CS403 Solved Grand Quiz Spring 2021

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CS403 Solved Grand Quiz Spring 2021

CS403 SOLVED MCQs

 Which is not the function of Database Management System?

  • A user accessible Catalog
  • Concurrency Control Services
  • Failure Response Service
  • Support for Data Communication

 The conceptual database design can be transformed into any ________.

  • Data model
  • Database design
  • E-R model
  • Entity set

Which is the second stage in the database development process?

  • Database design
  • Preliminary Study
  • Physical Design
  • Requirement Analysis

Functional dependencies under interference rule reflexivity are called ________ dependencies.

  • Augmentation
  • Transitivity
  • Projectivity
  • Trivial

If many instances of the “Book” entity are associated with the many instances of the “Student” entity, then the relationship between them is:

  • One to one
  • One to many
  • Many to many
  • Many to one

Which of the following constraints enforces entity integrity?

  1. PRIMARY KEY
  • FOREIGN KEY
  • CHECK
  • NOT NULL

Unary operations involves

  • Only one relation
  • Only two relations
  • More than two relations
  • Not more than five relations

A _____ entity has a primary key that is partially or totally derived from the parent entity in the relationship.

  • Strong
  • Weak
  • o   Business
  • Relationship

In ____________ appropriate data model is chosen.

  • ERD
  • Conceptual Database Design
  • Logical Database Design
  • DFA

            Which of the following is drawback of standardization?

  • Difficult to understand
  • Uniformity
  • Lack of uniqueness
  • Easy to develop applications

Recursive relationship is also called _______.

  • Unary
  • Ternary
  • Primary
  • Secondary

The foreign key attribute, which is present as a primary key in another relation is called as

_________ of the foreign key attribute.

  • Binary relation
  • Composite relation
  • Home relation
  • Recursive relation

DFD does not provide us a way to represent ________

  • Entities
  • Decisions
  • Date stores
  • Processes

A ________ is used to maintain a connection between the users of the database system.

  • Virtual server
  • File server
  • Client server
  • FTP server

Which of the following is an advantage of using the Traditional File Organization?

  • Time consuming
  • Data security
  • Simplicity
  • Efficiency

Which of the following is the input to Analysis Phase?

  • DFD
  • Logical database design
  • Physical database design
  • Data model

Name and _______ are part of the definitions of an attribute.

  1. a.    Domain
  • Symbol
  • Property
  • Entity instance

Which of the following most certainly implies the need for an entire table to implement?

  • A ternary relationship
  • A recursive relationship
  • An identify relationship
  • A binary relationship

Core of the Database Architecture is __________

  • Internal level
  • External level
  • Conceptual level
  • ANSI SPARK

_________ is same as equi-join with a slight difference.

  • Natural join
  • Semi join
  • Outer join
  • Theta join

Conceptual database design is implemented using a _______.

  • Hierarchical data model
  • Semantic data model
  • Relational data model
  • Network data model

Which constraint is generally used for efficiency purposes in the data entry process?

  • Null value
  • Integer value
  • Default value
  • String value

A 3 NF relation is converted to BCNF by

  • Removing composite keys
  • Removing multivalued dependencies
  • Dependent attributes of overlapping composite keys are put in a separate relation
  • Dependent non-key attributes are put in a separate table

Each _______ of a table contains atomic/single value.

  • Cell
  • Row
  • Column
  • Record

A relation is said to be in BCNF when

  • It has overlapping composite keys
  • It has no composite keys
  • It has no multivalued dependencies
  • It has no overlapping composite keys which have related attributes

Which one of the following is not a part of three-level architecture?

  • External level
  • Conceptual level
  • Internal level
  • Physical level

Which of the following is INCORRECT about naming entities?

  • Singular nouns are used
  • Write in capitals
  • Organization specific names can be used
  • Always use abbreviations as they are convenient

An instance is

  • A particular occurance of an entity
  • A special type of relation
  • An attribute of an entity
  • Any particular entity

_________ is an example of metadata

  • Ali
  • Address
  • Person
  • Student

Level of data at which entities or objects exist in reality is called

  • Real world data
  • Schema for real world data
  • Meta data
  • Data about data

There are __________ basic properties of the database relations.

