Whom vs whose

"Whom" is an Object Pronoun
"Whom" is an object pronoun like "him," "her" and "us." We use "whom" to ask which person receives an action.
Examples:
• Whom are you going to invite?
• Whom did he blame for the accident?
• Whom did he hire to do the job?
"Whose" is a Possessive Pronoun
"Whose" is a possessive pronoun like "his," "her" and "our." We use "whose" to find out which person something belongs to.
Examples:
• Whose camera is this?
• Whose dog is barking outside?
• Whose cell phone keeps ringing?