I'm assuming you're in the US. Not unless you give him permission, he has a warrent, or it is an emergency.
To enter the police force as a constable, you need your 'baccalauréat' (the standard exam to get into university) and you have to sit a specific exam after that. There is about one applicant selected out of 20 or so, and most people are undergraduates.
the police have power to enter your house if they have a warrant.warrants are given by special people in high places and if they gain this warrant they have reason to believe you have something illegal in your house,e.g drugs,guns,evidence for a crime,etc.
For the police to enter your home without you permission they need a warrant to do so from a judge/court. Or, they need probably cause to believe an emergency or crime is in progress, at least in the U.S.
They could only prevent you if the Italian police caught you violating a law in Rome as you tried to enter the Vatican. You are not required to have a visa or even show your passport to enter the Vatican.
no no
Yes, once police are engaged in what is called "Hot pursuit" they then have the right to proceed with and enter the residence by virtue of "probable cause."
If you are talking about cyber police then its same as to find who is dirtying the pond you have to enter in the pond . and about normal crimes i don't think there is any special benefit but one can advertise about ; the crime is solved , or any public issue can be posted on police wall something like that.
No
Mabel Constable entered the Guinness Book of Records in 1968 for having the most children with a total of 316 offspring.
Yes.
nothing
According to our laws in Tanzania a police under Criminal Procedure Act can enter someone's property for emergency search