Top 5 Coding Challenge
Platforms for Programmers 👩💻🚀
1. LeetCode
- URL: https://leetcode.com
- Description: Enhance problem-solving skills with a vast collection of coding challenges on LeetCode.
2. HackerRank
- URL: https://www.hackerrank.com
- Description: HackerRank offers diverse coding challenges for algorithm, data structure, and language proficiency improvement.
3. CodeSignal
- URL: https://codesignal.com
- Description: CodeSignal provides coding challenges and assessments to enhance coding skills for interviews and practice.
4. Codewars
- URL: https://www.codewars.com
- Description: Codewars engages developers in creative problem-solving through kata challenges, fostering skill development.
5. Exercism
- URL: https://exercism.io
- Description: Exercism offers coding exercises in various languages, providing mentorship and community support.
Platforms for Programmers 👩💻🚀
1. LeetCode
- URL: https://leetcode.com
- Description: Enhance problem-solving skills with a vast collection of coding challenges on LeetCode.
2. HackerRank
- URL: https://www.hackerrank.com
- Description: HackerRank offers diverse coding challenges for algorithm, data structure, and language proficiency improvement.
3. CodeSignal
- URL: https://codesignal.com
- Description: CodeSignal provides coding challenges and assessments to enhance coding skills for interviews and practice.
4. Codewars
- URL: https://www.codewars.com
- Description: Codewars engages developers in creative problem-solving through kata challenges, fostering skill development.
5. Exercism
- URL: https://exercism.io
- Description: Exercism offers coding exercises in various languages, providing mentorship and community support.
Leetcode
LeetCode - The World's Leading Online Programming Learning Platform
Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview.
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If you design complex systems, you'll love sequence diagrams
Complex system architectures can quickly become tangled and hard to follow. Enter sequence diagrams! They keep your design neat and easily understandable.
For example, check out the diagram below. It depicts a client/server interaction, clearly differentiating between a cache hit and a cache miss. This is a prime example of how visual aids simplify complex interactions.
Sequence diagrams are a must when you aim to:
- 🚀 Map out end-to-end system workflows.
- 🔍 Clarify interactions between components.
- 📚 Produce clear and concise documentation.
- 🔧 Identify design flaws.
I have two favorites for creating sequence diagrams. WebSequenceDiagrams and Mermaid (links in comment). You can make sequence diagrams easily with just text.
Do you have a go-to tool for crafting good-looking sequence diagrams? Drop your suggestions below! 👇
Complex system architectures can quickly become tangled and hard to follow. Enter sequence diagrams! They keep your design neat and easily understandable.
For example, check out the diagram below. It depicts a client/server interaction, clearly differentiating between a cache hit and a cache miss. This is a prime example of how visual aids simplify complex interactions.
Sequence diagrams are a must when you aim to:
- 🚀 Map out end-to-end system workflows.
- 🔍 Clarify interactions between components.
- 📚 Produce clear and concise documentation.
- 🔧 Identify design flaws.
I have two favorites for creating sequence diagrams. WebSequenceDiagrams and Mermaid (links in comment). You can make sequence diagrams easily with just text.
Do you have a go-to tool for crafting good-looking sequence diagrams? Drop your suggestions below! 👇
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📞 0941056868|0935559335|0988249084
🇪🇹 We got u covered.
🇪🇹 Unleash Your Creative Genius with our practical Training Programs.
✔️ Graphics Design
✔️ Digital Marketing
✔️ Full Stack Web Application Development with MERN Stack
🔥 🔥 Why Choose Our Training? 🔥 🔥
✨ Industry-Driven Curriculum
👩🏫 Expert Instructors
🤝 Hands-On Experience with Project orientated approach
🇪🇹 Ready to embark on a transformative learning journey?
🇪🇹 Join us and become a trailblazer in the digital world!
🇪🇹 Enroll now for a future filled with limitless possibilities."
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🇪🇹 Web Development: Evening & Weekend in class & online
🇪🇹 Graphics Design: Monday, Wednesday & Friday: in class & online.
🇪🇹 Digital Marketing: Tuesday, Thursday & Saturday: Evening online.
