Bounteous x Accolite Interview Questions, Process, and Tips

Coding questions based on graphs.

Q1. What is Threads?
Ans. 
Threads are lightweight processes within a program that can run concurrently, allowing for multitasking and improved performance.
• Threads allow for parallel execution of tasks within a program.

• Threads share the same memory space, allowing for efficient communication and data sharing.

• Examples of using threads include running background tasks while the main program continues to execute, or handling multiple client request
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Q2. Gave 2 coding questions.
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Q1. What is the Look and Say sequence, and how can a program be written to generate the next number in this sequence?
Ans. 
Look and Say sequence is a sequence of numbers where each term is formed by describing the previous term.
• Start with the number 1

• Read off the digits of the previous number, counting the number of digits in groups of the same digit

• For example, starting with 1, the sequence would be: 1, 11, 21, 1211, 111221, ...
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Q2. What is the SQL query to perform a join on two tables and calculate the aggregate sum using the product ID?
Ans. 
SQL query to perform a join on two tables and calculate aggregate sum using product ID.
• Use JOIN keyword to combine two tables based on a related column (e.g. product ID)

• Use GROUP BY clause to group the results by product ID

• Use SUM() function to calculate the aggregate sum of a column (e.g. price)
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Q3. What is the process for writing a Bash script to read and parse a CSV file and print the last character of each line?
Ans. 
The process for writing a Bash script to read and parse a CSV file and print the last character of each line involves using a combination of commands and loops.
• Use the 'while read' loop to read each line of the CSV file

• Use 'awk' command to extract the last character of each line

• Print the last character using 'echo' command
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Platform: Coderbyte Test. The process is similar to the technical round, except that in the last bash script question, instead of printing the last character, print the third last character of each line.

Q1. Can you tell me about yourself?
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Q2. What are the principles of Continuous Integration and Continuous Deployment (CI/CD)?
Ans. 
CI/CD is a software development practice where code changes are automatically built, tested, and deployed frequently.
• Continuous Integration (CI) involves automatically integrating code changes into a shared repository multiple times a day.

• Continuous Deployment (CD) involves automatically deploying code changes to production after passing automated tests.

• CI/CD helps in detecting and fixing integration errors early, ensu...read more
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Q3. What version control tools do you use, and can you explain how you utilize them?
Ans. 
I primarily use Git for version control, utilizing branches, commits, and merges for collaboration and tracking changes.
• Primary version control tool is Git

• Utilize branches for different features or fixes

• Regularly commit changes with descriptive messages

• Merge branches to integrate changes

• Use tools like GitHub or Bitbucket for collaboration
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Q4. What is the SQL query to join two tables and use aggregate functions such as SUM and AVG with GROUP BY?
Ans. 
SQL query to join two tables, use aggregate functions like SUM and AVG with GROUP BY
• Use JOIN keyword to combine two tables based on a common column

• Use GROUP BY clause to group the results based on a specific column

• Use aggregate functions like SUM() and AVG() to calculate totals and averages within each group
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Q5. What is the Bash command to suppress all output and errors?
Ans. 
The Bash command to suppress all output and errors is 'command > /dev/null 2>&1'
• Use '>' to redirect standard output to /dev/null

• Use '2>&1' to redirect standard error to standard output

• Combine both to suppress all output and errors: 'command > /dev/null 2>&1'
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Q1. Can you tell me about yourself and your family?
Ans. 
I am a dedicated professional with a passion for technology. My family is supportive and close-knit.
• I have a background in technical project management

• My family consists of my parents, my spouse, and two children

• We enjoy spending time together outdoors and traveling
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Q2. Are you comfortable with the possibility of relocating for the position?
Ans. 
Yes, I am open to relocating for the position.
• I am open to relocating for the right opportunity

• I have relocated for previous positions and am comfortable with the process

• I understand the benefits of relocating for career growth and development
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Q3. Would it be acceptable to work shift timings from 6:30 AM to 3:30 PM considering that the client is based in New Zealand?
Ans. 
Yes, it would be acceptable to work shift timings from 6:30 AM to 3:30 PM for a client based in New Zealand.
• Working from 6:30 AM to 3:30 PM would align with the standard working hours in New Zealand due to the time zone difference.

• This shift timing would allow for better communication and collaboration with the client in New Zealand.

• It is important to ensure that the team is able to adjust to the early start time and m
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10 Macq's and 1 problem solving question.

Q1. Self Introduction
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Q2. Last project details
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Q3. Print all duplicate elements in an Array
Ans. 
Print duplicate elements in an Array of strings
• Iterate through the array and use a HashMap to store frequency of each element

• Print elements with frequency greater than 1 as duplicates
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Q4. Java Exception Handling and Spring exception handling.
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Q5. Spring IOC and types.
Ans. 
Spring IOC (Inversion of Control) is a design pattern where the control of object creation and lifecycle is shifted to a container.
• In Spring IOC, objects are created and managed by the Spring container.

• Types of Spring IOC include Constructor-based dependency injection and Setter-based dependency injection.