  • Four
  • Three
  • Six
  • Two

How many types of dependencies are?

  • One
  • Two
  • Three
  • Four

In _______ join, only selected rows of a relation are made cross product with second relation.

  • Normal
  • Theta
  • Outer
  • Semi

Which of the following is not a key?

  • Super key
  • Alternate key
  • Integrity constraint key
  • o   Primary key

A collection of concepts that can be used to describe the structure of a database

  • Database
  • DBMS
  • Data model
  • Data

Any combination of attributes with super key is ____

  • Primary key
  • Foreign key
  • Super key
  • Candidate key

Binary relationships are those, which are established between

  • One entity type
  • Two entity type
  • Three entity type
  • Unlimited entities

_________ are called participants, when enrolled in a relationship.

  • Attributes
  • Relations
  • Entities
  • Keys

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

  • One process atleast
  • Two processes atleast
  • One process only
  • Any number of processes

Collection of raw facts is called ______.

  • Information
  • Object
  • Output
  • Data

A software package designed to store and manage database

  • Database
  • DBMS
  • Data model
  • Data

In _______ join common attributes appear twice in the output with selected rows.

  • Normal join
  • Semi join
  • Natural join
  • Equi join

Within a table, each primary key value ______.

  • Is a minimal super key
  • Is always the first field in each table
    • o   Must be numeric
  • Must be unique

________ is not an operation of relational algebra.

  • Addition
  • Union
  • Cartesian product
  • Set difference

Candidate keys which are not selected as primary key are called ______

  • Secondary keys
  • Foreign keys
  • Alternate keys
  • Composite keys

Major benefits of data sharing is:

  • Data of same applications placed at same place.
  • Data of same applications placed at different places
  • Data of different application places at same place
  • Data of different applications stored at placed place

Functional dependency between two attributes or sets of attributes i.e. Q and P is represented as __________.

  • Q → P
  • Q   P
  • Q * P
  • Q + P

Which of the following is not the component of Relational Data Model?

  • Integrity Constraint
  • Manipulation Language
  • Relation / Table
  • Domain Constraint

The attribute that is calculated from other attribute is called _______.

  • Derived attribute
  • Multi-valued attribute
  • Composite attribute
  • Simple attribute

Consider the two attributes “CNIC_NO” and “Registration_NO”. Both the attributes can be used for the unique identification. Now if the user selects the “CNIC_NO” as primary key, then “Registration_NO” is a ____ key.

  • Foreign
  • Secondary
  • Primary
  • Alternative

Which of the following constraint is included in the definition of the table?

  • Default value
  • Foreign key
  • Null
  • o   Domain

The database deals with large amount of data. This property is called

  • Database design
  • Scalability
  • Concurrency
  • Robustness

Which one of the following is NOT a characteristic of meta data?

  • Data about data
  • Describes a data dictionary
  • Self-describing
  • Includes user data

Theta join is denoted mathematically as ________.

  • R X S
  • R X
  • R X   S
  • RX  RS

In cross reference matrix transitions are specified on ______ and database objects are specified on _______.

  • Y axis, X axis
  • X axis, Y axis
  • X axis, X axis
  • Y axis, Y axis

Each component of DBMS performs _______ functions.

  • Similar
  • Different
  • Identical
  • Computational

Which of the following data model is not record based?

  • Hierarchical Data Model
  • Network Data model
  • Semantic Data model
  • Relational Data model

The basic purpose of diamond in ER diagram is to show the _________.

  • Attributes
  • Relationships
  • Composite attribute
  • Entity set

Which of the following tool is used to design conceptual database design?

  • SQL
  • MS Access
  • Oracle
  • This model is independent of any tool

In “one to many” cardinality one instance of a relation is mapped with _______.

  • Many instances of second entity type
  • o   One instance of second entity type
  • Primary key of second relation
  • Foreign key of second relation

Cross reference matrix is developed at the ______ stage of the database.

  • Analysis
  • Designing
  • Implementation
  • Application

The population of the data of the organization for which the database is created is called the

  • _______ of the database.
  • Extension
  • Intension
  • Model
  • Schema

User rights information is stored in

  • Physical database
  • Catalog
  • Logical database
  • Buffer

Logical data independency provides independency to change ______ model.

