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CS403 Midterm Past Paper online Practice Quiz

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January 17, 2022

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CS403 Midterm Past Paper

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Practice Quiz from CS403 Midterm Past Paper

This quiz will evaluate your preparation for the CS403 midterm examination and it is based on the past papers of CS403. The purpose of this quiz is to evaluate your performance in this subject. If you can pass this quiz, then there is a great chance that you can secure good marks in your exams.

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Created on January 17, 2022 By

faisal_faisi

CS403

CS403 Midterm Past Papers Practice Quiz

Welcome to CS403 Midterm Online Practice Quiz.

You can check your preparation of CS403 for your Exams here.

Questions Will be different every time you will attempt.

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Category: CS403-mid

1. A collection of related data is

a. Relational model

b. Logical model

c. Data

d. Database

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2. Which of the following concepts is applicable with respect to 2NF?

a. Non-transitive dependency

b. Full functional dependency

c. Transitive dependency

d. Any kind of dependency

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3. Consider the relation Interview(CandidateNo, InterviewDate, InterviewTime, StaffNo, RoomNo) and the following functional dependencies.

FD1 : CandidateNo, InterviewDate -> InterviewTime, StaffNo, RoomNo FD2 : RoomNo, InterviewDate, InterviewTime -> StaffNo, CandidateNo FD3 : StaffNo, InterviewDate -> RoomNo Which of the following is correct?

a. The relation Interview is in 3NF

b. The FD2 violates 2NF

c. The relation Interview is in BCNF.

d. The FD3 violates 3NF.

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4. Which of the following constraints enforces entity integrity?

a. CHECK

b. NOT NULL

c. FOREIGN KEY

d. PRIMARY KEY

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5. Controlling redundancy in a database management system DOES NOT help to

a. avoid duplication

b. avoid inconsistency among data

c. avoid unauthorised access to data

d. avoid unnecessary wastage of storage space

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Category: CS403-mid

6. The ER- data model is an example of:

a. Logical database

b. Conceptual database

c. Relational database

d. Physical database

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7. Select the correct statement among the following.

a. Partial participation which is also called existence dependency is displayed as a double line connecting the participating entity type to the relationship

b. When different entity types participate only once in a single relationship type it is called a recursive relationship

c. Cardinality ratios for binary relationship are displayed on Entity Relationship Diagrams by using a diamond shape notation

d. Role names are not technically necessary in relationship types when all the participating entity types are distinct.

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Category: CS403-mid

8. The Entity Relation Model models

a. Relationships

b. Entities and Relationships

c. Entities, Relationships and Processes

d. Entities

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Category: CS403-mid

9. Which of the following constraints enforces entity integrity?

a. FOREIGN KEY

b. PRIMARY KEY

c. CHECK

d. NOT NULL

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Category: CS403-mid

10. Structural constraints of a relationship type refer to

a. identifying the owner entity type relevant to a given entity type

b. the role that a participating entity from the entity type plays in each relationship instance

c. whether the existence of an entity depends on it being related to another entity via the relationship type.

d. the constraints applicable in granting access to tables, columns and views in a database schema.

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Category: CS403-mid

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

a. Logical data independence

b. Functional dependency

c. Concurrency control.

d. Physical data independence

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12. A relation (from the relational database model) consists of a set of tuples, which implies that

a. relational model supports multi-valued attributes whose values can be represented in sets.

b. for any two tuples, the values associated with all of their attributes may be the same.

c. all tuples in a particular relation may have different attributes

d. all tuples in a relation must be distinct

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Category: CS403-mid

13. Which of the following is true for the relational model?

a. Constraint is a rule that restricts the values in a database

b. Complex key is a key consisting of more than one attribute.

c. Null value is a blank or zero value given to an attribute value when its value is inapplicable or its value is unknown.

d. Degree of a relation is the number of rows in a relation

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

a. Database

b. None of the above

c. Relation

d. Schema

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15. Identify the constraint that limits the values that can be placed in a column.

a. CHECK

b. NOT NULL

c. UNIQUE

d. FOREIGN KEY

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

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

b. all sources/sinks (external entities)

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

d. one process (which represents the entire system)

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

a. index

b. determinant

c. foreign key

d. primary key

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18. Which of the following is a feature of PRIMARY KEY constraint?

a. allow any actions that would destroy links between tables

b. unique identifier for a row within a database table

c. enforces that the column will only accept null values.

d. limit the values that can be placed in a column

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19. Consider the following statements.
A. An entity integrity constraint states that no primary key value can be null.
B. A referential integrity constraint is specified between two relations.
C. A foreign key cannot be used to refer to its own relation.
Identify which of the above statements is/are correct

a. A and B

b. Only A

c. Only B

d. B and C

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

a. M:M

b. 1:M

c. 1:1

d. Ternary

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21. Which of the following is true about relational schema?

a. The sequence of columns is significant

b. Values are atomic

c. Contains only derived attributes

d. The sequence of rows is significant

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22. Database management systems, operating systems, applications and utilities are all examples of ____.

a. input and output

b. hardware

c. computer infrastructure

d. software

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23. A database system allows the following EXCEPT

a. any user to access all its data

b. more critical functions in organisations to be computerised and the need to keep a large volume of data available in an up to the minute current state increased

c. integration of data across multiple applications into a single application

d. management and control of data towards an efficient working of an organisation.

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24. Which of the following functions are NOT performed by a database administrator?

a. Planning, designing and implementing database systems

b. Communicating with database users

c. Establishing standards and procedures for database systems

d. Allocation of storage locations and data structures

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25. Identify the correct statement with respect to normalization

a. Normalization can be used as a top-down standalone database design technique

b. The process of normalization through decomposition must achieve the lossless join property at any cost whereas the dependency reservation property is sometimes sacrificed.

c. Normalization is a formal technique that can be used only at the starting phase of the database design

d. The process of normalization through decomposition must achieve the dependency reservation property at any cost whereas the lossless join property is sometimes sacrificed.

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26. A weak entity type

a. does not have a key attribute(s)

b. none of the above

c. both (a) and (b)

d. must have total participation in an identifying relationship

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27. Select the correct statement about the ANSI/SPARC architecture

a. Any given database has many conceptual schemas and one physical schema, but it has only one external schemas.

b. The conceptual level is a level of indication between the internal level and the external level

c. The internal level in a database system will definitely be relational

d. The external level is not concerned with individual user perceptions, while the conceptual level is concerned with a community user perception.

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

a. A recursive relationship

b. A ternary relationship

c. A binary relationship

d. An identifying relationship

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29. If K is a foreign key in relation R1, then

a. K cannot have a null value for tuples in R1.

b. every tuple of R1 has a distinct value for K.

c. K is a primary key for R1.

d. K is a key for some other relation

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

a. DBMS

b. Database

c. Data

d. Data model

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Note before downloading CS403 midterm past paper

One thing to note dear fellows that you must don’t rely on these papers only. They can be a source of help but not an ultimate solution. If you want to get good marks in your exams you are advised to go through all of your handouts and must watch all of the video lectures.