TYPICAL QUESTIONS & ANSWERS OBJECTIVE TYPE QUESTIONS
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DATABASE MANAGEMENT SYSTEMS
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DATABASE MANAGEMENT SYSTEMS
TYPICAL QUESTIONS & ANSWERS
OBJECTIVE TYPE QUESTIONS
Each question carries 2 marks.
Choose the correct or best alternative in the following:
Q.1 In the relational modes, cardinality is termed as:
(A) Number of tuples. (B) Number of attributes.
(C) Number of tables. (D) ...
Choose the correct or best alternative in the following:
Q.1 In the relational modes, cardinality is termed as:
(A) Number of tuples. (B) Number of attributes.
(C) Number of tables. (D) Number of constraints.
Ans: A
Q.2 Relational calculus is a
(A) Procedural language. (B) Non- Procedural language.
(C) Data definition language. (D) High level language.
Ans: B
Q.3 The view of total database content is
(A) Conceptual view. (B) Internal view.
(C) External view. (D) Physical View.
Ans: A
Q.4 Cartesian product in relational algebra is
(A) a Unary operator. (B) a Binary operator.
(C) a Ternary operator. (D) not defined.
Ans: B Cartesian product in relational algebra is a binary operator.
(It requires two operands. e.g., P X Q)
Q.5 DML is provided for
(A) Description of logical structure of database.
(B) Addition of new structures in the database system.
(C) Manipulation & processing of database.
(D) Definition of physical structure of database system.
Ans: C DML is provided for manipulation & processing of database.
(Data stored in the database is processed or manipulated using data manipulation
language commands as its name)
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Q.6 ‘AS’ clause is used in SQL for
(A) Selection operation. (B) Rename operation.
(C) Join operation. (D) Projection operation.
Ans: B ‘AS’ clause is used in SQL for rename operation.
(e.g., SELECT ENO AS EMPLOYEE_NO FROM EMP)
Q.7 ODBC stands for
(A) Object Database Connectivity.
(B) Oral Database Connectivity.
(C) Oracle Database Connectivity.
(D) Open Database Connectivity.
Ans: D
Q.8 Architecture of the database can be viewed as
(A) two levels. (B) four levels.
(C) three levels. (D) one level.
Ans: C
Q.9 In a relational model, relations are termed as
(A) Tuples. (B) Attributes
(C) Tables. (D) Rows.
Ans:
Q.10 The database schema is written in
(A) HLL (B) DML
(C) DDL (D) DCL
Ans: C
Q.11 In the architecture of a database system external level is the
(A) physical level. (B) logical level.
(C) conceptual level (D) view level.
Ans: D
Q.12 An entity set that does not have sufficient attributes to form a primary key is a
(A) strong entity set. (B) weak entity set.
(C) simple entity set. (D) primary entity set.
Ans: B
Q.13 In a Hierarchical model records are organized as
(A) Graph. (B) List.
(C) Links. (D) Tree.
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Ans: D
Q.14 In an E-R diagram attributes are represented by
(A) rectangle. (B) square.
(C) ellipse. (D) triangle.
Ans: C
Q.15 In case of entity integrity, the primary key may be
(A) not Null (B) Null
(C) both Null & not Null. (D) any value.
Ans: A
Q.16 In tuple relational calculus P1 → P2 is equivalent to
(A) ¬P1 ∨ P2 (B) P1 ∨ P2
(C) P1 ∧ P2 (D) P1 ∧ ¬P2
Ans: A In tuple relational calculus P1 P2 is equivalent to ¬P1 ∨ P2.
(The logical implication expression A B, meaning if A then B,is equivalent to ¬A ∨ B)
Q.17 The language used in application programs to request data from the DBMS is referred
to as the
(A) DML (B) DDL
(C) VDL (D) SDL
Ans: A
Q.18 A logical schema
(A) is the entire database.
(B) is a standard way of organizing information into accessible parts.
(C) describes how data is actually stored on disk.
(D) both (A) and (C)
Ans: A
Q.19 Related fields in a database are grouped to form a
(A) data file. (B) data record.
(C) menu. (D) bank.
Ans: B Related data fields in a database are grouped to form a data record.
(A record is a collection of related fields)
Q.20 The database environment has all of the following components except:
(A) users. (B) separate files.
(C) database. (D) database administrator.
Ans: A
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Q.21 The language which has recently become the defacto standard for interfacing application
programs with relational database system is
(A) Oracle. (B) SQL.
(C) DBase. (D) 4GL.
Ans: B
Q.22 The way a particular application views the data from the database that the application
uses is a
(A) module. (B) relational model.
(C) schema. (D) sub schema.
Ans: D
Q.23 In an E-R diagram an entity set is represent by a
(A) rectangle. (B) ellipse.
(C) diamond box. (D) circle.
Ans: A
Q.24 A report generator is used to
(A) update files. (B) print files on paper.
(C) data entry. (D) delete files.
Ans: B
Q.25 The property / properties of a database is / are :
(A) It is an integrated collection of logically related records.
(B) It consolidates separate files into a common pool of data records.
(C) Data stored in a database is independent of the application programs using it.
(D) All of the above.
Ans: D
Q.26 The DBMS language component which can be embedded in a program is
(A) The data definition language (DDL).
(B) The data manipulation language (DML).
(C) The database administrator (DBA).
(D) A query language.
Ans: B
Q.27 A relational database developer refers to a record as
(A) a criteria. (B) a relation.
(C) a tuple. (D) an attribute.
Ans: C
Q.28 The relational model feature is that there
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