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

An attribute is also known as:

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

Relationship are

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

In ERD model, the relationship between two entities is represented by a

• diamond symbol A
• rectangular box B
• oval symbol C
• line D

Object used to retrieve data from database is called:

• Forms A
• Repons B
• Queries C
• Tables 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

An index may be created on:

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

Which is used to display yes/no values:

• Check box A
• Option buttons B
• Both a & b C
• None of these D

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

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

An disadvantage of partitioning is:

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

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

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

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

Escape sequence starts with the character

• % A
• / B
• # C
• none D

Which of the following is used to associate entities with one another?

• Entity A
• Attribute B
• Identifier C
• Relationship D

Which of the following is a valid format specifier

• %10d A
• %7.2f B
• %-7f C
• all D

Which of the following key does not hold uniqueness property ?

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

Conditional operator is also called:

• True operator A
• Ternary-operator B
• Truth operator C
• All of these D

Data type int contain bytes:

• 10 A
• 4 B
• 2 C
• 1 D