Tesco Software Engineer Interview Questions and Answers

Q1. Java tricky question related to collections
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Q1. HLD discussion related to current project
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Q1. What is oops concepts
Ans. 
Object-oriented programming concepts that help in organizing and structuring code.
• Encapsulation: bundling data and methods together

• Inheritance: creating new classes from existing ones

• Polymorphism: using a single interface to represent different types

• Abstraction: hiding complex implementation details

• Encapsulation example: a class with private variables and public methods

• Inheritance example: a child class inheriting prop...read more
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Q2. How many types of array
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There are two types of arrays: one-dimensional and multi-dimensional.
• One-dimensional arrays are the most common type and store data in a linear sequence.

• Multi-dimensional arrays store data in a matrix-like format with rows and columns.

• Examples of one-dimensional arrays include arrays of integers, characters, and strings.

• Examples of multi-dimensional arrays include matrices and tables.

• Arrays can also be static or dynami...read more
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Q3. Indexed array, associative array, multidimensional array
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Q1. Javascript questions
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Q1. Project related questions
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Array and Linkedlist related questions

Q1. Oops concepts, DBMS, questions related to personal projects
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Q2. The ones i remember- Dbms: What is normalization? Different forms of normalization. Some joins related questions. Oops: access modifiers, abstract classes
Ans. 
Questions on DBMS and OOPs concepts
• Normalization is the process of organizing data in a database to reduce redundancy and dependency.

• Different forms of normalization include 1NF, 2NF, 3NF, BCNF, and 4NF.

• Join is used to combine rows from two or more tables based on a related column between them.

• Access modifiers in OOPs are public, private, protected, and default.

• Abstract classes are classes that cannot be instantiated a
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Q1. AWS questions, Behavioral questions
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Create some kind of system design (some kind of app)

Q1. Internals of hashset
Ans. 
HashSet is a collection that stores unique elements using a hash table.
• Uses hashing to store elements

• Does not allow duplicate elements

• Provides constant-time performance for basic operations like add, remove, contains
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Q2. Deques based questions
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Q1. Projects discussion from beginning
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Q2. How do you resolve conflicts?
Ans. 
I resolve conflicts by actively listening, understanding all perspectives, finding common ground, and proposing solutions.
• Actively listen to all parties involved

• Understand each perspective and the underlying reasons for conflict

• Find common ground and areas of agreement

• Propose solutions that address the concerns of all parties
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