TCS Interview Questions, Process, and Tips

The questions were based on ratios, percentages and profits

Simple 2 coding questions based on arrays and strings

Q1. 1.Explain your final year project
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Q2. 2.Difference between c and c++
Ans. 
C is a procedural programming language while C++ is a combination of procedural and object-oriented programming language.
• C is a procedural programming language while C++ is a combination of procedural and object-oriented programming language.

• C does not support classes and objects while C++ does.

• C does not have function overloading and namespaces like C++.

• C does not have exception handling like C++.

• C does not have refer
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Q3. 3.Write a program to find number is prime or not
Ans. 
A program to determine if a given number is prime or not.
• Iterate from 2 to the square root of the number and check if it divides the number evenly

• If any number divides the given number evenly, it is not prime

• If no number divides the given number evenly, it is prime
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General aptitude question with 2 coding problems

Q1. It consists of technical + HR round together.
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Q2. Diff between C++ and Python
Ans. 
C++ is a statically typed language with high performance, while Python is dynamically typed with simpler syntax.
• C++ is statically typed, while Python is dynamically typed

• C++ is compiled, while Python is interpreted

• C++ is better for performance-critical applications, while Python is better for rapid development

• C++ requires explicit memory management, while Python has automatic memory management

• C++ is used for system pro...read more
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Q3. How to connect mongoDB in python
Ans. 
Use pymongo library to connect mongoDB in python
• Install pymongo library using pip

• Import pymongo in your python script

• Create a MongoClient object with the connection string

• Access the database and collection using the MongoClient object
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Q4. Tell me about query optimization?
Ans. 
Query optimization is the process of improving the efficiency and performance of database queries.
• Identifying slow queries and analyzing their execution plans

• Creating appropriate indexes on tables to speed up query execution

• Rewriting queries to use efficient joins and filters

• Using query hints or optimizer hints to guide the query optimizer

• Regularly monitoring and tuning the database for optimal performance
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Q5. Diff types polymorphism.
Ans. 
Polymorphism in programming refers to the ability of a single function or method to operate on different types of data.
• Types of polymorphism include compile-time polymorphism (function overloading) and runtime polymorphism (function overriding)

• Compile-time polymorphism is achieved through method overloading, where multiple methods have the same name but different parameters

• Runtime polymorphism is achieved through metho...read more
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Q6. Family background.
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High level aptitude need 3-4 months practice

2 codes easy to medium

Q1. Technical question regarding domain
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Q2. Cv relatee questions
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Very difficult 2 question one is easy

Question is very easy

Q1. Array sorting use different approach
Ans. 
Array sorting can be done using different algorithms like bubble sort, merge sort, quick sort, etc.
• Bubble sort compares adjacent elements and swaps them if they are in the wrong order.

• Merge sort divides the array into two halves, sorts them separately, and then merges them.

• Quick sort picks a pivot element and partitions the array around the pivot.

• Example: Sorting an array of strings alphabetically using merge sort.
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Q2. What is the heap
Ans. 
The heap is a region of a computer's memory used for dynamic memory allocation.
• The heap is managed by the operating system and is separate from the stack.

• Memory allocated on the heap must be explicitly deallocated to prevent memory leaks.

• Common functions for heap memory management include malloc, calloc, realloc, and free.
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It was easy to modern questions.

Q1. Introduce yourself.
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Q2. What you know about organization.
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Q1. Hashmap working
Ans. 
HashMap is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.
• HashMap uses hashing to store and retrieve key-value pairs efficiently.

• Keys in a HashMap must be unique, but values can be duplicated.

• HashMap allows for null keys and null values.

• Example: HashMap<String, Integer> map = new HashMap<>(); map.put("apple", 5); int value = map.get("apple");
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Q2. Basic SQL query
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