🇪🇹 Address: Arat Kilo near Abrehot Library, Tesnim Building 6th floor.
www.ethiopbytes.com
📞 0941056868|0935559335|0988249084
Looking to become a professional Graphics Designer and Web App Developer?
🇪🇹 We got u covered.
🇪🇹 Unleash Your Creative Genius with our practical Training Programs.
✔️ Graphics Design
✔️ Digital Marketing
✔️ Full Stack Web Application Development with MERN Stack
🔥 🔥 Why Choose Our Training? 🔥 🔥
✨ Industry-Driven Curriculum
👩🏫 Expert Instructors
🤝 Hands-On Experience with Project orientated approach
🇪🇹 Ready to embark on a transformative learning journey?
🇪🇹 Join us and become a trailblazer in the digital world!
🇪🇹 Enroll now for a future filled with limitless possibilities."
🇪🇹 enroll now! 👇🏾👇🏾
🇪🇹 Web Development: Evening & Weekend in class & online
🇪🇹 Graphics Design: Monday, Wednesday & Friday: in class & online.
🇪🇹 Digital Marketing: Tuesday, Thursday & Saturday: Evening online.
🇪🇹 Address: Arat Kilo near Abrehot Library, Tesnim Building 6th floor.
www.ethiopbytes.com
📞 0941056868|0935559335|0988249084
🇪🇹 We got u covered.
🇪🇹 Unleash Your Creative Genius with our practical Training Programs.
✔️ Graphics Design
✔️ Digital Marketing
✔️ Full Stack Web Application Development with MERN Stack
🔥 🔥 Why Choose Our Training? 🔥 🔥
✨ Industry-Driven Curriculum
👩🏫 Expert Instructors
🤝 Hands-On Experience with Project orientated approach
🇪🇹 Ready to embark on a transformative learning journey?
🇪🇹 Join us and become a trailblazer in the digital world!
🇪🇹 Enroll now for a future filled with limitless possibilities."
🇪🇹 enroll now! 👇🏾👇🏾
🇪🇹 Web Development: Evening & Weekend in class & online
🇪🇹 Graphics Design: Monday, Wednesday & Friday: in class & online.
🇪🇹 Digital Marketing: Tuesday, Thursday & Saturday: Evening online.
🇪🇹 Address: Arat Kilo near Abrehot Library, Tesnim Building 6th floor.
www.ethiopbytes.com
📞 0941056868|0935559335|0988249084
DevOps is a set of practices that combines software development and IT operations. It aims to shorten the software development life cycle and provide continuous delivery with high software quality. 🚀
DevOps has several phases
Plan: This phase involves defining the goals, scope, and requirements of the software project. It also includes identifying the stakeholders, risks, and resources needed. 📝
Build: This phase involves writing, compiling, and packaging the code into executable units. It also includes using version control, code review, and configuration management tools. 🔧
Test: This phase involves verifying that the software meets the quality standards and functional specifications. It also includes using automated testing, performance testing, and security testing tools. 🧪
Deploy: This phase involves releasing the software to the production environment or to the end-users. It also includes using deployment automation, orchestration, and monitoring tools. 🚚
Operate: This phase involves running and maintaining the software in the production environment. It also includes using incident management, problem management, and change management tools. 🛠
Observe: This phase involves collecting and analyzing data from the software and the production environment. It also includes using logging, tracing, and metrics tools. 🔎
Continuous Feedback and Discovery: This phase involves gathering feedback from the stakeholders, users, and customers. It also includes using feedback loops, surveys, and analytics tools. It also involves discovering new opportunities, challenges, and trends. 📊
DevOps is a culture that promotes collaboration, communication, and continuous improvement. It helps to deliver software faster, better, and safer. 😊
DevOps has several phases
Plan: This phase involves defining the goals, scope, and requirements of the software project. It also includes identifying the stakeholders, risks, and resources needed. 📝
Build: This phase involves writing, compiling, and packaging the code into executable units. It also includes using version control, code review, and configuration management tools. 🔧
Test: This phase involves verifying that the software meets the quality standards and functional specifications. It also includes using automated testing, performance testing, and security testing tools. 🧪
Deploy: This phase involves releasing the software to the production environment or to the end-users. It also includes using deployment automation, orchestration, and monitoring tools. 🚚
Operate: This phase involves running and maintaining the software in the production environment. It also includes using incident management, problem management, and change management tools. 🛠
Observe: This phase involves collecting and analyzing data from the software and the production environment. It also includes using logging, tracing, and metrics tools. 🔎
Continuous Feedback and Discovery: This phase involves gathering feedback from the stakeholders, users, and customers. It also includes using feedback loops, surveys, and analytics tools. It also involves discovering new opportunities, challenges, and trends. 📊
DevOps is a culture that promotes collaboration, communication, and continuous improvement. It helps to deliver software faster, better, and safer. 😊
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for registration: www.ethiopbytes.com. reserve your seat now
Computer Memory Explained
Computer memory is like a workspace for your computer. It stores data and instructions that the computer needs to access quickly.
