WGU - D426: Objective Assessment Questions and answers Newest RATED A+ 2025/2026 NEW!!

WGU - D426: Objective Assessment Questions and
answers Newest RATED A+ 2025/2026 NEW!!
Database Application - Correct Answers Software that helps business users interact with
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database systems.
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Il` Database Administrator - Correct Answers Responsible for securing the database system against
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Il` unauthorized users. A database administrator enforces procedures for user access and database
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Il` system availability. Il`




Il` Authorization - Correct Answers Many database users should have limited access to specific
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Il` tables, columns, or rows of a database. Database systems authorize individual users to access
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Il` specific data. Il`




Il` Rules - Correct Answers Database systems ensure data is consistent with structural and business
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Il` rules.



Il` Query Processor - Correct Answers Interprets queries, creates a plan to modify the database or
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Il` retrieve data, and returns query results to the application. Performs query optimization to ensure
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Il` the most efficient instructions are executed on the data.
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Il` Storage Manager - Correct Answers Translates the query processor instructions into low-level
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Il` file-system commands that modify or retrieve data. Database sizes range from megabytes to
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Il` many terabytes, so the storage manager uses indexes to quickly locate data.
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Il` Transaction Manager - Correct Answers Ensures transactions are properly executed. The
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Il` transaction manager prevents conflicts between concurrent transactions. The transaction
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Il` manager also restores the database to a consistent state in the event of a transaction or system
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Il` failure.

,Il` Metadata - Correct Answers Data about the database, such as column names and the number of
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Il` rows in each table.
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Il` Relational Database - Correct Answers Stores data in tables, columns, and rows, similar to a
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Il` spreadsheet.



Il` Relational Database - Correct Answers All _________ ________ systems support the SQL query
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Il` language.



Il` Relational Database - Correct Answers Relational systems are ideal for databases that require an
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Il` accurate record of every transaction, such as banking, airline reservation systems, and student
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Il` records.



Il` MongoDB (NoSQL) - Correct Answers The newer non-relational systems are called NoSQL, for
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Il` 'not only SQL', and are optimized for big data.
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Il` SQL Statements - Correct Answers INSERT inserts rows into a table.
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SELECT retrieves data from a table.
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UPDATE modifies data in a table. Il` Il` Il` Il` Il`




DELETE deletes rows from a table.
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Il` CREATE TABLE (Statement) - Correct Answers A statement that creates a new table by specifying
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Il` the table and column names. Each column is assigned a data type that indicates the format of
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Il` column values. Data types can be numeric, textual, or complex.
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Il` Data Type - Correct Answers INT stores integer values.
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DECIMAL stores fractional numeric values. Il` Il` Il` Il`




VARCHAR stores textual values. Il` Il` Il`

, DATE stores year, month, and day.
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Il` Database Design - Correct Answers Analysis Il` Il` Il` Il` Il` Il` Il` Il` Il`




Logical design Il`




Physical design Il`




Il` Analysis Phase, Conceptual Design, Entity-Relationship Modeling (Database Design) - Correct
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Il` Answers This phase specifies database requirements without regard to a specific database
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Il` system. Requirements are represented as entities, relationships, and attributes. An entity is a
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Il` person, place, activity, or thing. A relationship is a link between entities, and an attribute is a
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Il` descriptive property of an entity. Il` Il` Il` Il`




Il` Logical Design (Database Design) - Correct Answers This phase implements database
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Il` requirements in a specific database system. For relational database systems, _________ design
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Il` converts entities, relationships, and attributes into tables, keys, and columns.
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Il` Physical Design - Correct Answers Specifies indexes, table structures, and partitions. This phase
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Il` adds indexes and specifies how tables are organized on storage media. Affects query processing
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Il` speed but never affects the query result.
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Il` Data Independence - Correct Answers Allows database designers to tune query performance
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Il` without changes to application programs.
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Il` Application Programming Interface (API) - Correct Answers To simplify the use of SQL with a
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Il` general-purpose language, database programs typically use an ____________ _____________ Il` Il` Il` Il` Il` Il` Il` Il`




Il` _______________.



Il` MySQL Command-Line Client - Correct Answers A text interface included in the MySQL Server
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Il` download.