CBSE Class 12 Informatics Practices Sample Paper 2015 Set E

1 (a) This transmission medium is used to carry light signals or laser signals. 

a. Optical Fiber b. Twisted Pair c. Coaxial d. Microwave

(b) There are two computers connected in the range of 130 meters in LAN. They are not able to share the information due to loss of signal. Which device you suggest for smooth communication? 

a. Modem b. UPS c. Repeater d. Router

(c) It refers to unauthorized access of someone else’s data, email data communication.

a. Eavesdropping b. Snooping c. Dos d. Firewall

(d) Differentiate open source & free software. 

(e) Identify the type of topology from the following: 

a. In this topology all the nodes are connected together in an arbitrary fashion.

A link may or may not connect two or more nodes.

b. Each node is connected with the help of a single coaxial cable.

(g) Explain following terms. 

a. Eavesdropping b. Firewall

2 (a) Explain the structure of Switch-Case. 

(b) Explain the term implicit conversion. 

(c) Explain START and TYPE attribute for ordered list. 

(d) Differentiate cellspacing and cellpadding attribute of Table. 

(e) Write the output of following code. 

i. int i=1;

while(i<=5);

{

System.out.println(“”+i);

i=i+2;

}

ii. int no=45;

if(no= =45)

System.out.println(“Correct password”);

System.out.println(“Welcome to my application”);

Else

System.out.println(“Wrong password”);

(f) Explain main features of XML 

(g) Write java code for solve following equation. 

ans =((a +b)2)2

3.(a) Explain the term CLASS. 

(b) Find out the value of res after executing equation.

i. int a=20,b=10; 

res = a++ +b- - +a + ++b -a;

(c) Differentiate combo & list box

Please click the below link to access CBSE Class 12 Informatics Practices Sample Paper 2015 Set E