18 SOLID Principles questions from the Design Patterns bank, written for Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd.
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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
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2. Which term means: "the principle that a class should have only one reason to change, meaning it should do exactly one job"?
Junior
A.SOLID
B.Dependency Inversion Principle
C.Single Responsibility Principle
D.Interface Segregation Principle
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3. Which statement is correct?
Junior
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
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4. What is Open-Closed Principle?
Mid
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 objects of a subtype must be replaceable for objects of their base type without breaking program correctness
D.the principle that high-level modules and low-level modules should both depend on abstractions rather than on concrete details
Answer + AI explanation with Pro
5. Which term means: "the principle that software entities should be open for extension but closed for modification"?
Mid
A.Dependency Inversion Principle
B.Single Responsibility Principle
C.Liskov Substitution Principle
D.Open-Closed Principle
Answer + AI explanation with Pro
6. Which statement is correct?
Mid
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
Answer + AI explanation with Pro
7. What is Liskov Substitution Principle?
Mid
A.the principle that objects of a subtype must be replaceable for objects of their base type without breaking program correctness
B.the principle that high-level modules and low-level modules should both depend on abstractions rather than on concrete details
C.the principle that clients should not be forced to depend on methods they do not use, favoring small focused contracts
D.the principle that a class should have only one reason to change, meaning it should do exactly one job
Answer + AI explanation with Pro
8. Which term means: "the principle that objects of a subtype must be replaceable for objects of their base type without breaking program correctness"?
Mid
A.Liskov Substitution Principle
B.SOLID
C.Dependency Inversion Principle
D.Single Responsibility Principle
Answer + AI explanation with Pro
9. Which statement is correct?
Mid
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
Answer + AI explanation with Pro
10. What is Interface Segregation Principle?
Mid
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
Answer + AI explanation with Pro
11. Which term means: "the principle that clients should not be forced to depend on methods they do not use, favoring small focused contracts"?
Mid
A.SOLID
B.Open-Closed Principle
C.Single Responsibility Principle
D.Interface Segregation Principle
Answer + AI explanation with Pro
12. Which statement is correct?
Mid
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
Answer + AI explanation with Pro
13. What is Dependency Inversion Principle?
Mid
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 high-level modules and low-level modules should both depend on abstractions rather than on concrete details
C.the principle that software entities should be open for extension but closed for modification
D.the principle that a class should have only one reason to change, meaning it should do exactly one job
Answer + AI explanation with Pro
14. Which term means: "the principle that high-level modules and low-level modules should both depend on abstractions rather than on concrete details"?
Mid
A.Open-Closed Principle
B.Interface Segregation Principle
C.Dependency Inversion Principle
D.SOLID
Answer + AI explanation with Pro
15. Which statement is correct?
Mid
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
Answer + AI explanation with Pro
16. What is SOLID?
Junior
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
Answer + AI explanation with Pro
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"?
Junior
A.Interface Segregation Principle
B.Single Responsibility Principle
C.SOLID
D.Open-Closed Principle
Answer + AI explanation with Pro
18. Which statement is correct?
Junior
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
Answer + AI explanation with Pro
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