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

Which of the following keys us not unique:

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

Which key does not have uniqueness property?

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

Relationship are

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

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

The number of variables that can be used in printf ( ) function are

• one A
• many B
• three C
• zero D

Which of the following is a valid format specifier

• %10d A
• %7.2f B
• %-7f C
• all D

A \t is used for:

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

Which of the following key does not hold uniqueness property ?

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

Local variables are also called:

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

Data type int contain bytes:

• 10 A
• 4 B
• 2 C
• 1 D

A factor to consider when choosing a file organization is:

• Fast retrieval A
• Security B
• Efficient storage C
• All D

The function clrscr ( ) is defined in

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

In an E-R diagram, a rectangle represents:

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

A person's name, birthday and social security number are examples of:

• Attributes A
• Entities B
• Relationships C
• Descriptors D

Customers,cars and parts are examples of:

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

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

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