Question

The two-level predictor-corrector method is __________

(a) second-order accurate

(b) first-order accurate

(c) fourth-order accurate

(d) third-order accurate

I had been asked this question during an interview for a job.

The query is from Transient Flows in section Transient Flows of Computational Fluid Dynamics

Answer 1

Correct answer is (a) second-order accurate

The explanation is: The order of accuracy of the two-level predictor-corrector method is the same as the trapezoidal rule. This is because they employ the trapezoidal rule. The trapezoidal rule is second-order accurate.