"What is the difference between Quality Control Engineer and Quality Assurance Engineer? Also i have an interview 2 days later , what advice I can get from you since I’m a fresh graduate in mechanical engineer applying for a Quality Control Engineer in a plastic industry organization ?”
Quality Control is about having a specification, having a control plan (what to control, by whom, and when, with what sample size), performing that control plan and ensuring that nonconformities are treated.
Quality Assurance is much richer, includes Control but also designing the Control Plan, working with preventive measures like working with suppliers, training workers, includes improving quality by changing procedures, specifications and other items.
Quality Control is focused in meeting quality requirements. Quality Assurance is focused in giving confidence that quality requirements will be met.
The following material will provide you information about the risk-based approach: