1.
You need to verify your identity to conduct transactions in a decentralized exchange.
A. True
B. False
2.
Select the correct statements regarding Ethereum Proof-of-work (PoW).
A. It ensures that the blockchain will remain canonical into the future, making it incredibly difficult for an attacker to overwrite.
B. Ethereum’s proof-of-work algorithm is called 'Ethash'.
C. The concept of block difficulty is provided by the PoW algorithm, which is intended to maintain blockchain security.
D. All of the above
3.
_____ is used to sign a transaction and _____ is used to verify a transaction.
A. Private key; private key
B. Public key; public key
C. Public key; private key
D. Private key; public key
4.
2. Select the correct pair. a. WEB1.0 b. WEB2.0 c. WEB3.0 i. Metaverse ii. twitter iii. Static page iv. Blogging v. Blockchain vi. HTML
A. a - iii, vi | b - i, v | c - ii, iv
B. a - ii, iv | b - iii, vi | c - i, v
C. a - iii, vi | b - ii, iv | c - i, v
D. a - iii, iv, vi | b - ii | c - i, v
5.
The advantages of conducting transactions via a blockchain network include
A. Immutability
B. Low transaction cost
C. Censorship
D. No failure of a transaction
6.
You own your secret key when you are using a custodial wallet (e.g Binance).
A. True
B. False
7.
Select the correct statements regarding the Ethereum Virtual Machine (EVM).
A. It defines rules of changing state from block to block.
B. It is a programmable machine that can carry out instructions to generate arbitrary results.
C. It ensures that nothing else taking place in the system will be impeded by its computations.
D. All of the above.
8.
Storing your money in a centralized exchange is safe from risk since it's like a bank in the crypto world.
A. True
B. False
9.
What is not recorded in a Bitcoin block:
A. Address
B. Private key
C. Miner's reward
D. Information about the last block
10.
In a ______ blockchain, the transaction fee is calculated based on computational complexity. In a ______ blockchain, you decide the amount to pay as a transaction fee.
A. Bitcoin; Ethereum
B. Ethereum; Bitcoin
C. Bitcoin; Bitcoin
D. Ethereum; Ethereum
11.
When compared to Bitcoin, which of the following statements is incorrect regarding Ethereum?
A. Faster transaction speed
B. Lower cost of mining
C. Ethereum chain can perform computations
D. Higher scarcity
12.
Once a transaction is broadcasted on a blockchain, no one can tamper it.
A. True
B. False
13.
Cryptocurrencies have to be purchased in whole numbers and not in fractions (such as 0.00001 BTC).
A. True
B. False
14.
What is the role of gas fees?
A. Compensate and incentivize the miners
B. Prevents resources from being wasted on operations that are not valuable.
C. Keep the Ethereum network secure.
D. All of the above.
15.
Select the correct statements regarding 'Social recovery' wallets.
A. There is a single signing key that can be used to approve transactions.
B. There is a set of guardians, the majority of whom can cooperate to change the signing key of the account.
C. Under all normal circumstances, social recovery wallets are just like regular wallets.
D. All of the above
16.
You can build your decentralized application (dAPP) on the Bitcoin blockchain.
A. True
B. False
17.
If you want to manage the cryptocurrency holding with a friend together, each transaction needs the consent of both of you. You can use a ______ :
A. Cold wallet
B. Browser extension wallet
C. Mobile wallet
D. Multisig wallet
18.
What is the method used to make sure the transactions in a block will not have tampered?
A. Directed graph
B. Support vector machine
C. Linked stack
D. Merkle tree
19.
Why is digital signature important?
A. Data integrity. It makes sure the message won't be tampered with.
B. Authentication. Everyone can verify the sender of the transaction.
C. Non-repudiation. No one can deny a transaction that s/he signed.
D. All of above.
20.
The method that is used to ensure that everyone can verify your transaction while only you can sign your transaction is
A. Gamma function
B. Enigma
C. Hash function
D. MapReduce
21.
Gas limit is the _____ of the gas in a transaction.
A. Executed amount
B. Minimum amount
C. Maximum amount
D. Base amount
22.
You can secure your wallet by
A. Storing your private key in a secure and offline location.
B. Setting a strong wallet password (if there is any).
C. Moving long-term assets out of your daily-used wallet.
D. All of the above.
23.
