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Question 1
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
88% (02:20) correct
12%
(02:59) wrong
based on 65
sessions
History
Date
Time
Result
Not Attempted Yet
Question 2
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
81% (00:47) correct 19%
(00:54) wrong
based on 73
sessions
History
Date
Time
Result
Not Attempted Yet
Question 3
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
85% (00:50) correct 15%
(02:09) wrong
based on 74
sessions
History
Date
Time
Result
Not Attempted Yet
Question 4
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
70% (01:09) correct 30%
(00:56) wrong
based on 66
sessions
History
Date
Time
Result
Not Attempted Yet
Blockchain is an electronic technology similar to an accounting ledger, only it records transactions across a vast network and is decentralized, meaning it doesn’t require any single authority to oversee it. With a blockchain, any number of people can participate in the network, as it is public. So-called “miners” on the network work out complex mathematical problems to validate transactions. There needs to be consensus on the network about the validity of the transaction in order for it to go through. This system reduces the risk of malicious activity being carried out on the network. Advocates of the technology say that is a huge advantage when it comes to tracking financial transactions and other data.
But there’s a problem, Harvard Innovation Labs, the management and technology think tank, says. “Blockchain can be slow,” researchers at Harvard said in a report published in October 2018. “In contrast to some legacy transaction processing systems able to process tens of thousands of transactions per second, the bitcoin blockchain can handle only three to seven transactions per second; the corresponding figure for Ethereum blockchain is as low as 15 transactions per second.” The report adds: “Because of relatively poor performance, many observers do not consider blockchain technology to be viable for large-scale applications.” However, the report also says that work is being done to create a more efficient model that can speed up transaction speeds. Firms in the industry like Hyperledger, Stellar, and Ripple are using new consensus mechanisms aimed at accelerating this process. These new models are called proof-of-stake systems, in which a blockchain miner is required to have a certain stake in the digital asset in order to participate in the network. “The evolution of consensus mechanisms will improve blockchain speed significantly – good news for applications in trade finance, supply chain traceability, auto leasing, marine insurance, healthcare, and insurance,” the report said.
But there’s a problem, Harvard Innovation Labs, the management and technology think tank, says. “Blockchain can be slow,” researchers at Harvard said in a report published in October 2018. “In contrast to some legacy transaction processing systems able to process tens of thousands of transactions per second, the bitcoin blockchain can handle only three to seven transactions per second; the corresponding figure for Ethereum blockchain is as low as 15 transactions per second.” The report adds: “Because of relatively poor performance, many observers do not consider blockchain technology to be viable for large-scale applications.” However, the report also says that work is being done to create a more efficient model that can speed up transaction speeds. Firms in the industry like Hyperledger, Stellar, and Ripple are using new consensus mechanisms aimed at accelerating this process. These new models are called proof-of-stake systems, in which a blockchain miner is required to have a certain stake in the digital asset in order to participate in the network. “The evolution of consensus mechanisms will improve blockchain speed significantly – good news for applications in trade finance, supply chain traceability, auto leasing, marine insurance, healthcare, and insurance,” the report said.
