For the Message Word A₁ A₂ A₃ A₄, Append Four

question 37

Essay

For the message word a₁ a₂ a₃ a₄, append four check digits c₁ = a₁, c_{2 =} a₂, c₃ = a₃ and c₄ = a₄. Will the resulting code detect and correct all single-digit errors? Can double errors be detected and corrected?

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Definitions:

Net Transfers

The balance of financial transactions from grants, remittances, or aid between entities or countries, excluding commercial transactions.

Financial Accounts

Records that track the financial activities and conditions of an individual, business, or organization, including assets, liabilities, and equity.

Positive Item

An item or aspect that contributes positively to a situation, often enhancing quality or effectiveness.

Balance Of Payments

A comprehensive record of a country's financial transactions with the rest of the world, including trade, investment, and monetary movements.