K12 Techno Services System Administration Engineer Interview Questions and Answers

Q1. Basics of js and react
Add your answer
Q2. What are closures and give an example
Ans. 
Closures are functions that have access to variables from their outer scope even after the outer function has finished executing.
• Closures are created when a function is defined within another function and has access to the outer function's variables.

• They can access variables from the outer function even after the outer function has returned.

• Closures are commonly used in event handlers and callbacks in JavaScript.
Answered by AI
Add your answer
Q3. What is event loop and features of es5
Ans. 
Event loop is a mechanism that allows JavaScript to perform non-blocking operations by handling asynchronous events.
• Event loop is responsible for executing code, collecting and processing events, and executing queued sub-tasks.

• ES5 features include strict mode, JSON object, Array methods like forEach, map, filter, and reduce, and Object.create method.

• ES5 also introduced new methods for manipulating strings, such as trim
Answered by AI
Add your answer

Q1. General management round and past experience
Add your answer

Basic aptitude questions

Linked list, array, tree and graph questions

Q1. How to manage and configure postfix mail server.
Ans. 
Postfix mail server can be managed and configured using configuration files and command line tools.
• Edit the main configuration file /etc/postfix/main.cf to make changes to the server settings

• Use postconf command to view or change configuration parameters

• Restart the postfix service after making changes for them to take effect

• Utilize tools like postmap to manage lookup tables for postfix

• Monitor mail server logs for troub
Answered by AI
Add your answer
Q2. OS go to maintenance mode, how to fix it.
Ans. 
To fix an OS in maintenance mode, reboot the system, check for any recent changes or updates, run diagnostics, and restore from a backup if necessary.
• Reboot the system to see if it resolves the issue

• Check for any recent changes or updates that may have caused the OS to go into maintenance mode

• Run diagnostics to identify any hardware or software issues

• Restore the OS from a backup if needed
Answered by AI
Add your answer

Two Medium DSA problem to solve

Q1. Design scalable Streaming pipeline and
Ans. 
Design a scalable streaming pipeline for processing large volumes of data.
• Use a distributed streaming framework like Apache Kafka or Apache Flink for real-time data processing.

• Implement data partitioning and parallel processing to handle high data throughput.

• Utilize cloud services like AWS Kinesis or Google Cloud Pub/Sub for scalability and reliability.

• Include fault tolerance mechanisms like checkpointing and data repl...read more
Answered by AI
Add your answer

Q1. LLD round , write classes and its methods
Add your answer

Q1. Salary and benefits discussion
Add your answer

Aptitude test is to test the Individual skill

Q1. How many programing language you know
Ans. 
I know multiple programming languages
• I am proficient in Java and Python

• I have basic knowledge of C++ and JavaScript

• I am currently learning Ruby and Swift
Answered by AI
Add your answer

Q1. What are your salary expectations?
Add your answer
Q2. Why should we hire you?
Add your answer
Q3. Tell me about yourself.
Add your answer

Q1. Explian oops concepts
Ans. 
Object-oriented programming concepts that focus on classes and objects for better code organization and reusability.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Ability of a class to inherit properties and behavior from another class.

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

• Abstraction: Hiding the complex implementation det...read more
Answered by AI
Add your answer
Q2. Types of waits in selenium
Ans. 
Types of waits in Selenium include implicit, explicit, and fluent waits.
• Implicit wait: Waits for a certain amount of time before throwing a NoSuchElementException.

• Explicit wait: Waits for a certain condition to occur before proceeding further in the code.

• Fluent wait: Waits for a condition to be true with a specified frequency of checking.

• Example: driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
Answered by AI
Add your answer

Q1. Salary dsicussion
Add your answer
Q2. Previous company details
Add your answer

They give a standard application to develop in mvvm or clean architecture, don't forget to write unit tests

Q1. Mostly discuss on the implementation of the project you've done in round one
Add your answer
Q2. Flutter is addon
Ans. 
Flutter is a UI toolkit for building natively compiled applications for mobile, web, and desktop from a single codebase.
• Flutter is an open-source framework developed by Google.

• It uses the Dart programming language.

• Flutter allows for hot reload, which enables developers to see changes instantly.

• It provides a rich set of pre-built widgets for building user interfaces.

• Flutter can be used to create apps for iOS, Android, w
Answered by AI
Add your answer
Q3. Explain about compose way of thinking.
Ans. 
Compose way of thinking involves breaking down complex problems into smaller, manageable parts and then combining them to create a solution.
• Break down a problem into smaller components

• Solve each component individually

• Combine the solutions to create a complete solution

• Example: Using functions to break down a complex task into smaller functions and then combining them to achieve the desired outcome
Answered by AI
Add your answer
Q4. Difference between presenter and viewmodel
Add your answer
Q5. Explain about lifecycle of view
Ans. 
Lifecycle of view refers to the stages a view goes through from creation to destruction in an application.
• Creation: View is initialized and loaded into memory.

• Layout: View is positioned and sized on the screen.

• Display: View is rendered and displayed to the user.

• Interaction: User interacts with the view through input events.

• Destruction: View is removed from memory when no longer needed.
Answered by AI
Add your answer

Q1. Why you want to join ?
Ans. 
I am excited about the opportunity to work on challenging projects and contribute to a talented team.
• Passionate about software development and problem-solving

• Interested in working on cutting-edge technologies

• Excited about collaborating with a talented team to create innovative solutions
Answered by AI
Add your answer

Linkedlist, tree, logical