Tesco Software Developer Intern Interview Questions and Answers

Q1. How indexing works internally?
Ans. 
Indexing in databases is a way to optimize search queries by creating a data structure that allows for faster retrieval of data.
• Indexing creates a data structure (like B-trees or hash tables) that maps keys to the locations of corresponding data entries.

• When a query is made, the database engine uses the index to quickly locate the relevant data entries instead of scanning the entire database.

• Indexes can be created on o...read more
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Q1. Intoduce yourself
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I am a passionate software developer with experience in Java, Python, and web development.
• Experienced in Java and Python programming languages

• Proficient in web development technologies such as HTML, CSS, and JavaScript

• Strong problem-solving skills and ability to work in a team environment
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Q2. Your Projects
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Developed a web application for tracking personal fitness goals
• Used React.js for front-end development

• Implemented RESTful APIs for data retrieval and storage

• Utilized MongoDB for database management
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The assessment consisted of an online round lasting one hour, during which there were 33 questions, all of which were challenging, including the multiple-choice questions. The questions were divided into six subsections: 1. Data Structures and Algorithms (DSA) - with a problem related to dynamic programming or recursion; 2. Java; 3. Java 8; 4. Spring; 5. Spring Boot; 6. Microservices.

3 sum problem was asked to complete

Take home project to design app

Q1. .net core framework, .net core MVC, Vue js , js , SQL
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Q1. .net core question
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Q2. .net mvc questions
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Q3. Authentication in .net
Ans. 
Authentication in .NET involves verifying the identity of users accessing a system.
• Use ASP.NET Identity for user authentication and authorization

• Implement OAuth for secure authentication with third-party services

• Utilize JWT tokens for stateless authentication

• Implement multi-factor authentication for added security
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Q4. About your project architecture
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Q5. Sql related questions
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Q6. Entity framework
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Q1. Array, Tree based questions
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Q1. Managerial round with a dive into the projects
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Q1. Laravel based questions
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Q1. Basic questions
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Q1. What is garbage collector in python
Ans. 
Garbage collector in Python is a built-in feature that automatically manages memory by reclaiming unused memory space.
• Garbage collector in Python helps in automatically deallocating memory of objects that are no longer in use.

• It prevents memory leaks by freeing up memory that is no longer needed.

• Python's garbage collector uses reference counting and a cycle-detecting algorithm to manage memory efficiently.
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Q1. What is pointer
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A pointer is a variable that stores the memory address of another variable.
• Pointers are used to access and manipulate memory directly.

• They are commonly used in programming languages like C and C++.

• Example: int *ptr; // declares a pointer variable ptr that can store the memory address of an integer
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