Internal Memory:
1. ROM (Read-Only Memory):
- PROM (Programmable ROM): Programmable once by the user post-manufacturing. 🖊
- EPROM (Erasable Programmable ROM): Can be erased with ultraviolet light and reprogrammed. ☀️🔁
- EEPROM (Electrically Erasable Programmable ROM): Can be erased and reprogrammed electrically, multiple times. ⚡️
2. RAM (Random Access Memory):
- SRAM (Static RAM): Retains data as long as power is supplied, no need to refresh, faster than DRAM. ⚡️💨
- DRAM (Dynamic RAM): Stores data in capacitors that must be refreshed periodically, widely used. 🔄
- SDRAM (Synchronous DRAM): Syncs with CPU clock speed for improved performance. ⏱
- RDRAM (Rambus DRAM): High bandwidth memory with Rambus technology. 🚀
- DDR SDRAM (Double Data Rate SDRAM): Transfers data on both rising and falling clock edges.
- DDR1: First generation, higher speed and bandwidth than SDRAM. 🆕
- DDR2: Improved version of DDR1 with lower power consumption and higher speeds. 🔋💨
- DDR3: Higher speeds and reduced power consumption over DDR2. 🔋➕💨
- DDR4: Higher module density and increased performance with reduced voltage. 🔋🆙🎛
External Memory:
1. HDD (Hard Disk Drive): Uses spinning disks to read/write data, traditional storage device. 🔄💾
2. SSD (Solid State Drive): Non-volatile flash memory for faster speed than HDDs. 🚀💾
3. CD (Compact Disc): Optical disc for storing digital data, used for music and software
Computer memory is like a workspace for your computer. It stores data and instructions that the computer needs to access quickly.
Internal Memory:
1. ROM (Read-Only Memory):
- PROM (Programmable ROM): Programmable once by the user post-manufacturing. 🖊
- EPROM (Erasable Programmable ROM): Can be erased with ultraviolet light and reprogrammed. ☀️🔁
- EEPROM (Electrically Erasable Programmable ROM): Can be erased and reprogrammed electrically, multiple times. ⚡️
2. RAM (Random Access Memory):
- SRAM (Static RAM): Retains data as long as power is supplied, no need to refresh, faster than DRAM. ⚡️💨
- DRAM (Dynamic RAM): Stores data in capacitors that must be refreshed periodically, widely used. 🔄
- SDRAM (Synchronous DRAM): Syncs with CPU clock speed for improved performance. ⏱
- RDRAM (Rambus DRAM): High bandwidth memory with Rambus technology. 🚀
- DDR SDRAM (Double Data Rate SDRAM): Transfers data on both rising and falling clock edges.
- DDR1: First generation, higher speed and bandwidth than SDRAM. 🆕
- DDR2: Improved version of DDR1 with lower power consumption and higher speeds. 🔋💨
- DDR3: Higher speeds and reduced power consumption over DDR2. 🔋➕💨
- DDR4: Higher module density and increased performance with reduced voltage. 🔋🆙🎛
External Memory:
1. HDD (Hard Disk Drive): Uses spinning disks to read/write data, traditional storage device. 🔄💾
2. SSD (Solid State Drive): Non-volatile flash memory for faster speed than HDDs. 🚀💾
3. CD (Compact Disc): Optical disc for storing digital data, used for music and software
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How Git Works - From Working Directory to Remote Repository
[1]. Working Directory:
Your project starts here. The working directory is where you actively make changes to your files.
