Quize1
Q.46 The file organization that provides very fast access to any arbitrary record of a file is (A) Ordered file (B) Unordered file (C) Hashed file (D) B-tree
C
Q.48 Which of the following are the properties of entities? (A) Groups (B) Table (C) Attributes (D) Switchboards
C
Q.49 In a relation (A) Ordering of rows is immaterial (B) No two rows are identical (C) (A) and (B) both are true (D) None of these.
C
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.
C
Q.58 The full form of DDL is (A Dynamic Data Language (B) Detailed Data Language (C) Data Definition Language (D) Data Derivation Language
C
Q.69 Which of the following database object does not physically exist? (A) base table (B) index (C) view (D) none of the above
C
Q.78 Cross Product is a: (A) Unary Operator (B) Ternary Operator (C) Binary Operator (D) Not an operator
C
Q.8 Architecture of the database can be viewed as (A) two levels. (B) four levels. (C) three levels. (D) one level.
C
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.
A
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.
A
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
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)
A
Q.20 The database environment has all of the following components except: (A) users. (B) separate files. (C) database. (D) database administrator.
A
Q.23 In an E-R diagram an entity set is represent by a (A) rectangle. (B) ellipse. (C) diamond box. (D) circle.
A
Q.3 The view of total database content is (A) Conceptual view. (B) Internal view. (C) External view. (D) Physical View.
A
Q.30 The method in which records are physically stored in a specified order according to a key field in each record is(A) hash. (B) direct. (C) sequential. (D) all of the above.
A
Q.32 Count function in SQL returns the number of (A) values. (B) distinct values. (C) groups. (D) columns.
A
Q.40 The statement in SQL which allows to change the definition of a table is (A) Alter. (B) Update. (C) Create. (D) select.
A
Q.42 SET concept is used in : (A) Network Model (B) Hierarchical Model (C) Relational Model (D) None of these
A
Q.74 The physical location of a record is determined by a mathematical formula that transforms a file key into a record location is : (A) B-Tree File (B) Hashed File (C) Indexed File (D) Sequential file.
B
Q.90 _____________ function divides one numeric expression by another and returns the remainder. (A) POWER (B) MOD (C) ROUND (D) REMAINDER
B
Q.94 The method of access which uses key transformation is known as (A) Direct (B) Hash (C) Random (D) Sequential
B
Q.95 A table joined with itself is called (A) Join (B) Self Join (C) Outer Join (D) Equi Join
B
Q.59 Which of the following is an advantage of view? (A) Data security (B) Derived columns (C) Hiding of complex queries (D) All of the above
D
Q.64 The result of the UNION operation between R1 and R2 is a relation that includes (A) all the tuples of R1 (B) all the tuples of R2 (C) all the tuples of R1 and R2 (D) all the tuples of R1 and R2 which have common columns
D
Q.65 Which of the following is a comparison operator in SQL? (A) = (B) LIKE (C) BETWEEN (D) All of the above
D
Q.66 A set of possible data values is called (A) attribute. (B) degree. (C) tuple. (D) domain.
D
Q.7 ODBC stands for (A) Object Database Connectivity. (B) Oral Database Connectivity. (C) Oracle Database Connectivity. (D) Open Database Connectivity.
D
Q.70 NULL is (A) the same as 0 for integer (B) the same as blank for character (C) the same as 0 for integer and blank for character (D) not a value
D
Q.72 A data dictionary is a special file that contains: (A) The name of all fields in all files. (B) The width of all fields in all files.(C) The data type of all fields in all files. (D) All of the above.
