. Web3 Technology Solved MCQs 1–10: Web3 Basics What is Web3? A) A new version of HTML B) The third version of browsers ...
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Web3 Technology Solved MCQs
1–10: Web3 Basics
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What is Web3?
A) A new version of HTML
B) The third version of browsers
C) A decentralized internet built on blockchain
D) A type of search engine
✔️ Answer: C
Explanation: Web3 is the decentralized version of the internet, focused on blockchain, peer-to-peer, and user ownership. -
Which technology powers Web3?
A) Java
B) Blockchain
C) PHP
D) Wi-Fi
✔️ Answer: B -
What was Web1 primarily known for?
A) Social networks
B) Static websites
C) Smart contracts
D) Mobile apps
✔️ Answer: B
Explanation: Web1 (early internet) involved read-only, static pages. -
What feature distinguishes Web2 from Web1?
A) Decentralization
B) Interactivity and user-generated content
C) Smart contracts
D) Tokenization
✔️ Answer: B -
Web3 aims to give more control to:
A) Governments
B) Centralized corporations
C) Users
D) Hackers
✔️ Answer: C -
DAOs in Web3 stand for:
A) Decentralized Anonymous Organizations
B) Digital Asset Operators
C) Decentralized Autonomous Organizations
D) Digital Admin Owners
✔️ Answer: C -
What is a dApp?
A) Desktop App
B) Direct App
C) Decentralized Application
D) Dynamic App
✔️ Answer: C -
Which blockchain platform is most used for dApps?
A) Ripple
B) Ethereum
C) Bitcoin
D) Dogecoin
✔️ Answer: B -
Which term refers to the use of tokens in Web3?
A) Monetization
B) Tokenomics
C) Tokenization
D) Crypto pooling
✔️ Answer: B -
What is a major goal of Web3?
A) Reduce privacy
B) Promote centralization
C) Empower users with ownership
D) Decrease transparency
✔️ Answer: C
11–20: Web3 & Blockchain Concepts
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NFTs are a part of Web3 and represent:
A) Fungible tokens
B) Digital files only
C) Unique digital ownership
D) Standard web files
✔️ Answer: C -
What does “smart contract” mean in Web3?
A) AI-controlled agreement
B) Legal contract
C) Code that automatically executes terms
D) Paper-based agreement
✔️ Answer: C -
Which protocol is commonly used in Web3 wallets like MetaMask?
A) FTP
B) TCP/IP
C) Ethereum (ERC-20)
D) SQL
✔️ Answer: C -
Which of these is a Web3 browser?
A) Chrome
B) Opera
C) Brave
D) Firefox
✔️ Answer: C -
The term "gas fee" in Web3 refers to:
A) Petrol cost
B) Ethereum network transaction fee
C) Storage cost
D) Download charges
✔️ Answer: B -
A Web3 wallet helps to:
A) Track cookies
B) Run Windows apps
C) Store and manage crypto assets
D) Compress files
✔️ Answer: C -
Which layer is the foundation of Web3 infrastructure?
A) Application Layer
B) Middleware
C) Blockchain Layer
D) Frontend Layer
✔️ Answer: C -
In Web3, data is typically stored:
A) On a single server
B) Centrally
C) Across a distributed network
D) On CDs
✔️ Answer: C -
The process of verifying transactions in Web3 is called:
A) Confirming
B) Mining or Staking
C) Coding
D) Backing up
✔️ Answer: B -
Which consensus mechanism is more eco-friendly in Web3?
A) PoW
B) PoA
C) PoS
D) DDoS
✔️ Answer: C
21–30: Tokens, Wallets & Security
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A token that represents ownership of an asset is called a:
A) Digital badge
B) NFT
C) API key
D) QR code
✔️ Answer: B -
Which Web3 wallet is browser-based and widely used?
A) Trust Wallet
B) MetaMask
C) Binance
D) Exodus
✔️ Answer: B -
Hot wallets are:
A) Stored offline
B) Stored on paper
C) Connected to the internet
D) Used for heating
✔️ Answer: C 24. What is a seed phrase?A) Password hint
B) Transaction ID
C) A backup of a crypto wallet
D) Website address
✔️ Answer: C
Explanation: A seed phrase (usually 12–24 words) is used to restore a Web3 wallet. If lost, access to crypto and NFTs may be permanently gone.
25. Which token standard is used for NFTs on Ethereum?
A) ERC-20
B) ERC-721
C) ERC-1155
D) ERC-404
✔️ Answer: B
Explanation: ERC-721 defines a non-fungible token (NFT) standard on Ethereum. Each token is unique and cannot be exchanged 1:1.
26. Web3 wallets allow users to:
A) View Facebook pages
B) Manage crypto and connect to dApps
C) Send emails
D) Control operating systems
✔️ Answer: B
Explanation: Web3 wallets like MetaMask help users store crypto, interact with dApps, sign smart contracts, and manage NFTs.
