Welcome to DataBase Quiz, Advanced Level !!

Question 1. Given the following relation instance.
x  y  z
1  4  2
1  5  3
1  6  3
3  2  2 
Which of the following functional dependencies are satisfied by the instance?

XY -> Z and Z -> Y

YZ -> X and Y -> Z

YZ -> X and X -> Z

XZ -> Y and Y -> X

Question 2. The highest level in the hierarchy of data organization is called

data bank

data base

data file

data record

Question 3. What type of lock will deny users any access to a table?

EXPLICIT

IMPLICIT

EXCLUSIVE

READ ONLY

Question 4. What is the best data type to store the birthdays of the US Presidents, starting with George Washington's birthday of February 22, 1732?

DATETIME

INT

SMALLDATETIME

VARCHAR

Question 5. What will be the output of the following statement? SET ARITHABORT OFF SET ANSI_WARNINGS OFF SELECT 100/0

Null

0

Infinity

Error

Question 6. What will be the output of the following statement? SELECT STR(6365, 3)

***

6365

6,365

6400

Question 7. In SQL, relations can contain null values, and comparisons with null values are treated as unknown. Suppose all comparisons with a null value are treated as false. Which of the following pairs is not equivalent?

x = 5, not (not (x = 5))

x = 5, x > 4 and x < 6, where x is an integer

x < 5, not(x = 5)

none of the above

Question 8. What is the maximum date value that can be stored in a SMALLDATETIME data type?

June 6, 2079

July 6, 2079

December 31, 2079

December 31, 9999

Question 9. Which of the following is true of a network structure?

It is a physical representation of the data

It allows a many-to-many relationship

It is conceptually simple

It will be dominant data base of the future

Question 10. View text definitions are stored in which system table?

sysobjects

syscolumns

syscomments

sysviews