A. CONCAT (qty_sold, invoice_date) : requires explicit conversion

B. invoice_date = ’15-march-2019’ : uses implicit conversion

C. invoie_date > ’01-02-2019’ : uses implicit conversion

D. qty_sold BETWEEN ‘101’ AND ’110’ : uses implicit conversion

E. qty_sold = ‘0554982’ uses implicit conversion

A. A synonym cannot be created for a PL/SQL package

B. A synonym can be available to all users

C. A SEQUENCE can have a synonym

D. A synonym created by one user can refer to an object belonging to another user

E. Any user can drop a PUBLIC synonym

A. The concatenation operator | | is always evaluated before addition and subtraction in an expression

B. NULLS influence the precedence of operators in an expression

C. The + binary operator has the highest precedence in an expression in a SQL statement

D. Arithmetic operators with equal precedence are evaluated from left to right within an expression

E. Multiple parentheses can be used to override the default precedence of operators in an expression