  The main purpose of this paper is to determine the radii of starlikeness and
convexity of the generalized $\emph{k}-$Bessel functions for three different
kinds of normalization by using their Hadamard factorization in such a way that
the resulting functions are analytic in the unit disk of the complex plane. The
characterization of entire functions from Laguerre-P\'olya class plays an
crucial role in this paper. Moreover, the interlacing properties of the zeros
of $\emph{k}-$Bessel function and its derivative is also useful in the proof of
the main results. By making use of the Euler-Rayleigh inequalities for the real
zeros of the generalized $\emph{k}-$Bessel function, we obtain some tight lower
and upper bounds for the radii of starlikeness and convexity of order zero.
