IT2864 Week 5

Which of the following is NOT a primitive data type in Solidity?

• uint256

• string

• address

• enum

What is the primary difference between constants and immutables in Solidity?

• Constants can be modified after contract deployment

• Immutables can be modified after contract deployment

• Constants are assigned values during contract deployment

• Immutables are assigned values during contract deployment

Which keyword is used to read the value of a state variable in Solidity?

• read

• this

• view

• get

What is the purpose of gas in Ethereum and Solidity?

• Gas determines the price of Ether

• Gas is used to fuel transactions and contract execution

• Gas is a special data type in Solidity

• Gas controls the total supply of Ether

In Solidity, which keyword is used for conditional branching?

• check

• if

• else

• condition

What is a mapping in Solidity?

• A way to store multiple values in a single variable

• A data structure for iterating over collections of data

• A special kind of function

• A way to associate keys with values

Which of the following best describes an enum in Solidity?

• An enum is a data type used to represent decimal numbers

• An enum is a data type used to define a set of named constant values

• An enum is a special kind of function

• An enum is used to specify gas prices in a contract

Which data location is used for function arguments in Solidity?

• Storage

• Memory

• Calldata

What is the primary purpose of a function modifier in Solidity?

• To change the data location of variables

• To define a new data type

• To modify the behavior of a function

• To create a new contract

What is the main use of events in Solidity?

• To create new contracts

• To modify the state of a contract

• To trigger off-chain actions and log important contract events

• To optimize gas consumption