HKIE Professional Assessment - Information Discipline Practice Questions - HKIE Professional Assessment - Information Discipline (Hong Kong Institution Of Engineers) Exam

High-level modules should not depend on low-level modules; both should depend on abstractions. Objects in a program should be replaceable with instances of their subtypes without altering the correctness of the program. Software entities should be open for extension, but closed for modification. Clients should not be forced to depend upon interfaces that they do not use.