Infochord Technologies Web Developer Trainee Interview Questions and Answers

Q1. Opps concept in php
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Q2. Orm in laravel and explain
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Q3. Write SQL query for thirst highest salary from employees table
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Q1. Caching Strategy
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Q2. What is micro Frontend architecture
Ans. 
Micro Frontend architecture is an approach to building front-end applications by breaking them down into smaller, independently deployable units.
• Allows different teams to work on separate parts of the application

• Each micro frontend can be developed using different technologies

• Enables incremental upgrades and updates without affecting the entire application

• Can improve performance by loading only the necessary components

• ...read more
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Q3. Pure and impure pipes in angular
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Pure pipes in Angular are stateless and do not change the input data, while impure pipes can have side effects and change the input data.
• Pure pipes are used for simple transformations like formatting dates or numbers.

• Impure pipes are used for more complex transformations that require state or side effects.

• Pure pipes are faster and more efficient as they only run when a pure change to the input data is detected.

• Impure p...read more
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Q4. How to make singleton services multiton
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Singleton services can be made multiton by maintaining a map of instances with unique keys.
• Create a map to store instances with unique keys

• Use a factory method to retrieve instances based on keys

• Ensure that only one instance is created per key
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Q5. What is dependency injection
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Dependency injection is a design pattern where components are given their dependencies rather than creating them internally.
• Allows for easier testing by injecting mock dependencies

• Promotes loose coupling between components

• Improves code reusability and maintainability

• Examples: AngularJS, Spring Framework
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Q1. They have asked Backed related question for a ui role.
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Q2. Mostly project related question
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Q1. Javascript object manipulation based coding question
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Q2. React based verbal questions
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Q1. Difference between Var,let and const
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Var is function scoped, let and const are block scoped. Var can be redeclared and reassigned, let can be reassigned but not redeclared, const cannot be reassigned or redeclared.
• Var is function scoped

• Let and const are block scoped

• Var can be redeclared and reassigned

• Let can be reassigned but not redeclared

• Const cannot be reassigned or redeclared
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Q2. New features in Angular 10
Ans. 
Angular 10 introduces new features like stricter types, optional strict mode, and performance improvements.
• Stricter types with TypeScript 3.9

• Optional strict mode for better type checking

• Improved build times and smaller bundle sizes

• Updated dependencies like TypeScript 3.9 and TSLib 2.0
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Q1. Javascript concepts: Closure, Promise, Fetch, evening bubbling and capturing. React questions: Features of react, virtual DOM, react hooks, custom hooks.
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Q1. 1. How Virtual DOM is more efficient than real DOM. 2. Coding question: Valid parentheses 3. Usage of Event delegation. 4. Custom events. In-depth questions of JavaScript.
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Q1. Discussion of previous projects. How to handle strict deadline scenarios.
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HTML CSS javascript jQuery

It was easy- moderate in difficulty level.

Q1. The questions were purely based on python and SQL
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Q2. SQL- What are window functions and were asked to write some basic fetching queries
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