Computer Science Interview Questions and Answers
Ques 26. Explain the concept of the DRY principle in software development.
DRY (Don't Repeat Yourself) is a software development principle that encourages the elimination of redundancy by using abstractions such as functions, classes, or modules.
Example:
Refactoring repeated code into a function for reusability.
Ques 27. What is the purpose of the 'ORM' (Object-Relational Mapping) in database development?
ORM is a programming technique that maps objects to database tables, allowing developers to interact with databases using object-oriented programming languages.
Example:
Using Hibernate in Java to map Java objects to database tables.
Ques 28. Explain the concept of a neural network in machine learning.
A neural network is a computational model inspired by the structure and functioning of the human brain, used for tasks such as pattern recognition and decision-making.
Example:
Training a neural network to recognize handwritten digits in an image.
Ques 29. What is the purpose of the 'volatile' keyword in programming?
'volatile' is used to indicate that a variable's value may be changed by multiple threads simultaneously, preventing compiler optimizations that assume the variable can only be changed by the current thread.
Example:
Declaring a variable as 'volatile' in Java for thread safety.
Ques 30. Explain the concept of microservices in software architecture.
Microservices is an architectural style that structures an application as a collection of small, loosely coupled services, each independently deployable and scalable.
Example:
Building a large-scale web application with independent services for authentication, payment, and user management.
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