TCS Software Engineer Interview Questions, Process, and Tips

Q1. What is programming
Ans. 
Programming is the process of designing and building instructions for a computer to execute.
• Programming involves writing code in a specific programming language.

• It requires logical thinking and problem-solving skills.

• Examples include Java, Python, C++, and JavaScript.
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Q2. Rate your skills
Ans. 
I rate my skills as advanced in Java, proficient in Python, and experienced in SQL.
• Advanced in Java - developed multiple applications using Java

• Proficient in Python - used Python for data analysis and automation tasks

• Experienced in SQL - wrote complex queries and optimized database performance
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Q1. Jvm , java, memory alloc basics
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Q2. Database queries, index, performance
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Reasoning and english

Easy to medium dsa questions

Q1. Related to project
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Q2. Merge sort approach
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Aptitude test which contains foundation and advance sections in which foundation contains 20 Quantitative, 20 verbal and 10 Reasoning questions then advance section contains Advance Quantitative and reasoning each 10 questions and 2 codes one was easy and second was medium.

Q1. What is interface ?
Ans. 
An interface in software engineering defines a contract for how a software component should interact with other components.
• Interfaces in programming languages like Java or C# contain method signatures that must be implemented by classes that implement the interface.

• Interfaces help in achieving abstraction and loose coupling between different parts of a software system.

• Interfaces allow for polymorphism, where different ...read more
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Q2. Which is your favourite DSA algorithm?
Ans. 
My favorite DSA algorithm is Dijkstra's algorithm.
• Dijkstra's algorithm is used to find the shortest path between nodes in a graph.

• It is a popular algorithm for solving the single-source shortest path problem.

• The algorithm is commonly used in network routing protocols and GPS systems.
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Q3. What is Dynamic Programming?
Ans. 
Dynamic Programming is a method for solving complex problems by breaking them down into simpler subproblems and storing the results.
• Involves breaking down a problem into smaller subproblems

• Solves each subproblem only once and stores the result for future reference

• Uses the results of subproblems to solve the larger problem efficiently
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Q4. What is recursion ?
Ans. 
Recursion is a programming technique where a function calls itself in order to solve a problem.
• Recursion involves breaking down a problem into smaller subproblems and solving them recursively.

• Each recursive call reduces the original problem into simpler versions until a base case is reached.

• Examples of recursive algorithms include factorial calculation, Fibonacci sequence generation, and tree traversal.
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Q5. One code was given to solve which was based on string manipulation
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Q6. One SQL query to find second highest marks
Ans. 
Use a subquery to find the second highest marks in a table
• Use a subquery to select all distinct marks

• Order the marks in descending order

• Select the second highest mark using LIMIT and OFFSET
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Q7. What is Greedy algorithms and what are its types?
Ans. 
Greedy algorithms are algorithms that make the most optimal choice at each step with the hope of finding a global optimum.
• Greedy algorithms are used for optimization problems where we need to make a sequence of choices to reach a solution.

• Types of greedy algorithms include Prim's algorithm for minimum spanning tree, Dijkstra's algorithm for shortest path, and Huffman coding for data compression.

• Greedy algorithms do not...read more
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Q1. Microservices and its use
Ans. 
Microservices are a software architecture design where applications are broken down into smaller, independent services that communicate with each other through APIs.
• Microservices allow for easier scalability and maintenance of complex applications.

• Each microservice can be developed, deployed, and scaled independently.

• Microservices promote flexibility and agility in software development.

• Examples of companies using micro
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Q2. Hibernate concepts used in projects
Ans. 
Hibernate is used for ORM mapping in projects to interact with databases.
• Mapping Java classes to database tables

• Managing database connections

• Performing CRUD operations

• Implementing caching mechanisms

• Supporting transactions
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