27. A hardware wallet is:
A) Software on a browser
B) External device to store private keys offline
C) Printer
D) Mobile app
✔️ Answer: B
Explanation: Hardware wallets like Ledger and Trezor securely store private keys offline, reducing risk of hacking.
28. Private keys in Web3 are:
A) Shared with others
B) Public information
C) Confidential and control wallet access
D) Codes for voting
✔️ Answer: C
Explanation: Private keys grant full control over wallet assets and should never be shared.
29. Which of the following is a multi-chain Web3 wallet?
A) Trust Wallet
B) Adobe
C) Google Drive
D) Safari
✔️ Answer: A
Explanation: Trust Wallet supports multiple blockchains (like Ethereum, BNB, Polygon) and lets users store a variety of crypto assets.
30. Which risk is most common in Web3?
A) Power failure
B) Phishing and smart contract bugs
C) Heavy hardware
D) Typing errors
✔️ Answer: B
Explanation: Web3 platforms face phishing, scams, and vulnerable smart contracts as primary threats.
31. DeFi stands for:
A) Default Finance
B) Decentralized Finance
C) Digital Federation
D) Device Funding
✔️ Answer: B
Explanation: DeFi refers to blockchain-based financial services (lending, trading, insurance) without intermediaries.
32. Which platform is known for DeFi apps?
A) Ethereum
B) Windows
C) Google Cloud
D) LinkedIn
✔️ Answer: A
Explanation: Most DeFi apps run on Ethereum due to its smart contract capabilities.
33. DAOs are governed by:
A) CEOs
B) Code and token holders
C) Central banks
D) Committees
✔️ Answer: B
Explanation: DAOs (Decentralized Autonomous Organizations) operate by rules encoded in smart contracts, with token-holder voting.
34. In Web3 governance, voting is often done using:
A) Fiat currency
B) Social media
C) Tokens
D) Surveys
✔️ Answer: C
35. Compound and Aave are examples of:
A) Operating systems
B) Lending protocols in DeFi
C) Social media
D) Music players
✔️ Answer: B
Explanation: Compound and Aave are popular DeFi platforms for decentralized lending and borrowing.
36. Staking in Web3 refers to:
A) Cooking meat
B) Locking crypto to support network security
C) Hacking attempts
D) Cloud storage
✔️ Answer: B
37. What’s a liquidity pool?
A) Water reservoir
B) A fund where users deposit crypto for trading
C) Interest calculator
D) Crypto mining rig
✔️ Answer: B
Explanation: Liquidity pools enable users to deposit assets into smart contracts for decentralized trading on DEXs like Uniswap.
38. Uniswap is a:
A) Web browser
B) Central bank
C) Decentralized Exchange (DEX)
D) Programming language
✔️ Answer: C
39. Governance tokens are used to:
A) Send emails
B) Participate in protocol decisions
C) Access games
D) Unlock websites
✔️ Answer: B
40. Yield farming means:
A) Agriculture
B) Renting land
C) Earning rewards for crypto deposits
D) Food storage
✔️ Answer: C
Explanation: Yield farming is a DeFi strategy where users earn interest or rewards by depositing crypto into protocols.
41. Which of the following is a real-world use of Web3?
A) Decentralized voting
B) Traffic lights
C) Television
D) Air conditioning
✔️ Answer: A
42. Web3 is expected to improve:
A) Government control
B) User data privacy and ownership
C) Advertisement only
D) Electricity bills
✔️ Answer: B
43. Which job role is rising due to Web3?
A) Plumber
B) Blockchain Developer
C) Electrician
D) Librarian
✔️ Answer: B
44. What is token gating?
A) Preventing users from using tokens
B) Using tokens to unlock digital access or content
C) Token mining
D) Spam prevention
✔️ Answer: B
45. Which platform is exploring Web3 music distribution?
A) Audius
B) Spotify
C) Netflix
D) YouTube
✔️ Answer: A
46. Which sector is likely to benefit most from Web3 identity systems?
A) Logistics
B) Education
C) Healthcare
D) Advertising
✔️ Answer: C
47. The "metaverse" in Web3 is:
A) Social media tool
B) 3D virtual world built on blockchain
C) Video format
D) CPU brand
✔️ Answer: B
48. Web3 identity is also known as:
A) Twitter ID
B) DID (Decentralized Identifier)
C) Email
D) Username
✔️ Answer: B
49. What are soulbound tokens (SBTs)?
A) Tradable tokens
B) Tokens tied to a wallet and non-transferable
C) Smart contracts
D) Expired NFTs
✔️ Answer: B
50. What is the biggest barrier to Web3 adoption today?
A) Cost of phones
B) Complexity and lack of awareness
C) TV ads
D) Climate
✔️ Answer: B
Explanation: Web3 is technically complex for average users, and lack of education is a major barrier.
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