Add,Subtract,Multiply,Divide in Java Explained in Hindi. Java Development course part 6 in Hindi.

Hello Dosoto Aaj ke video me ham janege ki java me do data ko Add,Subbract,Multipy,Divide kaise karte hai.

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Topics covered in this video.

Add,Subtract,Multiply,Divide in Java.
How to learn java programming language.

learn java basics in Hindi.
java programming course for beginners in hidi.

#java #learnjavainhindi

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The Rise and Fall of Java

Few people know that Java, the worlds most popular programming language, the one that powers smartphone apps and Mars rovers alike, was the result of a project to build a better TV remote.
Channel: The Science Elf
Published: 2018-07-09 16:16:20
Duration: 10M38S
Views: 588369
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क्या चाँद अंदर से खोखला है ? | Hollow Moon Theory – Amazing Scientific Facts Related to the Moon

The Hollow Moon theory proposes that Earth’s Moon is either wholly hollow or otherwise contains a substantial interior space. No scientific evidence exists to support the idea, seismic observations and other data collected since spacecraft began to orbit or land on the Moon indicate that it has a thin crust, extensive mantle and small, dense core, although overall it is much less dense than Earth.

Between 1972 and 1977, seismometers installed on the Moon by the Apollo missions recorded moonquakes. The Moon was described as “ringing like a bell” during some of those quakes, specifically the shallow ones. This phrase was brought to popular attention in March 1970, in an article in Popular Science. When Apollo 12 deliberately crashed the Ascent Stage of its Lunar Module onto the Moon’s surface, it was claimed that the Moon rang like a bell for an hour, leading to arguments that it must be hollow like a bell. Lunar seismology experiments since then have shown that the lunar body has shallow moonquakes that act differently from quakes on Earth, due to differences in texture, type and density of the planetary strata, but there is no evidence of any large empty space inside the body.

The fact that the Moon is less dense than the Earth is advanced as support for it to be hollow. The moon’s mean density is 3.3 gm/cm3 whereas the Earth’s is 5.5. One explanation of this discrepancy is that the moon may have been formed by a giant impact which ejected some of the early Earth’s upper crust into its orbit. The Earth’s upper mantle and crust are less dense than its core.

Cornell University’s Ask an Astronomer, run by volunteers in the Astronomy Department, answered the question “Can we prove that the Moon isn’t hollow?”. There, physicist Suniti Karunatillake suggests that there are at least two ways to determine the distribution of mass within a body. One involves moment of inertia parameters, the other involves seismic observations. In the case of the former, Karunatillake points out that the moment of inertia parameters indicate that the core of the moon is both dense and small, with the rest of the moon consisting of material with nearly-constant density. As for the latter, he notes that the moon is the only planetary body besides Earth on which extensive seismic observations have been made. These observations have constrained the thickness of the moon’s crust, mantle and core, suggesting it could not be hollow.
Science has not got any evidence for it but scientific research is still happening. Technological advancement may help us to solve these.

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Disclaimer- Some contents are used for educational purpose under fair use. Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use.

Channel: FactTechz
Published: 2017-05-11 00:50:37
Duration: 9M6S
Views: 964034
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Every Computer User Must Know the Use of These Keys on Computer Keyboard

use of Esc Key , home key ,end key , insert key , num lock key , ins key , page up key , page down key , home key in hindi Every Computer User Must Know the Use of These Keys on Computer Keyboard, if you are computer student and user then you must know the actual use of these computer or a laptop keyboard keys.

is video me aapko computer ke kuch aise important keys jaise hi home key , pg dn , pg up ins,esc jaise keys in computer ya laptop me kya use hai ye aapko jarur pata hona chahiye agar aap apne daily life me computer istemal karte hai to.

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Channel: Technology Gyan
Published: 2018-06-04 12:15:22
Duration: 8M34S
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This is How Hackers Crack Passwords!

In this video, we’ll see how hackers really crack passwords.

This video is edited with Filmora video editor, get it here :

DISCLAIMER : This video is intended only to educate people about how hackers crack passwords, and how important the strength of the password is, when coming to security.

If you are using a common password like test123456 which I used in the video, then the hacker will easily be able to know the plain text form of your password from the hash string. There is something known as Rainbow tables. These rainbow tables contain the password hashes of numerous commonly used passwords.

So the hacker will be to do a simple search with the password hash that he has, and if the password hash exists in the rainbow table, then that means the password is successfully cracked, and we have the password in a plain text. Remember that rainbow tables contain the password hashes of only the passwords which are commonly used.
As a reference, you can go to

If the password is not a commonly used password, then there comes dictionary attack and brute force attack.

In dictionary attack, you have a wordlist. A wordlist is nothing but a huge text file with loads of passwords. In this attack, the hacker writes a code which compares the password hash to be cracked, with the password hash of each and every password that exists in the wordlist. Now, this attack can be target-specific as well. which means we can build a wordlist targeting an individual provided that we know some basic details about him/her.

In a brute force attack, each and every combination of letters ,symbols and numbers are converted into their hash forms, and are then compared with the hash to be cracked. This is a more expensive.

A new technique called salting is introduced by security analysts to give hackers a hard time in cracking passwords.

In this technique, a specific combination of characters are inserted at specific positions of the plain text password before hashing.
Every company has its own salting algorithm, and they don’t make their salting algorithm public

For example, kets say Facebook salting algorithm inserts the string f&2p at the beginning, after the third character, and at the end of the plain text password.
After salting the password, the salted password is then hashed by a hashing algorithm.

So when salting is used, rainbow tables are of no use even if the password to be cracked is a weak commonly used password. Because the hashe of the password without salting do not match the hash of the password which is salted

Also, brute force and dictionary attack are not effective to crack salted passwords unless the hacker already knows the salting algorithm employed by a company.

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Channel: Tech Raj
Published: 2018-05-09 05:50:38
Duration: 5M44S
Views: 4609062
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Mi Lifestyle Business plan || India’s no.1 Direct selling Company|

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Channel: Sonu Singh Saini
Published: 2018-09-10 16:29:23
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