Deloitte ml engineer Interview Questions and Answers

Q1. How to write custom django admin commands
Ans. 
Custom Django admin commands can be written to perform specific tasks in the Django admin interface.
• Create a management/commands directory inside your Django app directory

• Create a Python file for your custom command inside the management/commands directory

• Define a class that extends BaseCommand and implement the handle method to execute the command logic

• Register the custom command in the Django admin interface by addin
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Q2. Python decorator
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Few basics of java
Dsa question

Q1. Java multithreading questions
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Q2. Spring boot questions.
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Q1. Tell me about yourself
Ans. 
I am a dedicated and detail-oriented Junior Engineer with a passion for problem-solving and continuous learning.
• Graduated with a degree in Engineering from XYZ University

• Completed internships at ABC Company, gaining hands-on experience in project management

• Proficient in CAD software and technical drawing
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Q2. Diagram of water treatment
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Water treatment involves a series of processes to remove impurities and make water safe for consumption.
• Water treatment typically involves processes such as coagulation, sedimentation, filtration, and disinfection.

• Coagulation involves adding chemicals to water to make particles clump together for easier removal.

• Sedimentation allows the larger particles to settle at the bottom of a tank.

• Filtration involves passing water...read more
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Q1. Personal details
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Q2. Why you want to join
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I want to join because I am passionate about engineering and eager to learn and grow in a dynamic environment.
• Passionate about engineering

• Eager to learn and grow

• Excited about working in a dynamic environment
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Q1. Technical of cloud wsdl and rest api's scecurity they aked
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Q2. Basics of integration cloud and vbcs and oracle finance module they asked
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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. .net questions, web api
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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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Mix of coding, aptitude, java, javascript

Q1. Resume based questions on project
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Q2. Basic SQL, Java streams questions
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Q1. Project related questions
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Q2. Internal working of hashmap
Ans. 
HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where the pair will be stored.

• If multiple keys hash to the same index, a collision occurs and the pairs are stored in a linked list at that index.

• To...read more
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Q3. Design patterns I've used
Ans. 
I have used design patterns such as Singleton, Factory, and Observer in my projects.
• Singleton pattern ensures a class has only one instance and provides a global point of access to it.

• Factory pattern creates objects without specifying the exact class of object that will be created.

• Observer pattern defines a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and
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Q4. Print whole Fibonacci series using recursion.
Ans. 
Print Fibonacci series using recursion
• Define a recursive function to calculate Fibonacci numbers

• Base case: return 0 if n is 0, return 1 if n is 1

• Recursive case: return sum of previous two Fibonacci numbers

• Print each Fibonacci number in the series
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Q5. Show my Github projects, and the interviewer didn't even properly looked into the code.
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