Smart contract concept in Blockchain / Solidity - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a smart contract named MyContract.

Blockchain / Solidity

contract [1] {
    // contract code here
}

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ASmartContract

Bmycontract

CContract

DMyContract

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase or different contract names.

The contract name should start with a capital letter and match the declaration. 'MyContract' is the correct name.

2fill in blank

medium

Complete the code to define a public state variable named count of type uint.

Blockchain / Solidity

uint public [1];

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Acount

Bcounter

Cnumber

Dvalue

Attempts:

3 left

💡 Hint

Common Mistakes

Using other variable names like 'counter' or 'number'.

The variable name should be 'count' as specified.

3fill in blank

hard

Fix the error in the function declaration to make it a public function named increment.

Blockchain / Solidity

function [1]() public {
    count += 1;
}

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Aincrement

Badd

Cincrease

DIncrement

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase 'Increment' or other names.

Function names are case-sensitive. 'increment' in lowercase is correct.

4fill in blank

hard

Fill both blanks to complete the function that returns the current count.

Blockchain / Solidity

function [1]() public view returns ([2]) {
    return count;
}

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AgetCount

Buint

Cint

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong function names or return types like 'int'.

The function name should be 'getCount' and it returns a 'uint' type.

5fill in blank

hard

Fill both blanks to complete the constructor that sets count to zero.

Blockchain / Solidity

constructor() {
    count [1] [2];
}

Drag options to blanks, or click blank then click option'

Apublic

B=

C0

Dprivate

Attempts:

3 left

💡 Hint

Common Mistakes

Adding visibility like 'public' or 'private', or wrong assignment.

In modern Solidity, constructors do not use visibility modifiers. Set count to zero using '=' and '0'.