JS Object Recap

What is a JavaScript Object?

• a collection of key-value pairs

• a collection of arrays

• a collection of functions

• a collection of strings

How do you create an object using literal notation?

• let obj = [key: value];

• let obj = {key: value};

• let obj = (key: value);

• let obj = <key: value>;

What is the correct syntax for accessing the property of an object?

• objectName.objectPropery( );

• objectName.objectProperty[ ];

• objectName.objectProperty;

• objectName.objectProperty{ };

What will be the output of the following code: alert(person.firstname); when person is {firstName: 'John',lastName:'Doe'}?

• John

• Doe

• undefined

• null

What will be the output of the following code: alert(address.district); when address is {buildingNo: '3960' , street: 'North 1st Street', country: 'USA'};?

• 3960

• North 1st Street

• USA

• undefined