An educational crypto, finance, and AI vocabulary puzzle about blockchain records, business accounting, prediction tasks, and database identifiers.
Block Explorer Fields
These fields identify a transaction, its position in the chain, and the addresses involved.
Transaction HashBlock HeightSender AddressRecipient Address
- Transaction Hash: A transaction hash is a cryptographic digest used to identify a blockchain transaction.
- Block Height: Block height counts the blocks preceding a particular block in a blockchain.
- Sender Address: A sender address identifies the account initiating a transaction on an account-based blockchain.
- Recipient Address: A recipient address identifies the destination account or contract for a transaction.
Income Statement Lines
These terms connect sales revenue with production costs, gross profit, and operating expenses.
RevenueCost of Goods SoldGross ProfitOperating Expense
- Revenue: Revenue is income earned from ordinary business activities, such as selling goods or providing services.
- Cost of Goods Sold: Cost of goods sold records costs attributable to the goods a business sold during a period.
- Gross Profit: Gross profit is revenue minus cost of goods sold, before operating expenses and other deductions.
- Operating Expense: An operating expense is a cost of running ordinary business operations, such as administrative salaries or office rent.
Supervised Learning Tasks
These tasks learn mappings from inputs to class labels or numerical targets.
Binary ClassificationMulticlass ClassificationMultilabel ClassificationRegression
- Binary Classification: Binary classification assigns an input to one of two possible classes.
- Multiclass Classification: Multiclass classification assigns an input to one class from three or more possible classes.
- Multilabel Classification: Multilabel classification allows an input to receive multiple labels at the same time.
- Regression: Regression learns to predict a numerical target from input features.
Relational Data Keys
These keys identify records and connect related tables while supporting data integrity.
Primary KeyForeign KeyComposite KeyCandidate Key
- Primary Key: A primary key uniquely identifies each row in a relational table and cannot contain null values.
- Foreign Key: A foreign key constrains values to reference a key in a related table, or in the same table.
- Composite Key: A composite key uses a combination of two or more columns to identify a row.
- Candidate Key: A candidate key is a minimal set of columns that can uniquely identify every row in a table.