Sai InfoSystem Interview Questions and Answers

Q1. Basic Javascript questions were asked like Hoisting, Event Loop, Closure.
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Q2. What are semantic tags? << HTML based question
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Q3. What is currying in js?
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Q4. What is the difference between Map and Filter?
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Q5. What is the difference between Map and ForEach?
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Q6. What is the difference between Authentication and Authorization?
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Q7. What is the difference between Local storage and Session storage?
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Q1. This was the Final round, it lasted for around 30 mins and the interviewer gave me a coding question to build a Countdown Timer app.
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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?
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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?
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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?
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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)?
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Q3. What version control tools do you use, and can you explain how you utilize them?
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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?
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Q5. What is the Bash command to suppress all output and errors?
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Q1. Can you tell me about yourself and your family?
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Q2. Are you comfortable with the possibility of relocating for the position?
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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?
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Q1. Could you provide a description of yourself and an overview of your career accomplishments?
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Q2. What are your reasons for wanting to leave your current company?
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Q3. What are your salary expectations?
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Q1. Interviewer will describe the scenario and discuss the UX terminologies?
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Q2. Whiteboarding conducted
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Q1. Tech questions and UX related questions were asked
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Q1. Manager Round was conducted
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Q1. Implement a custom stack that allows fetching the minimum element in constant time, O(1).
Ans. 
Custom stack with constant time access to minimum element
• Use two stacks - one to store elements and another to store minimum values

• When pushing an element, compare with top of min stack and push the smaller value

• When popping an element, pop from both stacks

• Access minimum element in O(1) time by peeking at top of min stack
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Q2. How can one create an immutable class named Employee with fields for name and hobbies defined as List?
Ans. 
To create an immutable class named Employee with fields for name and hobbies defined as List<String>, use private final fields and return new instances in getters.
• Use private final fields for name and hobbies in the Employee class

• Provide a constructor to initialize the fields

• Return new instances or unmodifiable lists in the getters to ensure immutability
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Q3. What changes are required in the Employee class to use it as a key for a HashMap?
Ans. 
Add hashCode() and equals() methods to Employee class.
• Override hashCode() method to generate a unique hash code for each Employee object.

• Override equals() method to compare Employee objects based on their attributes.

• Ensure that the attributes used in hashCode() and equals() methods are immutable.

• Example: Add id, name, and department attributes to Employee class and override hashCode() and equals() methods based on thes
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Q4. What is the implementation of the singleton design pattern?
Ans. 
Singleton design pattern ensures a class has only one instance and provides a global point of access to it.
• Create a private static instance of the class within the class itself.

• Provide a public static method to access the instance, creating it if necessary.

• Ensure the constructor of the class is private to prevent instantiation from outside the class.

• Use lazy initialization to create the instance only when needed.

• Thread...read more
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Q5. Different ways to create a thread
Ans. 
Ways to create a thread in Java include extending the Thread class, implementing the Runnable interface, and using Java 8's lambda expressions.
• Extend the Thread class and override the run() method

• Implement the Runnable interface and pass it to a Thread object

• Use Java 8's lambda expressions with the Executor framework
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Q6. What are the SOLID principles in software design, and can you provide examples for each?
Ans. 
SOLID principles are a set of five design principles in object-oriented programming to make software more maintainable, flexible, and scalable.
• Single Responsibility Principle (SRP) - A class should have only one reason to change. Example: A class that handles user authentication should not also handle database operations.

• Open/Closed Principle (OCP) - Software entities should be open for extension but closed for modific...read more
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Q1. What is the concept of Object-Oriented Programming (OOP) and can you provide an example?
Ans. 
OOP is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
• OOP focuses on creating objects that interact with each other to solve a problem.

• Encapsulation is a key concept in OOP, where data is kept within an object and only accessible through its methods.

• Inheritance allows objects to inherit attributes and methods from parent classes.

• Po...read more
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Q2. How do threads communicate with each other in Java?
Ans. 
Threads communicate in Java through shared memory or message passing.
• Threads can communicate through shared variables in memory.

• Threads can communicate through synchronized methods or blocks.

• Threads can communicate through wait(), notify(), and notifyAll() methods.

• Threads can communicate through message passing using classes like BlockingQueue or ExecutorService.
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Q3. Write a program to reverse a linked list.
Ans. 
Program to reverse a linked list
• Create a new linked list to store the reversed elements

• Traverse the original linked list and insert each node at the beginning of the new list

• Update the head of the new list as the last node of the original list
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Q4. What is the difference between string literals and the string pool?
Ans. 
String literals are constant strings defined in code, while the string pool is a memory area where unique string objects are stored.
• String literals are created using double quotes, while string pool objects are created using the 'new' keyword.

• String literals are stored in the string pool to conserve memory and improve performance.

• String literals are automatically interned by the JVM, while string pool objects need to b
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Q5. What is the program to print the 90-degree rotated view of a 2D array?
Ans. 
Program to print the 90-degree rotated view of a 2D array.
• Iterate through each column in reverse order and print the corresponding row elements.