• Example: In Constructor-based dependency injection, dependencies are provided through the constructor of a class.

• Ex...read more
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Q6. Circuit Breaker and its states
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Circuit Breaker is a design pattern used in software development to prevent system overload and failures.
• Circuit Breaker monitors the number of failures and opens when a threshold is reached.

• It can be in states like closed, open, or half-open.

• Closed state allows normal operation, open state prevents further requests, and half-open state allows limited requests to check if the system is back to normal.

• Examples include H
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Q7. Design Pattern
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Q8. Get the third highest salary from employee table
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Q9. Valid parentheses from leetCode
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Q1. Self intro, Project based questions.
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Q2. Optional Class, Stream.map() vs Stream.flatMap()
Ans. 
Stream.map() transforms each element in a stream, while Stream.flatMap() transforms each element into a stream of values.
• map() applies a function to each element in a stream and returns a new stream with the transformed elements.

• flatMap() applies a function that returns a stream for each element in the original stream, then flattens the streams into a single stream of values.

• Example: map() - Stream.of(1, 2, 3).map(x -&...read more
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Q3. Lambda, reduce()
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Q4. Sync Api vs Async Api, Sync Microservice and Async microservice example
Ans. 
Sync API waits for a response before continuing, while Async API allows the program to continue executing without waiting for a response.
• Sync API is blocking and waits for a response before proceeding

• Async API is non-blocking and allows the program to continue executing while waiting for a response

• Sync microservice handles requests sequentially, while Async microservice can handle multiple requests concurrently

• Example ...read more
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Q5. Write a REST api to fetch user details using userId.
Ans. 
Create a REST api to fetch user details using userId
• Create a GET endpoint /users/{userId} to fetch user details

• Use userId as a parameter in the endpoint

• Return user details in JSON format

• Handle errors for invalid userId
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Q6. SOLID Principle and best coding practices
Ans. 
SOLID principles and best coding practices are essential for creating maintainable and scalable software.
• S - Single Responsibility Principle: Each class should have only one responsibility.

• O - Open/Closed Principle: Classes should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Subtypes should be substitutable for their base types.

• I - Interface Segregation Principle: Clients should ...read more
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Q7. Write a global exception handler class to handle UserNotFound exception.
Ans. 
Create a global exception handler class for UserNotFound exception.
• Create a class that extends ExceptionHandler class

• Override the handleException method to handle UserNotFound exception

• Implement the logic to handle the exception, such as logging or returning a custom error message
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Q8. Advantages of IOC in spring and DI
Ans. 
IOC in Spring and DI offer flexibility, maintainability, and testability in software development.
• Promotes loose coupling between components

• Allows for easier unit testing and mocking

• Facilitates easier configuration and management of dependencies

• Enables better separation of concerns

• Promotes reusability of components
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Q1. Self Intro and salary negotiation.
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Q1. How did you implement multithreading in your project?
Ans. 
Implemented multithreading using Java's Thread class and Executor framework.
• Used Thread class to create and manage threads.

• Utilized Executor framework for managing thread pools and executing tasks.

• Implemented synchronization mechanisms like locks and semaphores to prevent race conditions.

• Used Java's concurrent data structures like ConcurrentHashMap and BlockingQueue for thread-safe operations.
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Q2. What is the concept of lock isolation in Spring Framework?
Ans. 
Lock isolation in Spring Framework ensures that each transaction operates independently without interfering with other transactions.
• Lock isolation prevents concurrent transactions from affecting each other's data.

• Different levels of lock isolation can be set in Spring, such as READ_COMMITTED and REPEATABLE_READ.

• For example, setting a higher level of lock isolation like REPEATABLE_READ ensures that a transaction will no...read more
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Q3. What is the purpose of the @Primary and @Qualifier annotations in Spring Framework?
Ans. 
The @Primary annotation is used to give a higher priority to a bean when multiple beans of the same type are present. The @Qualifier annotation is used to specify which bean to inject when multiple beans of the same type are present.
• Use @Primary annotation to specify the primary bean to be used when multiple beans of the same type are present.

• Use @Qualifier annotation along with the bean name to specify which bean to i...read more
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Q4. How do you implement security measures for your microservices?
Ans. 
Implementing security measures for microservices involves using authentication, authorization, encryption, and monitoring.
• Implement authentication mechanisms such as OAuth, JWT, or API keys to verify the identity of clients accessing the microservices.

• Enforce authorization rules to control access to different parts of the microservices based on roles and permissions.

• Use encryption techniques like TLS/SSL to secure comm...read more
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Q5. Handling distributed transactions in microservices using the Saga pattern?
Ans. 
Saga pattern is used to manage distributed transactions in microservices by breaking them into smaller, independent transactions.
• Saga pattern involves breaking down a long transaction into a series of smaller, independent transactions.

• Each step in the saga is a separate transaction that can be rolled back if needed.

• Compensating transactions are used to undo the effects of a previously completed step in case of failure.

• ...read more
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