Db4Cloud Technologies Interview Questions and Answers

Its was fully coding test using METTL platform in that there is only 1 session we need to attend having 6 questions all are Coding only. We don't need to complete all we can complete any of the question the time given was 1hr 30min in this i try to complete atleast 3 questions

Q1. In Technical interview they ask about Any programming language u prefer they will ask on that but most of java and paython is mandatory and more questions on java itself and about your project and all
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Q1. In HR round self introduction and about project discussion and they ask what they want to know about u and u r way of thinking about job
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It had 2 programming questions and 30 aptitude questions
it

Q1. Introduce yourself, educational background
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Q2. What languages are you familiar with
Ans. 
I am familiar with several programming languages including Java, Python, and C++.
• Proficient in Java and Python

• Familiar with C++ and JavaScript

• Experience with SQL and HTML/CSS

• Comfortable with object-oriented programming and data structures

• Continuously learning and exploring new languages and technologies
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Six coding questions to be solved within an hour. The coding questions were standard aptitude based and did not include any complex topics like Dynamic Programming or trees in my case.

Q1. I had to solve a problem. Given an expression involving operators and operands with parentheses, convert it to postfix expression. I used the stack data structure.
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Q1. A puzzle question
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Online coding test having basic problems and some aptitude problem.

Q1. Interviewer will ask opps and 2 basic coding problem 2 aptitude problem if you mention any technology in resume then ask about technology and projects
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Q2. What is opps ?
Ans. 
OOPs stands for Object-Oriented Programming, a programming paradigm based on the concept of objects.
• OOPs focuses on creating objects that contain both data and methods to manipulate that data.

• Encapsulation, inheritance, polymorphism, and abstraction are key principles of OOPs.

• Examples of OOPs languages include Java, C++, and Python.
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Q3. What is singleton class ?
Ans. 
A singleton class is a class that can only have one instance created and provides a global point of access to that instance.
• Singleton classes are often used for logging, caching, database connections, and thread pools.

• They typically have a private constructor to prevent instantiation from other classes.

• They provide a static method to access the single instance, which is created if it doesn't exist yet.
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Totally there were 15 questions

15 objective questions related to basic DSA, OOPS

Q1. Explain your one of the project , cross questions around project
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Q2. OS, DBMS & One medium complex coding question
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Q1. Introduce yourself & explain your fav. project.
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Q2. One coding question related to sorting & hashing, i have to share my screen and discuss all possible approaches & then write code for optimum approach.
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Nuts and bolts game, to output date in a certain format, one SQL query

Q1. Stacks and Queues
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Q2. Linked lists, arrays, and many more basic fundamental Dsa questions.
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Q1. More about your resume projects.
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Q2. Puzzles and reasoning is asked
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Q1. Architecture of current project
Ans. 
The current project follows a microservices architecture with Docker containers for scalability and flexibility.
• Microservices architecture is used to break down the application into smaller, independent services that can be developed, deployed, and scaled independently.

• Docker containers are utilized for packaging the application and its dependencies into a standardized unit for easy deployment and management.

• Service di...read more
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Q2. Spring and Hibernate questions
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Basic coding questions

DSA based round. Taken by external company. I would say to medium level questions asked.

Q1. This was based on LLD.
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Q2. Why SQL and not NoSQL?
Ans. 
SQL is preferred for structured data, transactions, complex queries, and ACID compliance.
• SQL is better for structured data and relationships between data.

• SQL is preferred for transactions and ensuring data integrity.

• SQL is more suitable for complex queries involving multiple tables.

• SQL databases provide ACID compliance for data consistency and reliability.
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Q1. Past project experience with a Tech Lead.
Ans. 
Worked on a project with a Tech Lead to develop a new feature for a web application.
• Collaborated closely with the Tech Lead to define project requirements and timelines

• Received guidance and mentorship from the Tech Lead on best practices and coding standards

• Participated in regular code reviews and discussions with the Tech Lead to ensure quality and consistency

• Implemented feedback and suggestions provided by the Tech L
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Q2. More into the problems I have solved previously and the working culture discussion.
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