Download Can this query be executed and is it useful (according to the

1.
Can this query be executed and is it useful (according to the table and column definitions)? SELECT
CTITLE, CID FROM COURSES WHERE CID = ’7820'
A. Query cannot be executed (gives a syntax
error).
C. Query can be executed but returns nonsense.
B. Query can be executed and makes sense
(according to the table and column definitions).
D. None
Correct Option OptionB
2.
Can this query be executed and is it useful (according to the table and column definitions)? SELECT
CTITLE FROM SESSIONS WHERE S_CID = ’7820'
A. Query cannot be executed (gives a syntax
error).has
C. Query can be executed but returns nonsense.
B. Query can be executed and makes sense
(according to the table and column definitions).
D. None
Correct Option OptionA
3.
MySQL runs on which operating systems?
A. Unix and Linux only
C. Unix, Linux, Windows and others
B. Linux and Mac OS-X only
D. Any operating system at all
Correct Option OptionC
4.
DML is provided for
A. Description of logical structure of database.
C. Manipulation & processing of database.
B. Addition of new structures in the database
system.
D. Definition of physical structure of database
system.
Correct Option OptionC
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5.
‘AS’ clause is used in SQL for
A. Selection operation.
C. Join operation.
B. Rename operation.
D. Projection operation.
Correct Option OptionB
6.
In an E-R diagram attributes are represented by
A. rectangle.
C. ellipse.
B. square.
D. triangle.
Correct Option OptionC
7.
Count function in SQL returns the number of
A. values.
C. groups.
B. distinct values.
D. columns.
Correct Option OptionA
8.
The statement in SQL which allows to change the definition of a table is
A. Alter.
C. Create.
B. Update.
D. select.
Correct Option OptionA
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9.
Key to represent relationship between tables is called
A. Primary key
C. Foreign Key
B. Secondary Key
D. None of these
Correct Option OptionC
10.
Which of the following is a valid SQL type?
A. CHARACTER
C. FLOAT
B. NUMERIC
D. All of the above
Correct Option
11.
OptionD
The full form of DDL is
A. Dynamic Data Language
C. Data Definition Language
B. Detailed Data Language
D. Data Derivation Language
Correct Option OptionC
12.
Which of the following is an advantage of view?
A. Data security
C. Hiding of complex queries
B. Derived columns
D. All of the above
Correct Option
OptionD
Page 3 of 8
13.
Which of the following is a comparison operator in SQL?
A. =
C. BETWEEN
B. LIKE
D. All of the above
Correct Option
14.
NULL is
A. the same as 0 for integer
C. the same as 0 for integer and blank for
character
B. the same as blank for character
D. not a value
Correct Option
15.
OptionD
OptionD
To delete a particular column in a relation the command used is:
A. UPDATE
C. ALTER
B. DROP
D. DELETE
Correct Option OptionC
16.
The ______ operator is used to compare a value to a list of literals values that have been specified.
A. BETWEEN
C. IN
B. ANY
D. ALL
Correct Option OptionA
Page 4 of 8
17.
A data manipulation command the combines the records from one or more tables is called
A. SELECT
C. JOIN
B. PROJECT
D. PRODUCT
Correct Option OptionC
18.
A table joined with itself is called
A. Join
C. Outer Join
B. Self Join
D. Equi Join
Correct Option OptionB
19.
Which of the following is not true about ADO.NET?
A. ADO.NET enables to create distributed data
sharing applications
C. ADO.NET doesn't support disconnected
architecture
B. ADO.NET uses XML to transfer data across
applications and data source
D. The classes of ADO.NET are defined in the
System.Data namespace
Correct Option OptionC
20.
Which of the following illustrates the benefit of ADO.NET?
A. Interoperability
C. Disconnected data access
B. It uses DataSet to represent data in memory
that can store data from multiple tables and
multiple sources.
D. All of above
Correct Option
OptionD
Page 5 of 8
21.
Which of the following is the object of .NET data provider?
A. Connection
C. Data Reader
B. Command
D. All of above
Correct Option
22.
OptionD
DataAdapter object populates a DataSet and resolves updates with the data source. Yes or No?
A. True
C.
B. False
D.
Correct Option OptionA
23.
When you create a relationship between tables in ADO.NET DataSet
A. a UniqueConstraint is added to the parent
table
C. Both a and b
B. a ForeignKeyConstraint is added to the child
table by default
D. none of the These
Correct Option OptionC
24.
Which of the following is not true for ADO.NET DataSet?
A. DataSet provides a disconnected view of a
data source.
C. We can create relationship between the tables
in a DataSet.
B. Dataset enables to store data from multiple
tables and multiple sources
D. All of above are true
Correct Option
OptionD
Page 6 of 8
25.
Which of the following method of the command object is best suited when you have aggregate functions in
a SELECT statement?
A. ExecuteScalar
C. ExecuteNonQuery
B. ExecuteReader
D. Non of the these
Correct Option OptionA
26.
Which of the following is the event that is exposed by the DataTable object?
A. RowChanged
C. RowChanging
B. ColumnChanged
D. All of above
Correct Option
27.
OptionD
Which of the following is not the method of DataAdapter?
A. Fill
C. ReadData
B. FillSchema
D. Update
Correct Option OptionC
28.
What is a connection object?
A. Specifies whether to use a DSN or DSN-less
connection
C. Specifies the type of driver to use, database
format and filename
B. Specifies which type of database is being used
D. First opens the initial connection to a database
before giving any database information
Correct Option
OptionD
Page 7 of 8
29.
What information can a connection string contain about the database you are trying to connect to?
A. Type of database
C. user id
B. Location of database
D. All Of The Above
Correct Option
30.
OptionD
What is the sequential procedure in working with databases?
A. Connection string, connection object, close
connection string, close connection object
C. Connection object, connection string, close
connection object, close connection string
B. Connection object, connection string, close
connection string, close connection object
D. None of the these
Correct Option OptionB
Page 8 of 8