शैडोइंग अभ्यास: The Most Confused Concepts in Engineering - वीडियो के साथ अंग्रेजी बोलना सीखें

अभ्यास मोड चुनें

हर मोड पूरी स्क्रीन का अभ्यास कक्ष खोलता है।

80 वाक्य

यदि वाक्य बहुत छोटे या लंबे हों, तो समायोजित करने के लिए Edit पर क्लिक करें।

Think back to the last time when you were searching something on Google.

If you notice your browser bar, you may see something like this.

If we look carefully, we can see that the spaces are actually replaced by person 20, and question mark is replaced by person 3f.

The browser somehow transformed our query into something different.

Why?

Because the URLs are allowed to have only a limited number of characters, and in that character set, characters like space are not valid.

but it still needs to be sent, and therefore it is converted into something that belongs to the allowed character set.

This type of transformation of data from one form to another, for the purpose of storage or transmission, is called encoding.

And similar to this, the data can be encoded to other forms as well.

For example, the text hello can be converted into many different forms, for example binary, hexadecimal, or base64.

The encoding is not only limited to transmitting data, but has other uses as well.

For example, if you work on the front-end with CSS, you might have seen the color codes which have the RGB values.

Those values are usually written in hexadecimal for its compact nature.

In decimal, the same value would look like this.

Similarly, in HTML, you may have seen the image stack to add images to your page, which refer to the URL where the image resides.

While this is fine for large images, The lighter images can be directly embedded in the Base64 format via HTML or CSS to save a network call.

The key point to understand here is that encoding is reversible.

For example, anyone who sees person 20 can decode it back to a space.

It's about data representation, not security.

And speaking of security, let's talk a bit about hashing.

Whenever you create an account online, your password is never stored in plain text.

Instead, it's converted into a fixed-length string of characters, which could look like this.

From this string alone, it is impossible to construct the original password again, and this type of transformation is possible by a process called hashing.

Hashing is a process where you convert data into another irreversible form by the use of a hashing algorithm, which does some complex math behind the scenes to achieve this.

So when you login, the password that you enter is hashed again and compared with the hash that exists in the system.

If they are same, the login is successful.

Hashing is defined by three main things.

First, that it is one way.

You can't reverse a hash to retrieve the original input.

Second, it is deterministic.

The same input always produces the same hash.

And third, is that it is always of fixed length.

So, no matter how long your password is, the hash always will be of the same size.

Hashing is not only used in passwords, but it has other applications as well.

For example, in file downloads.

If the downloaded file is corrupt, its hash would be different from the original file.

Whereas if the downloaded file is intact, its hash would be the same as original file.

If you're intrigued by hashing, check out my deep dive video on what is hashing, to learn about different hashing algorithms and hash collisions.

Now, what if you need that one-way transformation to be two-way, but only for some selected people or systems?

That's where encryption comes in.

Imagine that you have a top-secret document on your computer.

Anyone with access to your machine can open and read it.

Encryption provides a way to transform your document or data into a form

that can only be reversed by the use of a key.

So whoever holds the key can access the data.

If someone tries to open it without the key, they'll only see gibberish.

Let's take a simple example of encryption, one that dates back over 2000 years.

Julius Caesar used a basic encryption technique to protect messages of military importance.

It's now famously known as Caesar's cipher, or the shift cipher.

The idea?

Shift each letter of the message by a fixed number of positions in the alphabet.

say 3.

So if we take the word hello and shift each letter by 3, H becomes K, E becomes H,

L becomes O, the next L also becomes O, and O becomes R.

That gives us KHOOR.

To anyone who intercepts this message without knowing the shift, it looks like gibberish.

But if the recipient knows that each letter was shifted by 3, they can just reverse the shift and decrypt the message back to hello.

This kind of encryption is laughably easy to crack today, especially with modern computers.

But it beautifully illustrates the core idea.

The message is only readable to someone who has the key.

Modern encryption is, let's just say, a bit more advanced.

Instead of the letter shifts, we now use complex mathematical algorithms that are designed to be unbreakable by brute force, at least with current computers.

Quantum computing might change that, but that's a topic for another video.

Take WhatsApp, for example.

Every message that you send is encrypted on your device before it even leaves your phone.

If someone tries to snoop on the network, all they see is garbled nonsense.

Only the person that you are messaging with the matching decryption key can turn that noise back into actual words.

That's encryption, locking your data in such a way that only the right key can unlock it.

To put it all together, encoding is like translating data into another format so computers can store or transmit it properly.

It's not about secrecy, it's about structure and readability.

And yes, it is completely reversible.

Some examples are UTF-8, binary, hexadecimal, and base64.

Hashing takes your data and runs it through a special formula to create a unique, fixed-length code.

This code doesn't reveal the original data, and you cannot convert it back.

That's why it's perfect for safely storing passwords or checking if a file has been tampered with.

If the data changes, the hash changes too.

Encryption is about confidentiality.

It transforms your data into something unreadable, but only temporarily.

Because unlike hashing, encryption is reversible if and only if you have the right key.

That's how secure messaging apps like WhatsApp protect your conversations even from their own servers.

