Business Intelli Solutions Interview Questions and Answers

Q1. Basic css,js,reactjs questions
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Q2. Reactjs coding questions related to array, mapping
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Q3. Difference between ecma6 and ecma5
Ans. 
ECMA6 introduced new features like arrow functions, classes, and let/const declarations compared to ECMA5.
• ECMA6 introduced arrow functions for more concise syntax: const add = (a, b) => a + b;

• ECMA6 added classes for object-oriented programming: class Person { constructor(name) { this.name = name; } }

• ECMA6 introduced let/const declarations for block-scoped variables: let x = 5; const y = 10;
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Q4. Form in reactjs
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Form handling in ReactJS involves creating controlled components to manage form data and handle user input.
• Use state to manage form data and update it with user input

• Handle form submission with onSubmit event handler

• Use controlled components to ensure form data is synced with state
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Q5. Box-modal, arrow function, DOM
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Q1. What will you do if software is not working
Ans. 
I will troubleshoot the issue by identifying the root cause, checking system logs, and consulting with technical team.
• Identify the specific issue or error message

• Check system logs for any clues

• Consult with technical team for assistance

• Test different scenarios to replicate the issue
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Q2. How to deal with agressive client
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Stay calm, listen actively, set boundaries, seek support if needed
• Remain calm and composed

• Listen actively to understand their concerns

• Set clear boundaries and communicate assertively

• Seek support from a supervisor or colleague if necessary
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Q3. Are you good with excel and power point
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Q1. Will you sign 2 years bond
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Q2. Are you comfortable in travelling
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Q1. Project management Tools
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Q1. Type of projects, Impact
Ans. 
I have managed a variety of projects ranging from software development to process improvement, all with a focus on delivering impactful results.
• Managed software development projects to improve user experience and increase efficiency

• Led process improvement initiatives resulting in cost savings and streamlined operations

• Implemented new technologies to enhance project outcomes and drive innovation
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Q1. Project management cycle, situations judgement, Impact, Tools, Experience
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Q1. Experience, Availability, Interest, Etc
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Basic Aptitude test and personality test, It's easy

Q1. Code to print diagonal elements in 2d array. Reverse a string without using other empty string.
Ans. 
Print diagonal elements in a 2D array and reverse a string without using an empty string.
• Iterate through the rows and columns of the 2D array and print the elements where the row index is equal to the column index.

• Iterate through the characters of the string from the last index to the first index and append each character to a new string.
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General knowledge and logical mathematics.

Q1. 2 week training with review
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Q2. Based on your review task.
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Q1. What are oops concepts in java, explain real time scenario
Ans. 
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
Ans. 
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
Ans. 
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
Ans. 
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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Q1. Clone a Todo Application UI using ReactJS, Sass
Ans. 
Clone a Todo Application UI using ReactJS, Sass
• Create a new ReactJS project using create-react-app

• Design the UI using Sass and implement it in ReactJS

• Use state and props to manage the todo list

• Add functionality to add, delete and mark tasks as complete

• Implement local storage to persist data

• Test the application thoroughly
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Q2. Explain the order of specifity in CSS classes, elements, ids, etc
Ans. 
Explanation of CSS specificity hierarchy
• Inline styles have the highest specificity

• IDs have higher specificity than classes and elements

• Multiple selectors with the same specificity are resolved by the order in which they appear in the stylesheet

• The universal selector (*) has the lowest specificity
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This round was more focused on the problem solving. 2 coding questions were asked. The round was for an hour

Q1. How does Server-Side Rendering work?
Ans. 
Server-Side Rendering (SSR) is the process of rendering web pages on the server and sending the HTML to the client.
• SSR improves website performance and SEO by reducing load times and providing search engines with fully rendered pages.

• React provides a library called ReactDOMServer that allows developers to render React components on the server.

• SSR requires a server-side framework or library, such as Next.js or Gatsby, t...read more
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