TCS Campus Selection interview questions in 2025
1. What is SDLC?
SDLC (Software Development Life Cycle) is a structured process used to develop software applications efficiently and with high quality. It involves several phases:
Requirement Analysis: Gathering business needs.
Planning: Defining project scope and resources.
Design: Creating architectural and detailed designs.
Development: Writing the actual code.
Testing: Checking the software for bugs.
Deployment: Releasing the software for use.
Maintenance: Providing ongoing support and updates.
2. How will you call a static method?
A static method belongs to the class, not the instance of the class.
You can call it using:
Class Name: ClassName.methodName(); (Recommended)
Object Reference: object.methodName(); (Not recommended)
public class Example {
public static void greet() {
System.out.println("Hello, World!");
}
public static void main(String[] args) {
Example.greet(); // Preferred way
}
}
3. What is CI & CD?
CI (Continuous Integration): Automates code integration from multiple developers into a shared repository. Tools like Jenkins or GitHub Actions are used.
CD (Continuous Deployment/Delivery): Automates application deployment.
Continuous Delivery: Code is ready for deployment after CI.
Continuous Deployment: Code is automatically deployed to production.
✅ Benefits: Faster development cycles, fewer bugs, and smoother releases.
4. How to update your build on Git?
Steps to update and push your changes:
git add . # Stage changes
git commit -m "Updated build files" # Commit changes
git pull origin main # Pull latest code to avoid conflicts
git push origin main # Push to repository
5. Java – How to convert String into int:
You can use:
✅ Using Integer.parseInt():
String str = "123";
int num = Integer.parseInt(str);
System.out.println(num); // Output: 123
✅ Using Integer.valueOf():
String str = "456";
int num = Integer.valueOf(str);
System.out.println(num); // Output: 456
6. Write a program for Prime Number and explain logic:
public class PrimeNumber {
public static void main(String[] args) {
int num = 29; // Number to check
boolean isPrime = true;
if (num <= 1) isPrime = false; // Numbers <=1 are not prime
for (int i = 2; i <= Math.sqrt(num); i++) {
if (num % i == 0) { // If divisible, not prime
isPrime = false;
break;
}
}
System.out.println(num + (isPrime ? " is a Prime Number." : " is not a Prime Number."));
}
}
7. Explain in detail about Software Testing Lifecycle (STLC):
STLC is a sequence of activities performed to ensure software quality.
Requirement Analysis: Understand testing needs.
Test Planning: Define scope, resources, and schedule.
Test Case Design: Create detailed test cases and scenarios.
Test Environment Setup: Prepare hardware/software for testing.
Test Execution: Run tests and report defects.
Test Closure: Analyze results, document lessons learned.
✅ Goal: Deliver bug-free and quality software.
8. Why do we use Selenium with Core Java?
- Java is popular and widely used in automation frameworks.
- Rich libraries: Java provides extensive libraries supporting Selenium.
- Fast execution: Selenium WebDriver with Java runs faster compared to some other languages.
- Strong community support: Easier to find solutions and resources.
- Cross-platform: Write once, run anywhere.
✅ Use case: Automate web application testing effectively.
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9. How to start automation?
✅ Steps to begin automation testing:
Identify test cases suitable for automation (repetitive, high-risk).
Choose the right tool (e.g., Selenium for web apps, Appium for mobile).
Set up the environment: Install tools, set up frameworks (e.g., Maven, TestNG).
Write test scripts using programming languages like Java or Python.
Execute tests and analyze results.
Integrate with CI/CD for continuous testing.
Maintain scripts as applications evolve.
✅ Tip: Start with a small, stable automation suite and expand gradually.