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Questions and Answers
What is the primary function of an ACE Scanner?
What is the primary function of an ACE Scanner?
An ACE Scanner can edit text within scanned documents.
An ACE Scanner can edit text within scanned documents.
False (B)
What does ACE stand for in ACE Scanner?
What does ACE stand for in ACE Scanner?
Automated Content Encoding
The ACE Scanner is typically used for __________ documents.
The ACE Scanner is typically used for __________ documents.
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Match the following features with their descriptions:
Match the following features with their descriptions:
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Flashcards
Scanned with ACE Scanner
Scanned with ACE Scanner
The document was scanned using an apparatus called ACE Scanner.
ACE Scanner
ACE Scanner
An apparatus used to scan documents
Document Scanning
Document Scanning
The process of converting physical documents to digital format.
Digital Copies
Digital Copies
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Physical Documents
Physical Documents
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Study Notes
Relational Database Management Systems (RDBMS)
- RDBMS stores data in tables with rows and columns, creating connections between them
- Tables are related using common attributes
- Data in RDBMS is stored in a tabular form
- Normalization is present in RDBMS, ensuring data integrity
- RDBMS uses integrity constraints (e.g., ACID properties) to maintain data accuracy
- Data is stored in tables to maintain relationships between values
- RDBMS supports distributed databases
- RDBMS is suited for handling large amounts and multiple users of data
DBMS vs. RDBMS
- DBMS stores data in files, with no clear relationship between tables
- DBMS does not typically use normalization
- DBMS does not provide inherent security features for data manipulation
- DBMS is primarily designed for smaller organizations and single users
RDBMS Features
- Provides data persistence and storage
- Provides tools for creating indexes
- Facilitates data storage and manipulation
- Enables multi-user access
- Offers data dictionary and metadata collections (data handling)
- Uses SQL as a primary language for data manipulation
- Supports database security and management features for enterprises
- Provides logging for system performance monitoring
- Offers graphical interfaces for database administration
History of RDBMS
- RDBMS is based on E.F. Codd's relational model.
RDBMS Terminology
- Relation: A table in a relational database
- Tuple: A row in a relation (table)
- Attribute: A column in a relation (table)
- Domain: Possible values an attribute can take
- Primary Key: Uniquely identifies a record in a table
- Foreign Key: Links a record in a table to a record in another table
Relational Algebra
- Selection (σ): Selects tuples based on specified criteria
- Projection (π): Selects attributes from a relation
- Union (∪): Combines results from two relations
- Set Difference (-): Finds tuples in one relation but not the other
- Intersection (∩): Finds tuples present in both relations
- Rename (ρ): Renames attributes
- Cartesian Product (×): Combines every tuple in one relation with every tuple in another
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