12th Class ICS Computer Science Online MCQ Test for (Data Base Process)

An entity related to itself in an ERD model refers to :

• Recursive relationship A
• One-to-many relationship B
• Many-to-many relationship C
• One-to-one relationship D

In a relational database a single piece of information is called:

• Table A
• Record B
• Entity C
• Attribute D

Object used to retrieve data from database is called:

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

Escape sequence starts with the character

• % A
• / B
• # C
• none D

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

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

In an E-R diagram, a rectangle represents:

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

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

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

A file is stored in:

• RAM A
• ROM B
• Cache C
• Hard disk D

Which of the following is basic data distribution strategy?

• Centralized A
• Partitioned B
• Replication C
• All D

Which of the following activities are involved in data analysis?

• Data flow diagram A
• Decision Tables B
• Decision Trees C
• All D

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

_______________ refers to a method of database distribution in which one database contains data that are included in another database.

• Splitting A
• Partitioning B
• Replication C
• Dividing D

Format specifier starts with the symbol

• # A
• % B
• * C
• all D

Which of the following can be used as flag value

• + A
• # B
• - C
• all D

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

An disadvantage of partitioning is:

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