CS Electrical And Electronics
@cselectricalandelectronics

Which of the following command creates an index, where mobile_no is a field in the collection, employees?

All Questions › Category: Data Science › Which of the following command creates an index, where mobile_no is a field in the collection, employees?
0 Vote Up Vote Down
Anonymous asked 3 years ago

Options:

  1. db.SetIndex({“mobile_no”:1})
  2. employees.SetIndex({“mobile_no”:1})
  3. db.employees.ensureIndex({“mobile_no”:1})
  4. db.employees.SetIndex({“mobile_no”:1})
1 Answers
0 Vote Up Vote Down
Anonymous answered 3 years ago

The correct answer is 

  1. db.employees.ensureIndex({“mobile_no”:1})