Solulab inc Interview Questions and Answers

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Q1. What is retofit?
Ans. 
Retrofit is a type-safe HTTP client for Android and Java.
• Retrofit is a popular library for making network calls in Android apps.

• It simplifies the process of sending network requests and handling responses.

• Retrofit uses annotations to define API endpoints and request parameters.

• It converts JSON response data into Java objects using Gson or other converters.
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Q2. Types of constructors
Ans. 
Constructors are special methods used to initialize objects in a class.
• Default constructor: no arguments

• Parameterized constructor: with arguments

• Copy constructor: initializes a new object as a copy of an existing object
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Q1. Explain about callbacks
Ans. 
Callbacks are functions passed as arguments to other functions to be executed at a later time.
• Callbacks are commonly used in asynchronous programming to handle tasks that take time to complete.

• They are often used in event handling, such as click events in web development.

• Callbacks can be synchronous or asynchronous, depending on when they are executed.

• An example of a callback function in JavaScript is the setTimeout fu
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Q1. How to improve core web vital?
Ans. 
Improving core web vitals involves optimizing loading speed, interactivity, and visual stability of a website.
• Optimize images and videos to reduce file sizes and improve loading speed.

• Minimize server response times by using a content delivery network (CDN).

• Implement lazy loading for images and videos to improve interactivity.

• Use CSS and JavaScript minification to reduce code bloat and improve loading speed.

• Prioritize a...read more
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Q1. Salary expectations, few basic blockchain based questions
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Q1. Basic blockchain based questions
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Asked to code a nft marketplace