Loading page
CertifyOS
Practice questions for the skills this job lists, plus common questions for any interview. These are for practice: we don’t know the employer’s actual questions.
Write a query for the second-highest salary in each department.
SQL
Explain the difference between INNER, LEFT and FULL joins with an example.
SQL
When would you use XLOOKUP or INDEX/MATCH, and how do pivot tables help summarise data?
Excel
Tell me about a process you made faster or cheaper. How did you measure it?
This kind of role
What do you know about CertifyOS's products and customers?
CertifyOS
Tell me about yourself in two minutes, focused on this role.
About you
Why this company, and why this role?
About you
Tell me about a time you disagreed with a teammate. What happened?
About you
Describe a time you failed or missed a deadline, and what you changed afterwards.
About you