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Swapna Kumar Panda ✨

@swapnakpanda

Jan 25

SQL & RDBMS Interview Questions

⇩

Series: 1️⃣
Level: Beginner
Topics:

➊ Introduction to RDBMS
➋ Normalisation
➌ Introduction to SQL
➍ Tables and Fields
➎ Constraints
➏ DML Operations
➐ Joins

🚥 Disclaimer

⬖ The questions covered here are mostly conceptual
⬘ I never claim only these type of questions are/should be asked during interviews
⬗ For interviews, you should have fundamentals strong. And you should be able to provide solutions to practical problems.

Read 13 tweets

Swapna Kumar Panda ✨

@swapnakpanda

Jan 23

💛 CSS: border-radius

Explained with Classic Illustrations

📋 Table of Contents

➊ Introduction
➋ How to specify?
➋.➀ One/Two/Three/Four Values
➋.➁ Percentage Value
➋.➂ Horizontal and Vertical Radius
➌ Other Related Properties
➍ Shapes using border-radius
➎ Conclusion

➊ Introduction

Read 12 tweets

Swapna Kumar Panda ✨

@swapnakpanda

Jan 22

📚 Books you must read for

🛠 DSA
🛢 SQL
🌐 JavaScript

⇩

⬖ Books were and still are the most important medium for our knowledge growth.

⬘ Do you love to read books? How about for technical subjects? If no, I would suggest you should.

⬗ Here, I will list few important ones. If you want to add any, feel free.

🛠 DSA

➊ Grokking Algorithms
✍️ Aditya Bhargava

➋ Introduction to Algorithms
✍️ Thomas H. Cormen ⊕ Charles E. Leiserson ⊕ Ronald L. Rivest ⊕ Clifford Stein

➌ Introduction to Algorithms
✍️ Udi Manber

Read 9 tweets

Swapna Kumar Panda ✨

@swapnakpanda

Jan 21

There may be a "Hole" in your Array

🟪🟪🟪🕳🟪🟪

A JavaScript 🧵

➊ What is a hole?

⬒ Holes are indices “inside” an Array that have no associated element.

⬔ An array with at least a single hole in it is called a "Sparse Array".

⬓ An array without any hole is called a "Dense Array".

➋ How to detect a hole?

Check if

⬙ 0 ≤ index < Array's length
⬘ index is not in the array

Example:

To check if there is a hole at index "2" in "arr" whose length is 5

⇥ !(2 in arr)

Read 13 tweets

Swapna Kumar Panda ✨

@swapnakpanda

Jan 19

💫 100 Inspiring Accounts

If their tweets appeared in your timeline, you would definitely learn something new.

They are experts in

🏙 Web Development
🎑 UI/UX
👩‍💻 Programming
🛢 Database
🛠 System Design
🔩 Machine Learning
🎯 DSA
⛓ Blockchain
🌐 Web3

@traversymedia

{1/6}

@traversymedia
@DThompsonDev
@svpino
@elyktrix
@florinpop1705
@developedbyed
@benawad
@adrian_twarog
@shookcodes
@denicmarko
@_georgemoller
@oliverjumpertz
@vponamariov
@Prathkum
@PrasoonPratham
@UbahTheBuilder
@swapnakpanda

@jackdomleo7

{2/6}

@jackdomleo7
@akoskm
@shrutibalasa
@khushbooverma_
@luciantartea
@MakadiaHarsh
@Insharamin
@SimonHoiberg
@VittoStack
@devinDford
@ANoorTM
@designerSaha
@swastika0015
@eugZolotarenko
@SuhailKakar
@saviomartin7
@mdjunaidap

Read 8 tweets

Swapna Kumar Panda ✨

@swapnakpanda

Jan 18

How is "Divide by Zero" handled in JavaScript?

🧵

➊ Why is "Divide by Zero" special?

Let's say

a ÷ 0 = y
⇒ a = y × 0
⇒ a = 0

It means

⬔ a non-zero number can never be divided by zero

⬕ as any number multiplied by zero is zero, 0 ÷ 0 is also indeterminate

➋ How do programming languages handle it?

❑ As we saw above, division by zero in every scenario is indeterminate.

❒ Many programming languages consider it a special case and throws error/exception at runtime.

❑ To handle, we need to catch the error.

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