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C170 2024 With Complete Solutions Latest Update
C170 2024 With Complete Solutions Latest Update
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C170 2024 With Complete Solutions LatestUpdate
Access plan - correct answers A set of instructions generated at application
compilation time that is created and managed by a DBMS. The access plan
predetermines how an application's query will access the database at run time.
Alias - correct answers An alternative name for a column or table in a SQL
statement.
ALTER TABLE - correct answers The SQL command used to make changes to table
structure. When the command is followed by a keyword (ADD or MODIFY), it adds
a column or changes column characteristics.
AREA - correct answers In DB2, a named section of permanent storage space that
is reserved to store the database.
Atomic attribute - correct answers An attribute that cannot be further subdivided
to produce meaningful components. For example, a person's last name attribute
cannot be meaningfully subdivided.
Atomicity - correct answers The transaction property that requires all parts of a
transaction to be treated as a single, indivisible, logical unit of work. All parts of a
transaction must be completed or the entire transaction is aborted.
automatic query optimization - correct answers A method by which a DBMS finds
the most efficient access path for the execution of a query.
,B-tree index - correct answers An ordered data structure organized as an upside-
down tree.
Base tables - correct answers Tables on which the view is based
batch update routine - correct answers A routine that pools transactions into a
single batch to update a master table in a single operation.
BETWEEN - correct answers In SQL, a special comparison operator used to check
whether a value is within a range of specified values.
binary relationship - correct answers An ER term for an association (relationship)
between two entities. For example, PROFESSOR teaches CLASS.
Bitmap index - correct answers An index that uses a bit array (0s and 1s) to
represent the existence of a value or condition.
Boolean Algebra - correct answers A branch of mathematics that uses the logical
operators OR, AND, and NOT.
Boyce-Codd Normal Form (BCNF) - correct answers A special type of third normal
form (3NF) in which every determinant is a candidate key. A table in BCNF must be
in 3NF. See also determinant.
Candidate Key - correct answers A minimal superkey; that is, a key that does not
contain a subset of attributes that is itself a superkey.
, Cardinality - correct answers A property that assigns a specific value to
connectivity and expresses the range of allowed entity occurrences associated
with a single occurrence of the related entity.
Cascading order sequence - correct answers A nested ordering sequence for a set
of rows, such as a list in which all last names are alphabetically ordered and,
within the last names, all first names are ordered.
Closure - correct answers A property of relational operators that permits the use
of relational algebra operators on existing tables (relations) to produce new
relations.
Composite Attribute - correct answers An attribute that can be further subdivided
to yield additional attributes. For example, a phone number such as 615-898-2368
may be divided into an area code (615), an exchange number (898), and a four-
digit code (2368). Compare to simple attribute.
Composite Entity - correct answers An entity designed to transform an M:N
relationship into two 1:M relationships. The composite entity's primary key
comprises at least the primary keys of the entities that it connects. Also known as
a bridge entity. See also linking table.
Composite Identifier - correct answers In ER modeling, a key composed of more
than one attribute.
Composite Key - correct answers A multiple-attribute key.
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