How we check our practice questions

Who writes each question, and from what

Every question is drafted and checked with artificial intelligence (AI). When this page says a reviewer, verifier or checker, it means an AI review run apart from the one that wrote the question. No expert and no exam agency has approved the questions.

Each question is written in our own words from a public source: the board’s Law Book, the Labor Code, Cal/OSHA’s rules, the EDD employer’s guide or the IRS employer’s guide. After you answer, the question shows its source, with a link. We never use questions anyone remembers from the exam.

The check of each question

A separate review, not the one that wrote the question, checked it against its source: the answer, the other options, the explanation, and that the Spanish says what the English says. Each question was approved, fixed and checked again, or rejected. Only approved questions reach the practice.

• 350 Law and Business practice questions were checked, each by a verifier who did not write it, against its own public source (Nov 13 2026). The 37 questions whose wrong options were later rewritten for length were checked again: 387 checks in all.[1]
• 69 of the 345 questions in use were corrected in review (an explanation, a citation or the Spanish); the other 276 passed as written.[1]
• 5 of the 350 questions were rejected and are not used: 2 in the review (one whose answer a second source could make arguable, and one that the 2026 change in the federal 1099 threshold made unclear) and 3 later, in another review, because of how their answer was worded.[1]

A blind check of a sample

• After the review, a second checker drew 100 verified questions at random (30 from contracts and public works, 70 from the other five sections) and checked each one again against its source, without seeing the verifiers' notes (Nov 13 2026).[1]
• Serious errors found in that sample of 100 (a wrong or arguable answer, a false statement, a wrong number, Spanish that changes the meaning, a rule no longer in force): 0. With 95% confidence, fewer than 3% of the bank's questions have one.[1]
• Minor issues found in the same sample (a page number, wording, or a side remark in an explanation): 7 of 100. 6 were fixed the same day, among them two notes on retention that a 2026 law (SB 61) changed, and in the other case the question was rejected.[1]

A sample of 100 questions[1] with no serious error does not prove there are none in the whole bank. Some may remain.

The math problems

A program builds the math problems with new numbers each time. A second program, written separately, solves each one again from its inputs alone and compares its result with the key.

• The math problems are built by a program and solved again by a second program written separately from the law: 149,998 problems (15 kinds, 5,000 number sets each, in Spanish and English), 0 answers that disagreed. 2 problems could not be built; after the program was fixed, a re-run built all 150,000 with 0 disagreements (Nov 13 2026).[1]

When a law changes

Every rule that changed since 2024 carries the date it took effect. A separate review also looked for every change from 2024 to 2026 and checked each question that depended on them.

• On November 13, 2026, a separate review checked 37 changes from 2024 to 2026 in the laws and rules behind the exam, each against the source that contains or announces it. 2 explanations that still called 10% retention common were rewritten (SB 61 capped retention at 5% for contracts from January 1, 2026). No question taught a rule that is no longer in force.[1]

If you see a mistake

Write to hola@contratistalisto.com with the question and what you saw. We check it against its source, then fix it or take it out.