The elements in the uninitialised array / vector?

julia> a=Vector{Float64}(undef,3)
3-element Array{Float64,1}:
 2.219358699e-314
 2.21936164e-314
 2.2085939415e-314

julia> println(bitstring(a[1]))
0000000000000000000000000000000100001011101111101111100000010000

I changed to my MAC book pro and the above is the code. Does this seem reasonable?