Step 1: Meaning of res judicata.
The term “res judicata” means “a matter already judged.” It prevents the same dispute between the same parties from being re-litigated once a competent court has given its final decision.
Step 2: Relevant provision.
Section 11 of the Code of Civil Procedure (CPC), 1908, enshrines the doctrine of res judicata.
Step 3: Conclusion.
Hence, Section 11 CPC ensures finality of judgments and prevents multiplicity of litigation.