Infinite Computer Solutions Senior QA Lead Interview Questions and Answers

Short basic algorithms test

Q1. Java OOPS Concept Questions, Multithreading
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Q1. Team Management Skills
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Q1. Callable and runnable difference
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Q2. Java 8 features
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Q1. Scenario based technical question
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Q2. Code Test , write pseudo code for problem
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Scenario based question and pseudo code for technical problem

Q1. What are your salary expectations?
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Q1. What is AD and concept
Ans. 
AD stands for Active Directory, a directory service developed by Microsoft for Windows domain networks.
• AD is used to store information about network resources such as computers, users, groups, and printers.

• It allows administrators to manage and secure access to resources within a network.

• AD uses a hierarchical structure with domains, trees, and forests to organize objects.

• Group Policy Objects (GPOs) can be used to appl...read more
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Q2. How to troubleshoot Oracle
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Troubleshooting Oracle involves identifying and resolving issues with database performance, connectivity, and errors.
• Check database connectivity by testing connection using SQL*Plus or SQL Developer

• Review alert logs and trace files for error messages and performance issues

• Monitor database performance using tools like Oracle Enterprise Manager or AWR reports

• Check for resource contention issues such as high CPU or memory...read more
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Q1. Basics of React Native.
Ans. Learn the various types of components, lifecycle
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Q2. React Native thread working
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Q3. Check various available tutorials
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Q1. Unix: 1)How we simply find files in directory 2)count of word by using grep command 3)how we kill the particular process 4)command for findout kernal version and on which operating system we worked on 5)w...read more
Ans. 
Technical interview questions on Unix and SQL
• To find files in a directory, use the 'find' command

• To count words using grep, use the '-c' option

• To kill a particular process, use the 'kill' command with the process ID

• To find the kernel version and operating system, use the 'uname' command

• The 'top' command is used to monitor system processes and resource usage

• A zombie process is a process that has completed execution but ...read more
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Q1. 1) project flow which I worked in previous organization 2)which linux operating system used 3)what is the application server in your project 4)what is the webserver 5)how you login to your application 6)w...read more
Ans. 
Questions related to project flow, Linux OS, application and web server, troubleshooting, ticketing tool, and handling critical situations.
• Worked on Agile methodology with JIRA as ticketing tool

• Used Ubuntu as the Linux operating system

• Tomcat was the application server and Apache was the web server

• Logged in to the application using LDAP authentication

• Performed troubleshooting by analyzing logs and using debugging tools

• H...read more
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Q1. It is technical interview for screening for technical knowledge
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Q2. Explain Oops concept in .net
Ans. 
OOPs concept in .NET 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: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementatio...read more
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Q3. What is .Net core advance features
Ans. 
Some advanced features of .Net Core include cross-platform support, performance improvements, and support for modern development practices.
• Cross-platform support allows developers to build and run applications on different operating systems.

• Performance improvements such as faster startup times and lower memory usage.

• Support for modern development practices like containerization and microservices architecture.

• Built-in s...read more
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Q4. What is Interface vs Abstraction
Ans. 
Interface defines a contract for a class to implement, while abstraction hides the implementation details.
• Interface is a blueprint of a class that defines what methods a class must implement.

• Abstraction is a concept that hides the implementation details and shows only the functionality.

• Interfaces can have multiple inheritance, while abstraction can be achieved using abstract classes.

• Example: Interface 'Shape' may have ...read more
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Q5. What are extention methods
Ans. 
Extension methods are a way to add new methods to existing types without modifying the original type.
• Extension methods are defined as static methods in a static class.

• They must be in the same namespace as the type being extended.

• They are called like instance methods on the extended type.

• Example: Adding a method to the String class to reverse a string.
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Q6. Explain service life time
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Q7. What is middle tier
Ans. 
Middle tier is the layer of software that acts as a bridge between the front-end user interface and the back-end database.
• Middle tier handles business logic and processing of data

• It often includes application servers, web servers, and APIs

• Examples include Java EE, .NET Framework, and Node.js
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Q8. What is DI and it's use
Ans. 
DI stands for Dependency Injection and is a design pattern used to increase flexibility and maintainability of code.
• DI is a technique where one object supplies the dependencies of another object instead of the object creating them itself.

