Quick study sessions to strengthen memory and retain key concepts.
How would you explain an instance variable in a Java interview?
An instance variable is a variable defined in a class, for which each instantiated object of the class…
View Card →What issue arises if a `CartItem` duplicates `Product` fields?
Data inconsistency and redundancy. Frame the concept in practical terms so you can explain it during interview discussion.…
View Card →Why do objects collaborate through method calls?
Method calls allow objects to interact and perform tasks together. Objects collaborate by calling each other's methods to…
View Card →Why does a constructor in Java matter in this design?
A constructor initializes new objects. Frame the concept in practical terms so you can explain it during interview…
View Card →How do you know object collaboration is improving?
Each object contributes one understandable part of the workflow instead of one giant method doing everything. A cleaner…
View Card →Why use method overriding for behavior specialization?
To customize behavior in subclasses. Frame the concept in practical terms so you can explain it during interview…
View Card →What role does the 'super' keyword play in method overriding?
It accesses the superclass method. Frame the concept in practical terms so you can explain it during interview…
View Card →How can method overriding lead to a compile-time error?
If the overridden method changes visibility or throws new exceptions. When overriding, you cannot reduce the visibility of…
View Card →What happens if you forget the @Override annotation?
The method may not override the intended superclass method. Forgetting the @Override annotation can lead to subtle bugs.…
View Card →How can you ensure overridden methods maintain the Liskov Substitution Principle?
Ensure the subclass methods fulfill the same contract as the superclass methods. To adhere to the Liskov Substitution…
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