Q.1 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.
Ans: B
Q.2 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.
Ans: D
Q.3 What is a
relationship called when it is maintained between two entities?
(A) Unary
(B) Binary
(C) Ternary
(D) Quaternary
Ans: B
Q.4 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
Ans: A
Q.5 Which of the
following is a valid SQL type?
(A) CHARACTER
(B) NUMERIC
(C) FLOAT
(D) All of the above
Ans: D
Q.6 The RDBMS
terminology for a row is
(A) tuple.
(B) relation.
(C) attribute.
(D) degree.
Ans: A
Q.7 Which of the
following operations need the participating relations to be union compatible?
(A) UNION
(B) INTERSECTION
(C) DIFFERENCE
(D) All of the above
Ans: D
Q.8 The full form of
DDL is
(A Dynamic Data Language
(B) Detailed Data Language
(C) Data Definition Language
(D) Data Derivation Language
Ans: C
Q.9 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
Ans: D
Q.10 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
Ans: B
Q.11 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.
Ans: B
Q.12 Which database
level is closest to the users?
(A) External
(B) Internal
(C) Physical
(D) Conceptual
Ans: A
Q.13 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
Ans: B
Q.14 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
Ans: D
Q.15 Which of the
following is a comparison operator in SQL?
(A) =
(B) LIKE
(C) BETWEEN
(D) All of the above
Ans: D
Q.16 A set of
possible data values is called
(A) attribute.
(B) degree.
(C) tuple.
(D) domain.
Ans: D
Q.17 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
Ans:C
Q.18 Which of the
following is another name for weak entity?
(A) Child
(B) Owner
(C) Dominant
(D) All of the above
Ans: A
Q.19 Which of the
following database object does not physically exist?
(A) base table
(B) index
(C) view
(D) none of the above
Ans: C
Q.20 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
Ans: D
Q.21 Which of the
following is record based logical model?
(A) Network Model
(B) Object oriented model
(C) E-R Model
(D) None of these
Ans: A
Q.22 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.
Ans: D
Q.23 A file
manipulation command that extracts some of the records from a file is called
(A) SELECT
(B) PROJECT
(C) JOIN
(D) PRODUCT
Ans: A
Q.24 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.
Ans: B
Q.25 Using Relational
Algebra the query that finds customers, who have a balance of over 1000 is
(A) PCustomer_name(s balance >1000(Deposit))
(B) s Customer_name(Pbalance >1000(Deposit))
(C) PCustomer_name(s balance >1000(Borrow))
(D) s Customer_name(Pbalance >1000(Borrow))
Ans: A
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