• It helps in decoupling components, making them easier to test and reuse.

• DI containers like Spring Framework in Java are used to manage dependencies and inject them into objects.

• Example...read more
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Q1. It is for deep knowledge and knowledge of cloud and communication accessment
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Q2. Explain structure and later of current project
Ans. 
The current project is a web application for managing inventory and sales.
• The project follows a MVC (Model-View-Controller) architecture

• Uses technologies like React for the front-end and Node.js for the back-end

• Database schema includes tables for products, customers, orders, etc.

• Implemented features like user authentication, product search, and order processing
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Q3. What is your current role
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Q4. Explain Solid principles
Ans. 
SOLID principles are a set of five design principles that help make software designs more understandable, flexible, and maintainable.
• Single Responsibility Principle (SRP) - A class should have only one reason to change.

• Open/Closed Principle (OCP) - Software entities should be open for extension but closed for modification.

• Liskov Substitution Principle (LSP) - Objects of a superclass should be replaceable with objects o...read more
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Q5. Explain the is IOC
Ans. 
Inversion of Control (IoC) is a design principle where the flow of control is inverted compared to traditional programming.
• IoC is a design pattern where the control of flow is inverted from the traditional approach.

• In IoC, the control is passed to a framework or container that manages the flow of the application.

• Dependency Injection is a common implementation of IoC, where dependencies are injected into a class rather
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Q6. What is pipeline funtions
Ans. 
Pipeline functions are a series of functions or tasks that are executed in a specific order to process data or perform actions.
• Pipeline functions help streamline complex processes by breaking them down into smaller, manageable tasks

• Each function in the pipeline takes input from the previous function and passes output to the next function

• Commonly used in data processing, automation, and software development workflows
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Q7. How to use session in .net core
Ans. 
Session in .NET Core is used to store user-specific information across multiple requests.
• Use services.AddSession() in ConfigureServices method of Startup class to enable session

• Use app.UseSession() in Configure method of Startup class to add session middleware

• Access session data using HttpContext.Session property

• Example: HttpContext.Session.SetString("UserName", "JohnDoe") to store a string in session

• Example: string us...read more
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Q8. Explain ACID properties in DB
Ans. 
ACID properties in DB ensure data integrity and consistency
• Atomicity: All operations in a transaction are completed successfully or none at all

• Consistency: Data is always in a valid state before and after a transaction

• Isolation: Transactions are isolated from each other until they are completed

• Durability: Once a transaction is committed, changes are permanent and survive system failures
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Q9. What are diff Isolation levels
Ans. 
Isolation levels define the level of visibility a transaction has on other concurrent transactions.
• Isolation levels include READ UNCOMMITTED, READ COMMITTED, REPEATABLE READ, and SERIALIZABLE.

• READ UNCOMMITTED allows dirty reads, READ COMMITTED prevents dirty reads but allows non-repeatable reads, REPEATABLE READ prevents non-repeatable reads but allows phantom reads, and SERIALIZABLE prevents all anomalies.

• Isolation le...read more
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Q1. What is sal expectation
Ans. 
Salary expectation is the amount of money a candidate expects to be paid for a specific job role.
• Salary expectation is usually discussed during the job interview process.

• Candidates may base their salary expectations on factors such as their experience, qualifications, industry standards, and cost of living.

• Employers may also consider the candidate's salary expectation when making a job offer.

• It is important for candida...read more
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Q2. How soon you can join
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Q1. Tell me about yourself and various situations
Ans. 
I am a seasoned Technical Lead with experience in leading teams, solving complex technical challenges, and driving project success.
• Led a team of developers in implementing a new software system for a client

• Resolved a critical production issue by quickly identifying the root cause and implementing a fix

• Collaborated with cross-functional teams to deliver projects on time and within budget
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