Exercises
Test your knowledge with multiple-choice quizzes that explain every answer. Filter by category, subcategory or topic, or search by title.
Teste de preposições em português: pratique em, de, a, para, por e outras regras essenciais de gramática portuguesa.
Start exercisesTest your Portuguese nouns and articles skills with questions on gender, singular and plural forms, and everyday vocabulary translations.
Start exercisesTest your Portuguese grammar and sentence structure skills with verb conjugations, tenses, translations, and everyday phrases.
Start exercisesTest your Portuguese verb conjugation skills with present tense forms of regular and irregular verbs, including falar, ser, ter, ir, and poder.
Start exercisesTest your beginner conversational French skills with essential phrases for greetings, travel, shopping, polite responses, and everyday situations.
Start exercisesTest your French grammar essentials: verb tenses, passé composé, future simple, subjunctive, gender, articles, reflexive verbs and translation.
Start exercisesTest your French B1 skills with common French idiomatic expressions, English meanings, and everyday phrase translations.
Start exercisesTest your French A2 conversational skills with practical phrases for directions, reservations, shopping, apologies, and everyday interactions.
Start exercisesPon a prueba tu comprensión lectora en español con textos sobre reciclaje, clima, historia, tecnología, salud y naturaleza.
Start exercisesTest your Spanish conversational skills with questions on greetings, polite requests, apologies, gratitude, and everyday phrases.
Start exercisesPrueba de comprensión auditiva en español: evalúa vocabulario, ideas principales, detalles, pronunciación y conversaciones cotidianas.
Start exercisesSpanish verbs proficiency test: practice conjugation, tenses, infinitives, gerunds, preterite, future and present subjunctive.
Start exercisesTest your time series analysis knowledge: forecasting, seasonality, stationarity, trends, ACF, outliers, and essential models.
Start exercisesTest your data cleaning essentials knowledge: missing values, outliers, duplicates, normalization, transformation, enrichment, and data quality.
Start exercisesTest your advanced data analytics knowledge with questions on machine learning, clustering, dimensionality reduction, time series, and feature selection.
Start exercisesTest your knowledge of artificial intelligence in business applications, from customer service and analytics to ethics, automation, and HR.
Start exercisesTest intermediate Power BI skills in Power Query, DAX, data modeling, visuals, slicers, bookmarks, publishing, and Q&A.
Start exercisesTest your Introduction to Data Visualization knowledge, from charts and dashboards to heat maps, scatter plots, trends, and data storytelling.
Start exercisesTest your knowledge of cyber security risk management, including risk assessment, CIA, risk appetite, impact, residual risk, and frameworks.
Start exercisesTest your cybersecurity expertise with an advanced malware analysis quiz covering sandboxes, IOCs, hashes, reverse engineering, and detection.
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