• Repeat this process for all columns to get the rotated view of the 2D array.
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Q1. What are the key topics related to Generative AI, specifically focusing on Retrieval-Augmented Generation (RAG) and Large Language Models (LLM)?
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Q2. What is your understanding of the existing project and the technology stacks used?
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Q1. What has been your contribution to existing work and the technologies used in that context?
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Q2. ML, DL, Gen AI implementation and flow
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Q3. Python Coding logic and semantics
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Q1. What are the existing work challenges you face, and what solutions have you implemented to address them?
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Q2. What is your understanding of Generative AI and Natural Language Processing (NLP), and can you provide examples of their use cases?
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Difference between soft skills and hard skills

Q1. What is manual testing
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Q2. What is defect life cycleif
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Q1. What is the main thing should have for a test engineer
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Q2. What's your opinion on testing
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Q1. Are you ok with rotational shifts?
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Q2. Are you ok with the work location?
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The assessment consists of a one-hour aptitude test that includes questions on data structures and algorithms (DSA) as well as SQL query questions, where I am required to write SQL queries, followed by two coding questions.

Our group discussion topic is whether AI can replace human intelligence.

Q1. Oops concept in java
Ans. 
Oops concept in Java refers to Object-Oriented Programming principles like inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance allows a class to inherit properties and behavior from another class.

• Encapsulation refers to bundling data and methods that operate on the data into a single unit.

• Polymorphism allows objects to be treated as instances of their parent class.

• Abstraction hides the implementation ...read more
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Q2. What is compile time polymorphism
Ans. 
Compile time polymorphism is the ability of a programming language to select which method to execute at compile time based on the method signature.
• Compile time polymorphism is achieved through method overloading and operator overloading.

• Method overloading allows multiple methods in the same class with the same name but different parameters.

• The compiler determines which method to call based on the number and type of arg...read more
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Q3. What is the SQL query to select and display the name of person who have highest salary among employees?
Ans. 
SQL query to select and display the name of person with highest salary among employees.
• Use the MAX() function to find the highest salary

• Join the employee table with the salary table using a common key like employee_id

• Select the name of the person with the highest salary
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Q1. Tell me about yourself. then about final year project.
Ans. 
I am a dedicated QA Automation Testing Engineer with experience in creating and executing test cases. My final year project involved developing a test automation framework using Selenium.
• Experienced QA Automation Testing Engineer

• Skilled in creating and executing test cases

• Developed test automation framework using Selenium for final year project
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Q2. What is your family background, and are you prepared to relocate?
Ans. 
I come from a close-knit family with a diverse background. I am open to relocating for the right opportunity.
• Family background is close-knit and diverse

• Open to relocating for the right opportunity
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Q1. How do you go about SDLC process
Ans. 
I follow the Software Development Life Cycle (SDLC) process to ensure successful project delivery.
• I start with requirements gathering and analysis to understand the project scope and objectives.

• I then move on to design, where I create a detailed plan for how the system will be built.

• Next, I proceed to development, where the actual coding and implementation of the system takes place.

• After development, I conduct thorough...read more
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Q2. What are roles and responsibilities of a BA
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Q3. How do you deduce a complex problem statement
Ans. 
By breaking down the problem into smaller components and analyzing each part individually
• Identify the key components of the problem statement

• Break down the problem into smaller, more manageable parts

• Analyze each part individually to understand its impact on the overall problem

• Consider different perspectives and potential solutions

• Collaborate with team members or stakeholders to gain additional insights
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Q1. Explain the difference between BRD and FRD
Ans. 
BRD is a document that outlines business requirements, while FRD is a document that details functional requirements.
• BRD focuses on what the business needs, while FRD focuses on how those needs will be met.

• BRD is high-level and non-technical, while FRD is detailed and technical.

• BRD is created before FRD in the project lifecycle.

• Example: BRD may state the need for a customer relationship management system, while FRD will...read more
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Q2. How do you go about creating user stories, how do you allocate the points
Ans. 
User stories are created by collaborating with stakeholders and allocating points based on complexity and effort required.
• Collaborate with stakeholders to gather requirements and understand user needs

• Break down features into smaller, manageable user stories

• Prioritize user stories based on business value and dependencies

• Allocate points based on complexity, effort, and risk involved

• Use techniques like Planning Poker to a
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Q3. What is the SOP while creating a requirement gathering doc
Ans. 
The SOP for creating a requirement gathering doc involves planning, interviewing stakeholders, documenting requirements, and obtaining approval.
• Plan the requirement gathering process by identifying stakeholders and their needs

• Conduct interviews with stakeholders to gather detailed requirements

• Document the requirements in a clear and organized manner

• Obtain approval from stakeholders to ensure alignment with business goa
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Q1. How proficient are you with using tools such as Jira, Cofluence, SQL
Ans. 
I am highly proficient in using Jira, Confluence, and SQL for various business analysis tasks.
• I have extensive experience using Jira for project management, issue tracking, and agile development.

• I am skilled in using Confluence for documentation, collaboration, and knowledge sharing within teams.

• I have strong SQL skills for data analysis, querying databases, and generating reports.

• I have used these tools in previous pr...read more
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Q2. How do you handle disagreements within internal stakeholders
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Q3. What values do you look in a collegue
Ans. 
I look for values such as integrity, teamwork, communication, and adaptability in a colleague.
• Integrity - honesty, trustworthiness, and ethical behavior

• Teamwork - collaboration, support, and willingness to help others

• Communication - clear and effective communication skills

• Adaptability - ability to adjust to changing circumstances and problem-solve
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