  • External
  • Logical
  • Conceptual
  • Internal

In natural join the common attribute in the output table appears _______.

  • Twice
  • Three times
  • Four times
  • Once

Which levels are mostly used for detailed DFD?

  • Level-0, Level-1
  • Level-1, Level-2
  • Level-2, Level-3
  • Level-3, Level-4

By default, a non-key attribute in a relation can have ________ value.

  • Binary
  • Null
  • Character
  • Integer

The three levels architecture is useful for ________.

  • Arranging the data in an organized manner
  • Hiding the details of internal systems
  • Breaking the data access restriction
  • Storing definitions of the structures

With the help of _________ technique data values with the smaller sized codes can further

  • reduce the space needed by the data for storage in the database.
  • Compression
  • Expansions
  • Negation
  • Extension

If an entity is linked with itself, than it is called _______ relationship.

  • Binary
  • Ternary
  • Nary
  • Recursive

Duplication of data in controlled redundancy is controlled and _______.

  • Deliberate
  • Necessary
  • Precise
  • Unintentional

Teleprocessing is a sub-type of ______.

  • Single user database
  • Multi-user database
  • File server
  • Client server

In an ERD, the focus is on the ______ and the relationships between them.

  • Attributes
  • Entities
  • Keys
  • Indexes

The most widely used conceptual model is the _____ model.

  • Implementation
  • ER
  • Object oriented
  • Internal

Student and book are two entities, what is the cardinality between the two?

  • Many to one
  • One to many
  • Many to many
  • One to one

RDM is a simple there is just one structure and that is ______.

  • A relation or a table
  • E-R model
  • Attributes
  • Data model

A description on a particular collection of data using the given data model.

  • Database
    • Relation
    • o   Schema
  • None

Consider thy key “CNIC, Name” and choose the best option that describes the key most effectively.

  • The given key is a super key and alternate key.
  • The given key is not a super key but a candidate key.
  • The given key is a super key and candidate key as well.
  • The given key is a super key but not a candidate key.

Normalization is a process of restricting a relation to

  • Minimize duplication of data in a database
  • Maximize duplication of data to ensure reliability
  • Make if of uniform size
  • Allow addition of data

Unary relationship involves a single entity it is also called _______.

  • One to one relationship
  • One to many relationship
  • Many to many relationship
  • Recursive relationship

Which of the following is a part of a DFD but not included in the ERD?

  • The attribute having a single instance
  • The external entity having a single instance
  • The relationship having a single instance
  • The role having a single instance

The database management system (DBMS) is used to

  • Store the data
  • Access the data
  • Manage its users
  • All of above

In cross reference matrix attributes are mention on ______ and reports are mention on

  • _______.
  • Y axis, X axis
  • Y axis, Z axis
  • X axis, Y axis
  • X axis, Z axis

A table can be logically connected to another table by defining a ______.

  • Hyper link
  • Common attribute
  • Primary key
  • Super key

Data Redundancy means

  • Security of data
  • Duplication of data
  • Management of data
  • Recovery of data

Which of the following is a type of dependency?

  • DBMS
  • ERD
  • DFD
  • Referential

In your opinion, why relational database is widely acceptable?

  • Due to its complexity
  • Due to its approach
  • Due to its dependencies
  • Due to its strength

________ is the first comprehensive complete database design.

  • Logical database design
  • Relational database design
  • Conceptual database design
  • Hierarchical database design

How data security can be assured in the database?

  • By hiding data from all
  • Through concurrent access of users
  • By asking users not to share things
  • Implementing encryption algorithms

The attributes whose value is not stored in a database is known as ________ attribute.

  • Stored
  • Single value
  • Multi value
  • Derived

Logical database design, like conceptual database design is our __________

  • Data model
  • Weak entity set
  • Strong entity set
  • Database design

If a single instance of “student” is associated with the many instances of the “subjects” entity, then the relationship between them is:

  • One to one
  • One to many
  • Many to many
  • Many to one

The conceptual database design is drawn through _________.

  • Data model
  • ER model
  • Database design
  • Entity set

A relational database is

  • One that consist of two or more tables
  • A database that is able to process tables, queries, forms, reports and macros
  • o   One that consists of two or more tables that are joined in some way
  • The same as a flat file database

Database is a computerized representation of any organization’s flow of ______ and storage of

  • _____.
  • Data, information
  • Details, data
  • Data, details
  • Information, data

In which stage of the database development process logical design is created?

