Exam

Question 1

What is Truffle used for?

Setting up a private Tezos network.

Smart contracts compilation and deployment.

Writing smart contracts.

Testing smart contracts.

Tezos network monitoring.

Question 2

When retrieving a contract storage, Taquito stores every type except:

Lists

Bytes

Big maps

Mutez and tez

Records

Question 3

How can the user experience be improved?

By restricting the whole application to authenticated users

By using a Wallet.

By displaying basic information from the storage without restrictions

By preventing the users from sending transactions that will fail

By updating the storage information as soon as it changes

Question 4

When writing a migration, some javascript types are directly able to be used in an initial storage, others are not. What are the types not directly usable in Truffle?

Bytes

List

Big maps

Tez and mutez

Maps

Timestamp

Question 5

What is one problem solved by an API call to an explorer?

A more efficient storage fetching

Retrieving keys of a big map

Better support for protocol improvements

Sending transactions in batch

Question 6

Why is a Wallet required for Dapps?

For ease and safety as the users can use their own address

For network inspection

For sending transactions

For contract inspection.

For retrieving the storage information

Question 7

Why should the user be prevented from sending transactions in a row?

Because there can still be transactions in the mempool

The more transactions you send the higher the transaction fees will be

Sending too many transactions might slow the Dapp down

To prevent users from spending too many Tez in the app

Question 8

When should loadBalance and loadStorage be called?

When a new block is baked

On a regular basis (every minute for instance)

When a transaction sent by the user is confirmed

When the connected account changes