Global execution context in Javascript - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a global variable named message with the value 'Hello'.

Javascript

var [1] = 'Hello';

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

Amsg

Bmessage

Cgreeting

Dtext

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different variable name than 'message'.

Forgetting to declare the variable with var, let, or const.

The global variable is named message. Using var message = 'Hello'; declares it globally.

2fill in blank

medium

Complete the code to log the global variable message to the console.

Javascript

console.log([1]);

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

Amessage

B'message'

Cconsole

Dlog

Attempts:

3 left

💡 Hint

Common Mistakes

Putting quotes around the variable name, which prints the name as a string.

Using console or log alone inside console.log().

To print the value of the variable message, pass it directly to console.log without quotes.

3fill in blank

hard

Fix the error in the code to correctly declare a global constant named PI with value 3.14.

Javascript

const [1] = 3.14;

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

Api

BPi

CpI

DPI

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase or mixed case names like 'pi' or 'Pi' which are different variables.

Forgetting that JavaScript variable names are case-sensitive.

JavaScript is case-sensitive. The constant name should be PI exactly to match the intended global constant.

4fill in blank

hard

Fill both blanks to create a global object user with properties name and age.

Javascript

const user = { name: '[1]', age: [2] };

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

AAlice

B30

CBob

D25

Attempts:

3 left

💡 Hint

Common Mistakes

Using numbers as strings for age.

Mixing up the name and age values.

The object user has name set to 'Alice' and age set to 30.

5fill in blank

hard

Fill all three blanks to create a global function greet that returns a greeting with the given name.

Javascript

function [1]([2]) {
  return `Hello, [3]!`;
}

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

Agreet

Bname

C${name}

Duser

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect function or parameter names.

Not using template literals properly for string interpolation.

The function is named greet, takes a parameter name, and returns a greeting using template literals with ${name}.