Broadly, there are two types of nodes: full and light that are important to store information. Select the correct statements regarding the light nodes.
A. They do not download and store the full chain or execute all of the transactions.
B. They have access to block headers and can easily generate and receive info about transactions.
C. They use significantly less storage and syncing is quick.
D. All of the above
24.
Without having to download everything, Data Availability Sampling (DAS) enables nodes (even light clients) to quickly and securely confirm that everything was made available.
A. True
B. False
25.
Which of the following is an example of vertical scaling of a blockchain?
A. Scaling via sharding
B. Scaling via modularity
C. Scaling via increasing hardware capacity.
D. Scaling via multi-chain ecosystem
26.
With Eth2.0, the consensus mechanism of Ethereum has been changed to
A. Proof of Work
B. Proof of Identity
C. Proof of Stake
D. Practical Byzantine Fault Tolerance
27.
Which of the following is not a proper method for verifying a source?
A. The url/link of their website
B. Their email address/domain
C. Their social media name (such as Twitter)
D. The number of followers they have on social media
28.
You can create content on a WEB1.0 platform.
A. True
B. False
29.
Connecting to a DApp allows it to view your wallet balance.
A. True
B. False
30.
It's safe to sign approval for access to all your tokens to claim an NFT airdrop.
A. True
B. False
31.
The smallest unit of ETH is
A. wei
B. satoshi
C. DAI
D. Babbage
32.
Which of the following falls into the category of cold wallet?
A. Web extension
B. Mobile wallet
C. Paper wallet
D. All of the above
33.
Bitcoin is pre-mined by developers.
A. True
B. False
34.
The fraudulent investment scam that works by paying off older investors with money collected from new investors is ________.
A. Phishing
B. Ponzi scheme
C. Airdrop
D. Eclipse attack
35.
Select the incorrect statement regarding the types of accounts present on Ethereum.
A. An externally owned account can send messages to other contract accounts.
B. Both externally owned accounts and contract accounts can’t initiate new transactions on their own.
C. A message between two externally owned accounts is simply a value transfer.
D. A contract account's code is activated by a message sent from an externally owned account.
36.
The security threat consensus mechanisms tried to solve that one person tries to take over the network by creating multiple accounts, nodes or computers is
A. Sybil attack
B. Vampire attack
C. Replay attack
D. DDoS attack
37.
What is not an important factor to consider while choosing a custodial wallet service?
A. Whether it is regulated.
B. What types of services do you get.
C. If your private key is stored safely.
D. Whether it had celebrity endorsement.
38.
You can share your public keys with others to make transactions.
A. True
B. False
39.
What is not an appropriate way to invest in crypto?
A. Buy Bitcoin and hold it for the long term.
B. But a crypto ETF.
C. Short a cryptocurrency with 20 times leverage.
D. Set an automatic investment plan.
40.
You can trade a futures contract in a spot market.
A. True
B. False
41.
Which of the following is not helpful for safely managing your private key?
A. Write it down in a notebook and keep it safe.
B. Provide your private key to a crypto project team for future airdrop chance.
C. Remember your seed phrases in case the private key is lost.
D. Store your private key separately on different and independent devices.
42.
A bitcoin node validates transactions before adding them to the memory pool, where they wait to be incorporated (mined) into a block.
A. True
B. False
43.
There could be more than one fork on a blockchain network.
A. True
B. False
44.
What is not a characteristic of decentralized exchange?
A. Higher liquidity
B. No authentication of identity
C. Privacy
D. No embezzlement
45.
Which of these is a method Ethereum adopted to control its supply?
A. Refund
B. Gas fee
C. Burning
D. Oracle
46.
Digital signatures are different if the message you signed changes.
A. True
B. False
47.
An advantage of a custodial wallet is
A. Customer support
B. Lower transaction cost
C. No centralized risk
D. Higher privacy
48.
If you want to send 1ETH to your friend, you need to do this on ________.
A. Goerli test network
B. Sepolia test network
C. Solana network
D. Ethereum Mainnet
49.
A usual wallet cannot be used to manage NFTs which require special wallets for them.
A. True
B. False
50.
If you want to have full control over your holdings, a custodial wallet is the best option.
A. True
B. False