TCS Assistant System Engineer Interview Questions, Process, and Tips

20 questions-easy to moderate

5 questions-basic to intermediate

It was an online written exam. There were 4 sections:- aptitude, verbal, reasoning, and hands on coding.

In verbal there were comprehension questions.
There were 2 coding questions, we can write the code in C, Python, Java or C#

Q1. Given a maximum of 100 digit numbers as input, find the difference between the sum of odd and even position digits
Ans. 
Find the difference between the sum of odd and even position digits in a maximum of 100 digit number.
• Iterate through the digits of the number and add the digits at odd positions to a variable for odd position digits and even positions to a variable for even position digits.

• Calculate the difference between the two variables.

• Return the difference.

• Example: For the number 123456, the sum of digits at odd positions is 1+3+5...read more
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Round duration - 45 minutes
Round difficulty - null
I got an email for the TR interview a day before the interview. It was conducted on MS Teams. The interviewer asked to write syntax. She asked some basic questions on Electronics as wekk.

Q1. What is ASCII?
Ans. 
ASCII stands for American Standard Code for Information Interchange. It is a character encoding standard used to represent text in computers.
• ASCII is a 7-bit character set that includes 128 characters.

• Each character is represented by a unique numeric code.

• ASCII codes are used to represent characters in computer systems and communication protocols.

• Common ASCII codes include 65 for 'A', 97 for 'a', and 48 for '0'.
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Q2. What are strings?
Ans. 
Strings are arrays of characters used to represent text in programming languages.
• Strings are a data type in programming languages.

• They are typically enclosed in quotation marks.

• Strings can contain letters, numbers, symbols, and spaces.

• They can be concatenated or manipulated using various string operations.

• Examples: 'Hello, World!', '12345', 'This is a string.'
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Q3. What are the features of C?
Ans. 
C is a high-level programming language known for its efficiency and portability.
• C is a compiled language

• It has a rich set of operators and data types

• It supports both procedural and object-oriented programming

• C is widely used in system programming, embedded systems, and game development

• Examples of C-based software include the Linux kernel, MySQL, and Adobe Photoshop
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Q4. What are loops? What is if, else and while loop?
Ans. 
Loops are used to repeat a set of instructions. If, else and while loops are conditional statements used in programming.
• If statement is used to execute a block of code if a condition is true.

• Else statement is used to execute a block of code if the same condition is false.

• While loop is used to execute a block of code repeatedly as long as a condition is true.

• For loop is used to execute a block of code a specific number
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Q5. What is method overloading and method overriding?
Ans. 
Method overloading is creating multiple methods with the same name but different parameters. Method overriding is creating a new implementation of an existing method in a subclass.
• Method overloading is used to provide different ways of calling a method with different parameters.

• Method overriding is used to change the behavior of an existing method in a subclass.

• Method overloading is resolved at compile-time based on th...read more
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Q6. What is type casting?
Ans. 
Type casting is the process of converting a variable from one data type to another.
• It is also known as type conversion.

• It can be done implicitly or explicitly.

• Explicit type casting is done using casting operators.

• Examples of casting operators include (int), (float), and (char).

• Type casting can lead to loss of data if the target data type cannot hold the original value.
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Q7. Difference between if and while loop.
Ans. 
If loop is used for conditional execution while while loop is used for repetitive execution.
• If loop executes the code block only if the condition is true.

• While loop executes the code block repeatedly as long as the condition is true.

• If loop is used for decision-making while while loop is used for iteration.

• Example of if loop: if (x > 5) { // do something }

• Example of while loop: while (x < 10) { // do something }
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Q8. What is the difference between unions and joins? What is the difference between primary and unique keys?
Ans. 
Unions and joins are used to combine data from multiple tables. Primary keys are unique identifiers for a table, while unique keys ensure uniqueness of a column.
• Unions combine data from two or more tables into a single result set, while joins combine data from two or more tables based on a common column.

• Primary keys are used to uniquely identify each row in a table and cannot contain null values. Unique keys ensure tha...read more
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Q9. What is the difference between sql and mysql
Ans. 
SQL is a language used to manage relational databases, while MySQL is a specific relational database management system.
• SQL is a language used to manage relational databases, while MySQL is a specific implementation of a relational database management system.

• SQL is a standard language used across different database management systems, while MySQL is a specific product developed by Oracle Corporation.

• MySQL is an open-sou...read more
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Q10. Write a query to delete a row. Write a syntax to convert if loop to while loo
Ans. 
Answering a query to delete a row and converting if loop to while loop.
• To delete a row, use the DELETE statement with the WHERE clause to specify the row to be deleted.

• Syntax: DELETE FROM table_name WHERE condition;

• To convert an if loop to while loop, replace the if statement with a while loop and add a condition to exit the loop.

• Example: if (condition) { // code } can be converted to while (condition) { // code }
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Q1. Who is the CEO of tcs?
Ans. 
The CEO of TCS is Rajesh Gopinathan.
• Rajesh Gopinathan became the CEO of TCS in 2017.

• He has been with TCS since 2001 and has held various leadership positions.

• Under his leadership, TCS has continued to grow and expand globally.

• Gopinathan has a degree in electrical and electronics engineering from the National Institute of Technology, Tiruchirappalli.

• He is also a member of the Institute of Electrical and Electronics Engi
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Q2. Difference between service based and product based company?
Ans. 
Service-based companies provide services to clients while product-based companies sell products to customers.
• Service-based companies focus on providing services to clients, such as consulting, outsourcing, and support services.

• Product-based companies focus on selling products to customers, such as software, hardware, and consumer goods.

• Service-based companies typically have a more flexible business model and may have a...read more
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Q3. Did you fail in your life? How is your experience?
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Q4. Did you participate in any program offered by tcs like codevita etc..?
Ans. 
Yes, I have participated in TCS CodeVita.
• I participated in TCS CodeVita in 2020 and 2021.

• I was able to solve several coding problems during the competition.

• Participating in CodeVita helped me improve my coding skills and problem-solving abilities.
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Q5. Relocation and service agreement?
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Prepare thoroughly all the topics

Q1. Should have basic knowledge of DBMS oops
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Q2. Whata are the pillars of oops
Ans. 
The pillars of OOPs are Abstraction, Encapsulation, Inheritance, and Polymorphism.
• Abstraction: Hiding implementation details and showing only necessary information.

• Encapsulation: Binding data and functions together and restricting access to them.

• Inheritance: Creating new classes from existing ones, inheriting properties and methods.

• Polymorphism: Ability of objects to take on multiple forms or behaviors.
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Q3. Tell me about yourself , are you willing to relocate
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Q1. Python version compatibility
Ans. 
Python versions are backward compatible, meaning code written in older versions should work in newer versions.
• Python versions are backward compatible, meaning code written in older versions should work in newer versions.

• It is recommended to use the latest stable version of Python for development.

• Some libraries and frameworks may not be compatible with older versions of Python.

• For example, Python 2.x is no longer suppor...read more
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