M08mcq Module Completion Quiz (Module 08 Structuring Data & Blockchain (Roadmap))

digital ledger

A bookkeeping list of assets (money, property, ideas...), identified ownership, and transactions that record the transfer of ownership among participants.

hash

A function that converts an input (a record, message or file) into a unique encrypted output of a fixed length.

proof-of-work

A requirement to define an expensive computer calculation that needs to be performed in order to create a new group of blocks on a distributed blockchain.

double-spend

By issuing concert tickets on the blockchain, fans can verify transfer of ownership from one digital wallet to another, rather than worrying whether the PDF (or paper) ticket they received was sold to 10 other people. This is an example of how blockchain solves the ____________ problem. a) benchmark b) double-cross c) inflation d) double-spend

immutability

The ability for a set of data to remain permanent, indelible, and unalterable.

An entity (also known as a table) stores information about people, places, or events, whereas an attribute is a column or specific field of the data elements associated with an entity.

What is the primary difference between an entity and an attribute? a) An attribute is a table that stores information about people, places or events, whereas an entity is redundant data. b) An entity is a specific integrity constraint, whereas an attribute is a best practice based on benchmarking. c) An entity (also known as a table) stores information about people, places, or events, whereas an attribute is a column or specific field of the data elements associated with an entity. d) An attribute refers to information redundancy, and an entity refers to data governance.

prevent the creation of an order for a nonexistent customer, prevent ordering zero pounds of raw materials from a supplier, prevent a negative markup percentage

Which of the following are examples of integrity constraints? (Select all that apply, omit those that do not.) a) prevent the creation of an order for a nonexistent customer b) prevent ordering zero pounds of raw materials from a supplier c) ensure formatting includes decimal positions d) ensure that only authorized users have access to data e) prevent a negative markup percentage

The hash of a financial transaction, The duration of a phone call, The date a photograph was taken.

Which of the following are examples of metadata? (Select all that apply, omit those that do not.) a) The year within a date of birth. b) The hash of a financial transaction c) The duration of a phone call. d) The color of the sky in a digital image of the sunset. e) The date a photograph was taken.