TNQ Tech Private Limited Software Engineer Interview Questions and Answers

Q1. Test strategies
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Q2. Which level of testing is more focussed
Ans. 
Unit testing is more focused
• Unit testing focuses on testing individual components or functions in isolation

• It is typically automated and executed frequently during development

• Examples include testing a specific function in a program or a specific module in an application
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Hsd to design a simple product cart application

It was a phycometry test

Q1. Questions on REST API and some simple front end questions
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Q2. GetMapping, springboot
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Q3. How to write a test cases in junit
Ans. 
JUnit is a popular testing framework for Java that allows developers to write and run repeatable tests.
• 1. Import JUnit libraries: Use 'import org.junit.*;' to access JUnit classes.

• 2. Create a test class: Annotate the class with '@RunWith(JUnit4.class)' to indicate it's a test class.

• 3. Write test methods: Annotate methods with '@Test' to mark them as test cases. Example: '@Test public void testAddition() { assertEquals(...read more
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Q1. Very basic questions
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Q2. Security for API,
Ans. 
API security involves protecting APIs from threats and vulnerabilities to ensure data integrity and confidentiality.
• Use HTTPS to encrypt data in transit, preventing eavesdropping.

• Implement authentication mechanisms like OAuth 2.0 for secure access.

• Validate and sanitize inputs to prevent injection attacks.

• Rate limiting can prevent abuse by restricting the number of requests.

• Use API gateways to manage and monitor API tra...read more
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1 hour Hacker Rank Platform Medium To Hard Level Problems are there.

Q1. DSA,OOPS,DBMS One coding Problem on Arrays
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Q1. Discussion On Projects And Some DSA Topics Like Stacks,Queues Problems
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Medium level questions , 1 hr

Q1. Medium level, technical knowledge test
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Q1. Very low level system design
Ans. 
Design a low-level system for a software engineer interview.
• Start by understanding the requirements and constraints of the system.

• Identify the components and their interactions.

• Consider the data structures and algorithms needed.

• Think about performance, scalability, and fault tolerance.

• Document the design and discuss trade-offs.
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Dsa question about maps

Q1. Design robotic restaurant
Ans. 
Robotic restaurant design for automated food preparation and delivery
• Implement robotic arms for cooking and food preparation

• Utilize conveyor belts for transporting dishes to customers

• Incorporate automated order taking and payment systems

• Design a user-friendly interface for customers to place orders and customize meals

• Ensure efficient cleaning and maintenance processes for the robots
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Q2. How to achieve fault tolerance
Ans. 
Achieve fault tolerance by implementing redundancy, monitoring systems, and graceful degradation.
• Implement redundancy by having backup systems in place to take over in case of failure

• Monitor systems continuously to detect faults and address them proactively

• Use graceful degradation to ensure that the system remains functional even if certain components fail
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Design coupon system based on reqs

Q1. Brute force algo
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Q2. Cdn type questions
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It was a 90 minute coding test, involving 3 problems:
1-Given points on a 2d plane, you can delete one point, what is the minimum maximum distance you can have?
2-LFU Cache
3-Given an array with elements 0,1, your task is to find number of ways to divide this array into contiguous chunks so that each chunk has only one 1 in it.

Q1. How do you avoid method overriding?
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Q2. What is the 'finalize' keyword for?
Ans. 
The 'finalize' keyword is used in Java to perform cleanup operations before an object is garbage collected.
• The 'finalize' method is called by the garbage collector before reclaiming an object's memory.

• It can be used to release resources like closing files or sockets.

• It is not recommended to rely on 'finalize' for resource cleanup as it is not guaranteed to be called.
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