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TCS System Engineer Interview Questions and Answers
750 Interview questions
Flask connects to PostgreSQL using libraries like psycopg2 and SQLAlchemy for ORM capabilities.
Use 'psycopg2' to connect: `import psycopg2; conn = psycopg2.connect(database='db', user='user', password='pass', host='localhost')`.
SQLAlchemy for ORM: `from flask_sqlalchemy import SQLAlchemy; db = SQLAlchemy(app)`.
Define models: `class User(db.Model): id = db.Column(db.Integer, primary_key=True)`.
Execute queries: `use...
The Singleton pattern ensures a class has only one instance and provides a global point of access to it.
Restricts instantiation of a class to a single object.
Useful for managing shared resources, like database connections.
Implemented using a private constructor and a static method.
Example in Java: public class Singleton { private static Singleton instance; private Singleton() {} public static Singleton getInstance...
Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.
Normalization involves dividing a database into tables and defining relationships between them.
It typically includes several normal forms (1NF, 2NF, 3NF, etc.) to eliminate redundancy.
For example, in 1NF, each column must contain atomic values, like separating first and last names into different columns.
In...
Hashtable is synchronized and thread-safe, while HashMap is not, allowing for faster performance in single-threaded scenarios.
Hashtable is synchronized, making it thread-safe; HashMap is not synchronized.
HashMap allows null keys and values; Hashtable does not allow null keys or values.
Hashtable is part of the legacy Java collection framework; HashMap is part of the Java Collections Framework.
HashMap generally perf...
What people are saying about TCS
A program to reverse a string involves swapping characters from both ends towards the center.
Use a loop to iterate through the string from both ends.
Swap characters at the start and end indices until they meet.
Example: 'hello' becomes 'olleh'.
In Python, you can use slicing: reversed_string = original_string[::-1].
Consider edge cases like empty strings or single-character strings.
OOP is a programming paradigm based on objects that encapsulate data and behavior, promoting code reusability and modularity.
Encapsulation: Bundling data and methods that operate on the data within one unit (e.g., a class).
Inheritance: Mechanism to create a new class from an existing class, inheriting attributes and methods (e.g., a 'Dog' class inheriting from an 'Animal' class).
Polymorphism: Ability to present th...
Best practices for making API calls in Python include using libraries, handling errors, and optimizing performance.
Use the 'requests' library for simplicity: `import requests`.
Handle exceptions with try-except blocks: `try: response = requests.get(url) except requests.exceptions.RequestException as e: print(e)`.
Check response status codes: `if response.status_code == 200: print(response.json())`.
Use session object...
Asking insightful questions can demonstrate your interest and understanding of the role and company culture.
What are the key responsibilities of this role? For example, how does the team prioritize tasks?
Can you describe the team structure and how collaboration works within the team?
What are the biggest challenges currently facing the team or the company?
How does the company support professional development and ca...
I am proficient in Python, with experience in scripting, automation, and data analysis across various projects.
Developed automation scripts using Python to streamline data processing tasks, reducing manual effort by 50%.
Utilized libraries like Pandas and NumPy for data analysis and manipulation in projects involving large datasets.
Created RESTful APIs using Flask to facilitate communication between front-end appli...
Salesforce is a cloud-based customer relationship management (CRM) platform that helps businesses manage customer interactions and data.
Salesforce offers a suite of applications for sales, service, marketing, and more.
It provides tools for automation, analytics, and customer engagement.
Examples include Sales Cloud for sales teams and Service Cloud for customer support.
Salesforce's AppExchange allows users to find ...
TCS System Engineer Interview Experiences
1.2k interviews found
Anonymous
Selected
I applied via Company Website and was interviewed in Dec 2024. There were 2 interview rounds.
There are two main sections: foundation and advanced. The foundation section consists of three subsections: quantitative, reasoning, and verbal. If you pass the foundation section but do not clear the advanced section, you will be considered for either the ninja role or the digital role during the interview process. The advanced section includes advanced aptitude questions and two coding questions.
(5 Questions)
- Q1. Can you provide an introduction about yourself?
- Ans.
Experienced System Engineer with a strong background in network infrastructure and cloud computing.
Over 5 years of experience in designing, implementing, and maintaining complex IT systems
Proficient in network security protocols and troubleshooting techniques
Skilled in virtualization technologies such as VMware and Hyper-V
Certified in Cisco CCNA and CompTIA Network+
Strong problem-solving and communication skills
- Q2. 3 to 4 questions based on database
- Q3. 2 easy coding questions
- Q4. Questions based on technology that I knew
- Q5. Situation based questions
Interview Preparation Tips
Selected
I appeared for an interview in Feb 2025.
(3 Questions)
- Q1. Streams api calculate second highest salary
- Ans.
The Streams API can be used to find the second highest salary from a list of employee salaries efficiently.
Use Streams: Convert the salary list to a stream using `stream()` method.
Sort and Distinct: Use `sorted()` and `distinct()` to get unique salaries in ascending order.
Skip First: Use `skip(1)` to bypass the highest salary.
Find Second: Use `findFirst()` to retrieve the second highest salary.
Example: `OptionalDouble ...
- Q2. Internal working of hashmap
- Q3. Pass by value pass by reference concept based output
- Ans.
Pass by value copies data, while pass by reference shares memory address, affecting original data differently.
Pass by Value: A copy of the variable is made. Changes do not affect the original variable.
Example: In C++, 'int a = 5; func(a);' - 'a' remains 5 after func execution.
Pass by Reference: A reference to the variable is passed. Changes affect the original variable.
Example: In C++, 'int a = 5; func(&a);' - 'a' ...
(2 Questions)
- Q1. What is current role
- Ans.
As a System Engineer, I design, implement, and maintain complex systems to ensure optimal performance and reliability.
Conduct system analysis to identify requirements and specifications.
Develop and implement system architectures, ensuring scalability and security.
Collaborate with cross-functional teams to integrate hardware and software components.
Perform troubleshooting and root cause analysis to resolve system issues...
- Q2. What is expected salary
Skills evaluated in this interview
Bhavadharani Selvaraj
I appeared for an interview in Jun 2025, where I was asked the following questions.
- Q1. Frame handling in selenium
- Ans.
Frame handling in Selenium involves switching between frames to interact with elements within them.
Use driver.switchTo().frame(index) to switch by index.
Use driver.switchTo().frame(name) to switch by frame name.
Use driver.switchTo().frame(WebElement) to switch using a WebElement reference.
Always switch back to the default content using driver.switchTo().defaultContent() after operations.
- Q2. Synchronisation used in selenium
- Ans.
Synchronization in Selenium ensures that tests run smoothly by managing timing issues between the web application and the test scripts.
Implicit Wait: Sets a default wait time for the entire session. Example: driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
Explicit Wait: Waits for a specific condition to occur before proceeding. Example: WebDriverWait wait = new WebDriverWait(driver, 10); wait.until(Expe...
Selected
I applied via TCS and was interviewed in Dec 2024. There was 1 interview round.
(6 Questions)
- Q1. What is hash technology?
- Ans.
Hash technology is a method used to convert data into a fixed-size string of characters, typically used for data security and integrity.
Hash technology uses algorithms to generate a unique fixed-size string of characters from input data.
It is commonly used for data security, password storage, digital signatures, and data integrity verification.
Examples of hash algorithms include MD5, SHA-1, and SHA-256.
- Q2. What is block chain?
- Ans.
Blockchain is a decentralized, distributed ledger technology used to securely record transactions across multiple computers.
Decentralized database
Consensus mechanism
Immutable record of transactions
Cryptographic security
Smart contracts
Examples: Bitcoin, Ethereum
- Q3. What is DML?
- Ans.
DML stands for Data Manipulation Language, used to manage data in a database.
DML is a subset of SQL (Structured Query Language) used to insert, update, delete, and retrieve data in a database.
Examples of DML commands include INSERT, UPDATE, DELETE, and SELECT.
DML is essential for managing and manipulating data within a database system.
- Q4. Convert binay to decimal and viceversa.
- Ans.
Binary to decimal conversion involves multiplying each digit by 2 raised to the power of its position.
To convert binary to decimal, start from the rightmost digit and multiply each digit by 2 raised to the power of its position.
Add all the results together to get the decimal equivalent.
For example, to convert binary 1011 to decimal: 1*2^3 + 0*2^2 + 1*2^1 + 1*2^0 = 11.
- Q5. Find max number in array?
- Ans.
Iterate through array and compare each element to find the maximum number.
Iterate through the array using a loop.
Compare each element to a variable storing the current maximum number.
Update the variable if a larger number is found.
Return the maximum number at the end.
- Q6. Write basic html , for inserting image and create table.
- Ans.
Basic HTML code for inserting image and creating a table
Use <img> tag to insert an image with src attribute
Use <table>, <tr>, <td> tags to create a table structure
Specify image source and table content within respective tags
Interview Preparation Tips
Bapan Das
(3 Questions)
- Q1. What is your real-time experience with applied coding questions?
- Q2. Advanced oops questions for data management.
- Q3. Advance database questions
(2 Questions)
- Q1. What is the reason for your job change?
- Ans.
Seeking new challenges and opportunities for growth.
Desire for new challenges and learning opportunities
Looking for career advancement
Seeking a better work-life balance
Company restructuring or downsizing
Relocation to a new area
- Q2. What is your expected salary?
- Ans.
My expected salary is based on my experience, skills, and the industry standard for System Engineers.
Consider my years of experience in the field
Research the average salary for System Engineers in the industry
Factor in the cost of living in the location of the job
Negotiate based on additional skills or certifications I bring to the role
I appeared for an interview in Dec 2024.
(2 Questions)
- Q1. All Linux commands and options
- Ans.
There are numerous Linux commands with various options for system engineers to manage and troubleshoot systems.
Commands like ls, cd, mkdir for file system operations
Commands like ps, top, htop for process management
Commands like ifconfig, ip, route for network configuration
Commands like grep, sed, awk for text processing
Options like -r for recursive, -f for force, -l for long listing
- Q2. How to configure NFS, NTP,DNS servers
- Ans.
To configure NFS, NTP, and DNS servers, you need to edit configuration files and restart the respective services.
Edit /etc/exports file for NFS server configuration
Edit /etc/ntp.conf file for NTP server configuration
Edit /etc/named.conf file for DNS server configuration
Restart nfs, ntp, and named services after making changes
(2 Questions)
- Q1. Linux Patch Management
- Q2. Linux servers updates
(1 Question)
- Q1. Why you want to join TCS
- Ans.
I want to join TCS because of its reputation for innovation and growth opportunities.
TCS is known for its cutting-edge technology solutions
I am impressed by TCS's commitment to employee development
I believe TCS will provide me with a challenging and rewarding work environment
I applied via Naukri.com and was interviewed in Dec 2024. There were 2 interview rounds.
(3 Questions)
- Q1. Technical based
- Q2. What is different between workgroup and domain
- Ans.
Workgroup is a peer-to-peer network where each computer has its own security settings, while a domain is a centralized network managed by a server with shared security settings.
Workgroup is decentralized, each computer manages its own security settings
Domain is centralized, managed by a server with shared security settings
Workgroup is suitable for small networks, domain is suitable for larger networks
In a workgroup, us...
- Q3. What should a system administrator`s routine be?
- Ans.
A system administrator's routine involves monitoring system performance, troubleshooting issues, implementing security measures, and maintaining backups.
Regularly monitoring system performance and resource usage
Troubleshooting and resolving technical issues as they arise
Implementing and maintaining security measures to protect the system from cyber threats
Performing regular backups and ensuring data integrity
Updating s...
(1 Question)
- Q1. Dsfsdf sdfsd sdf sd f
Interview Preparation Tips
Akash Ghadage
Selected
Aptitude tests typically assess quantitative skills and reasoning abilities.
Two programming questions: the first is easy, and the second is medium.
(2 Questions)
- Q1. Can you describe your background and experience? What can you share about your project-related experiences?
- Ans.
I have a strong background in system engineering with experience in various projects.
