Deloitte Software Quality Analyst 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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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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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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Q1. Why are you looking to leave
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Q2. What salary are you looking for
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Q1. Var vs let difference
Ans. 
Var is function scoped, let is block scoped in JavaScript.
• Var is function scoped, let is block scoped

• Var can be redeclared, let cannot

• Var is hoisted to the top of the function, let is not

• Use let for block-level variables, var for function-level variables
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Q2. What are different react hooks
Ans. 
React hooks are functions that let you use state and other React features in functional components.
• useState: allows functional components to have local state

• useEffect: allows side effects in functional components

• useContext: allows functional components to access context

• useReducer: alternative to useState for more complex state logic

• useMemo: memoizes the result of a function

• useCallback: memoizes a callback function

• useRe...read more
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Q1. Questions based on Java , C++ , OOPs, cloud computing, one coding question, regarding previous projects, some behavioural questions.
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