Coder Baba

essential sql interview questions 1 Explain Order of Execution of SQL query 2 Provide a use case for each of the functions Rank, Dense_Rank & Row_Number 3 Write a query to find the cumulative sum/Running Total 4 Find the Most selling product by sales/ highest Salary of employees 5 Write a query to find the 2nd/nth highest Salary of employees 6 Difference between union vs union all 7 Identify if there any duplicates in a table 8 Scenario based Joins question, understanding of Inner, Left and Outer Joins via simple yet tricky question 9 LAG, write a query to find all those records where the transaction value is greater then previous transaction value 10 Rank vs Dense Rank, query to find the 2nd highest Salary of employee ( Ideal soln should handle ties) 11 Write a query to find the Running Difference (Ideal sol'n using windows function) 12 Write a query to display year on year/month on month growth 13 Write a query to find rolling average of daily sign-ups 14 Write a query to find the running difference using self join (helps in understanding the logical approach, ideally this question is solved via windows function) 15Write a query to find the cumulative sum using self join (helps in understanding the logical approach, ideally this question is solved via windows function #coderbaba #SQLTips follow @coder_baba

Master Expense Management System in C# | One-Shot Full Tutorial https://youtu.be/lX9MLcnjpgE

Master Expense Management System in C# | One-Shot Full Tutorial + Free Code For Members Only👆

💰 Master Expense Management System in VB.NET & SQL Server 📊 | Full Tutorial https://youtu.be/odGyzCKo7E0 #ExpenseManagement #VBNet #SQLServer #ExpenseTracker #DatabaseApp #FinanceApp #DesktopApplication #BudgetingApp #LearnVBNet #ProgrammingTutorial #VisualBasicNet #SQLDatabase #CodingMadeEasy #FinanceTracker #CRUDOperations #DeveloperCommunity #DatabaseDevelopment #AppDevelopment #SQLIntegration #SoftwareProjects

💻 Linux Commands Cheat Sheet 💻 📂 ls: List files and directories in the current directory. Example: ls 📁 cd: Change directory. Example: cd /path/to/directory 📌 pwd: Show the current directory. Example: pwd 📂 mkdir: Create a new directory. Example: mkdir new_directory 🗑 rm: Remove files and directories. Example: rm file.txt 📄 cp: Copy files and directories. Example: cp file.txt /path/to/destination ✏️ mv: Move or rename files and directories. Example: mv file.txt /path/to/destination 📝 touch: Create an empty file. Example: touch file.txt 👀 cat: Display the contents of a file. Example: cat file.txt 🔍 grep: Search for a pattern in a file. Example: grep "pattern" file.txt 🔝 head: Display the first few lines of a file. Example: head file.txt 🔚 tail: Display the last few lines of a file. Example: tail file.txt 🔒 chmod: Change file permissions. Example: chmod 755 file.txt 👤 chown: Change file ownership. Example: chown user:group file.txt 🔗 ln: Create a symbolic link. Example: ln -s /path/to/file link 🔍 find: Search for files and directories. Example: find /path/to/search -name "pattern" 📦 tar: Archive files and directories. Example: tar -czvf archive.tar.gz files/ 📂 unzip: Extract files from a zip archive. Example: unzip archive.zip 📜 man: Access command manuals. Example: man ls 📜 history: View command history. Example: history ⚙️ ps: Show running processes. Example: ps aux ❌ kill: Terminate a process. Example: kill PID 💾 df: Show disk space usage. Example: df -h 📏 du: Check directory sizes. Example: du -sh directory 🔐 scp: Securely copy files between hosts. Example: scp file.txt user@remote:/path/to/destination 🔑 ssh: Connect to a remote host securely. Example: ssh user@host 🌐 ping: Test network connectivity. Example: ping google.com 🖧 ifconfig: Display network interface info. Example: ifconfig 🌐 wget: Download files from the web. Example: wget https://example.com/file.txt 🌐 curl: Transfer data to/from a server. Example: curl https://example.com Follow @coder_baba #coderbaba #CoderBaba #linux

📄 Linux Commands Interview Q&A 🔍 1. What is Linux? 🐧 Linux is an open-source operating system kernel forming the base for various distributions. 🔧 2. Main components of a Linux system? Kernel, shell, and file system. 💻 3. Role of the Linux Kernel? Manages system resources and provides services to applications. 🖥 4. What is a shell? Command-line interpreter for interacting with the OS. 🎉 5. Popular Linux distributions? Ubuntu, Debian, Fedora, CentOS, and Red Hat Enterprise Linux. 🛡 6. Changing file permissions? Use chmod (e.g., chmod 755 filename) to set permissions. 🔎 7. Purpose of the "grep" command? Searches for specific patterns within files. 📁 8. Finding files? Use find command based on criteria like name, size, and permissions. 📊 9. What is the "top" command for? Monitors system processes and resource usage in real-time. 💾 10. Checking disk usage? df command shows disk space usage of file systems. 🔗 11. What is a symbolic link? A soft link pointing to another file or directory. 📦 12. Purpose of the "tar" command? Creates and manipulates archive files. ⚙️ 13. Starting and stopping services? Use systemctl (e.g., systemctl start service_name) in systemd systems. 🌐 14. Purpose of the "ping" command? Tests connectivity between a source and destination. 🌍 15. Checking network configuration? ifconfig or ip command for network settings. 🔐 16. What is SSH? Secure remote login and file transfer using encryption. 🛑 17. Killing a process? kill command with process ID (PID) or killall by name. 🔄 18. Purpose of "rsync"? Efficient file synchronization and transfer. 🔍 19. Checking hardware information? lshw provides detailed hardware info. 🚨 20. What is a firewall? Controls network traffic for security. 📶 21. Checking system IP address? ip addr command displays IPs for network interfaces. ⏰ 22. Purpose of "cron"? Automates and schedules recurring tasks. 📂 23. Mounting a filesystem? mount command attaches a filesystem to the directory tree. 🔄 24. What is "chroot"? Creates a separate environment with its own root directory. 📉 25. Compressing and decompressing files? gzip and gunzip for compression. 🛠 26. Purpose of "iptables"? Configures the kernel firewall for network traffic filtering. 💡 27. Checking CPU usage? Use top, htop, or mpstat. 👤 28. Creating user accounts? useradd command adds new users. 🔍 29. Searching within files? grep -r to search recursively within files in a directory. 💾 30. Checking available memory? free command shows free and used memory in the system. #coderbaba #CoderBaba #Programming #linux

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Complete Data Structures and Algorithms (DSA) using C++ Handwritten Notes: A Comprehensive Guide to Mastering DSA https://topmate.io/coderbaba/984764?coupon_code=Limited-Off-30-Percent