[Answers] QuarkChain Quiz 1 - Take sometime to test yourself about the QuarkChain Project, All questions are based on QuarkChain Whitepaper @quarkchain

3년 전

QuarkChain Quiz 1 - Take sometime to test yourself about the QuarkChain Project, All questions are based on QuarkChain Whitepaper

Note - Answers are marked with #, Also read options before marking as they are changing the order

Quark Question with Answer:

What is the official website of QuarkChain?*

https://quarkchain.io/

During public sale stage, 1ETH = ? QKC.*

31533 QKC / ETH

When is the planned date to launch mainnet 1.0?*

2018 Q4

What does TPS mean in QuarkChain’s whitepaper?*

Transactions per second

What is the main goal of QuarkChain?*

Provide scalability and high throughput blockchain

Which are the main features of horizontal scalability in centralized world?*

All of the above

What is the technology that QuarkChain uses to increase the throughput?*

Sharding

QuarkChain’s scalability technology is mainly based on*

Horizontal scalability

What is the consensus mechanism of QuarkChain?*

POW

Which one is correct?*

A. QuarkChain offers market driven collaborative mining.
B. QuarkChain supports cross-shard transactions.
C. QuarkChain has two layers, one is called rootchain.
#D. All above.

Will QuarkChain support smart contact?*

#A. It will support Turing complete smart contact written in Solidity.
B. It will support Turing complete smart contact, but developers need to learn a new language.
C. Yes, but not Turing complete.
D. No.

If a user has his/her balance in shard A while the user wants to use a smart contract in shard B, what should the user do?*

A. Go to exchange to buy some QKCs in shard B and perform the smart contract transaction.
B. Ask a friend who has balance in shard B to do so.
C. Send QKC to his/her shard B’s address and then use the smart contract.
#D Have shard A directly access the smart contract.

If a malicious miner wants to perform an attack on QuarkChain (with 10 shards), it needs collect at least hashpower of the whole network.*

A. 10%
#B. 25%
C. 5%
D. 50%

If a malicious miner wants to perform an attack on QuarkChain (with 100 shards), it needs collect at least hashpower of the whole network.*

A. 10%
#B. 25%
C. 0.5%
D. 50%

Why users can make a cross-shard transaction on QuarkChain?*

#A. Rootchain can confirm it.
B. The third shard services as the mid-man between two shards.
C. Each shard records the transactions of the whole network.
D. No. QuarkChain cannot do cross-shard transactions.

Based on QuarkChain's whitepaper, which one is correct?*

A. Only powerful parties can run a super-full node.
B. Users need multiple accounts (with different private keys) in different shards.
C. It is reshardable after main-net launched.
#D. Rootchain records transactions details.

QuarkChain Testnet 0.1 has been already running at:*

A. 21000 tps
B. 100 tps
#C. 2200 tps
D. 7500 tps

According to Qi Zhou (our CEO)'s testnet demonstration (you can find this video on youtube), how many shards we have in that testnet?*

A. 16
B. 7
C. 100
#D. 8

According to Qi Zhou (our CEO)'s testnet demonstration (you can find this video on youtube), which statement related to "secondary" in a user's balance is correct?*

A. It always shows zero.
B. There is no such thing in the users’ interface.
C. It is “pending balance” waiting for further confirmation.
#D. It is the sum of all balances other than the primary account

According to Qi Zhou (our CEO)'s test-net demonstration (you can find this video on youtube), if one clicks the "Transfer Balance" button, what will happen?*

A Nothing happens.
#B Secondary balance will transfer to primary one.
C Pop up a window for you to enter the target account address.
D Distribute the primary balance evenly to other shards.

Suppose current QuarkChain network supports A cross-shard transactions per second, how many cross-shard transactions per second can be supported after doubling the number of shards?*

A. AA
B. A
C. 4
A
#D. 2*A

What is the theoretical limit of the number of shards in QuarkChain?*

A. 1024
B. 100
C. 4294967296
#D. 2147483648

What is a QuarkChain’s cluster?*

A. Consist of multiple low-cost nodes
B. Solution to expensive super-full node
C. Reject any blocks from peers with invalid transactions
#D. All of above

When a user runs a QuarkChain node with cluster feature enabled and the node is running out of storage, what should the user do?*

A. Shut down the node and setup a new node with bigger storage
B. Re-install QuarkChain software
C. Adding a new node to the cluster and let cluster to migrate data to new node
#D. Both A and C

Which one is correct?*

A. Root chain is unminable.
B. Blocks in root chain include detailed transaction records.
C. One shard only contains 500 miners.
#D. Root-chain first proof of work is the consensus mechanism for the shards.

(Optional) What kind of D-Apps (or blockchain applications) do you think need 10000+ TPS?

Cryptokitties, gaming, IOT, Social network, cloud storage

Please upvote and follow if it helped. Will bring these kind of stuffs in future.

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Anyone know what the theoretical shard limit is ?

Based on QuarkChain's whitepaper, which one is correct?*
A. Only powerful parties can run a super-full node.
B. Users need multiple accounts (with different private keys) in different shards.
C. It is reshardable after main-net launched.
#D. Rootchain records transactions details.
D is not correct right? I have C.
The QuarkChain blockchain consists of a root blockchain and a set of shards, the root blockchain validates the blocks created by shards, while the shards record transactions into blocks.

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Agree.. i thinks the only right answer here is C.

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Testnet is already using shards...

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i thinks its "A".

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A is not right, quarkchain uses smaller honest nodes combined as a superfull node

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Hi there I see you are into Quizzing so am I can I join you as a friend? holofern from Stockholm

I presume for Qst
If a malicious miner wants to perform an attack on QuarkChain, it needs to collect at least hashpower of the whole network.*
the correct answer is:
(with 10 shards) - 5%
(with 100 shards) - 0.5%
http://joxi.ru/4Ak87K7fy6wp9r

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This was for a specific scenario when hash power of root chain is 0%

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can u break down in parts the answer to Q(What is the theoretical limit of the number of shards in QuarkChain?* )

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Not correct, the root chain, which gets 50% of the hash power needs to be attacked. So for a 50% attack on the root chain you always need 25% hash power no matter how many shards are active.

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I agree with you.

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Exactly, question is not related just to some n-shards. It is related to Quarckchain which is 50/50 in two chains.

Whats the answer to question 23? 2A, AA, A or 4*A

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its moves linear! so 2 times as fast

Bro. You are a genius. Thanks a ton man.

Thanks for your work buddy, Really.

Thank you very much!

4A? 2*A?

where can you find the theoretical limit of shards?

can u break down in parts the answer to Q(What is the theoretical limit of the number of shards in QuarkChain?*)

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It's mentioned by the CEO in a video from Blockchain Brad that it's 2.147 Billion Shards.

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Thanks. Will check the video but this is strange. The limit for transaction mentioned is 1.7mn in WP but you say shards limit is 2.1bn. What will rest of shards do.
Secondly, WP says the block limit on for chain is 8MB and the header size for one shard's block will be 128mb. That comes at about 3k what's accommodated in one block. How will they manage 2.1bn shards?

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oh...ok.thanks mate

Hey guys, With #26 When a user runs a QuarkChain node with cluster feature enabled and the node is running out of storage, what should the user do?*
Why you think we need to shutdown the node ?

allright