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+ operator will first convert the string to a numeric value. so "0" -> 0 after that, it's post incrementing, so it will not increment thus output will remain 0 P.S : There are two types of increment (post & pre) Post (a++) will print first then increment Pre (++a) will increment first then print

Syntax Error!!! Cause you can't declare the same variable two times. The variable num is declared twice within the same scope: once using var and then using let. Redeclaring a variable with let or const in the same scope is not allowed, leading to a syntax error.

Database keys Database keys are essential for organizing and managing data effectively. In this post, we'll explore ten key concepts that every IT professional should know. 1. 🗝 𝗣𝗿𝗶𝗺𝗮𝗿𝘆 𝗞𝗲𝘆 - A unique identifier for each record in a table. - Cannot be null. - Ensures that each row is unique. 2. 🌉 𝗙𝗼𝗿𝗲𝗶𝗴𝗻 𝗞𝗲𝘆 - A field in one table that refers to the Primary Key of another table. - Establishes relationships between tables. 3. 🧩 𝗖𝗼𝗺𝗽𝗼𝘀𝗶𝘁𝗲 𝗞𝗲𝘆 - A combination of two or more columns that uniquely identifies each record. - Useful when a single column can't uniquely identify a record. 4. 💪 𝗦𝘂𝗽𝗲𝗿 𝗞𝗲𝘆 - One or more columns that can uniquely identify a record. - A Primary Key is a type of Super Key. 5. 🏅 𝗖𝗮𝗻𝗱𝗶𝗱𝗮𝘁𝗲 𝗞𝗲𝘆 - A column or set of columns that could be the Primary Key. - Must be unique. 6. 🔍 𝗨𝗻𝗶𝗾𝘂𝗲 𝗞𝗲𝘆 - Ensures uniqueness for a column or column combination. - Similar to Primary Key but allows one null value. 7. 🛤 𝗔𝗹𝘁𝗲𝗿𝗻𝗮𝘁𝗲 𝗞𝗲𝘆 - A Candidate Key that isn't the Primary Key. - Another option for a unique identifier. 8. 🍃 𝗡𝗮𝘁𝘂𝗿𝗮𝗹 𝗞𝗲𝘆 - A key that's a natural part of the data, like an email address. 9. 🎭 𝗦𝘂𝗿𝗿𝗼𝗴𝗮𝘁𝗲 𝗞𝗲𝘆 - An artificial key created when no natural unique identifier exists. 10. 🔑 𝗦𝗲𝗰𝗼𝗻𝗱𝗮𝗿𝘆 𝗞𝗲𝘆 - Used for data retrieval, not identification. - Helps create non-clustered indexes.

What is an OSI model

CI/CD Workflow

Apple pay and Google pay Security

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bug , setTime out is asynchronous

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How Redis Architecture Evolves?

Common Programming Interview Questions How do you reverse a string? How do you determine if a string is a palindrome? How do you calculate the number of numerical digits in a string? How do you find the count for the occurrence of a particular character in a string? How do you find the non-matching characters in a string? How do you find out if the two given strings are anagrams? How do you calculate the number of vowels and consonants in a string? How do you total all of the matching integer elements in an array? How do you reverse an array? How do you find the maximum element in an array? How do you sort an array of integers in ascending order? How do you print a Fibonacci sequence using recursion? How do you calculate the sum of two integers? How do you find the average of numbers in a list? How do you check if an integer is even or odd? How do you find the middle element of a linked list? How do you remove a loop in a linked list? How do you merge two sorted linked lists? How do you implement binary search to find an element in a sorted array? How do you print a binary tree in vertical order? What is a data structure? What is an array? What is a linked list? What is the difference between an array and a linked list? What is LIFO? What is FIFO? What is a stack? What are binary trees? What are binary search trees? What is object-oriented programming? What is the purpose of a loop in programming? What is a conditional statement? What is debugging? What is recursion? What are the differences between linear and non-linear data structures? General Coding Interview Questions What programming languages do you have experience working with? Describe a time you faced a challenge in a project you were working on and how you overcame it. Walk me through a project you’re currently or have recently worked on. Give an example of a project you worked on where you had to learn a new programming language or technology. How did you go about learning it? How do you ensure your code is readable by other developers? What are your interests outside of programming? How do you keep your skills sharp and up to date? How do you collaborate on projects with non-technical team members? Tell me about a time when you had to explain a complex technical concept to a non-technical team member. How do you get started on a new coding project?

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