eXEGESIS Infotech SQL Developer Interview Questions and Answers

Q1. What is observable and promises
Ans. 
Observables and promises are both used for handling asynchronous operations in JavaScript.
• Observables are used for handling multiple values over time, while promises are used for handling a single value at a time.

• Observables can be cancelled, while promises cannot be cancelled.

• Promises have a built-in mechanism for error handling using the catch method, while observables use the error callback function.

• Observables are ...read more
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Write a code for unique array

Object of array to array of objects

Q1. How will you communicate with the client?
Ans. 
I will communicate with the client through regular meetings, emails, phone calls, and project updates.
• Schedule regular meetings to discuss project progress and updates

• Send detailed emails outlining any changes or updates

• Provide frequent phone calls for quick updates or clarifications

• Share project updates through project management tools like Jira or Trello
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Javascript & Angular question -
1. Write piece of code to display the array item using iteration method?
2. Write piece of code for API integration using services ?
3. What is the method of data transferring in Angular Components ?
4. What is Routing ?

Q1. Angular Question 1. What is the difference between Angular 8 and Angular 12 version ? 2. What is Call Back Function ? 3. What is Life Cycle Hooks ? 4. How to handle large data transferring from Backend ?
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Q1. Basics of ReactJS and JavaScript
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Q2. Basic JavaScript question, Basic Framework/Library questions.
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Q1. This is a Managerial round asking about basics pertaining to your expertise
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Q1. For the UI role, they gave me some basic javascript code snippets and asked me to predict the output.
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Q2. Questions related to how you think of solving a problem in multiple ways
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Q1. What is Solid principle ?
Ans. 
SOLID is a set of principles for object-oriented programming to make software more maintainable, scalable, and robust.
• S - Single Responsibility Principle

• O - Open-Closed Principle

• L - Liskov Substitution Principle

• I - Interface Segregation Principle

• D - Dependency Inversion Principle
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Q2. Explain dependency injection
Ans. 
Dependency injection is a design pattern used to remove hard-coded dependencies and make code more modular and testable.
• Dependencies are provided to a class rather than being created within the class

• This allows for easier testing and swapping of dependencies

• Commonly used in frameworks like Spring and Angular

• Example: Instead of creating a database connection within a class, the connection is provided to the class throug
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