Which of the below author is not a part of GOF (Gang of Four)?
(a) Erich Gamma
(b) Gang Pattern
(c) Richard Helm
(d) Ralph Johnson
(a) Erich Gamma
(b) Gang Pattern
(c) Richard Helm
(d) Ralph Johnson
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Correct option is (b) Gang Pattern
The explanation: Four authors named Richard Helm, Erich Gamma, Ralph Johnson and John Vlissides published a book on design patterns. This book initiated the concept of Design Pattern in Software development. They are known as Gang of Four (GOF).