What is a Hadoop? Like the meaning and a example to help me understand better please.

Develop a function to create a document in the mongodb database “city” in the collection “inspections.” be sure it can handle error conditions gracefully. a. input -> argument to function will be set of key/value pairs in the data type acceptable to the mongodb driver insert api call b. return -> true if successful insert else false (require a screenshot)

How do i change the size of my bookmarks in my bookmarks bar in google chrome? ? plz hlp me

Difference between ancient and modern mode of information transmission