Question # 1

Which of the following is true about DELETE command?

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is DDL Command

Resets identity of the table

cannot activate a trigger

Can be Rolled back

Identify the INCORRECT statement among the given.

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An entity may be an object with a physical existence like a car, a house or an Employee

One cannot consider something which has conceptual existence like a course in a degree program as an entity

Age can be considered as a single value attribute of a person.

An entity type describes the schema or intension for a set of entities which share the same structure.

Which of the following is incorrect with respect to indexed sequential files?

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New records are added to an overflow file

Record in main file that precedes it is updated to contain a pointer to the new record

The overflow is merged with the main file during a batch update

Multiple indexes for the same key field cannot be setup

Which of the following is NOT a component of a DFD? Select correct option:

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Dataflow

Datastore

External entities

Relationship between external entities

Which key word is available in SQL to enforce referential integrity?

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Check

Primary Key

Set Default

Unique

Which of the following is NOT a feature of Context DFD?

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one process (which represents the entire system)

all sources/sinks (external entities)

data flows linking the process to the sources and sinks (external entities)

sub-processes (which explain and decomposed the major process into small processes)

_______is a control that enables users to select one option from an associated list; users can also type an option.

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Combo box

Button

Text box

Static area

DML commands are used for:

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inserting data into databases

creating databases

destroying databases

creating DB objects

As part of database naming conventions, attribute names should use suffixes such as ID, NUMBER or CODE for the _______.

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primary key

foreign key

index

determinant

Incase of Context-level Diagram, the system is represented by

Select correct option:

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One process atleast

Two processes atleast

One process only

Any number of processes

In a conceptual model for a university, what type of relationship exists between Grade and Student entities?

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1:1

1:M

M:M

Ternary

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