L&T Tech Services Digital Test Engineer Interview: Rounds, Questions and Preparation

What the job involves

Test Engineers in Indian IT services validate software and hardware against requirements, write and execute test cases, log defects, and support quality assurance throughout the development lifecycle. At companies like L&T Tech Services Digital, freshers often work on manual testing, test automation, and domain-specific testing for clients in manufacturing, automotive, or telecom. The role demands attention to detail, clear documentation, and collaboration with developers and business analysts.

Role and Technical Knowledge

1. 1

   What is the difference between verification and validation in software testing?

   Explain that verification checks if the product is built correctly (reviews, inspections) while validation checks if the correct product is built (actual testing). Give a simple example like verifying a design document versus validating a login feature.

2. 2

   Explain the defect life cycle with an example.

   Cover states like New, Assigned, Open, Fixed, Retest, Closed, and Reopened. Use a scenario where a tester logs a bug, developer fixes it, and tester retests to close or reopen it.

3. 3

   What are the different levels of testing?

   List Unit, Integration, System, and Acceptance testing. Briefly state who performs each and what it focuses on, such as developers for unit and testers for system.

4. 4

   How do you decide when to stop testing?

   Mention criteria like test case execution percentage, defect density, severity of open defects, time and budget constraints, and risk analysis. Avoid saying testing stops only when all defects are fixed.

Practical Scenarios

1. 5

   You find a critical bug just before a release. What do you do?

   Show that you would immediately log it with clear steps, screenshots, and severity, inform the lead and developer, and assess impact. Discuss whether to delay release or provide a workaround based on business priority.

2. 6

   How would you test a login page for an e-commerce application?

   Cover positive and negative cases: valid and invalid credentials, blank fields, password masking, SQL injection attempts, session timeout, and forgot password flow. Mention boundary value analysis for input lengths.

3. 7

   A developer says your bug is not reproducible. How do you handle it?

   Explain that you would re-check your environment, provide detailed reproduction steps, video or screenshots, and collaborate with the developer to understand differences. If still not reproducible, mark it as such with evidence and keep monitoring.

4. 8

   How do you test an API without a user interface?

   Mention using tools like Postman or Swagger, checking status codes, response body, headers, authentication, error handling, and performance under load. Also talk about validating against API documentation.

Automation and Tools

1. 9

   What is the difference between manual and automation testing?

   Compare effort, repeatability, initial investment, and use cases. State that manual is good for exploratory and usability testing, while automation suits regression and large test suites.

2. 10

   Write a simple Selenium script to open a browser and check the title of a page.

   Use WebDriver for Java or Python, navigate to a URL, get the title, and compare with expected using an assertion. Mention driver setup and closing the browser.

3. 11

   How do you use SQL in testing?

   Explain that you write queries to verify data inserted by the application, check database constraints, and validate backend logic. Give an example like selecting a newly registered user from the users table.

4. 12

   What is the role of JIRA in testing?

   Describe how JIRA is used to log defects, track their status, link test cases, and generate reports. Mention creating a bug with steps, severity, and attachments.

Behavioural and HR

1. 13

   Tell me about a time you found a mistake that others missed.

   Use the STAR method: describe the situation, your action in reviewing or testing carefully, and the positive outcome. Highlight attention to detail and impact.

2. 14

   How do you handle pressure when multiple deadlines are close?

   Talk about prioritizing based on risk and business impact, communicating with the team, and staying organized. Give an example from college projects or internships.

3. 15

   Are you willing to relocate or work in different shifts?

   Answer honestly but show flexibility. Indian IT services often require relocation and shift work for client projects. Mention your willingness to adapt for career growth.

4. 16

   Why should we hire you as a Test Engineer?

   Connect your skills in testing fundamentals, tools, and attention to detail with the role. Mention your eagerness to learn domain knowledge and contribute to quality.