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Blockchain Basics
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Blockchain Basics
Blockchain Basics
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1
Question
What is a blockchain ledger?
Answer
The actual record of all transactions, like a shared receipt book.
2
Question
Why is a shared ledger important for trust and security?
Answer
Everyone has the same version, so no one can secretly change anything.
3
Question
What is a smart contract?
Answer
Code that runs itself when conditions are met, without a middleman.
4
Question
Give a real-life example of a smart contract.
Answer
A vending machine: If you put in the money and press the button, it gives you the item.
5
Question
What is mining in blockchain?
Answer
Solving hard math puzzles to validate transactions and get rewarded, adding new blocks in systems like Bitcoin.
6
Question
Why do miners need to solve hard problems?
Answer
To make it expensive and difficult to cheat the system.
7
Question
What is a consensus mechanism?
Answer
How all nodes agree on the latest version of the blockchain.
8
Question
How do blockchain participants agree without a boss?
Answer
They follow set rules, and only data that meets the rules is added.
9
Question
What does 'immutable' mean in the context of blockchain?
Answer
Unchangeable. Once a transaction is recorded, it stays there forever.
10
Question
How does immutability build trust?
Answer
You know that no one can secretly change the records.
11
Question
How does cryptography support privacy and security in blockchain?
Answer
It ensures only authorized users can do things and protects data from hackers.
12
Question
What is cloud computing?
Answer
Accessing storage, processing power, and services over the internet instead of on local devices.
13
Question
How does cloud computing help companies like Fortnite?
Answer
It allows them to handle millions of users by scaling resources up or down based on demand.
14
Question
What is a data center?
Answer
A physical location filled with servers that store and deliver cloud services.
15
Question
Why are data centers located all over the world?
Answer
To improve speed, reliability, and access for users in different regions.
16
Question
What does scalability mean in cloud computing?
Answer
The ability to increase or decrease resources based on usage needs.
17
Question
What kind of companies benefit from scalability?
Answer
Apps and websites with fluctuating traffic, like Netflix or Amazon.
18
Question
What’s one downside of having lots of data centers?
Answer
They use a lot of energy, which can negatively impact the environment.
19
Question
Why might a company like Snapchat be concerned about cloud costs?
Answer
As they grow, the price of constantly renting cloud services can get very high.
20
Question
What is DNA data storage?
Answer
A futuristic method of storing data by encoding it into synthetic DNA.
21
Question
Why are scientists exploring DNA storage?
Answer
It can store massive amounts of data in a tiny space and last a long time.
22
Question
Classical computers use
Answer
bits (0 or 1).
23
Question
Quantum computers use
Answer
qubits, which can be 0, 1, or both at the same time.
24
Question
How do qubits improve the speed of quantum computers in solving complex problems?
Answer
Qubits allow quantum computers to perform many calculations at once, which makes them faster at solving complex problems.
25
Question
Quantum computing is used for super hard problems, like:
Answer
Drug design Weather forecasting Traffic systems Cybersecurity
26
Question
Which industries benefit the most from quantum computing, and why don't simpler applications need it?
Answer
Industries with lots of variables and data, such as science and finance, benefit most from quantum computing. Simpler applications, like social media, don't require the advanced capabilities of quantum computing.
27
Question
What is superposition in quantum computing, and how does it benefit quantum computers?
Answer
Superposition means a qubit can be in multiple states at once. This enables quantum computers to explore many possibilities simultaneously.
28
Question
How does superposition contribute to speeding up problem-solving in quantum computing?
Answer
Superposition speeds up problem-solving because the computer can try many possibilities at once, rather than being stuck on one option at a time.
29
Question
Why do quantum computers need to be kept near absolute zero?
Answer
Quantum computers need to be super cold (near absolute zero) to keep qubits stable and reduce errors. If it's not cold enough, qubits become unstable, leading to bad data or failure.
30
Question
How might quantum computing impact cryptography and cybersecurity?
Answer
Quantum computers could break current encryption, such as passwords and secure messages, potentially leading to major changes in cybersecurity. If quantum computers become powerful enough, current security measures could become ineffective overnight, necessitating the development of new encryption methods.