CBSE Class 12 Informatics Practices Sample Paper 2020 Solved (1)

CBSE Class 12 Informatics Practices Sample Paper 2020 Solved (1). It’s always recommended to practice as many sample papers as possible before the examinations. Students can download the sample papers and also question papers of previous years to practice and score better marks in examinations. Refer to other links too for more sample papers.

1 (a) Draw a network layout of bus topology to connect 5 client computers and 1 server computer.

(b) Mr. John wants to prevent unauthorized access to/from his company's local area network. Write the name of a system (software/ hardware), which he should install to do the same.

(c) Which of the following are open source softwares :

GNU, MS-Office, BOSS, Windows OS

(d) Name the government organization that contributes to the growth of FOSS in India.

(e) Read the given activities carefully and mention whether the activity is snooping or eavesdropping:

i. Getting someone’s login information by casually watching what he/she is typing.

ii. Setting up unauthorized parallel telephone lines

iii. Installing some software/hardware which captures the data while on its way.

iv. Reading the files on someone’s computer in an unauthorized manner.

(d) Kristen has typed the following text in the address bar: http://www.cbse-international.com/help.htm Identify and differentiate the URL and Domain name with reference to the example given above.

(e) Chanakya has to write a paragraph in English on nobel laureates as a part of his holiday homework. He is using a software in which he types the text in Hindi and the software automatically converts the text into English. For example, if he types “नोबेल प्राइज इस गिवेन इन ससक्स कैटेिरीज” the software converts it into “Nobel Prize is given in six categories”.

What kind of text entry is it – phonetic text entry OR keymap based text entry? How is it different from the other kind of text entry?

2 (a) In a java program Rajat wants to use a variable to store the quantity of an item which may be in whole numbers or decimals. Write a suitable java statement to declare the variable for the above mentioned purpose.

(b) What will be the values of num and num1 after execution of the following code:

int num,num1=0;

for(num=100;num<=101;num++)

{

num1= num+2;

--num1;

}

(c) Zia is working with list box. She has placed a list control on her form to display the list of all items available in her shop. She wants to allow the user to select multiple items from her list control. Which property of jList should she use to do the same?

(d) Raman has typed the following code:

int ch=Integer.parseInt(jTextField1.getText());

switch(ch)

{

case 1:jTextField2.setText("Service");

case 2: jTextField2.setText("Complaint");

case 3: jTextField2.setText("Operator");

break;

default: jTextField2.setText("Not a valid entry");

}

On entering the value 1, 2 or 3, he is getting the same output. Mention the possible reason for the same.

(e) Jennifer wants to write html code to create an ordered list starting with “c”. Help her in writing the code

(f) Write any two advantages of xml over html.

(g) Write java code that take any three digit number from the user in jTextField1, calculate the sum of the digits and display it in separate textfield named jTextField2.

For example If the number entered is 432, it should answers as 9 (i.e. 4+3+2).

3. (a) Saumya had previously created a table named ‘Product’ in a database using MySQL. Later on she forgot the table structure. Suggest her suitable MySQL command through which she can check the structure of the already created table.

(b) Roli wants to list the names of all the tables in her database named ‘Gadgets’. Which command (s) she should use to get the desired result.

Please click the link below to download CBSE Class 12 Informatics Practices Sample Paper 2020 Solved (1).