Class: XII
Database Management Applications-(795)
Sample Question Paper 2019-20
Attempt any ten from the following 10 x 1=10
1. The number of attributes in a relation is called the ____________of a relation.
a. Tuple
b. Table
c. Cardinality
d. Degree
2. In order to restrict the values of an attribute within a range, _________constraint to be used.
a. Check
b. NULL
c. Default
d. NOT NULL
3. _______________ command is used to eliminate duplicate values of an attribute in the select query
a. Update
b. Unique
c. Distinct
d. No Duplicate
4. _____________ command is used to delete the structure of the table
a. Drop Table
b. Drop Database
c. Delete Table
d. Alter Table
5. ________________is the use of electronic i.e. information and communication technology (ICT) tools for governance by the government for the citizens
a. E Learning
b. e Commerce
c. E-Governance
d. E payment
6. E business offers advantages and opportunities, there are also risks and barriers. These include
a Violation of customer privacy
b Spikes causing websites to fail at peak times
c Internet hackers penetrating company security
d All of the above
7. Which segment do Flip Kart belong to ?
a B2B (Business to Business)
b C2C (Consumer to Consumer)
c C2B (Consumer to Business)
d B2C (Business to Consumer)
8. ____________ translates the byte code into machine code and then executes it.
9. _____________ is a method convert the string into its integer equivalent.
a. Integer.toString()
b. Integer.valueOf()
c. Integer.parseInt()
d. Float.parseFloat()
10. Which of the following statements is false about objects?
a. Object is an instance of a class
b. Object is capable of storing data
c. Each object has its own copy of methods
d. None of the above
11. ___________ statement is used to use a prebuilt class and associated methods in those class from the package
a. Include
b. Public
c. Extend
d. Import
12.___________ method of a String class converts all of the characters in this String to lower case
a. Lcase()
b. toLowerCase()
c. toLcase()
d. isLower()