The set of values that an attribute can take is called domain. True or False? True False.
Sequential files usually have an EOF mark indicating the end of the file. True or False? True False.
Normally, several records of the file are transferred in each read/write operation, that is, a _____ and usually contains several logical records. record field file block.
The place where information about all the data that make up the database is stored, which contains the logical characteristics of the structures that store the data, their name, description, content, and organization is called: Data dictionary. Database manager. Metadata. DDL.
Within the functions of database management systems, the description function is carried out using which language?: DCL SCL DDL DML.
In sequential files, the file opening mode conditions: No answer is correct. Writing. Reading. Reading or writing.
Records are divided into fields that contain each of the elementary pieces of information that make up a record. True or False? True False.
During its design, a relational database goes through a process known as database normalization. True or False? True False.
Which of the following database management systems is not commercial? Firebird. Foxpro. DB2. Informix.
The percentage of records queried or modified in each file treatment, relative to the total number of records contained in it, is called: Renewal frecuency. TQuery rate. Query frecuency. Renewal rate.
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