ऐप डाउनलोड करें

धाराप्रवाह बोलने के लिए ज़रूरी सब कुछ

AI उच्चारण स्कोरहर वाक्य का स्कोर

IPA अभ्यासहर ध्वनि में महारत

शब्दावलीअपना शब्द भंडार बनाएँ

शब्द गेमखेलते हुए सीखें

QR स्कैन करें

Download on theApp Store Get it onGoogle Play

FOR YOU

अनुशंसित वीडियो

101 वाक्य

Understand search engine optimization (SEO) | Google Digital Marketing & E-commerce Certificate

Business EnglishUniversity StudentsWorking Adults

25 वाक्य

DNS Explained in 100 Seconds

Business EnglishUniversity StudentsWorking Adults

इस पाठ के बारे में

इस वीडियो में, आप एंरजीनियरिंग के कुछ भ्रमित करने वाले विचारों के बारे में जानेंगे। विशेष रूप से, हम डेटा के एन्कोडिंग, हैशिंग और एन्क्रिप्शन के उपयोगों पर ध्यान केंद्रित करेंगे। इन अवधारणाओं को समझना केवल तकनीकी ज्ञान के लिए नहीं है, बल्कि आपके अंग्रेजी बोलने के अभ्यास के लिए भी महत्वपूर्ण है। जब आप इन शब्दों और अवधारणाओं के साथ अभिप्रेरणा से संवाद करेंगे, तो आप अपनी अंग्रेजी में आत्मविश्वास महसूस करेंगे।

मुख्य शब्दावली और वाक्यांश

एन्कोडिंग - डेटा को एक रूप से दूसरे रूप में परिवर्तित करना।
हैशिंग - डेटा को अपरिवर्तनीय रूप में बदलना।
एन्क्रिप्शन - डेटा को एक कुंजी के माध्यम से पुनः प्राप्त करने योग्य रूप में परिवर्तित करना।
उपयोगी कैरेक्टर्स - डेटा भेजने के लिए वैध अक्षर सेट का उपयोग करना।
सुरक्षा - डेटा की सुरक्षा के लिए एन्क्रिप्शन का उपयोग।
सीज़र सिफर - एक सरल एन्क्रिप्शन तकनीक।

अभ्यास सुझाव

वीडियो में विचारों की गति और टोन को समझने के लिए, आपको अंग्रेजी शैडोइंग तकनीक का उपयोग करने की सलाह दी जाती है। पहले, वीडियो को ध्यान से सुनें और प्रमुख अवधारणाओं को समझें। फिर, shadowspeaks के माध्यम से वीडियो के साथ बोलने का प्रयास करें। इसे कई बार करें ताकि आप सही उच्चारण और लहजे को पकड़ सकें। जब आप shadow speak करते हैं, तो ध्यान रखें कि आप वीडियो की गति को अपने बोलने में घोलें। इससे आप अपनी बोलने की क्षमता को मजबूत कर सकेंगे और अन्य अंग्रेजी बोलने वालों के साथ अनुभव साझा कर सकेंगे। इसलिए, नियमित रूप से अभ्यास करें और अपनी प्रगति को ट्रैक करें।

इस वीडियो का व्याकरण

वक्ता जिन संरचनाओं का सबसे अधिक प्रयोग करता है, वीडियो के असली शब्दों के साथ:

संरचना	वीडियो में
Passive voice be + past participle — ज़ोर इस पर कि क्या होता है, न कि कौन करता है	are actually replaced · are allowed · be sent
Relative clauses who / which + उपवाक्य — व्यक्ति या वस्तु के बारे में अतिरिक्त जानकारी	codes which have · anyone who sees · anyone who intercepts

शैडोइंग तकनीक क्या है?

शैडोइंग (Shadowing) एक विज्ञान-समर्थित भाषा सीखने की तकनीक है जो मूल रूप से पेशेवर दुभाषिया प्रशिक्षण के लिए विकसित की गई थी। विधि सरल लेकिन शक्तिशाली है: आप मूल अंग्रेज़ी ऑडियो सुनते हैं और तुरंत इसे ज़ोर से दोहराते हैं — जैसे वक्ता की छाया 1-2 सेकंड की देरी से। शोध से पता चलता है कि यह उच्चारण सटीकता, स्वर, लय, जुड़ी हुई ध्वनियाँ, सुनने की समझ और बोलने की प्रवाहशीलता में काफ़ी सुधार करता है।

शैडोइंग तकनीक: पूरी चरण-दर-चरण गाइड पढ़ें →

शैडोइंग अभ्यास: The Most Confused Concepts in Engineering - वीडियो के साथ अंग्रेजी बोलना सीखें

अभ्यास मोड चुनें

ऐप डाउनलोड करें

How Does a URL Shortener Work?

Cybersecurity Architecture: Data Security

What is Engineering?: Crash Course Engineering #1

System Design Mock Interview: Design Facebook Messenger

Every LINUX Concept Explained in 8 Minutes.

Proxy vs Reverse Proxy Server Explained

Password Storage Tier List: encryption, hashing, salting, bcrypt, and beyond

Why I use single-color gradients in my CSS

10 JavaScript Interview Questions You HAVE TO KNOW

A Return to Code