※This sample exam is different from those that appear in the actual OSS-DB Exam.
SQL statements are generally divided into three types, DDL (Data Definition Language), DML (Data Manipulation Language), and DCL (Data Control Language). DDL refers to SQL commands that define and modify tables such as CREATE TABLE, ALTER TABLE and so forth.
DML refers to SQL commands that performs data manipulation such as SELECT, INSERT, UPDATE, DELETE.
DCL refers to SQL commands that control transactions such as COMMIT and ROLLBACK.
Therefore, the correct answers are C and D