What are the two most common types of drug testing?

• A. Preemployment and random
• B. Post-accident and random
• C. Periodic and exit
• D. Mandatory and voluntary

Answer: (A)

In workplaces that use drug testing, the two most common approaches are pre-employment testing and random testing. Pre-employment testing screens job applicants before they are hired to establish a baseline that the candidate is not using drugs, helping protect safety, productivity, and compliance from the start. Random testing is conducted without advance notice during the employment period, which helps deter drug use and catch violations in safety-sensitive roles by making it unpredictable when tests will occur. Other testing types, such as post-accident, periodic, exit, or mandatory/voluntary programs, exist for specific circumstances, but they are used less universally than the combination of pre-employment and random testing.