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TCS System Engineer Interview Questions and Answers
728 Interview questions
OOP concepts like encapsulation, inheritance, and polymorphism can be illustrated through real-life examples for better understanding.
Encapsulation: A car's engine is encapsulated; users interact with the dashboard without needing to understand the engine's complexity.
Inheritance: A 'Dog' class can inherit properties from an 'Animal' class, sharing traits like 'bark' and 'eat'.
Polymorphism: A 'Shape' class can hav...
SQL queries are structured commands used to interact with relational databases, enabling data retrieval, manipulation, and management.
SQL stands for Structured Query Language, used for managing relational databases.
Common SQL operations include SELECT (to retrieve data), INSERT (to add data), UPDATE (to modify data), and DELETE (to remove data).
Example of a SELECT query: SELECT * FROM employees WHERE department = ...
CRM systems manage customer relationships, streamline processes, and enhance communication to improve business relationships.
Centralizes customer data for easy access and management.
Tracks customer interactions and history for personalized service.
Automates marketing campaigns, like email newsletters.
Facilitates sales tracking and forecasting, e.g., pipeline management.
Enhances customer support with ticketing syst...
IP stands for Internet Protocol, a set of rules governing data transmission over networks.
IP addresses are unique identifiers for devices on a network, e.g., 192.168.1.1.
There are two main versions: IPv4 (32-bit) and IPv6 (128-bit).
IP is responsible for routing packets of data between devices.
It operates at the network layer of the OSI model.
IP can be static (fixed) or dynamic (assigned by DHCP).
What people are saying about TCS
POM and Page Factory are design patterns in Selenium for enhancing test automation efficiency and maintainability.
POM (Page Object Model) separates test code from UI interactions, promoting reusability.
Page Factory is an extension of POM that uses annotations to initialize web elements.
Example of POM: Create a class for each page with methods for actions (e.g., login).
Example of Page Factory: Use @FindBy annotatio...
Securing Spring Boot applications involves implementing various security measures to protect against vulnerabilities.
Use Spring Security for authentication and authorization.
Implement HTTPS to encrypt data in transit.
Validate user inputs to prevent SQL injection and XSS attacks.
Use JWT (JSON Web Tokens) for stateless authentication.
Regularly update dependencies to patch known vulnerabilities.
Configure CORS (Cross-...
A Singleton class restricts instantiation to a single instance, providing a global point of access to that instance.
Ensures only one instance exists throughout the application.
Provides a global access point to that instance.
Commonly used in logging, configuration settings, and thread pools.
Example in Java: 'public class Singleton { private static Singleton instance; private Singleton() {} public static Singleton g...
This Java 8 program identifies and returns characters from a string that appear only once.
Use a Map to count occurrences of each character.
Filter the characters to find those with a count of 1.
Example: For 'google', the output should be 'l'.
Checked exceptions are checked at compile-time, while unchecked exceptions are checked at runtime in Java.
Checked exceptions must be either caught or declared in the method signature using 'throws'. Example: IOException.
Unchecked exceptions do not need to be explicitly handled. Example: NullPointerException.
Checked exceptions are subclasses of Exception but not of RuntimeException.
Unchecked exceptions are subclass...
In Java, 'throw' is used to explicitly throw an exception, while 'throws' declares exceptions that may be thrown by a method.
throw: Used to throw an exception explicitly. Example: throw new NullPointerException();
throws: Used in method signatures to declare exceptions that can be thrown. Example: public void myMethod() throws IOException {}
throw can be used anywhere in the method body, while throws is used in the ...
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
- Ans.
A HashMap in Java uses a hash table to store key-value pairs, allowing for efficient data retrieval and storage.
1. HashMap stores data in key-value pairs, where each key is unique.
2. It uses an array of buckets to store the entries, where each bucket can hold multiple entries in case of collisions.
3. The hash function computes an index based on the key's hash code, determining where to store the entry.
4. When a collisi...
- 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
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 May 2025, where I was asked the following questions.
- Q1. Oops concepts with real life example
- Ans.
OOP concepts like encapsulation, inheritance, and polymorphism can be illustrated through real-life examples for better understanding.
Encapsulation: A car's engine is encapsulated; users interact with the dashboard without needing to understand the engine's complexity.
Inheritance: A 'Dog' class can inherit properties from an 'Animal' class, sharing traits like 'bark' and 'eat'.
Polymorphism: A 'Shape' class can have met...
- Q2. Q related to c language and sdlc
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
(2 Questions)
- Q1. Technical about OTC cycle
- Q2. Questions on your previous work
(2 Questions)
- Q1. Salary discussed
- Q2. Joining date discussed
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 System Engineer Reviews and Ratings
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