An entity related to itself in an ERD model refers to

• recursive relationship A
• one-to-many relationship B
• many to many relationship C
• on to one relationship D

Organizing the database in computer disk storage is done in:

• Logical design A
• Physical design B
• Analysis C
• Implimentation D

Which of the following can be used as flag value

• + A
• # B
• - C
• all D

Every relation must have:

• Primary key A
• Candidate key B
• Secondary key C
• All of these D

In an E-R diagram, a rectangle represents:

• Entity A
• Attributes B
• Relationship C
• None D

Object used to retrieve data from database is called:

• Forms A
• Repons B
• Queries C
• Tables D

The function clrscr ( ) is defined in

• stdio.h A
• math.h B
• canio.h C
• graphic.h D

A technique for physically arranging the records of a file on secondary storage devices is called:

• Physical pointer A
• Retrieval program B
• File organization C
• Update program D

Which of the following is NOT included in the definition of an entity?

• Person A
• Object B
• Concept C
• Action D

A data model is :

• A logical representation of the structure of the database A
• Shown as an entity-relationship diagram B
• Transformed into tables and relationships C
• All D

An disadvantage of partitioning is:

• Complexity A
• Extra space and update time B
• Inconsistent access speed C
• All D

Which of the following is used to describe the characteristics of an object?

• Attribute A
• Relationship B
• Cardinality C
• Modality D

• mendatory A
• optional B
• may be many C
• none of theses D

The relationship can be:

• One-to-one A
• One-to-many B
• Many-to-many C
• All D

A \t is used for:

• New line A
• Tab B
• Back space C
• None of these D

An attribute is also known as:

• Table A
• Field B
• Row C
• Relation D

Customers,cars and parts are examples of:

• Entities A
• Attributes B
• Cardinals C
• Relashionships D