This set of MCQ(multiple choice questions) focuses on the Blockchain and its Applications NPTEL 2022 Week 9 Assignment Solutions.
Course layout
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Week 1: Introduction to Blockchain Technology and its Importance
Week 2: Basic Crypto Primitives I – Cryptographic Hash
Week 3: Basic Crypto Primitives II – Digital Signature
Week 4: Evolution of the Blockchain Technology
Week 5: Elements of a Blockchain
Week 6: Blockchain Consensus I – Permissionless Models
Week 7: Blockchain Consensus II – Permissioned Models
Week 8: Smart Contract Hands On I – Ethereum Smart Contracts (Permissionless Model)
Week 9: Smart Contract Hand On II – Hyperledger Fabric (Permissioned Model)
Week 10: Decentralized Identity Management
Week 11: Blockchain Interoperability
Week 12: Blockchain Applications
NOTE: You can check your answer immediately by clicking show answer button. This set of “Blockchain and its Applications NPTEL 2022 Week 9 Assignment Solution” contains 10 questions.
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Blockchain and its Applications NPTEL Week 9 Assignment Solutions
Q1. Which of following statements are the true for PBFT
a) It requires a dynamic consensus group
b) For scalability it requires O(n) for communication complexity
c) create multiple pseudonymous identities to subvert the 3f+1 requirements of PBFT
d) None of the above
Answer: c)
Q2. Which of the following sequence of steps is valid for Algorand?
i. A block is prepared
ii. Run Byzantine agreement on the block
iii. Prepare the digital signature and propagate
iv. Block is propagated through gossiping
a) i, iv, ii, iii
b) i, ii, iv, iii
c) i, ii, iii, iv
d) i, iii, ii, iv
Answer: a)
Q3. Strong Synchrony ensures liveness of protocol Algorand. True of False
a) True
b) False
Answer: a)
Q4. Algorand is not always safe under weak synchrony. True of False
a) True
b) False
Answer: b)
Q5. Which of the following is true about the selection of the random committee in the Algorand network?
a) There is a dedicated node which chooses the nodes to form the committee
b) A distributed algorithm decides the list of nodes participating in the committee
c) The nodes elect themselves as a committee member by winning a local computation
d) A specific pool of node choose are given the responsibility of forming the committee
Answer: c)
Q6. Which of the following is not a valid component in Distributed Identifiers(DID) Architecture.
a) DID Controller
b) DID Validator
c) Verifiable Data Registry
d) DID Subject
Answer: b)
Q7. Consider the following statement – “Say Alice has generated two Distributed Identifiers (DID) DID1 and DID2 for three of her pairwise relationships maintained in Hyperledger Indy”. Which part of the above statement is false with respect to the concepts of Hyperledger Indy?
a) Generation of DID by Alice
b) Two DID(s) for 3 pairwise relationships
c) The above statement is completely correct
d) Both parts of the statement are wrong
Answer: b)
Q8. In Verifiable Credential (VC), a claim is a statement about a ____________.
a) Holder
b) Issuer
c) Subject
d) Verifier
Answer: c)
Q9. Which of the following statements is/are true
I. In Hyperledger Indy, any party can read the ledger.
II. In Hyperledger Indy, only registered parties and can write to the ledger.
a) I
b) II
c) I, II
d) None of the above
Answer: c)
Q10. Which of the following sequence of steps is valid for DID Registration?
i. Register DID
ii. Create DID Document
iii. Fetch DID Document
iv. Update DID Document
a) ii, i, iv, iii
b) ii, iv, iii, i
c) ii, iv, i, iii
d) i, ii, iii, iv
Answer: a)
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