SmartQ - Bottle Lab Technologies Software Engineer Interview Questions and Answers

2 coding question for 60 mins. One array based question and one string based question.

Q1. Oops 2 pillars with examples ?
Ans. 
Oops 2 pillars are Abstraction and Encapsulation.
• Abstraction: Hiding unnecessary details and showing only relevant information. Example: Car dashboard displaying speed without showing internal engine details.

• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: Class in object-oriented programming encapsulates data and methods.
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Q2. Inheritance and it's types with examples ?
Ans. 
Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.
• Types of inheritance: single inheritance, multiple inheritance, multilevel inheritance, hierarchical inheritance

• Single inheritance: a class inherits from only one parent class. Example: class Dog inherits from class Animal

• Multiple inheritance: a class inherits from multiple parent classes. Example:...read more
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Q1. My expertise are in golang. And all the questions were straight forward around golang.
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Q2. What is concurrency. How to check performance of applications. How to handle concurrency. How many no of goroutines can be created and so on.
Ans. 
Concurrency is the ability of a system to run multiple tasks simultaneously. Performance of applications can be checked using profiling tools. Concurrency can be handled using synchronization techniques like mutexes and channels.
• Concurrency allows multiple tasks to run concurrently, improving performance and responsiveness.

• Performance of applications can be checked using profiling tools like Go's built-in 'pprof' packa...read more
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Q1. How to make sure there are no vulnerabilities. What engineering principles you follow.
Ans. 
To ensure no vulnerabilities, follow secure coding practices, conduct regular security audits, use encryption, and stay updated on security threats.
• Follow secure coding practices such as input validation, output encoding, and parameterized queries.

• Conduct regular security audits to identify and address vulnerabilities in the code.

• Use encryption to protect sensitive data in transit and at rest.

• Stay updated on security t...read more
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It was a Basic Aptitude Test

We were asked to do Sorting, SQL queries (join)

Q1. Can you tell me about yourself?
Ans. 
I am a passionate software engineer with 5 years of experience in developing web applications using various technologies.
• 5 years of experience in software development

• Proficient in developing web applications

• Skilled in using various technologies such as Java, JavaScript, and SQL
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Q1. Questions on OOPS, Core Concepts of C#, SQL
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Q1. Questions on System Design and tricky questions on OOPS
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Q1. Previous organization work culture and expectations
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It is noraml question

Basica questions for the coding

Q1. When can you join
Ans. 
I can join within 2 weeks of receiving an offer.
• I can start within 2 weeks of receiving an offer.

• My current notice period is 2 weeks.

• I am available to start immediately.
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Q1. Whats are oops and tell some exmaples
Ans. 
OOPs stands for Object-Oriented Programming. It is a programming paradigm based on the concept of objects.
• OOPs focuses on creating objects that contain data and methods to manipulate that data.

• Encapsulation, Inheritance, Polymorphism, and Abstraction are the four main principles of OOPs.

• Examples of OOPs languages include Java, C++, Python, and C#.
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Q2. Whats is dbms and what are joins?
Ans. 
DBMS stands for Database Management System. Joins are used to combine rows from two or more tables based on a related column between them.
• DBMS is a software that manages databases, allowing users to interact with the data stored in them.

• Joins are used in SQL queries to combine data from multiple tables based on a related column.

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.
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Q1. Tell me about yourself
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Q2. Why do you want to join volkswagen
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The test was simple. Logically reasoning and some speed and time related questions

Q1. I was a fresher so asked about my branch and then asked me to code in microprocessor and controller
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Q2. Add two numbers using microprocessor.
Ans. 
To add two numbers using a microprocessor, perform arithmetic operations using the microprocessor's instruction set.
• Load the two numbers into registers

• Use the microprocessor's addition instruction to add the numbers

• Store the result in a register or memory location
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Q1. Salary discussion briefed about the company and its benefits
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