Biography
New Data-Management-Foundations Exam Vce - Data-Management-Foundations Exam Course
As for the points you may elapse or being frequently tested in the real exam, we give referent information, then involved them into our Data-Management-Foundations actual exam. Our experts expertise about Data-Management-Foundations training materials is unquestionable considering their long-time research and compile. I believe that no one can know the Data-Management-Foundations Exam Questions better than them. And they always keep a close eye on the changes of the content and displays of the Data-Management-Foundations study guide.
It is our promissory announcement that you will get striking by these viable ways. So do not feel giddy among tremendous materials in the market ridden-ed by false materials. With great outcomes of the passing rate upon to 98-100 percent, our Data-Management-Foundations practice materials are totally the perfect one. Different from all other bad quality practice materials that cheat you into spending much money on them, our Data-Management-Foundations practice materials are the accumulation of professional knowledge worthy practicing and remembering.
>> New Data-Management-Foundations Exam Vce <<
Data-Management-Foundations Exam Course | Data-Management-Foundations Valid Exam Duration
Our Data-Management-Foundations practice materials comprise of a number of academic questions for your practice, which are interlinked and helpful for your exam. So their perfection is unquestionable. As a result, Data-Management-Foundations real exam win worldwide praise and acceptance. Our Data-Management-Foundations practice materials are determinant factors giving you assurance of smooth exam. The sooner you make up your mind, the more efficient you will win.
WGU Data Management – Foundations Exam Sample Questions (Q23-Q28):
NEW QUESTION # 23
Which property is associated with a one-field primary key?
- A. Simple
- B. Composite
- C. Numeric
- D. Duplicate
Answer: A
Explanation:
Aprimary keyuniquely identifies each row in a table. When a primary key consists ofonly one field, it is called aSimple Primary Key.
Types of Primary Keys:
* Simple Primary Key (Correct Answer):
* Contains onlyone column.
* Example:
sql
CREATE TABLE Students (
StudentID INT PRIMARY KEY,
Name VARCHAR(50)
);
* Composite Primary Key:
* Usesmultiple columnsto ensure uniqueness.
* Example:
sql
CREATE TABLE Orders (
OrderID INT,
ProductID INT,
PRIMARY KEY (OrderID, ProductID)
);
* Surrogate Primary Key:
* A system-generatedunique identifier(e.g., UUID or AUTO_INCREMENT).
Why Other Options Are Incorrect:
* Option B (Duplicate) (Incorrect):A primary keymust be unique, so itcannot be duplicate.
* Option C (Numeric) (Incorrect):While primary keyscan be numeric, they can also be alphanumeric (VARCHAR).
* Option D (Composite) (Incorrect):Acompositekey consists ofmultiple fields, whereas a simple key is a single field.
Thus, the correct answer isSimple, since aone-field primary keyis a simple primary key.
NEW QUESTION # 24
Which term defines a column, or group of columns, that refers to a primary key in a different table?
- A. Foreign key
- B. Composite key
- C. Simple key
- D. Super key
Answer: A
Explanation:
Aforeign keyis a column (or a set of columns) that establishes arelationship between two tablesby referencing theprimary key of another table.
Example Usage:
sql
CREATE TABLE Departments (
DeptID INT PRIMARY KEY,
DeptName VARCHAR(50)
);
CREATE TABLE Employees (
EmpID INT PRIMARY KEY,
Name VARCHAR(50),
DeptID INT,
FOREIGN KEY (DeptID) REFERENCES Departments(DeptID)
);
* DeptID in Employees is a foreign key, referencing DeptID in Departments.
* Ensuresreferential integrity# DeptID in Employeesmust existin Departments.
Why Other Options Are Incorrect:
* Option A (Super key) (Incorrect):Asuper keyis any set of columns that uniquely identifies a row, but itdoes not reference another table.
* Option B (Simple key) (Incorrect):Asimple keyis asingle-column primary key, not a reference to another table.
* Option C (Composite key) (Incorrect):Acomposite keyconsists ofmultiple columnsbut does not necessarily reference another table.
Thus, the correct answer isForeign key, as it establishes aconnection between two tables.
NEW QUESTION # 25
Which database operation locates the needed table blocks?
- A. Fan-out
- B. Table scan
- C. Binary search
- D. Index scan
Answer: D
Explanation:
Anindex scanis a database operation thatquickly locates table blocksusing anindexrather than scanning the entire table. It significantly improves query performance.