D
Q.81 The natural join is equal to : (A) Cartesian Product (B) Combination of Union and Cartesian product (C) Combination of selection and Cartesian product (D) Combination of projection and Cartesian product
D
Q.84 In E-R Diagram relationship type is represented by (A) Ellipse (B) Dashed ellipse (C) Rectangle (D) Diamond
D
Q.88 A logical schema A) is the entire database B) is a standard way of organizing information into a accessible part C) describe how data is actually stored on disk D) none of these
D
Q.92 In E-R diagram generalization is represented by (A) Ellipse (B) Dashed ellipse (C) Rectangle (D) Triangle
D
Q.68 Which of the following is another name for weak entity? (A) Child (B) Owner (C) Dominant (D) All of the above
A
Q.71 Which of the following is record based logical model? (A) Network Model (B) Object oriented model (C) E-R Model (D) None of these
A
Q.73 A file manipulation command that extracts some of the records from a file is called (A) SELECT (B) PROJECT (C) JOIN (D) PRODUCT
A
Q.76 A primary key is combined with a foreign key creates (A) Parent-Child relation ship between the tables that connect them. (B) Many to many relationship between the tables that connect them. (C) Network model between the tables that connect them. (D) None of the above.
A
Q.80 Consider the join of a relation R with relation S. If R has m tuples and S has n tuples, then the maximum size of join is: (A) mn (B) m+n (C) (m+n)/2 (D) 2(m+n)
A
Q.83 A primary key if combined with a foreign key creates (A) Parent-Child relationship between the tables that connect them. (B) Many to many relationship between the tables that connect them. (C) Network model between the tables that connect them. (D) None of the above.
A
Q.85 Hierarchical model is also called (A) Tree structure (B) Plex Structure (C) Normalize Structure (D) Table Structure
A
Q.87 The ______ operator is used to compare a value to a list of literals values that have been specified. (A) BETWEEN (B) ANY (C) IN (D) ALL
A
Q.89 A B-tree of order m has maximum of _____________ children (A) m (B) m+1 (C) m-1 (D) m/2
A
Q.93 _________ is a virtual table that draws its data from the result of an SQL SELECT statement. (A) View (B) Synonym (C) Sequence (D) Transaction
A
Q.96 _________ data type can store unstructured data (A) RAW (B) CHAR (C) NUMERIC (D) VARCHAR
A
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.
B
Q.19 Related fields in a database are grouped to form a (A) data file. (B) data record. (C) menu. (D) bank.
B
Q.2 Relational calculus is a (A) Procedural language. (B) Non- Procedural language. (C) Data definition language. (D) High level language.
B
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.
B
Q.24 A report generator is used to (A) update files. (B) print files on paper. (C) data entry. (D) delete files.
B
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.
B
Q.45 _______ produces the relation that has attributes of R1 and R2 (A) Cartesian product (B) Difference (C) Intersection (D) Product
A
Q.54 Which of the following operation is used if we are interested in only certain columns of a table? (A) PROJECTION (B) SELECTION (C) UNION (D) JOIN
A
Q.56 The RDBMS terminology for a row is (A) tuple. (B) relation. (C) attribute. (D) degree.
A
Q.62 Which database level is closest to the users? (A) External (B) Internal (C) Physical (D) Conceptual
A
Q.10 The database schema is written in (A) HLL (B) DML (C) DDL (D) DCL
C
Q.28 The relational model feature is that there (A) is no need for primary key data. (B) is much more data independence than some other database models. (C) are explicit relationships among records. (D) are tables with many dimensions.
B
Q.33 Which one of the following statements is false? (A) The data dictionary is normally maintained by the database administrator. (B) Data elements in the database can be modified by changing the data dictionary. (C) The data dictionary contains the name and description of each data element. (D) The data dictionary is a tool used exclusively by the database administrator.
B
Q.37 It is possible to define a schema completely using (A) VDL and DDL. (B) DDL and DML. (C) SDL and DDL. (D) VDL and DML.
B
Q.38 The method of access which uses key transformation is known as (A) direct. (B) hash. (C) random. (D) sequential.
B
Q.4 Cartesian product in relational algebra is (A) a Unary operator. (B) a Binary operator. (C) a Ternary operator. (D) not defined.
B
Q.51 It is better to use files than a DBMS when there are (A) Stringent real-time requirements. (B) Multiple users wish to access the data. (C) Complex relationships among data. (D) All of the above.
