Newt Global Senior Software Developer Interview Questions and Answers

Q1. Describe Life cycle in react
Ans. 
React has three main phases in its lifecycle: mounting, updating, and unmounting.
• Mounting: when a component is created and inserted into the DOM

• Updating: when a component is updated due to changes in props or state

• Unmounting: when a component is removed from the DOM

• Lifecycle methods can be used to perform actions at each phase, such as componentDidMount() or componentWillUnmount()

• React also has error handling methods,
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Q2. Explain strict mode in javascript and it's use
Ans. 
Strict mode is a way to write secure and optimized JavaScript code.
• Enables catching of silent errors

• Disallows duplicate property names or parameters

• Prevents use of undeclared variables

• Makes `eval()` safer to use

• Throws errors on invalid usage of `this` keyword
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CURD operations along with implementation of a mock UI

Q1. Tell about Oops concepts
Ans. 
OOPs concepts are fundamental principles in object-oriented programming, including inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex imple...read more
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Q1. Will ask coding related
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Q1. What is Expected salary
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Q1. Basics .net , c#, sql
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Q1. Current Project Details, Roles and some technical questions too
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Q1. Package Discussion and Other basic details
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Q1. More about API automation
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Q1. Action Filters In MVC
Ans. 
Action filters are used in ASP.NET MVC to execute code before or after an action method is called.
• Action filters can be used to perform authentication and authorization checks.

• They can also be used to modify the result of an action method.

• Examples of action filters include Authorize, OutputCache, and HandleError.

• Action filters can be applied globally, to a controller, or to an individual action method.
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Q2. What is the difference between controller and API controller
Ans. 
A controller is used for handling user requests while an API controller is used for handling API requests.
• A controller is used for rendering views while an API controller is used for returning data in JSON format.

• API controllers are usually lighter and faster than regular controllers.

• API controllers are often used for building RESTful APIs.

• Examples of API frameworks that use API controllers include Laravel and ASP.NET
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Q1. Difference between IEnumerable and IQuriable
Ans. 
IEnumerable is read-only and forward-only while IQueryable is queryable and can be used with LINQ to SQL.
• IEnumerable is used for in-memory collections while IQueryable is used for querying external data sources.

• IQueryable allows for deferred execution while IEnumerable does not.

• IQueryable can be used with LINQ to SQL to translate queries into SQL statements.

• IEnumerable is simpler and more lightweight than IQueryable.

• IE...read more
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Q2. What is the use of Yield Key word
Ans. 
Yield keyword is used in Python to create generators that can be used to iterate over large datasets without loading them into memory.
• Yield is used to pause and resume a function's execution.

• Generators created using yield are memory efficient as they only load data when needed.

• Yield can be used to implement lazy evaluation.

• Yield can be used to create infinite sequences.

• Example: def my_generator(): yield 1; yield 2; yie...read more
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Q1. Basics Oops concepts and SQL queries along with currently working projects stacks
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Q1. More in-depth technical questions use of reflections etc
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Q1. Usual HR interviews company values etc
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Q1. Find the index of second maximum interger in a given array.
Ans. 
Find the index of second maximum integer in a given array.
• Iterate through the array to find the maximum integer.

• Then iterate again to find the second maximum integer and return its index.
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They ask normal leetcode question