Introduction to Database System Which command(s) is(are) used to redefine a column of the table in SQL ? MODIFY TABLE all of the listed here DEFINE TABLE ALTER TABLE MODIFY TABLE all of the listed here DEFINE TABLE ALTER TABLE ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System What is the language used by most of the DBMSs for helping their users to access data? High level language Query language 4GL SQL High level language Query language 4GL SQL ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Data encryption techniques are particularly useful for improving data integrity None of these All of these protecting data in data communication systems reducing storage space requirements improving data integrity None of these All of these protecting data in data communication systems reducing storage space requirements ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following refers to something that can be identified in the user's work environment, something that the users want to track? Attribute Entity Identifier Relationship Attribute Entity Identifier Relationship ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A maximum cardinality is the maximum number of entity instances that can participate in a relationship instance. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following is a group of one or more attributes that uniquely identifies a row? Relation Determinant Key Tuple Relation Determinant Key Tuple ANSWER DOWNLOAD EXAMIANS APP
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