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WorksheetsDBMS Mcq - 3
Total questions: 25
Worksheet time: 13mins
1. In the relational model, cardinality is termed as:
(A) A number of tuples.
(B) A number of attributes.
(C) A number of tables.
(D) A number of constraints.
2. Relational calculus is a
(A) Procedural language.
(B) Non- Procedural language.
(C) Data definition language.
(D) High-level language.
3. The view of total database content is
(A) Conceptual view.
(B) Internal view.
(C) External view.
(D) Physical View.
4. Cartesian product in relational algebra is
(A) a Unary operator.
(B) a Binary operator.
(C) a Ternary operator.
(D) not defined.
5. DML is provided for
(A) Description of the logical structure of a database.
(B) The addition of new structures in the database system.
(C) Manipulation & processing of the database.
(D) Definition of a physical structure of the database system.
6. ‘AS’ clause is used in SQL for
(A) Selection operation.
(B) Rename operation.
(C) Join operation.
(D) Projection operation.
7. ODBC stands for
(A) Object Database Connectivity.
(B) Oral Database Connectivity.
(C) Oracle Database Connectivity.
(D) Open Database Connectivity.
Q.8 Architecture of the database can be viewed as
(A) two levels.
(B) four levels.
(C) three levels.
(D) one level.
Q.9 In a relational model, relations are termed as
(A) Tuples.
(B) Attributes
(C) Tables.
(D) Rows.
Q.10 The database schema is written in
(A) HLL
(B) DML
(C) DDL
(D) DCL
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.
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.
Q.13 In Hierarchical model records are organised as
(A) Graph.
(B) List.
(C) Links.
(D) Tree.
Q.14 In an E-R diagram attributes are represented by
(A) rectangle.
(B) square.
(C) ellipse.
(D) triangle.
Q.15 In case of entity integrity, the primary key maybe
(A) not Null
(B) Null
(C) both Null & not Null.
(D) any value.
Q.16 In tuple relational calculus P1 ®P2 is equivalent to
(A) ¬P1 Ú P2
(B) P1 Ú P2
(C) P1 Ù P2
(D) P1 Ù¬P2
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
Q.18 A logical schema
(A) is the entire database.
(B) is a standard way of organising information into accessible parts.
(C) describes how data is actually stored on disk.
(D) both (A) and (C)
Q.19 Related fields in a database are grouped to form a
(A) data file.
(B) data record.
(C) menu.
(D) bank.
Q.20 The database environment has all of the following components except:
.
(A) users.
(B) separate files.
(C) database.
(D) database administrator
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.
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) subschema
Q.23 In an E-R diagram an entity set is represented by a
(A) rectangle.
(B) ellipse.
(C) diamond box.
(D) circle.
Q.24 A report generator is used to
(A) update files.
(B) print files on paper.
(C) data entry.
(D) delete files.
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.
