BCG Software Engineering Specialist Interview Questions and Answers

Few basics of java
Dsa question

Q1. Java multithreading questions
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Q2. Spring boot questions.
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Code test on Codility

Q1. How NodeJs handles concurrency
Ans. 
NodeJs handles concurrency using event-driven, non-blocking I/O model.
• NodeJs uses event loop to handle multiple requests concurrently.

• It utilizes asynchronous functions to avoid blocking the main thread.

• NodeJs supports callbacks, promises, and async/await for managing asynchronous operations.
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Q2. Event Loop, Single Threaded
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Q1. Your day to day activities, Roles and Responsibilities
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It was a MCQ type round with 3 coding questions. This round consisted of questions from aptitude, SQL knowledge and a sql command writing question, Programming basics, Web Technology, 2 coding questions. CS Subjects and some Situational based questions.

It was a Just a minute round in which a topic was given by the interviewer to speak upon.

Q1. What all technologies you feel will be fruitful in learning with regards to your future growth?
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Q1. Explain NOSQL databases and their working?
Ans. 
NOSQL databases are non-relational databases that provide flexible schema design and horizontal scalability.
• NOSQL databases store data in key-value pairs, wide-column stores, document databases, or graph databases.

• They are designed for handling large volumes of data and are highly scalable.

• Examples include MongoDB, Cassandra, Redis, and Neo4j.
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Q1. Describe the working of your projects and how did you manage with hectic load of your curriculum being a part of your project building which is from some other domain?
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Find the greatest element in the moving array

Q1. Interviewer Asked me to build Airline Management System
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Q1. Lifecycle hooks of Angular
Ans. 
Angular lifecycle hooks are methods that allow you to tap into specific points in a component's lifecycle.
• ngOnChanges: called when an input property changes

• ngOnInit: called once the component is initialized

• ngDoCheck: called during every change detection run

• ngAfterContentInit: called after content (ng-content) has been projected into the component

• ngAfterContentChecked: called after every check of the projected content

• ng...read more
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Q2. SOLID principles
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Q1. Questions on SQL
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Q1. Introduction and basic questions
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Q1. What are services in Drupal?
Ans. 
Services in Drupal are reusable objects that perform specific functions, such as database queries or sending emails.
• Services are defined in YAML files and can be accessed throughout a Drupal site.

• They are used to encapsulate reusable functionality and promote code reusability.

• Examples of services in Drupal include the database service for interacting with the database, the mail service for sending emails, and the logge
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Q2. How to debug in Drupal?
Ans. 
Debugging in Drupal involves using tools like Devel module, watchdog(), and error logs.
• Enable Devel module for debugging information

• Use watchdog() function to log messages to Drupal's watchdog log

• Check error logs for PHP errors and warnings

• Use dpm() function to print variables for debugging purposes
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