  • Requirement analysis
  • Database design
  • Physical design
  • Implementation

Which of the following is NOT an entity?

  • Employee
  • Hobby
  • Student
  • Playground

After moving the determined columns from the original table to the new table while converting to 2NF, the determinate becomes the _______ of the new table.

  • Primary key
  • Foreign key
  • Secondary key
  • Composite key

The select operation works horizontally on the table, on the other hand the ___________

  • operates on a single table vertically.
  • Binary operator
  • Project operator
  • Join operator
  • Select operator

Free standing data dictionary is created by

  • DFD
  • Database
  • CASE tools
  • Cross reference matrix

A patient can be an outdoor or indoor. Analyze this statement and tell what type of

  • constraint will be applied on patient?
  • Total completeness
  • Partial completeness
  • Total disjoint
  • Partial disjoint

If A → B and A → C, then A → BC. The inference Rule applies is:

  • Union
  • Decomposition
    • o   Augmentation
  • Reflexivity

Which of the following is the correct abbreviation of ERD?

  • Entity relationship diagram
  • Entity relation diagram
  • Entity reality diagram
  • Entity real distance

Database relation is also represented in a two dimensional structure called ____

  • Row
  • Table
  • Entity
  • Column

Data about data is metadata

  • True
  • False

Which of the following describes the job of a database administrator?

  • Development, implementation operation of the physical database
  • Creation of the system catalog
  • Monitoring and controlling database security and authorization: setting up controls to ensure the quality and integrity of data
    • All of the above

Each table must have a _____ key.

  • Primary
  • Secondary
  • Logical
  • Foreign

A relational database system is based on the concept(s) of:

  • A network of data records
  • Nested tables
  • Tables, row and columns
  • A tree-like structure of data

A → BC and A → B, then A → C follow ______ inference rule.

  • Augmentation
  • Transitivity
  • Projectivity
  • Additivity

Suppose, we have two entities “shape” and “triangle”, then which of the following is a correct statement?

  • Shape is a super type entity and triangle is a sub type entity
  • Shape is a sub type entity and triangle is a super type entity
  • Shape and triangle both are super type entities
  • Shape and triangle both are sub type entities

The entity that is NOT dependent on any other entity for its existence is known as

  • _______ entity.
  • o   Weak
  • Strong
  • Derived
  • Dependent

In cross reference matrix attributes are specified on ________

  • X axis
  • Y axis
  • Z axis
  • None of the above

Which of the following clarify the semantics of a relationship?

  • Entity
  • Roles
  • Relationship set
  • Participants

How many types of cardinality is specified about relationship?

  • Two
  • One
  • Three
  • Four

Which of the following is NOT a component of a DFD?

  • Dataflow
  • Datastore
  • External entities
  • Relationship between external entities

Which of the following provides us the facility to add properties of one entity to another entity automatically?

  • Abstraction
  • Encapsulation
  • Inheritance
  • Dependencies

If there is more than one relationship between two entities and we mentioned role on the relationship link, then it is called:

  • Unary relationship
  • Binary relationships
  • Ternary relationships
  • Multiple relationships

Which one of the following is not an advantage of DBMS

  • Data consistency
  • Recovery procedure is difficult
  • Faster development of new applications
  • Better backup and recovery procedures

In many to many relationship a third table is created for the relationship, which is also called as ________

  • Binary relation
  • o   Associative entity type
  • Unary relationship
  • Composite attributes

When one entity instance of another entity for its existence, then it is called _____

  • Existence dependency
  • Identifier dependency
  • Referential dependency
  • Acceptance dependency

Relational data model is widely accepted due to its mathematically proven foundation and its _____

  • Complexity
  • Simplicity
  • Hierarchical structure
  • Traditional structure

If an entity “motor cycle” is associated with at most one “driver”, then the relationship between these two entities is:

  • One to one
  • One to many
  • Many to many
  • Many to one

Database application is a program which is used for performing certain operations such

  • as
  • Insertion of data
  • Extraction of data
  • Updating the data
  • All of above

Creating the relationships between new tables and their predecessors through the use of foreign keys is general requirements of ________

  • First normal form
  • Second normal form
  • Third normal form
  • Fourth normal form

In ________ the domains of attributes of a relation are atomic, that is they consist of single units that cannot be broken down further.

