STS IBA Grade 5 to 15 Test: A Comprehensive Guide The STS IBA Grade 5 to 15 Test is a standardized test that measures a student's proficiency in the English language. It is administered by the Institute of Business Administration (IBA) in Karachi, Pakistan, and is recognized by universities and colleges both within Pakistan and internationally. The test is divided into two sections: the written section and the oral section. The written section consists of multiple-choice questions that test a student's grammar, vocabulary, reading comprehension, and writing skills. The oral section is an interview with a trained examiner who assesses a student's speaking and listening skills. The written section of the test is divided into four parts: Vocabulary: This section tests a student's knowledge of word meanings and synonyms. Grammar: This section tests a student's understanding of sentence structure, verb tenses, and punctuation. Reading Comprehension: This section test