Dainik Bhaskar Group Software Developer Interview Questions and Answers

Q1. Tell me about yourself
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Stocks, profit and loss, percentage, work, speed and time

Q1. Projects explanation
Ans. 
I have worked on various projects including web development, mobile app development, and data analysis.
• Developed a responsive e-commerce website using HTML, CSS, and JavaScript

• Created a mobile app for tracking fitness goals using React Native

• Performed data analysis on customer behavior using Python and SQL
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Q2. Depends on individual
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Coding test with 2 questions

Q1. Technical interview round
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There were 3 coding questions on Hacker Earth platform for 1 hour 15min and 1 question from array and 2 questions from strings.

Q1. This round was based on SQL, DBMS, DSA, OOPS SQL--> Designed the complete schema for one of my projects for COVID-19 vaccination. and SQL queries from that schema. DSA--> 1.) Find the pair in an array whos...read more
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Q1. This was a technical managerial round. OOPS--> Example of overloading and overriding. Mostly DBMS and SQL-based questions like what is indexing and SQL queries and joins. DSA--> 1.) Write one sorting algo....read more
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Q1. Just a normal discussion regarding my tech stack and my internship experience only 15mins.
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Best Time to sell and buy stock

Q1. Promises, closures, hoisting in JS
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Q2. Classes and Object Prototyping
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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,
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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
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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?
Ans. 
To avoid method overriding, make the method final or private.
• Declare the method as final to prevent it from being overridden in subclasses.

• Declare the method as private to hide it from subclasses.

• Use the @Override annotation to ensure that a method is actually overriding a superclass method.
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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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