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

In a loop semicolon is placed at the end of condition:

• While A
• For B
• Do-while C
• None of these D

-------------------- defines the nature of the relationship

• cardinality A
• entities B
• modality C
• none of these D

Which key does not have uniqueness property?

• Candidate A
• Foreign key B
• Primary key C
• Secondary key D

A \t is used for:

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

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

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

Data type int contain bytes:

• 10 A
• 4 B
• 2 C
• 1 D

Which of the following is a valid format specifier

• %10d A
• %7.2f B
• %-7f 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

Local variables are also called:

• Automatic variables A
• Global variables B
• Grid Variables C
• None of these D

Format specifier starts with the symbol

• # A
• % B
• * C
• all D

Which of the following is basic data distribution strategy?

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

Which of the following keys us not unique:

• Candidate key A
• Forein key B
• Primary key C
• Secondary key D

Which of the following key does not hold uniqueness property ?

• candidate key A
• foreign key B
• primary key C
• Secondary key D

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

Relationship are

• uni-directional A
• bi-directional B
• tri-directional C
• none of these D