Design - Interview Questions and Answers for 'Fidelity' | Search Interview Question

Design - Interview Questions and Answers for 'Fidelity' - 6 question(s) found - Order By Newest

Very frequently asked.Usually among first few questions.

Q1. What is MVC ?

Ans. MVC is a Design Pattern that facilititates loose coupling by segregating responsibilities in a Web application

1. Controller receives the requests and handles overall control of the request
2. Model holds majority of the Business logic, and
3. View comprise of the view objects and GUI component

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Q2. What are design situations to use Singleton and Prototype Design Pattern ?

Design

Ans. Both are creational design patterns.

Singleton is used when we would like to reuse an object if object is not supposed to hold request or thread specific information. Inversely Prototype is used in situations where we would like to reuse the object information but the request / thread may require it own data to be persisted.

In short, Singleton is used in situations where we can live with single object being shared across multiple requests or threads whereas Prototype is used when we need duplicate copies of objects.

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Very Frequently asked to Senior Software Engineers or Developers.

Q3. Describe some of the Design Patterns you have used ?

Design

Ans. [Open Ended Answer]

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Q4. What is abstraction ?

Design

Ans. Abstraction is a process of hiding the implementation details and describing only the functionality to the user.

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Very frequently asked. Usually followed by questions related to private constructor and synchronized access. Frequently asked in JPMorgan and TCS (Based on 2 feedback)

Q5. Explain Singleton Design Pattern ?

Design

Ans. http://www.buggybread.com/2014/03/java-design-pattern-singleton-interview.html

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Q6. Can you explain software design principles cohesion and coupling with an example?

Design

^{This question was recently asked at 'Fidelity Information Services (FIS)'.This question is still unanswered. Can you please provide an answer.}

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