Question 1
What property of a cryptographic hash function makes it computationally infeasible to find the original input given only its hash output?
Correct Answer:
Preimage resistance
Question 2
Which hash function does Ethereum primarily use for hashing data such as addresses and storage keys?
Correct Answer:
Keccak-256
Question 3
What is the 'avalanche effect' in a cryptographic hash function?
Correct Answer:
A small change in input drastically changes the output
Question 4
In public-key cryptography used by blockchains, which key is used to create a digital signature for a transaction?
Correct Answer:
The sender's private key
Question 5
Which digital signature algorithm is used by both Bitcoin and Ethereum to authorize transactions?
Correct Answer:
ECDSA over the secp256k1 curve
Question 1
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About this Exam

Prepare with the Blockchain Security Certification Exam practice quiz. This question bank includes 60 questions covering blockchain, primary, transaction, block, and consensus. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Blockchain Security Certification Exam

This practice set contains 60 questions from the matching question bank and focuses on blockchain, primary, transaction, block, and consensus. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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