SmartQ - Bottle Lab Technologies Software Engineer Interview Questions and Answers

Q1. How to reverse two numbers without using temp variable
Ans. 
To reverse two numbers without using a temp variable, use bitwise XOR operation.
• Use bitwise XOR operation to swap two numbers without using a temp variable.

• Example: a = 5, b = 7. a = a XOR b, b = a XOR b, a = a XOR b. After this, a = 7, b = 5.
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Q1. Why do you want to join Thermo Fisher
Ans. 
I want to join Thermo Fisher because of their reputation for innovation and impact in the scientific community.
• Thermo Fisher is a leader in the scientific research and healthcare industry

• I am impressed by their commitment to innovation and cutting-edge technology

• I believe working at Thermo Fisher will provide me with opportunities for professional growth and development
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Q1. Self Introduction, explain about your projects
Ans. 
I am a software engineer with experience in developing web applications using Java, Spring Boot, and Angular.
• Developed a web application for a retail company using Java and Spring Boot

• Implemented RESTful APIs for communication between frontend and backend

• Designed and developed user interfaces using Angular framework
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Q2. Rotate an array n times with a O(1) time complexity
Ans. 
Use modular arithmetic to efficiently rotate array n times.
• Use modular arithmetic to calculate the effective number of rotations (n % array length)

• Reverse the entire array

• Reverse the first n elements

• Reverse the remaining elements
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Q1. Self Introduction
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Q2. What do you know about the company
Ans. 
The company is a leading software development firm specializing in creating innovative solutions for various industries.
• Specializes in creating innovative software solutions

• Works with clients from various industries

• Known for high-quality and reliable products

• Has a strong team of software engineers and developers
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Q1. Tell me about yourself
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Q2. Core java questions. Just basic ones
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Q3. Spring boot . Annoations like @RestController @SpringBootApplication etc.
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Q4. Count occurences of words in a string
Ans. 
Count the occurrences of words in a string.
• Split the string into words using whitespace as a delimiter.

• Create a dictionary to store the word count.

• Iterate through the words and increment the count in the dictionary.

• Return the dictionary.
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Q1. Basic discussion about project
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Q2. What are the positives and negatives of microservice architecture
Ans. 
Microservice architecture offers flexibility and scalability but also adds complexity and requires careful management.
• Positives: flexibility, scalability, fault isolation, independent deployment, technology diversity

• Negatives: increased complexity, higher operational overhead, potential for communication issues, requires careful management

• Example: Netflix uses microservices to handle millions of users and provide perso...read more
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Aptitude questions were asked. Online test

Q1. Oops concepts and basic programming questions were asked
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Q1. Tell us about the company
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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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Quantitative questions

Q1. Questions about roles in projects at college
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Q1. Pattern type logical
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