Question

Which is the major error occurring due to the finite difference approximations?

(a) Discretization error

(b) Round-off error

(c) Iteration error

(d) Modelling errors

The question was asked in an internship interview.

My enquiry is from Errors in Finite Difference Approximations topic in division Finite Difference Methods of Computational Fluid Dynamics

Answer 1

Right answer is (a) Discretization error

To explain I would say: The major error occurring in the finite difference method is the discretization error. This error occurs due to both temporal and spatial discretization using an approximation for the discretization. This is also called a numerical error.