Bachelor's degree in Computer Science with a focus on system engineering
Worked on implementing and maintaining network infrastructure for a large corporation
Experience with virtualization technologies such as VMware and Hyper-V
Managed projects involving system upgrades and migrations
Certified in Cisco networking and Microsoft server te...
- Q2. What is your understanding of Java Object-Oriented Programming (OOP)?
- Ans.
Java OOP is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
Java OOP involves the use of classes and objects.
Encapsulation is a key concept where data is kept private within a class and accessed through public methods.
Inheritance allows one class to inherit attributes and methods from another class.
Polymorphism enables objects to be...
Interview Preparation Tips
Mohammed Thalha
It contains Verbal Ability, Logical Reasoning, Puzzles, Numerical Ability, and programming round in aptitude test programming contains 2 questions 1 is beginner to intermediate, 2nd question is intermediate to master level. (Any programming language)
(2 Questions)
- Q1. Tell me about your self
- Ans.
I am a dedicated and experienced System Engineer with a strong background in network infrastructure and troubleshooting.
Over 5 years of experience in designing, implementing, and maintaining complex systems
Proficient in various operating systems such as Windows, Linux, and Unix
Skilled in network security, virtualization, and cloud computing
Certified in Cisco CCNA and CompTIA Network+
Strong problem-solving and communica...
- Q2. Asked questions from my resume, I'm fresher while applying so most of the questions I got from my projects.
(4 Questions)
- Q1. Tell me about your self
- Ans.
I am a dedicated and experienced System Engineer with a strong background in network infrastructure and troubleshooting.
Over 5 years of experience in designing, implementing, and maintaining network systems
Proficient in various operating systems such as Windows, Linux, and Unix
Skilled in troubleshooting network issues and providing timely solutions
Certified in Cisco CCNA and CompTIA Network+
Strong communication and tea...
- Q2. What is your strength?
- Ans.
My strengths include problem-solving skills, attention to detail, and strong technical knowledge.
Strong problem-solving skills - I am able to analyze complex issues and come up with effective solutions.
Attention to detail - I pay close attention to the specifics of a project to ensure accuracy and quality.
Strong technical knowledge - I have a solid understanding of various systems and technologies, allowing me to troub...
- Q3. What is your weakness?
- Ans.
My greatest weakness is that I tend to be overly critical of my own work.
I have a tendency to spend too much time perfecting a project, which can sometimes lead to delays in completion.
I am working on improving my ability to delegate tasks and trust others to take on more responsibility.
I have been actively seeking feedback from colleagues to help me gain perspective on my work and make necessary improvements.
- Q4. Tell me about your knowledge in organization
- Ans.
I have strong knowledge in organization, including project management, time management, and resource allocation.
Experience in creating project plans and timelines
Ability to prioritize tasks and manage deadlines effectively
Skilled in allocating resources efficiently to meet project goals
Familiarity with tools and techniques for organizing and tracking project progress
Strong communication skills to coordinate with team m...
Interview Preparation Tips
Selected
I appeared for an interview before Jul 2024, where I was asked the following questions.
- Q1. What is orm?
- Ans.
ORM (Object-Relational Mapping) is a programming technique for converting data between incompatible type systems using object-oriented programming.
ORM allows developers to interact with a database using high-level programming languages instead of SQL.
Examples of ORM frameworks include Hibernate (Java), Entity Framework (.NET), and Django ORM (Python).
It simplifies database operations by allowing developers to use objec...
- Q2. What are functions you have used in flask to connect with postgres
- Ans.
Flask connects to PostgreSQL using libraries like psycopg2 and SQLAlchemy for ORM capabilities.
Use 'psycopg2' to connect: `import psycopg2; conn = psycopg2.connect(database='db', user='user', password='pass', host='localhost')`.
SQLAlchemy for ORM: `from flask_sqlalchemy import SQLAlchemy; db = SQLAlchemy(app)`.
Define models: `class User(db.Model): id = db.Column(db.Integer, primary_key=True)`.
Execute queries: `users = ...
TCS Interview FAQs
Some of the top questions asked at the TCS System Engineer interview -
The duration of TCS System Engineer interview process can vary, but typically it takes about less than 2 weeks to complete.
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TCS Interviews By Designations
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