QuyTech React Native Developer Interview Questions and Answers

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Q1. Oops dbms coding basics
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Q1. Explain the Life cycle of Mobile application?
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The mobile application life cycle includes stages from development to deployment and maintenance, ensuring optimal performance and user experience.
• 1. Development: Writing code using languages like Swift for iOS or Kotlin for Android.

• 2. Testing: Conducting unit tests, integration tests, and user acceptance tests to ensure functionality.

• 3. Deployment: Releasing the app on platforms like Google Play Store or Apple App Sto...read more
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Q2. How can we find Max and Min salary in single query?
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Use SQL's aggregate functions to find both max and min salary in a single query efficiently.
• Use the SQL query: SELECT MAX(salary) AS MaxSalary, MIN(salary) AS MinSalary FROM Employees;

• This query retrieves the highest and lowest salaries from the Employees table in one go.

• Aggregate functions like MAX() and MIN() can be used together in the SELECT statement.

• Ensure the salary column is numeric to avoid errors during aggre...read more
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Q1. What is flutter used for?
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Flutter is an open-source UI toolkit for building natively compiled applications for mobile, web, and desktop from a single codebase.
• Cross-platform development: Write once, run on iOS and Android.

• Fast development: Hot reload feature allows for quick iterations.

• Rich UI components: Provides a wide range of customizable widgets.

• Performance: Compiles to native ARM code for high performance.

• Web and desktop support: Can also...read more
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Q2. What is a widget in flutter?
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Q1. What is the process for creating a star pattern?
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Creating a star pattern involves using loops to print stars in a specific arrangement, often resembling geometric shapes.
• Determine the size of the pattern (e.g., number of rows).

• Use nested loops: an outer loop for rows and an inner loop for columns.

• For a right-angled triangle, print stars incrementally: 1 star in the first row, 2 in the second, etc.

• For a pyramid shape, center the stars by adding spaces before printing ...read more
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Q2. What is Object-Oriented Programming (OOP) in Java?
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Object-Oriented Programming (OOP) in Java is a programming paradigm based on objects that encapsulate data and behavior.
• Encapsulation: Bundling data and methods that operate on the data within one unit (class). Example: class Car { int speed; void accelerate() {...} }

• Inheritance: Mechanism to create a new class using properties of an existing class. Example: class ElectricCar extends Car {...}

• Polymorphism: Ability to p...read more
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Q1. Qs related to javascript
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Q1. Why should we hire you
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