An application for testing programmers contains an initial question version and newer question versions, represented by the following schema:
TABLE questions id INTEGER NOT NULL PRIMARY KEY name VARCHAR(50) NOT NULL parentId INTEGER REFERENCES question(id)
The initial question version has parentId set to NULL, other question versions will have parentId set to the previous version. Each question version can be a parent to only one other question version.
Finish the findAllVersions stored procedure so that it returns, in any order, question version ids that are ancestors or descendants of the given questionId, including the questionId parameter.
See the example case for more details.
- Example case: Wrong answer
- Calling the procedure with the first question in the chain: Wrong answer
- Calling the procedure with the last question in the chain: Wrong answer
- Calling the procedure with the question in the middle of the chain: Wrong answer
Tags
MySQLScore Distribution
Would you like to see our other questions?
We have 850+ premium hand-crafted questions for 50+ job skills and 15+ coding languages. We prefer questions with small samples of actual work over academic problems or brain teasers.
Visit our question libraryPrivate Concierge
Send us an email with an explanation of your testing needs and a list of candidates. We will create an appropriate test, invite your candidates, review their results, and send you a detailed report.
Contact Private ConciergeWould you like to see our tests? The following tests contain MySQL related questions:
On the TestDome Blog
Screening Applicants: The Good, the Bad and the Ugly
Since we’re all biased and we use incorrect proxies, why not just outsource hiring to experts or recruitment agencies? After all, they’ve been screening people for many years, so they must know how to do it right?
Not really. I was surprised to discover that many experts disagree with each other. Everybody praises their pet method and criticizes the others. Many of these methods look legitimate, but are based on...