BTA Certified Blockchain Solution Architect

Here you have the best Blockchain CBSA practice exam questions

  • You have 228 total questions to study from
  • Each page has 5 questions, making a total of 46 pages
  • You can navigate through the pages using the buttons at the bottom
  • This questions were last updated on October 9, 2025
  • This site is not affiliated with or endorsed by Blockchain.
Question 1 of 228
SHA-1 is the most commonly used SHA algorithm, and produces a ______-byte hash value(size).
    Correct Answer: D

    SHA-1 produces a 20-byte (160-bit) hash value. Each byte contains 8 bits, and since SHA-1 generates a 160-bit hash, this equates to 20 bytes. It is well-known in cryptographic practices and standard documentation.

Question 2 of 228
What type of attack would be considered a very large flaw in public blockchains such as Bitcoin's Blockchain where the majority of hashpower could possibly be controlled thru an attack?
What is the specific attack Bitcoin could be exposed to?
    Correct Answer: A

Question 3 of 228
How many satoshis are in 1 bitcoin and how many wei in an Ether? (Select two.)
    Correct Answer: A, C

    There are 100,000,000 satoshis in 1 bitcoin, which corresponds to 1.0 × 10^8 satoshis. Therefore, 1 BTC does not convert to option A. However, 1 ether is equivalent to 1,000,000,000,000,000,000 wei, which is 1.0 × 10^18 wei. Thus, option A accurately reflects the conversion for ether. Meanwhile, the correct conversion for satoshis (bitcoin) should be chose option C. Therefore, the correct answers are option A and C.

Question 4 of 228
In the Proof of Stake(POS) algorithm the miners are really known as ___________?
    Correct Answer: C

    In the Proof of Stake (POS) algorithm, the individuals responsible for validating transactions and creating new blocks are typically known as 'forgers.' This term is used because, unlike Proof of Work systems where miners solve complex mathematical problems to create new blocks, in POS systems, the selection process is based on the amount of cryptocurrency held by the participant, known as their stake. The process is more about forging the new blocks based on the stakeholder's wealth rather than performing computationally intensive tasks.

Question 5 of 228
A ____________cipher basically means it is using a fixed key which replaces the message with a pseudorandom string of characters. It is basically the encryption of each letter one at a time.
What is the cipher type?
    Correct Answer: A