18 real SOLID Principles questions from the Design Patterns bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.
1. What is Single Responsibility Principle?
Junior
A.the principle that clients should not be forced to depend on methods they do not use, favoring small focused contracts
B.the principle that software entities should be open for extension but closed for modification
C.the principle that a class should have only one reason to change, meaning it should do exactly one job
D.the acronym grouping five object-oriented design principles for maintainable code: single responsibility, open-closed, Liskov substitution, interface segregation, and dependency inversion
A.Single Responsibility Principle — the principle that a class should have only one reason to change, meaning it should do exactly one job
B.Single Responsibility Principle — the principle that software entities should be open for extension but closed for modification
C.Single Responsibility Principle — the principle that objects of a subtype must be replaceable for objects of their base type without breaking program correctness
D.Single Responsibility Principle — the principle that clients should not be forced to depend on methods they do not use, favoring small focused contracts
A.Open-Closed Principle — the principle that software entities should be open for extension but closed for modification
B.Open-Closed Principle — the principle that a class should have only one reason to change, meaning it should do exactly one job
C.Open-Closed Principle — the principle that objects of a subtype must be replaceable for objects of their base type without breaking program correctness
D.Open-Closed Principle — the principle that clients should not be forced to depend on methods they do not use, favoring small focused contracts
8. Which term means: "the principle that objects of a subtype must be replaceable for objects of their base type without breaking program correctness"?
A.Liskov Substitution Principle — the acronym grouping five object-oriented design principles for maintainable code: single responsibility, open-closed, Liskov substitution, interface segregation, and dependency inversion
B.Liskov Substitution Principle — the principle that objects of a subtype must be replaceable for objects of their base type without breaking program correctness
C.Liskov Substitution Principle — the principle that clients should not be forced to depend on methods they do not use, favoring small focused contracts
D.Liskov Substitution Principle — the principle that a class should have only one reason to change, meaning it should do exactly one job
A.the principle that a class should have only one reason to change, meaning it should do exactly one job
B.the acronym grouping five object-oriented design principles for maintainable code: single responsibility, open-closed, Liskov substitution, interface segregation, and dependency inversion
C.the principle that high-level modules and low-level modules should both depend on abstractions rather than on concrete details
D.the principle that clients should not be forced to depend on methods they do not use, favoring small focused contracts
A.Interface Segregation Principle — the principle that software entities should be open for extension but closed for modification
B.Interface Segregation Principle — the principle that clients should not be forced to depend on methods they do not use, favoring small focused contracts
C.Interface Segregation Principle — the acronym grouping five object-oriented design principles for maintainable code: single responsibility, open-closed, Liskov substitution, interface segregation, and dependency inversion
D.Interface Segregation Principle — the principle that objects of a subtype must be replaceable for objects of their base type without breaking program correctness
14. Which term means: "the principle that high-level modules and low-level modules should both depend on abstractions rather than on concrete details"?
A.Dependency Inversion Principle — the principle that high-level modules and low-level modules should both depend on abstractions rather than on concrete details
B.Dependency Inversion Principle — the principle that objects of a subtype must be replaceable for objects of their base type without breaking program correctness
C.Dependency Inversion Principle — the acronym grouping five object-oriented design principles for maintainable code: single responsibility, open-closed, Liskov substitution, interface segregation, and dependency inversion
D.Dependency Inversion Principle — the principle that a class should have only one reason to change, meaning it should do exactly one job
A.the principle that high-level modules and low-level modules should both depend on abstractions rather than on concrete details
B.the principle that a class should have only one reason to change, meaning it should do exactly one job
C.the principle that software entities should be open for extension but closed for modification
D.the acronym grouping five object-oriented design principles for maintainable code: single responsibility, open-closed, Liskov substitution, interface segregation, and dependency inversion
17. Which term means: "the acronym grouping five object-oriented design principles for maintainable code: single responsibility, open-closed, Liskov substitution, interface segregation, and dependency inversion"?
A.SOLID — the principle that high-level modules and low-level modules should both depend on abstractions rather than on concrete details
B.SOLID — the acronym grouping five object-oriented design principles for maintainable code: single responsibility, open-closed, Liskov substitution, interface segregation, and dependency inversion
C.SOLID — the principle that software entities should be open for extension but closed for modification
D.SOLID — the principle that objects of a subtype must be replaceable for objects of their base type without breaking program correctness
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