1. Each of the following is mentioned in the passage as an element of the blockchain technology EXCEPT
A. miners
B. an interconnected, open system
C. approval of ledger entries
D. complex mathematical problems
E. devices with specialized hardware
A. miners
B. an interconnected, open system
C. approval of ledger entries
D. complex mathematical problems
E. devices with specialized hardware
2. The passage is primarily concerned with
A. assessing the validity of Harvard Innovation Labs' report on blockchain speed
B. evaluating the criterion used to assess the viability of the blockchain technology
C. discussing whether blockchain is good news for certain businesses
D. introducing blockchain technology and evaluating its utility in the face of current inadequate speed
E. establishing the relation between consensus mechanism and speed in a blockchain network
A. assessing the validity of Harvard Innovation Labs' report on blockchain speed
B. evaluating the criterion used to assess the viability of the blockchain technology
C. discussing whether blockchain is good news for certain businesses
D. introducing blockchain technology and evaluating its utility in the face of current inadequate speed
E. establishing the relation between consensus mechanism and speed in a blockchain network
3. The author of the passage suggests which of the following about bitcoin blockchain and Ethereum blockchain?
A. The two systems employ different consensus mechanisms.
B. Bitcoin blockchain processes fewer transactions per unit of time than Ethereum blockchain does.
C. Both the systems are incompatible with proof-of-stake systems.
D. Bitcoin blockchain involves more complex mathematical problem solving than Ethereum blockchain does.
E. Bitcoin blockchain features a faster consensus building mechanism than Ethereum blockchain does.
A. The two systems employ different consensus mechanisms.
B. Bitcoin blockchain processes fewer transactions per unit of time than Ethereum blockchain does.
C. Both the systems are incompatible with proof-of-stake systems.
D. Bitcoin blockchain involves more complex mathematical problem solving than Ethereum blockchain does.
E. Bitcoin blockchain features a faster consensus building mechanism than Ethereum blockchain does.
4. The author implies which of the following about firms such as Hyperledger, Stellar, and Ripple?
A. The work of these firms can positively affect a wide range of business applications.
B. These firms are more likely to be successful than other blockchain firms building new consensus mechanisms.
C. These firms build customized business applications for various industries.
D. The blockchain network built by these firms is likely to be more accurate in tracking financial transactions.
E. The blockchain network built by these firms can either improve speed or reduce malicious activity, but not both.
A. The work of these firms can positively affect a wide range of business applications.
B. These firms are more likely to be successful than other blockchain firms building new consensus mechanisms.
C. These firms build customized business applications for various industries.
D. The blockchain network built by these firms is likely to be more accurate in tracking financial transactions.
E. The blockchain network built by these firms can either improve speed or reduce malicious activity, but not both.
This is a RC Butler
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25 Feb 2026, 00:48
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passage 1 = introduction to blockchain. author asks for some consensus on the network about the validity
passage 2= harvard reports the problems with the speed of transaction. some firms are working on accelerating this process and how that evolution will improve speed significantly.
Que 1. a-A,B,C,D are mentioned in the passage. only E is not mentioned
Que 2.
A not focusing on assessing the validity HIL.
B not evaluating criteria's used to assess the usefulness of BT
C not at all.
D perfect. as we discussed earlier about each passsage. this clearly depicts the meaning of whole passage.
E this comparison was not the sole focus of passage.
Que 3.
the only thing about given two entities that have been mentioned is about their speed. BB has lower transaction per speed whereas EB has higher speed. and both has lower speed compared to traditional financial legacy transaction.
A no comparison about having different consensus mechanism.
B this is in line with the given info in passage.
C nothing has been mentioned about this one at all.
D we dont know anything about their problem solving mechanism.
E this is irrelevant
Que 4
passage says that these firms are working on improving the transaction speed and what miners would need to participate on the network. this change will have impact on large scale application.
A this clearly defines the purpose of those mentioned companies.
B wrong comparison.
C we dont know this. what we know is that it will impact on large scale applications.
D nothing has been said about their accuracy in tracking transaction.
E we havent given info on their ability to reduce malicious activity. so we cant compare that.
passage 2= harvard reports the problems with the speed of transaction. some firms are working on accelerating this process and how that evolution will improve speed significantly.
Que 1. a-A,B,C,D are mentioned in the passage. only E is not mentioned
Que 2.
A not focusing on assessing the validity HIL.
B not evaluating criteria's used to assess the usefulness of BT
C not at all.
D perfect. as we discussed earlier about each passsage. this clearly depicts the meaning of whole passage.
E this comparison was not the sole focus of passage.
Que 3.
the only thing about given two entities that have been mentioned is about their speed. BB has lower transaction per speed whereas EB has higher speed. and both has lower speed compared to traditional financial legacy transaction.
A no comparison about having different consensus mechanism.
