Pixel Software Engineer Interview Questions and Answers

Aptitude and technical questions were asked

Q1. Pattern question
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Q2. Doubly linked list insertion
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Q1. C++ linked lists
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Q2. Resume based, projects were asked.
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Q1. What is polymorphism?
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Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: Inheritance allows a child class to override a method from its parent class, exhibiting polymorphic b
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Q2. How abstraction is implemented?
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Abstraction is implemented in software engineering by hiding unnecessary details and exposing only relevant information.
• Abstraction is achieved through the use of abstract classes and interfaces in object-oriented programming.

• It allows developers to focus on the essential aspects of a concept without getting bogged down in implementation details.

• For example, in a car simulation program, the Car class may have abstract ...read more
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Q3. What is the difference between abstraction and Interface?
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Abstraction is hiding the implementation details while Interface is a contract that defines the methods that a class must implement.
• Abstraction focuses on hiding the internal implementation details of a class, allowing the user to only see the necessary details.

• Interface defines a contract that specifies the methods a class must implement, without providing the implementation details.

• Abstraction can be achieved through...read more
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Q1. What is your motivation when you are working on same project alone for long period?
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My motivation when working on a project alone for a long period is the satisfaction of seeing my hard work come to fruition.
• Setting small achievable goals to keep myself motivated

• Taking breaks to avoid burnout and maintain productivity

• Seeking feedback from others to stay motivated and improve my work

• Reminding myself of the end goal and the impact my project will have
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Q1. What is your salary expectation?
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My salary expectation is based on my experience, skills, and the market rate for Software Engineers in this region.
• Research the average salary range for Software Engineers in the specific region or industry

• Consider your level of experience, skills, and qualifications when determining your salary expectation

• Be prepared to negotiate based on the company's offer and benefits package
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Q1. All the questions on OOPS, Shell script, linux, c, C++, database
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Q1. Advanced questions on above areas
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Difficult questions and multiple choice questions

Q1. The difficulty of the coding round depends on the interviewer.
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Q1. Scenario based questions
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Q1. What is Observables, Services, Promises, Closure ?
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A mid-level interview will include coding questions.

Q1. Friendly technical questions and immediate response about the interview after the call.
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Write code to return the maximum profit by buying and selling stocks using available money

Q1. Explain OAuth 2.0
Ans. 
OAuth 2.0 is an authorization framework that allows third-party applications to obtain limited access to a user's account.
• OAuth 2.0 is used for delegated authorization, allowing a user to grant access to their resources without sharing their credentials.

• It uses tokens (access token, refresh token) to grant access to resources on behalf of the user.

• OAuth 2.0 is widely used in APIs, social media platforms, and other web ...read more
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Q2. Design URL Shortener
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Design a URL shortener service
• Generate a unique short code for each long URL

• Store the mapping of short code to long URL in a database

• Redirect users from short URL to long URL when accessed

• Consider implementing custom short domains for branding

• Track analytics for shortened URLs for performance monitoring
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