ALDI Information Technology Intern Interview Questions and Answers

Q1. React hooks, Explain using code
Ans. 
React hooks are functions that let you use state and other React features without writing a class.
• Hooks are functions that let you use state and other React features in functional components

• useState() is a hook that allows you to add state to functional components

• useEffect() is a hook that allows you to perform side effects in functional components

• useContext() is a hook that allows you to use the context API in functio
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Q2. Factory Patterns?
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Q3. Liskov Substitution Principle
Ans. 
Liskov Substitution Principle states that objects of a superclass should be replaceable with objects of its subclasses without affecting the program's correctness.
• Subtypes must be substitutable for their base types.

• Derived classes must be able to replace their base classes without affecting the program's behavior.

• Violating this principle can lead to unexpected behavior and errors in the code.

• Example: If a program expec...read more
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Q4. Oops Concept and give examples
Ans. 
Oops concept is a programming paradigm that focuses on objects and classes.
• Oops stands for Object-Oriented Programming

• Key concepts include inheritance, encapsulation, polymorphism, and abstraction

• Examples: Class Car with properties like make, model, and methods like start(), stop()

• Example: Inheritance - Class SUV extends Car and adds property numSeats
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Q5. JQuery - Ajax mechanisms
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Q6. Docker and Kubernetes - Azure concepts
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Q1. Previous Experience
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Q2. Design Knowledge
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Q3. Personally Based
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Q1. Domain Knowledge Formal Testing
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Q2. Lab Management Quality Assurance Design Assurance
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Q3. Dv, TMV R&D Testing Mechanical
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Q1. Salary Negotiation
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Basic coding questions related to javascript or Java

Specific to your skills, for FE web development angular related questions.

Q1. Normal salary negotiation
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Q1. What is the iterator, generator in python. Write an example of it. What is .pyc file, when is it generate, generate and show it.
Ans. 
Iterator and generator are used in Python to iterate over a sequence of elements. .pyc files are compiled Python files.
• Iterator in Python is an object that enables a programmer to traverse a container, like a list.

• Generator in Python is a function that returns an iterator. It generates values using the yield keyword.

• Example of iterator: for num in range(5): print(num)

• Example of generator: def square_numbers(n): for i i...read more
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Q2. Coding Questions: 1) Reversing a number eg:1234 to 4321 2) Perform sorting in list using any sort algorithm 3) list1, list2 - both are mapped to each other, based on the traget value in list1, return th...read more
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Q3. Technical questions : OS module, .pyc file, git commands,
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Q4. What is bug life cycle? which project management methodolgy are you following in your current project.
Ans. 
Bug life cycle is the process of identifying, reporting, fixing, retesting, and closing bugs in a software project.
• Bug is identified by a tester during testing phase

• Bug is reported to the development team

• Development team fixes the bug

• Tester retests the bug to ensure it is fixed

• Bug is closed once confirmed fixed
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Q5. Questions on OOPS . What is polymorphism, write an example for that . Why do we use OOP's
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Q1. Technical questions based on my resume, coding, project architect, etc.
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Q1. System design round. LLD and HLD.
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Q1. Managerial with a little bit of technical. Work ethics, vision and ctc expectations.
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Q1. Compensation discussion.
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Simple aarray problems

Q1. Multi threading concepts
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Q2. Java concepts with some code to finished
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Round duration - 60 minutes
Round difficulty - Medium

This was a technical Interview round with questions on C#, .NET and DBMS.

Q1. What is the difference between the Ref and Out keywords in C#?
Ans. 
Ref is used for passing arguments by reference, Out is used for returning multiple values.
• Ref keyword is used for passing arguments by reference, allowing the method to modify the original value.

• Out keyword is used for returning multiple values from a method, as it does not require the variable to be initialized before being passed.
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Q2. What is the difference between ViewData, ViewBag, and TempData in C#?
Ans. 
ViewData, ViewBag, and TempData are ways to pass data between controllers and views in ASP.NET MVC.
• ViewData is a dictionary object used to pass data from controller to view. It requires typecasting.

• ViewBag is a dynamic property used to pass data from controller to view. No typecasting is required.

• TempData is a dictionary object used to pass data from one controller to another or from one action to another.
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Q3. What is the difference between managed and unmanaged code in C#?
Ans. 
Managed code is executed by the CLR with memory management, while unmanaged code is executed directly by the operating system without memory management.
• Managed code is executed by the Common Language Runtime (CLR) in .NET framework.

• Unmanaged code is executed directly by the operating system without CLR.

• Managed code provides automatic memory management through garbage collection.

• Unmanaged code requires manual memory man...read more
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Q4. What are the different types of triggers in SQL Server?
Ans. 
Triggers in SQL Server are special types of stored procedures that are automatically executed when certain events occur in a database.
• Types of triggers include DML triggers (for INSERT, UPDATE, DELETE operations), DDL triggers (for CREATE, ALTER, DROP operations), and Logon triggers.

• Triggers can be set to fire before or after the triggering event.

• Examples of triggers include auditing changes to a table using an INSERT ...read more
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Q5. What are generic and non-generic collections in C#?
Ans. 
Generic collections in C# allow for type-safe collections, while non-generic collections do not enforce type safety.
• Generic collections use type parameters to specify the type of elements they can contain, ensuring type safety.

• Non-generic collections do not specify the type of elements they can contain, leading to potential runtime errors if incorrect types are used.

• Example of generic collection: List<string> nam...read more
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Round duration - 30 minutes
Round difficulty - Easy

This was a typical managerial round.