BCG Software QA Engineer 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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Basic aptitude questions. Could be done easily if practiced enough

Q1. Introduce yourself
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Q2. Array searching
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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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Q1. When have you had a conflict with someone.
Ans. 
I had a conflict with a team member over project priorities.
• Miscommunication led to conflicting priorities

• Discussed the issue openly and found a compromise

• Learned the importance of clear communication in team projects
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Q2. Tell me you greatest project
Ans. 
Developed a web-based project management tool for tracking tasks and deadlines
• Used React for front-end development

• Implemented user authentication and authorization using JWT tokens

• Utilized Node.js and Express for back-end development

• Integrated MongoDB for database storage
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Coding test was of two hours, and two difficult hard question was passed

In the group discussion, they asked the question based on the project

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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