cdb Pdb Architecture Practice Question

What happens to existing sessions when you issue 'ALTER PLUGGABLE DATABASE PDB1 CLOSE'?

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

✓

Sessions are killed if IMMEDIATE is specified

By default, the command fails if sessions exist unless 'IMMEDIATE' is used.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
Sessions are migrated
Why it's wrong here
No migration occurs.
✗
The database waits indefinitely
Why it's wrong here
The command will error out.
✗
Sessions remain active
Why it's wrong here
The PDB will not close.
✓
Sessions are killed if IMMEDIATE is specified
Why this is correct
IMMEDIATE forces the closing of sessions.

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Last reviewed August 2026 · checked against the official Oracle exam blueprint

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