It depends on the program and level. Many undergraduate engineering programs consider the SAT (though a growing number are test-optional); most engineering graduate programs (MS, PhD) have historically used the GRE, though many have also gone test-optional in recent years; the GMAT is specific to MBA/business programs, which some engineers pursue later in their careers for management tracks. Always confirm current requirements directly with your target program.
Most MBA programs now accept either. The GMAT is purpose-built for business school and weights quantitative/data reasoning heavily (its Data Insights section is unique to the GMAT); the GRE is more general and may suit candidates also considering other graduate programs. If you're only applying to MBA programs, check whether your target schools have a preference before choosing.
GMAC has never published the exact formula it uses to combine the three GMAT Focus Edition section scores into the 205-805 composite — it is a proprietary, nonlinear, adaptive-testing-based calculation. This studio's GMAT composite is estimated by averaging your percent-correct across the three sections and mapping that onto the real 205-805 range, which is clearly disclosed on the results screen as a study-purpose approximation, not a predictor of your actual GMAT score.
No. The real GRE's Analytical Writing measure is scored separately (0-6) from an essay response, and it never counts toward the Verbal + Quantitative composite even on the real exam. This site's GRE practice exam is multiple-choice only and does not include or grade an Analytical Writing essay.
No. Every question is original, written in-house to match the real exam's format, topic distribution, and difficulty — not reproductions of actual College Board, ETS, or GMAC test items. See each exam's in-app disclaimer for details.