Q1.
(a) Which protocol is used for the transfer of hyper
text document on the internet. (½)
(b) Which transmission medium should be used
to transfer data across two continents at very high speed.
(½)
(c) Two
neighbourhood school, at a distance of 120 metres from each other, decide to
join their LANs using UTP cables so that they can share their e – learning
resources. But after joining their LANs they are not able to share resources
due to loss of signal in between. Which device should they use to that signal
is amplified in between? (½)
(d) Which of the following software is an Open Source: (½)
Linux, MS Window7, Photoshop.
(e) Distinguish
between Open Sources software and Proprietory software with reference to
customizability of the software. (2)
(f) Name
any two Indian scripts included in Unicode. (1)
(g) Sujata
says that the following numbers indicate an address (1)
208.77.188.166
What is the above
address called? To which object/device
is it assigned?
h)
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Q2. (a) While working in
Netbeans, Ms. Kavita wants to display ‘Pass’ or ‘Needs to Reappear’ message
depending on the marks entered in jTextField. Help her to choose the more
appropriate statement out of ‘If statement’ and ‘Switch statement’. (1)
(b) Write one property and
one method of jListBox. (1)
(C) What will be the value of P and Q after
execution of the following code? (2)
int P,Q =
100
for (P=10;
P<12; P++)
{
Q+ = P;
}
JOptionPane.
showMessageDialog(this, “p + “+P+” Q;”+Q+” );
(D) Write
Java code that takes a number from
jTextField1 and displayed its table in
jTextArea1. (2)
(e.g
6*1=6
6*2=12
…………..
6*10=60)
(E) Name
the property of jPassword which sets the character that will be
displayed instead of Text. (1)
Q3. (a) Define Inheritance, Class, Polymorphism with reference to object oriented
programming. (3)
(b) A
phone number, consisting of 10 digits, is stored in a string variable strPhone.
Now it is required to store this phone number in a Long type variable lngPhone.
Write Java statement to do this.
(c) Write the result stored
in jTextField1 by the following statement: (½)
jTextField1.setText(“Informatics”.substring(3));
(d) Rewrite
the following program code using a for loop: (2)
int
i=1, sum=0;
while
(i<10)
{ sum+=i;
i+=2;
}
(e)Write
different methods of JOptionPane Class. (1½)
(f) The
following code has some error(s). Rewrite the correct code underlining all the
corrections made:
Int
i, j=5;
i==j+5;
if(i=j)
{ jTextField1.setText(“i and j are unequal”);
jTextField2.setText(“they
are not equal”); break;
}
else jTextField1.setText(“i and j are equal”) (2)
(g) I)
What will be the constants of jTextField1
and jTextField2 after executing the following code:
i) jTextField1.setText(Math.round(25.7)+
“ ”); (½)
ii) jTextField2.setText(Math.pow(2,3)+ “ ”); (½)
II) What will be the contents of F1 and F2 after the following code is executed? (1)
String F1=”hello”, F2=”Friend”;
F1=F1.concat(F2);
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b) What is
the difference between setEnabled and setVisible methods of a control?
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c) Write
the purpose of the following statements.
i)
jTextField1.setText("Value"+Math.round(-11.5)); ii) final double g=9.8;
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Q4) A phone Number , consisting
of 10 digits, is stored in a string
variable strPhone. Now it is
required to store this phone number in a long type variable lngPhone. Write a
java statement to do this.
Q5
)What does getpassword() on a password field return ? (1)
(i)
a String (ii) an
integer (iii) a character array
Q6 )Predict Output:
int x = 10;
int y = 15;
System.ou.println((x>y)? 3.14: 3);
int y = 15;
System.ou.println((x>y)? 3.14: 3);
Q7) Convert
the following ‘while loop’ into its equivalent ‘for loop without altering the
output of the program.
int x = 100, a = 30;
while ( x>= 10)
{
System.out.println(”New Amount =”+(x + a));
a++;
x - = a;
}
int x = 100, a = 30;
while ( x>= 10)
{
System.out.println(”New Amount =”+(x + a));
a++;
x - = a;
}
Q8) What
is type casting?
9) Name and explain the usage of any two data types used in Java to store numbers with decimals.
10. What are Keywords? Give two examples of keywords available in Java.
11. Name and explain the usage of any one relational and one logical operator in Java.
12. What is the difference between = and == operator in java?
13. Name the two type of selection statement available in Java.
14. Write the purpose of Switch Statement with the help of an example. Which Java Statement can be used in place of switch statement? In the switch statement, what happens if every case fails and there is no default option?
15. What is the purpose of ‘break’ statement in java?
16. What is the purpose of ‘continue’ statement in java?
17. What is the difference between entry controlled and exit controlled loop
18.What is tooltiptext?
9) Name and explain the usage of any two data types used in Java to store numbers with decimals.
10. What are Keywords? Give two examples of keywords available in Java.
11. Name and explain the usage of any one relational and one logical operator in Java.
12. What is the difference between = and == operator in java?
13. Name the two type of selection statement available in Java.
14. Write the purpose of Switch Statement with the help of an example. Which Java Statement can be used in place of switch statement? In the switch statement, what happens if every case fails and there is no default option?
15. What is the purpose of ‘break’ statement in java?
16. What is the purpose of ‘continue’ statement in java?
17. What is the difference between entry controlled and exit controlled loop
18.What is tooltiptext?
The tooltip text is the text that appears when the user moves the
cursor over a component, without clicking it. The tooltip generally appears in
a small "hover box" within formation about the component being
hovered over.
19.Study the following
code and answer the questions that follow:
double
Number,RoundedNumber;
Number=Double.parseDouble(jTextField1.getText());
RoundedNumber=Math.round(Number*1000)/1000.0;
jTextField2.setText(Double.toString(RoundedNumber));
a) How many variables
have been declared in the above code? Identify and name them.
b) How many objects
have been declared in the above code?
c) Name any one native
class of Java used in the above code.
d) Identify and name a
method of this native class.
e) Name the method used
to convert one type of data to another and also mention the data type before
and after conversion.
Q20) Explain two methods
for converting any form of data type to String type..Give example.
Q21) Differentiate
between concrete class and abstract class.
q22) What
will be the content of jTextField1 and jTextField2 after executing the
following code?
String st="Happy New Year
2012";
jTextField1.setText(""+st.substring(17)+st.length());
jTextField2.setText(st.substring(6).trim());
q23)
Predict output:
Public
static void main(string[] args)
{
String
fullname=”bill gates”;
String
firstname =””;
Firstname=fullname.substring(0,2);
System.out.print(firstname);
Firstname=
FullName.substring(5, 2);
System.out.print(firstname);
Firstname=
FullName.substring( 5, FullName.length( ) - 3 );
System.out.print(firstname);
}
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