B this is in line with the given info in passage.
C nothing has been mentioned about this one at all.
D we dont know anything about their problem solving mechanism.
E this is irrelevant
Que 4
passage says that these firms are working on improving the transaction speed and what miners would need to participate on the network. this change will have impact on large scale application.
A this clearly defines the purpose of those mentioned companies.
B wrong comparison.
C we dont know this. what we know is that it will impact on large scale applications.
D nothing has been said about their accuracy in tracking transaction.
E we havent given info on their ability to reduce malicious activity. so we cant compare that.
ExpertsGlobal5
25 Feb 2026, 05:40
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ExpertsGlobal5
1. Each of the following is mentioned in the passage as an element of the blockchain technology EXCEPT
A. miners
B. an interconnected, open system
C. approval of ledger entries
D. complex mathematical problems
E. devices with specialized hardware.
Just skimming through the first paragraph of the passage we can find the wordings, except option E.
2. The passage is primarily concerned with
A. assessing the validity of Harvard Innovation Labs' report on blockchain speed.
The data of Harvard’s Innovation lab is bring a perspective of a problem block chain has. This report brings credibility to the discussion rather than claims. This is not the main theme. Wrong.
B. evaluating the criterion used to assess the viability of the blockchain technology.
The passage doesn’t present criteria to access blockchain technology. Hence, Wrong.
C. discussing whether blockchain is good news for certain businesses.
The last few lines mentions, if the consensus mechanism is enhanced, does this benefit a certain business. Hence, Not the main crux, wrong.
D. introducing blockchain technology and evaluating its utility in the face of current inadequate speed.
This is the correct answer. As the first paragraph speaks about the general theme and the second para begins with a limitation of blockchain and the recent developments to cater this particular problem. Hence, correct.
E. establishing the relation between consensus mechanism and speed in a blockchain network.
The passage is not trying to establish a relationship. Even though the speed and consensus are related. But, that doesn’t mean it the main crux. Hence, Wrong.
Option D
3. The author of the passage suggests which of the following about bitcoin blockchain and Ethereum blockchain?
The verses of the second paragraph- “ “In contrast to some legacy transaction processing systems able to process tens of thousands of transactions per second, the bitcoin blockchain can handle only three to seven transactions per second; the corresponding figure for Ethereum blockchain is as low as 15 transactions per second“.
Only Option B resonates with this theme perfectly.
A. The two systems employ different consensus mechanisms.
B. Bitcoin blockchain processes fewer transactions per unit of time than Ethereum blockchain does.
C. Both the systems are incompatible with proof-of-stake systems.
D. Bitcoin blockchain involves more complex mathematical problem solving than Ethereum blockchain does.
E. Bitcoin blockchain features a faster consensus building mechanism than Ethereum blockchain does.
Option B
4. The author implies which of the following about firms such as Hyperledger, Stellar, and Ripple?
A. The work of these firms can positively affect a wide range of business applications.
The last few lines of paragraph 2 mentions, “ using new consensus mechanisms aimed at accelerating this process“. These firms use a new consensus mechanism which speeds up the process. The subsequent lines mention - “The evolution of consensus mechanisms will improve blockchain speed significantly – good news for applications in certain businesses “. Thus, new mechanism creates a positive impact.
Correct answer.
B. These firms are more likely to be successful than other blockchain firms building new consensus mechanisms.
Whether these firms will remain successful or not is a million dollar question which has to be answered as time progresses. Hence, Wrong.
C. These firms build customized business applications for various industries.
They built a mechanism to facilitate faster transactions. This is contradictory to the theme of the passag. Wrong.
D. The blockchain network built by these firms is likely to be more accurate in tracking financial transactions.
Accuracy is not the key , but speed. Hence, out of scope answer. Wrong.
E. The blockchain network built by these firms can either improve speed or reduce malicious activity, but not both.
This option paints a completely new picture which is 180 degree shift from the actual passage. Hence, Wrong.
Option A
