A Review Of Practical 1D0-541 Practice Test
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NEW QUESTION 1
Which security technique limits access by unauthorized users to parts of an enterprise database?
- A.
Views - B. Concurrency
- C. Locking
- D. Integrity controls
Answer: A
NEW QUESTION 2
Which of the following is a characteristic of the three-tier database architecture?
- A. A Web browser is used as the application server.
- B. The application logic is centralized on a dedicated server.
- C. A thick client is used to perform business application logic functions locally.
- D. Database application logic and database functionality are integrated and reside on a common server.
Answer: B
NEW QUESTION 3
Which term describes an attribute or combination of attributes that uniquely identifies a row in a relation?
- A. Entity
- B. Domain
- C. Primary key
- D. Attribute group
Answer: C
NEW QUESTION 4
Your enterprise is developing a database system that will contain highly sensitive data. Security of the data will take priority over database processing speed. Which database protection technique should be employed?
- A. Backups
- B. User views
- C. Encryption
- D. Integrity controls
Answer: C
NEW QUESTION 5
Consider the Registration relation shown in the exhibit. Which of the following SQL statements would return the Registration2 relation from the Registration relation?
- A. SELECT Course_Code FROM Registration;
- B. SELECT *FROM RegistrationWHERE Registration_ID = 1003 AND Registration_ID = 1005;
- C. SELECT *FROM RegistrationWHERE Course_Code = 'A4343';
- D. SELECT Registration_ID, Student_ID, First_Name, Last_NameFROM RegistrationWHERE Course_Code = 'A4343';
Answer: C
NEW QUESTION 6
Which of the following ACID properties requires that a transaction be executed in its entirety or not all?
- A. Durability
- B. Consistency
- C. Isolation
- D. Atomicity
Answer: D
NEW QUESTION 7
What is a domain?
- A. A normalized set of data applicable to a particular relation
- B. A combination of attributes for a relation
- C. A definition of permissible values for one or more attributes
- D. A set of permissible values for one or more relations
Answer: C
NEW QUESTION 8
Which area of database security involves maintaining access to enterprise data?
- A. Mastered
- B. Not Mastered
Answer: A
NEW QUESTION 9
What is a relational database domain?
- A. A group of attributes
- B. A set of permissible tuple values
- C. A collection of related data items
- D. A set of permissible attribute values
Answer: D
NEW QUESTION 10
Which term best describes one or more database operations that are executed as a single unit?
- A. Update
- B. Transaction
- C. Procedure
- D. Singleton
Answer: B
NEW QUESTION 11
A relation for a construction company is shown in the exhibit. Which of the following best defines the relationship between Cust_ID and Cust_Name?
- A. Cust_Name is the determinant.
- B. Cust_Name is transitively dependent on Cust_ID.
- C. Cust_ID is transitively dependent on Cust_Name.
- D. Cust_Name is functionally dependent on Cust_ID.
Answer: D
NEW QUESTION 12
What is a candidate key?
- A. The primary key for an entity
- B. The key that identifies every instance of an entity
- C. Multiple primary keys that are joined together to form a composite key
- D. A key that may be used to form the primary key
Answer: D
NEW QUESTION 13
Which mechanism provides database users with controlled access to the database through the use of virtual tables?
- A. View
- B. Data dictionary
- C. Database control language
- D. Database management system
Answer: A
NEW QUESTION 14
Consider the entity-relationship (ER) diagram shown in the exhibit. What do the characters at the ends of the connecting line indicate?
- A. Degree of a relation
- B. Cardinality of a relation
- C. Primary key of a relation
- D. Determinant of a relation
Answer: B
NEW QUESTION 15
Which type of entity must reference another entity for its data to be meaningful?
- A. Weak
- B. Strong
- C. Foreign
- D. Primary
Answer: A
NEW QUESTION 16
Which statement accurately describes a characteristic of attributes?
- A. Mastered
- B. Not Mastered
Answer: A
NEW QUESTION 17
Consider the Information Engineering diagram shown in the exhibit for a building management company. Referential integrity must be maintained such that a building cannot be deleted when it has residents. Building_ID, R_ID, Room_Count and Room_Num are integer numbers, whereas Bldg_Name, Location and Res_Name are all represented by variable-length strings with a maximum of 20 characters. Which SQL statement best implements the relations shown in this diagram?
- A. CREATE TABLE BUILDING (Building_ID INTEGER NOT NULL PRIMARY KEY,Bldg_Name VARCHAR (20),Location VARCHAR (20), Room_Count INTEGER ); CREATE TABLE RESIDENT ( R_ID NOT NULL PRIMARY KEY,Room_Num INTEGER, Res_Name VARCHAR (20), Building_ID INTEGER NOT NULL,FOREIGN KEY Building_ID REFERENCES RESIDENT (Building_ID) ON DELETE NO CHECK);
- B. CREATE TABLE BUILDING (Building_ID INTEGER NOT NULL PRIMARY KEY,Bldg_Name VARCHAR (20),Location VARCHAR (20), Room_Count INTEGER ); CREATE TABLE RESIDENT ( R_ID NOT NULL PRIMARY KEY,Room_Num INTEGER, Res_Name VARCHAR (20), Building_ID INTEGER NOT NULL,FOREIGN KEY Building_ID REFERENCES BUILDING (Building_ID) ON DELETE NO CHECKON UPDATE CASCADE);
- C. CREATE TABLE BUILDING (Building_ID INTEGER NOT NULL PRIMARY KEY,Bldg_Name VARCHAR (20),Location VARCHAR (20), Room_Count INTEGER ); CREATE TABLE RESIDENT ( R_ID NOT NULL PRIMARY KEY,Room_Num INTEGER, Res_Name VARCHAR (20), Building_ID INTEGER NOT NULL,FOREIGN KEY Building_ID REFERENCES BUILDING (Building_ID) ON DELETE NO CHECKON UPDATE CASCADE);
- D. CREATE TABLE BUILDING (Building_ID INTEGER NOT NULL PRIMARY KEY,Bldg_Name VARCHAR (20),Location VARCHAR (20), Room_Count INTEGER ); CREATE TABLE RESIDENT ( R_ID NOT NULL PRIMARY KEY,Room_Num INTEGER, Res_Name VARCHAR (20), Building_ID INTEGER NOT NULL,FOREIGN KEY Building_ID REFERENCES BUILDING (Building_ID) ON DELETE NO CHECKON UPDATE CASCADE);
Answer: C
NEW QUESTION 18
Which term best defines a database system in which data records are stored with no structured relationships between the records?
- A. Flat-file database
- B. Relational database
- C. Distributed database
- D. Object-oriented database
Answer: A
NEW QUESTION 19
Consider the relation shown in the exhibit. Which of the following SQL statements would properly add information for a new employee?
- A. Mastered
- B. Not Mastered
Answer: A
NEW QUESTION 20
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