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7 Step Roadmap for Data Analyst

1. Maths and Statistics
2. Microsoft Excel
3. SQL
4. Python
5. Data Visualization
6. BI Tools
7. Make resume, GitHub profile, LinkedIn profile & prepare for interviews

@javascript_resources

#DataAnalyst #python

SQL, NoSQL, or something else—how do you decide which database?

The performance of your application can suffer if you choose the incorrect database type, and going back on a bad choice can be time-consuming and expensive.

Before we dive into the factors to take into account when choosing an appropriate database, let’s examine the characteristics of the most widely used databases.

In a 𝗿𝗲𝗹𝗮𝘁𝗶𝗼𝗻𝗮𝗹 𝗱𝗮𝘁𝗮𝗯𝗮𝘀𝗲, data is organized in rows and columns where a row represents a record and its data fields are stored in columns. They are ideal for when ACID compliance is required, and a predefined schema can be created.

With 𝗰𝗼𝗹𝘂𝗺𝗻𝗮𝗿 𝗱𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀, records are stored as columns rather than rows. This makes them very performant for analytical purposes where complex queries are run across large datasets; especially those that contain aggregate functions.

In a 𝗱𝗼𝗰𝘂𝗺𝗲𝗻𝘁 𝗱𝗮𝘁𝗮𝗯𝗮𝘀𝗲, data is stored in a semi-structured format such as JSON. They offer a flexible and schema-less approach which makes them a great choice for data with complex or continually changing structures.

𝗚𝗿𝗮𝗽𝗵 𝗱𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀 are optimized for storing and querying highly connected data. Records are represented as nodes and relationships as edges. Under the hood, they use graph theory to traverse relationships between nodes to power performant queries.

𝗞𝗲𝘆-𝘃𝗮𝗹𝘂𝗲 𝘀𝘁𝗼𝗿𝗲𝘀 are a simple form of storage where values are inserted, updated, and retrieved using a unique key. They are more commonly used for small datasets and often temporary purposes such as caching or session management.

𝗧𝗶𝗺𝗲-𝘀𝗲𝗿𝗶𝗲𝘀 𝗱𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀 are ideal for time-stamped data that are queried and analyzed in relation to time. They provide built-in time-based functions that assist in analyzing large datasets over time.

Each database type has been optimized for specific use cases.

It's important to thoroughly consider the correct database for your use case as it can impact your application’s performance.

Below are considerations that should be made:

🔸 How structured is your data?
🔸 How often will the schema change?
🔸 What type of queries do you need to run?
🔸 How large is your dataset and do you expect it to grow?
🔸 How large is each record?
🔸What is the nature of the operations you need to run? Is it read-heavy or write-heavy?

Use these questions as a starting point for your analysis. Take the time to investigate your use case and ask questions to your stakeholders and end-users when necessary.

It's important to invest as much time in this decision as needed. Choosing the wrong database type can be detrimental to your application’s performance, and difficult to reverse.

Copy and paste these ChatGPT prompts to land your dream job

1. Networking on LinkedIn for Job Opportunity:

Prompt:

Create a message to connect with a professional at [Company] on LinkedIn, discussing my interest in the [Title] position and how my background in [Specific Field/Technology] makes me a strong candidate.

2. Write a Cover Letter:

Prompt:

Write a cover letter for the role of [Title] at [Company], emphasizing my experience in [Specific Field/Technology]. Mention how my contributions at [Previous Company] align with the job requirements: <Copy/paste job description>.

3. Write a Resume from Scratch:

Prompt -

Write resume for [Title] at [company], [X] years of experience, 3-5 bullet points per role and include 10 key job description keywords. Past titles: [Company A-Y years, Company B-Z years].
<Copy/paste job description>.

4. Check if Resume match with Job Description

Prompt -

Review if my skills and the job description for the [Title] position at [Company] match? Tell mismatch percentage.
Job description: [paste text/link]
My Skills: [Add your Skills]

5. Update Resume

Prompt -

Update my resume for the [Title] role at [Company] by focusing on relevant skills mentioned in the job description.
Job Description: [copy/paste job description]
Current Resume: [copy/ paste current resume]

6. Email to send Resume and Cover Letter

Prompt -

Compose an email to send my resume and cover letter for the [Title] position at [Company] to an employer: [employer email], highlight my key achievements at [Previous Company] and express my enthusiasm for the role.

7. Prepare for Interview

Prompt -

Provide me a list of [number] interview questions based on job description. Job description: [paste text/link]

8. Conduct a Mock Interview

Prompt -

Conduct a technical mock interview for the [Job Role]. I am applying for this position. Ask me 15 questions related to [Specific Field/Technology], one after the other, gauging my expertise.