B
Q.53 What is a relationship called when it is maintained between two entities? (A) Unary (B) Binary (C) Ternary (D) Quaternary
B
Q.6 'AS' clause is used in SQL for (A) Selection operation. (B) Rename operation. (C) Join operation. (D) Projection operation.
B
Q.60 Which of the following is a legal expression in SQL? (A) SELECT NULL FROM EMPLOYEE; (B) SELECT NAME FROM EMPLOYEE; (C) SELECT NAME FROM EMPLOYEE WHERE SALARY = NULL; (D) None of the above
B
Q.61 The users who use easy-to-use menu are called (A) Sophisticated end users. (B) Naïve users. (C) Stand-alone users. (D) Casual end users.
B
Q.63 Which are the two ways in which entities can participate in a relationship? (A) Passive and active (B) Total and partial (C) Simple and Complex (D) All of the above
B
Q.14 In an E-R diagram attributes are represented by (A) rectangle. (B) square. (C) ellipse. (D) triangle.
C
Q.27 A relational database developer refers to a record as (A) a criteria. (B) a relation. (C) a tuple. (D) an attribute.
C
Q.29 Conceptual design (A) is a documentation technique. (B) needs data volume and processing frequencies to determine the size of the database. (C) involves modelling independent of the DBMS. (D) is designing the relational model.
C
Q.31 A subschema expresses (A) the logical view. (B) the physical view. (C) the external view. (D) all of the above.
C
Q.34 An advantage of the database management approach is (A) data is dependent on programs. (B) data redundancy increases. (C) data is integrated and can be accessed by multiple programs. (D) none of the above.
C
Q.36 Transaction processing is associated with everything below except (A) producing detail, summary, or exception reports. (B) recording a business activity. (C) confirming an action or triggering a response. (D) maintaining data.
C
Q.41 E-R model uses this symbol to represent weak entity set ? (A) Dotted rectangle. (B) Diamond (C) Doubly outlined rectangle (D) None of these
C
Q.44 Key to represent relationship between tables is called (A) Primary key (B) Secondary Key (C) Foreign Key (D) None of these
C
Q.67 Which of the operations constitute a basic set of operations for manipulating relational data? (A) Predicate calculus (B) Relational calculus (C) Relational algebra (D) None of the above
C
Q.82 Which one of the following is not true for a view: (A) View is derived from other tables. (B) View is a virtual table. (C) A view definition is permanently stored as part of the database. (D) View never contains derived columns.
C
Q.86 To delete a particular column in a relation the command used is: (A)UPDATE (B) DROP (C) ALTER (D) DELETE
C
Q.91 A data manipulation command the combines the records from one or more tables is called (A) SELECT (B) PROJECT (C) JOIN (D) PRODUCT
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.
D
Q.13 In a Hierarchical model records are organized as (A) Graph. (B) List. (C) Links. (D) Tree.
D
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.
D
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.
D
Q.35 A DBMS query language is designed to (A) support end users who use English-like commands. (B) support in the development of complex applications software. (C) specify the structure of a database. (D) all of the above.
D
Q.39 Data independence means (A) data is defined separately and not included in programs. (B) programs are not dependent on the physical attributes of data. (C) programs are not dependent on the logical attributes of data. (D) both (B) and (C).
D
Q.47 DBMS helps achieve (A) Data independence (B) Centralized control of data (C) Neither (A) nor (B) (D) both (A) and (B)
D
Q.50 Which of the following is correct: (A) a SQL query automatically eliminates duplicates. (B) SQL permits attribute names to be repeated in the same relation. (C) a SQL query will not work if there are no indexes on the relations (D) None of these
D
Q.52 The conceptual model is (A) dependent on hardware. (B) dependent on software. (C) dependent on both hardware and software . (D) independent of both hardware and software.
D
Q.55 Which of the following is a valid SQL type? (A) CHARACTER (B) NUMERIC (C) FLOAT (D) All of the above
D
Q.57 Which of the following operations need the participating relations to be union compatible? (A) UNION (B) INTERSECTION (C) DIFFERENCE (D) All of the above
D