Tech Prescient Interview Questions and Answers

Q1. What is your day-day activities
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Q2. How do you manage your time
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Q3. How do you avoid team conflict
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How do you overcome challenges from client

Q1. Scenario based question on if Elasticsearch fails to start, how to debug and fix it to get it up and running?
Ans. 
Debugging Elasticsearch startup failures involves checking logs, configurations, and system resources.
• Check Elasticsearch logs located in the 'logs' directory for error messages (e.g., 'elasticsearch.log').

• Verify the configuration file (elasticsearch.yml) for syntax errors or incorrect settings.

• Ensure that the JVM version is compatible with the Elasticsearch version being used.

• Check system resources like memory and dis...read more
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Q2. Write a Azure DevOps pipeline to deploy a simple python application to a Azure VM also use terra for to setup a VM and install python on it.
Ans. 
Deploy a Python app on Azure VM using Azure DevOps pipeline and Terraform for VM setup.
• Use Terraform to provision an Azure VM with Python installed.

• Create an Azure DevOps pipeline with stages for build and deployment.

• Use a YAML file for the Azure DevOps pipeline configuration.

• Example Terraform script to create a VM: 'resource "azurerm_linux_virtual_machine" { ... }'

• Use 'az vm run-command invoke' to execute commands on ...read more
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Given task of creating a simple React todo application

Q1. What are props in React and how are they different from state
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Q2. What is purpose of keys in React lists?
Ans. 
Keys in React lists are used to uniquely identify elements and improve performance by helping React identify which items have changed, are added, or are removed.
• Keys help React identify which items have changed, are added, or are removed in a list of elements.

• Keys should be unique among siblings but do not need to be globally unique.

• Using keys improves performance by helping React efficiently update the UI without re-r...read more
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Q3. What is axios and used of interceptors in it?
Ans. 
Axios is a popular JavaScript library for making HTTP requests in web applications. Interceptors are used to intercept and modify HTTP requests and responses.
• Axios is a promise-based HTTP client for the browser and Node.js.

• Interceptors in Axios allow you to run middleware functions before a request is sent or after a response is received.

• Interceptors can be used for logging, authentication, error handling, and more.

• Exa...read more
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Q4. What is useMemo and useCallback hooks
Ans. 
useMemo and useCallback are React hooks used for performance optimization by memoizing values and functions respectively.
• useMemo is used to memoize the result of a function so that it is only recomputed when its dependencies change.

• useCallback is used to memoize a function instance so that it is not recreated on every render unless its dependencies change.

• Both hooks help in optimizing performance by preventing unnecess...read more
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Q5. What are the higher order components?
Ans. 
Higher order components are functions that take a component and return a new component with additional functionality.
• Higher order components are a common pattern in React for code reuse and logic sharing.

• They are used to abstract logic out of components and make them more reusable.

• Examples include withRouter, connect, and withStyles in React.
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Q6. What is callback in JS?
Ans. 
A callback in JS is a function passed as an argument to another function, to be executed later.
• Callback functions are commonly used in event handling, asynchronous programming, and AJAX requests.

• They allow for more flexible and dynamic code execution.

• Example: setTimeout(function(){ console.log('Hello') }, 1000);
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Q1. Explain your past experience
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Q2. Why you want leave current company
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Q1. DSa Basics and Python
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Q1. HLD - Fibonacci Series
Ans. 
Design a system to generate Fibonacci series efficiently.
• Fibonacci series starts with 0 and 1, and each subsequent number is the sum of the previous two.

• Example: The first 10 numbers are 0, 1, 1, 2, 3, 5, 8, 13, 21, 34.

• Can be implemented using recursion, iteration, or dynamic programming.

• For large n, use matrix exponentiation or Binet's formula for efficiency.

• Consider edge cases: n = 0 (output 0), n = 1 (output 0, 1).
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Q1. API related questions
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