9. Introduce Yourself

Prompt -

Prepare a brief introduction about myself focusing on my experiences in [Specific Field/Technology] for the [Title] interview at [Company].

10. Follow-up Email

Prompt -

Craft a follow-up email to inquire about the status of your application for the [Title] role at [Company].

2024 REACT FOLDER STRUCTURE TEMPLATE

/src
|-- /assets
| |-- /images
| |-- /styles
| |-- styles.css
|
|-- /components
| |-- /Common
| |-- Header.js
| |-- Footer.js
| |-- /Feature
| |-- FeatureComponent.js
|
|-- /containers
| |-- MainContainer.js
| |-- AnotherContainer.js
|
|-- /services
| |-- api.js
| |-- authService.js
|
|-- /utils
| |-- helperFunctions.js
|
|-- /pages
| |-- HomePage.js
| |-- AboutPage.js
|
|-- App.js
|-- index.js
|-- /redux
| |-- /actions
| |-- /reducers
| |-- store.js
|
|-- /tests
| |-- unit
| |-- Component.test.js
| |-- integration
| |-- IntegrationTest.js
|
|-- /config
| |-- config.js
|
|-- /hooks
| |-- useCustomHook.js
|
|-- /constants
| |-- actionTypes.js
| |-- apiEndpoints.js
|
|-- .gitignore
|-- package.json
|-- README.md
|-- babel.config.js
|-- webpack.config.js

Explanation:
src: This is the root of your application source code.

assets: Store static assets such as images and global styles here.

components: Reusable UI components. Group them by feature or function.

containers: Higher-level components that contain and manage state for other components.

services: API calls, authentication services, etc.

utils: Helper functions and utilities.

pages: Top-level components representing pages or views in your application.

redux: Redux-related files (actions, reducers, store).

tests: Unit and integration tests.

config: Configuration files.

hooks: Custom React hooks.

constants: Constant values like action types or API endpoints.

IF YOU WANT TO BECOME A REACT DEV READ THIS

Prerequisites:
Basic Web Development Knowledge:HTML5 🌐
CSS3 🎨
JavaScript (ES6+) 🚀

Node.js and npm: Understand Node.js and npm (Node Package Manager) 📦

Roadmap:

1. Core React Concepts:
JSX (JavaScript XML):Learn to write JSX, a syntax extension for JavaScript used with React. 💻

Components:Understand functional components.
Learn about class components.
Explore the concept of state and props. 🧩

Lifecycle Methods:Familiarize yourself with lifecycle methods in class components.

Understand the useEffect hook in functional components. ⏳

2. React Router:
Learn to implement client-side routing in React apps

3. State Management:
React Hooks:Master essential hooks like useState, useEffect, useContext, etc.

Understand the concept of custom hooks. 🎣

State Management Libraries :Learn state management libraries like Redux or Zustand. 📚

4. Forms in React:
Understand controlled components.
Learn to handle form submissions in React. 📝

5. API Calls:
Learn how to make API calls in React applications.
Understand asynchronous JavaScript, promises, and async/await. 🌐

6. Styling in React:
Explore various styling approaches (CSS-in-JS libraries, styled-components, Tailwind etc.).

Learn to manage styles in a React application. 💅

7. Testing:
Understand testing libraries like Jest and testing-library/react.

Write unit tests for React components. 🧪

8. Advanced Concepts:
Higher-Order Components (HOCs):Learn about HOCs and their usage. 🔄

Render Props:Understand the render props pattern. 🎭

Suspense and Lazy Loading:Explore React Suspense and lazy loading for optimizing performance. 🚀⏳

9. Next.js (Optional):
If interested in server-side rendering and other advanced features, learn Next.js. ⚛️

10. State-of-the-Art Practices:
Stay updated on the latest best practices in React development.

11. Projects:
Build small to medium-sized projects to apply your knowledge.

Consider contributing to open-source projects or collaborating on GitHub.
🤝🌐

🚀 Backend Developer Roadmap

Language & Framework:Learn a backend language (e.g., Node.js, Python), and a framework (e.g., Express.js, Django).

Databases:Master SQL (MySQL/PostgreSQL) and NoSQL (MongoDB) databases.

APIs & Web Services:Understand RESTful APIs, and explore GraphQL.

Version Control:Use Git for version control.

Cloud & Deployment:Deploy on AWS, Azure, or Google Cloud.

Security:Implement OAuth, JWT, and follow security best practices.

Testing:Use testing frameworks like Jest, Mocha.

Containers:Learn Docker for containerization.

CI/CD:Set up CI/CD pipelines (e.g., Jenkins, GitLab CI).

Monitoring & Logging:Implement logging (e.g., ELK Stack) and use monitoring tools (e.g., Prometheus).