ECAT Computer Science MCQS Set 7

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ECAT Computer Science MCQS Page 3


Which of the following escape sequence is used for beep
/a
/b
/t
/n

Which of the following is used to associate entities with one another?
Relationship
Entity
Attribute
Identifier

! means
mandatory
optional
may be many
none of theses

Conditional operator is alternative of:
If-else
If
Nested if-else
None of these

Which component of physical database design refers to the consistency of data?
Integrity constaint
Indexes
File organization
Data distribution strategy

Which of the following activities are involved in data analysis?
All
Data flow diagram
Decision Tables
Decision Trees

_______________ refers to a method of database distribution in which different portions of database reside at different nodes in the network.
Partitioning
Spliting
Replication
Dividing

An disadvantage of partitioning is:
All
Complexity
Extra space and update time
Inconsistent access speed

An entity related to itself in an ERD model refers to :
Recursive relationship
One-to-many relationship
Many-to-many relationship
One-to-one relationship

The output of the statement print (“%2f’, 11.4519), is
11.45
11.4519
11.51
11

An index may be created on:
All
Primary key
Secondary key
Foreign key

Escape sequence starts with the character
/
%
#
none

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