MongoDB — Updates

1 Find employees in Engineering Easy 2 Find with projection Easy 3 MongoDB updates #1 Medium 4 MongoDB updates #2 Medium 5 MongoDB updates #3 Medium 6 MongoDB updates #4 Medium 7 MongoDB updates #5 Medium 8 MongoDB updates #6 Medium 9 MongoDB updates #7 Medium 10 MongoDB updates #8 Medium 11 MongoDB updates #9 Medium 12 MongoDB updates #10 Medium 13 MongoDB updates #11 Medium 14 MongoDB updates #12 Medium 15 MongoDB updates #13 Medium 16 MongoDB updates #14 Medium 17 MongoDB updates #15 Medium 18 MongoDB updates #16 Medium 19 MongoDB updates #17 Medium 20 MongoDB updates #18 Medium 21 MongoDB updates #19 Medium 22 MongoDB updates #20 Medium 23 MongoDB updates #21 Medium 24 MongoDB updates #22 Medium 25 MongoDB updates #23 Medium 26 MongoDB updates #24 Medium 27 MongoDB updates #25 Medium 28 MongoDB updates #26 Medium 29 MongoDB updates #27 Medium 30 MongoDB updates #28 Medium 31 MongoDB updates #29 Medium 32 MongoDB updates #30 Medium