Forbes Technosys Senior Developer Interview Questions and Answers

Medium to Hard Questions

Q1. Basic questions from Resume
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Q1. Simple Coding Questions
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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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Q1. What are oops concepts in java, explain real time scenario
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OOPs concepts in Java include inheritance, polymorphism, encapsulation, and abstraction.
• Inheritance allows a subclass to inherit properties and methods from a superclass.

• Polymorphism allows objects to take on multiple forms and behave differently based on their context.

• Encapsulation hides the implementation details of an object and only exposes necessary information.

• Abstraction allows for the creation of abstract class...read more
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Q2. Uses of interface, inheritance
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Interfaces define contracts for behavior, while inheritance allows for code reuse and polymorphism.
• Interfaces allow for loose coupling and abstraction, enabling multiple implementations of the same behavior.

• Inheritance allows for code reuse and extension of existing classes, reducing code duplication.

• Polymorphism allows objects of different classes to be treated as if they were of the same class, simplifying code and i
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Q3. SQL query for join of tables
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SQL query for joining tables
• Use JOIN keyword to combine two or more tables based on a related column

• Specify the columns to be selected using SELECT keyword

• Use ON keyword to specify the condition for joining the tables

• Different types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL OUTER JOIN
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Q4. Java concepts used in your project
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Used Java concepts such as inheritance, polymorphism, and exception handling in my project.
• Implemented inheritance to create a base class and derived classes with specific functionalities.

• Utilized polymorphism to allow objects of different classes to be treated as if they were of the same class.

• Implemented exception handling to handle errors and prevent program crashes.

• Used interfaces to define a set of methods that a ...read more
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Q5. Overloading vs overriding, practical uses
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Overloading is having multiple methods with the same name but different parameters. Overriding is having a method in a subclass with the same name and parameters as a method in the superclass.
• Overloading is used to provide different ways to call a method with different parameters

• Overriding is used to provide a specific implementation of a method in a subclass

• Overloading is resolved at compile-time while overriding is r...read more
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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. General HR questions also a little bit about my experience
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Q1. .net general questions like ref vs out, interface vs abstract class
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Q1. What is HashMap?
Ans. 
HashMap is a data structure that stores key-value pairs and provides constant time complexity for basic operations.
• HashMap allows quick access to values based on their keys

• Keys must be unique and values can be duplicated

• HashMap is not thread-safe and requires synchronization for concurrent access

• Java's HashMap implementation uses hashing to distribute keys across buckets
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Q2. It’s a collection framework.
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