D426 DATA MANAGEMENT - FOUNDATION OBJECTIVE

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D426 DATA MANAGEMENT - FOUNDATION OBJECTIVE

ASSESSMENT PRACTICE EXAM

Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -99 Questions and Answers

-Format: Multiple-choice / Flashcard

Question 1: Column

Answer:

Has a name and a data type.

Question 2: Rules

Answer:

Governs valid data.

Question 3: Logical Design Phase

Answer:

Implements database requirements in a specific database system. For relational database systems, it converts entities, relationships, and attributes into tables, keys, and columns.

Question 4: Aggregate

Answer:

Performs a calculation on a set of values and returns a single result. They are commonly used to summarize or analyze data, such as calculating sums, averages, counts, or finding maximum or minimum values within a dataset.

Question 5: !=

Answer:

An operator that compares two values for inequality.

Question 6: INT

Answer:

Stores integer values.

Question 7: Metadata

Answer:

Is data about the database, such as column names and the number of rows in each table.

Question 8: CREATE TABLE

Answer:

Statement creates a new table by specifying the table and column names.

Question 9: Composite Primary Key

Answer:

Consists of multiple columns.

Question 10: Table

Answer:

Has a name, a fixed sequence of columns, and a varying set of rows.

Question 11: Union

Answer:

Selects all rows of two tables.

Question 12: UPDATE

Answer:

Modifies data in a table.

Question 13: Logical Constraints

Answer:

Rules that ensure data is valid.

Question 14: % (modulo)

Answer:

Divides one numeric value by another and returns the integer remainder.

Question 15: Data Type

Answer:

Indicates the format column names. These can be numerical, textual or complex.

Question 16: What does the query processor perform?

Answer:

Query optimization to ensure the most efficient instructions are executed on the data.

Question 17: NULL

Answer:

A special value that represents either unknown or inapplicable data.

Question 18: ^

Answer:

Raises one numeric value to the power of another.

Question 19: Row

Answer:

An unnamed tuple of values. Each value corresponds to a column and belongs to the column's data type.

Question 20: Data Control Language (DCL)

Answer:

Controls database user access.

Question 21: Data Manipulation Language (DML)

Answer:

Manipulates data stored in a database.

Question 22: MERGE

Answer:

A statement that selects data from one table, called the source, and inserts the data to another table, called the target.

Question 23: Data Type

Answer:

A named set of values, from which column values are drawn.

Question 24: Error Code

Answer:

Generated when a SQL statement is syntactically incorrect or the database cannot execute the statement.

Question 25: IN

Answer:

An operator used in a WHERE clause to determine if a value matches one of several values.

Question 26: Transaction Manager

Answer:

The transaction manager ensures efficient transaction execution, prevents conflicts between concurrent transactions, and restores the database to a consistent state in case of a transaction or system failure.

Question 27: Analysis

Answer:

Has many alternative names, conceptual design, entity-relationship modeling, and requirements definition.

Question 28: Literals

Answer:

Explicit values that are string (surrounded by single or double quotes), numeric, or binary (represented with x'0', where '0' is any hex value).