Answer the following statements true (T) or false (F)
1. In SQL the equal operator is ==, the same as Java.
2. SQL does not provide functions for performing calculations.
3. Systems designers commonly use UML diagrams to show the relationships between database tables.
4. No two rows in a table can have the same value in the primary key column.
1. FALSE
2. FALSE
3. FALSE
4. TRUE
You might also like to view...
Analyze the following program.
``` public class Test { public static void main(String[] args) { try { String s = "5.6"; Integer.parseInt(s); // Cause a NumberFormatException int i = 0; int y = 2 / i; System.out.println("Welcome to Java"); } catch (Exception ex) { System.out.println(ex); } } } ``` a. An exception is raised due to Integer.parseInt(s); b. An exception is raised due to 2 / i; c. The program has a compile error. d. The program compiles and runs without exceptions.
What command can be used to repair a dual boot system?
A. bootsect B. bootrec C. bcdedit D. bootrep
The golden rule when saving images for the Web is to produce the best-looking image with the smallest possible file size. The tool in which an image file is saved affects both image quality and file size.
Answer the following statement true (T) or false (F)
Give examples of schedules that have the following properties
a) The schedule is serializable, but not in commit order (b) The schedule is serializable, but has a dirty read (c) The schedule is not serializable, but does not have a dirty read, a non-repeatable read, or a lost update. (d) The schedule would be permitted at the READ COMMITTED isolation level, but is serializable. (e) The schedule is permitted at READ COMMITTED, but is not serializable (f) The schedule is serializable and would be permitted at SNAPSHOT isolation, but not by a strict two-phase locking concurrency control (g) The schedule is serializable and would be permitted by a strict two-phase locking concurrency control, but not at SNAPSHOT isolation