[2]. Staging Area (Index):
After modifying files, use git add to stage changes. This prepares them for the next commit, acting as a checkpoint.
[3]. Local Repository:
Upon staging, execute git commit to record changes in the local repository. Commits create snapshots of your project at specific points.
[4]. Stash (Optional):
If needed, use git stash to temporarily save changes without committing. Useful when switching branches or performing other tasks.
[5]. Remote Repository:
The remote repository, hosted on platforms like GitHub, is a version of your project accessible to others. Use git push to send local commits and git pull to fetch remote changes.
[6]. Remote Branch Tracking:
Local branches can be set to track corresponding branches on the remote. This eases synchronization with git pull or git push.
[1]. Working Directory:
Your project starts here. The working directory is where you actively make changes to your files.
[2]. Staging Area (Index):
After modifying files, use git add to stage changes. This prepares them for the next commit, acting as a checkpoint.
[3]. Local Repository:
Upon staging, execute git commit to record changes in the local repository. Commits create snapshots of your project at specific points.
[4]. Stash (Optional):
If needed, use git stash to temporarily save changes without committing. Useful when switching branches or performing other tasks.
[5]. Remote Repository:
The remote repository, hosted on platforms like GitHub, is a version of your project accessible to others. Use git push to send local commits and git pull to fetch remote changes.
[6]. Remote Branch Tracking:
Local branches can be set to track corresponding branches on the remote. This eases synchronization with git pull or git push.
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Class will start on MARCH 9, 2024.
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To register, www.ethiopbytes.com
Only 1 day left for registration:
Apply here: www.ethiopbytes.com
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UNTANGLE Spring Security Architecture 🔒
Authentication and Authorization:
- Validates user identity and orchestrates controlled resource access.
- Empowers comprehensive user authentication and nuanced authorization.
Security Filters:
- Intercepts incoming requests, meticulously enforcing security measures.
- Offers a flexible, layered security filter chain for diverse protection strategies.
Custom Authentication Providers:
- N Authentication Provider: Extends authentication capabilities beyond default configurations. Facilitates tailored authentication strategies and seamless integration.
- DaoAuthentication Provider: Adopts a database-backed approach for user authentication. Scrutinizes user credentials against stored records, heightening security.
Authentication Manager:
- Orchestrates the authentication process, coordinating various authentication providers.
- Serves as a pivotal component in managing user identity verification.
Token-based Security (JWT):
- Implements advanced token-based authentication for stateless communication.
- Facilitates secure interaction without the need for server-side storage.
Session Management:
- Efficiently manages user sessions, mitigating session-related risks.
- Provides adaptability for session creation, tracking, and invalidation.
Authentication Tokens:
- Username Password Authentication Token:Represents user credentials for authentication purposes.
- Leverages usernames and passwords for robust user verification.
Add/Remove Authentication Token:
- Dynamically enables the addition and removal of authentication tokens.
- Ensures real-time control over user authentication, promoting flexibility.
Authentication and Authorization:
- Validates user identity and orchestrates controlled resource access.
- Empowers comprehensive user authentication and nuanced authorization.
Security Filters:
- Intercepts incoming requests, meticulously enforcing security measures.
- Offers a flexible, layered security filter chain for diverse protection strategies.
Custom Authentication Providers:
- N Authentication Provider: Extends authentication capabilities beyond default configurations. Facilitates tailored authentication strategies and seamless integration.
- DaoAuthentication Provider: Adopts a database-backed approach for user authentication. Scrutinizes user credentials against stored records, heightening security.
Authentication Manager:
- Orchestrates the authentication process, coordinating various authentication providers.
- Serves as a pivotal component in managing user identity verification.
Token-based Security (JWT):
- Implements advanced token-based authentication for stateless communication.
- Facilitates secure interaction without the need for server-side storage.
Session Management:
- Efficiently manages user sessions, mitigating session-related risks.
- Provides adaptability for session creation, tracking, and invalidation.
Authentication Tokens:
- Username Password Authentication Token:Represents user credentials for authentication purposes.
- Leverages usernames and passwords for robust user verification.
Add/Remove Authentication Token:
- Dynamically enables the addition and removal of authentication tokens.
- Ensures real-time control over user authentication, promoting flexibility.
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