Example Usage:
sql
SELECT * FROM Employees WHERE EmployeeID = 105;
* If EmployeeID isindexed, the database uses anindex scantoquickly find the record.
Why Other Options Are Incorrect:
* Option A (Binary search) (Incorrect):A searching algorithm, but not a database operation.
* Option B (Table scan) (Incorrect):Scans theentire table, which isslowerthan an index scan.
* Option C (Fan-out) (Incorrect):Refers tobranching in B-Treesbut doesnot locate table blocks directly.
Thus, the correct answer isIndex scan, as it efficiently locates table blocks.
NEW QUESTION # 26
Which elements are represented by attributes in the database design documents?
- A. Synonyms
- B. Names
- C. Repositories
- D. Relationships
Answer: B
Explanation:
Attributesin a databaserepresent the properties (names, values, or characteristics) of an entity.
Example Usage:
* In aStudentstable, attributes might include:
StudentID (Primary Key), Name, Age, Major
* Here,Name is an attributedescribing the entityStudent.
Why Other Options Are Incorrect:
* Option A (Synonyms) (Incorrect):Synonyms in SQL allow different names for the same object but are not attributes.
* Option C (Repositories) (Incorrect):A repository stores data butdoes not define attributes.
* Option D (Relationships) (Incorrect):Relationships defineconnections between entities, not their attributes.
Thus, the correct answer isNames, asattributes define entity properties.
NEW QUESTION # 27
What is the role of the transaction manager within the database system architecture?
- A. The transaction manager is composed of a query processor, storage manager, transaction manager, log, and catalog.
- B. The transaction manager logs insert, update, and delete queries, and the result is sent back to the application.
- C. The transaction manager translates the query processor instructions into filesystem commands and uses an index to quickly locate the requested data.
- D. The transaction manager uses information from the catalog to perform query optimization.
Answer: B
Explanation:
ATransaction ManagerensuresACID (Atomicity, Consistency, Isolation, Durability)properties in database transactions. It manages concurrent transactions, ensuring no conflicts occur and logs modifications to support recovery mechanisms.
* Option A (Incorrect):Query optimization is managed by thequery processor, not the transaction manager.
* Option B (Incorrect):The transaction manager is a component of the database architecture but is not composed of the entire system (query processor, storage manager, etc.).
* Option C (Correct):The transaction manager logs transactions like INSERT, UPDATE, and DELETE, ensuring consistency and recoverability.
* Option D (Incorrect):Thestorage manageris responsible for translating queries into filesystem commands.
NEW QUESTION # 28
......
Our company has taken a lot of measures to ensure the quality of Data-Management-Foundations preparation materials. It is really difficult for yourself to hire a professional team, regularly investigate market conditions, and constantly update our Data-Management-Foundations exam questions. But we have all of them done for you. And our Data-Management-Foundations study braindumps have the advantage of high-effective. Just look at our pass rate of our loyal customers, with the help of our Data-Management-Foundations learning guide, 98% of them passed the exam successfully.
Data-Management-Foundations Exam Course: https://www.exams4sures.com/WGU/Data-Management-Foundations-practice-exam-dumps.html
You will love our Data-Management-Foundations study guide for sure, Our company Exams4sures has been putting emphasis on the development and improvement of our Data-Management-Foundations test prep over ten year without archaic content at all, WGU New Data-Management-Foundations Exam Vce So they will be your great helper, WGU New Data-Management-Foundations Exam Vce Do not think that you have bothered our staff, From the above, we can see how important the Data-Management-Foundations certification is.
In each instance, these behaviors occur more frequently Data-Management-Foundations with broadband users than dialup users, When this connection occurs, the user does not get a dial tone because the voice-enabled Data-Management-Foundations Exam Course port that the telephone is connected to is preconfigured with a specific number to dial.
Pass-Sure New Data-Management-Foundations Exam Vce & Leading Provider in Qualification Exams & Fantastic Data-Management-Foundations Exam Course
You will love our Data-Management-Foundations Study Guide for sure, Our company Exams4sures has been putting emphasis on the development and improvement of our Data-Management-Foundations test prep over ten year without archaic content at all.
So they will be your great helper, Do not think that you have bothered our staff, From the above, we can see how important the Data-Management-Foundations certification is.