  • First normal form
  • Second normal form
  • Third normal form
  • Augmentation

Atomicity is a feature of _________.

  • 1NF
  • 2NF
  • 3NF
  • BCNF

The ______ can see entire information structure of the database.

  • o   BA
  • DBTG
  • Database user
  • External viewer

The attribute whose value is not stored in a database is known as _________ attribute.

  • Stored
  • Single value
  • Multi value
  • Derived

_________ are the structure defined for placing data in the attributes while designing physical design of database.

  • Objects
  • Variables
  • Attributes
  • Data types

Suppose a relation has five columns and ten rows, select the correct option to identify cardinality of relation.

  • Five
  • Ten
  • Fifteen
  • Twenty

Which feature of database provides conversion from inconsistent state of DB to a consistent state ensuring minimum data loss?

  • User accessible catalog
  • Data processing
  • Recovery service
  • Authorization service

The maximum PL/SQL size of data type “VARCHAR2” in DBMS is __________ bytes

  • 42767
  • 52767
  • 32767
  • 28767

___________ is state of database where a “course” cannot be inserted in the table, because this course has not been registered to any “student”.

  • Insertion anomaly
  • Deletion anomaly
  • Updation anomaly
  • Redundancy

The maximum PL/SQL size of data type “BLOG” in DBMS is______

  • 4 gigabytes
  • 8 gigabytes
  • 10 gigabytes
  • 12 gigabytes

___________ states that in a relation no attributes of a primary key (PK) can have a null value.

  • Referential integrity constraint
  • Null constraint
  • Domain constraint
  • Entity integrity constraint

A database state where deletion of the information about the student record deletes the course information as well is called __________.

  • Insertion anomaly
  • Updation anomaly
  • Redundancy
  • Deletion anomaly

An entity type is

  • Defined when the database is actually constructed
  • A specific type such as an integer, text, date, logical etc.
  • A coherent set of similar objects that we want to store data on (e.g. STUDENTS, COURSE, CAR)
  • Defined by the database designer

“select” and “project” are the examples of ________

  • Unary operation
  • Binary operation
  • Ternary operation
  • Nary operation

External scheme evolves as user needs are _____ over the time.

  • Ends
  • Modified
  • Switch
  • Stable

An attribute that is the collection of some other attribute(s) is known as _______

  • attributes.
  • Multi-valued
  • Single-valued
  • No-valued
  • Composite

Which of the following is correct regarding Dataflow diagram?

  • Single DFD is required to represent a system
  • The dataflow must be bidirectional
  • Created at increasing levels of detail
  • Used to represent the relationships among the external entities

________ are those attributes that are a combination of two or more than two attributes.

  • Default value
  • Null value
  • Primary key
  • o   Composite attributes

Controlling redundancy in a database management system DOES NOT help to

  • avoid duplication
  • avoid unnecessary wastage of storage space
  • avoid unauthorized access to data
  • avoid inconsistency among data

Which of the following concepts is applicable with respect to 3NF?

  • Full functional dependency
  • Any kind of dependency
  • Transitive dependency
  • Partial functional dependency

Identify the operation which is NOT one of the parts of the five basic set operations in relational algebra?

  • Join
  • Union
  • Cartesian Product
  • Set Difference

Making a change to the conceptual schema of a database but not affecting the existing external schemas is an example of

  • Physical data independence.
  • Concurrency control.
  • Logical data independence.
  • Functional dependency

For a third normal form we concentrate on relations with one ________ key, and we eliminate transitive dependencies

  • Candidate
  • Composite
  • Super key
  • Primary key

The entity relationship diagram is used to graphically represent the ______ database

  • model.
  • Condensed
  • Physical
  • Logical
  • Conceptual

The _______ determines that the link between two entities is optional or mandatory.

  • Maximum cardinality
  • Minimum cardinality
  • Maximum degree
  • Minimum degree

Select the most appropriate statement. Which of the following data model is used to design logical database design?

  • Relational
  • Hierarchal
  • o   bject oriented
  • Any model can be used

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