(Download) CBSE Class-12 2016-17 Sample Paper And Marking Scheme (Informatics Practices)

Time: 3 Hrs.

M.M. – 70

1 (a) After realizing the issues with proprietary software, Ms. Sunita has decided to use only Open Source Software. Suggest any one suitable open source software to her, for each of the following categories:

i. Operating System
ii. Browser

(b) Expand the following:
i. ODF
ii. PPP

(c) What is Domain Name Resolution? 1
(d) How a Phonetic text entry is different from Keymap based text entry? 1
(e) Which of the following activity can be termed as Eavesdropping:

i. If Jack sets up an unauthorized parallel telephone line to capture the data.
ii. If Jill has stolen his friend’s keyboard.
iii. If Martina installs some receiver hardware to capture the data while on its way.
iv. If Kim gets someone’s login information by casually watching what he/she is typing.

Select the best suitable option from the following:

i. Option i only
ii. Option ii only
iii. Option i and ii both
iv. Option i and iii both

How Eavesdropping is different from snooping by mentioning any one activity which will be termed as snooping?

(f) It’s an era of networking! Almost everyone and everything is connected through one way or the other, hats off to the technology. We have never been so much linked as we are today.

Daniel has just started his hands on practice of networking. Help him in the following:

I. He has just connected 10 computers of his resource room to establish a network. Name the network (LAN/MAN/PAN/WAN) which will be formed. Mention any two main benefits which Daniel could achieve by establishing a network.
II. Help him in identifying the correct topology which has following

Characteristics:

• Its very easy to diagnose the fault in this topology.
• Failure of central hub/switch leads to failure of the entire network.

Depict the topology by drawing the diagram showing 4 interconnected computers through central hub/switch.

2 (a) Shalini is learning Java programming language, as it allows developers to write code that can run on any machine, regardless of architecture or platform. Help her in finding solutions of her problems:

I. She wants to compare two integer values for equality in her java code. Out of (=) and (= =), which operator she should use and why?

II. Help her in writing Java code to initialize two integer variables named num1 and num2 with values 5 and 10 respectively. Increase the value of num1 by 5 and decrease the value of num2 by 5.

(b) Mr. Sahil, a programmer in a VISA processing company, has written the following code:

int ch=Integer.parseInt(jTextField1.getText());
switch(ch)
{
case 1:
jTextField2.setText(“Short Term Single Entry Visa Granted”);
case 2:
jTextField2.setText(“Short Term Multiple Entry Visa Granted”);
case 3:
jTextField2.setText(“Long Term Single Entry Visa Granted”);
case 4:
jTextField2.setText(“Long Term Multiple Entry Visa Granted”);
default:
jTextField2.setText(“Invalid Entry”);
}

No matter what value is being entered in the text field jTextField1, this program always give a message “Invalid Entry”. Help Mr. Sahil in identifying the problem and its reason. Also suggest him a suitable correction in the code.

(c) Realizing the importance of the Internet, Ms. Shikha a Mathematics teacher, has decided to use Internet as a medium to teach her students Mathematics in an interesting way.

I. She wants to design a webpage as shown below to create a mathematics tutorial on the topic “Shapes” using HTML.

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