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Match the Following Object Properties/methods to Their Respective Descriptions

Question 69

Matching

Match the following object properties/methods to their respective descriptions.

Premises:

Responses:

Creates an object using the prototype, proto ; where properties is an optional list of properties added to the object

object.valueOf()

Returns the value of object as a text string, number, Boolean value, undefined, or null

Object.keys(obj)

Returns an array of the enumerable properties found in obj

object.hasOwnProperty(prop)

Returns true if obj is frozen

Object.isFrozen(obj)

References the prototype of the object, obj

object.isPrototypeOf(obj)

References the constructor function that creates object

Object.defineProperties(obj, props)

Returns true if the prop property is enumerable

object.propertyIsEnumerable(prop)

Returns true if object exists in object obj prototype chain

Object.create(proto, properties)

Defines or modifies the properties, prop , for the object, obj

Object.getPrototypeOf(obj)

Returns true if object has the specified property, prop

object.constructor

Premises:

Creates an object using the prototype, proto ; where properties is an optional list of properties added to the object

Returns the value of object as a text string, number, Boolean value, undefined, or null

Returns an array of the enumerable properties found in obj

Returns true if obj is frozen

References the prototype of the object, obj

References the constructor function that creates object

Returns true if the prop property is enumerable

Returns true if object exists in object obj prototype chain

Defines or modifies the properties, prop , for the object, obj

Returns true if object has the specified property, prop

Responses:

object.valueOf()

Object.keys(obj)

object.hasOwnProperty(prop)

Object.isFrozen(obj)

object.isPrototypeOf(obj)

Object.defineProperties(obj, props)

object.propertyIsEnumerable(prop)

Object.create(proto, properties)

Object.getPrototypeOf(obj)

object.constructor

Correct Answer:

Premises:

Responses:

Creates an object using the prototype, proto ; where properties is an optional list of properties added to the object

Returns the value of object as a text string, number, Boolean value, undefined, or null

Returns an array of the enumerable properties found in obj

Returns true if obj is frozen

References the prototype of the object, obj

References the constructor function that creates object

Returns true if the prop property is enumerable

Returns true if object exists in object obj prototype chain

Defines or modifies the properties, prop , for the object, obj

Returns true if object has the specified property, prop

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