CBSE Class 12 Informatics Practices Sample Paper 2018 Set C

Q-1 Answer the following questions

a) Name any two phone operating system(FLOSS).

b) What is a character encoding system?

c) Mr. Rohan need to connect two computers for file sharing. Is it possible to do this without using a hub or router?

d) Differentiate between true type font and open type font.

e) Which of the following are open standards?

(1) .OGG (2) .DOC (3) .TTF (4) .JPEG 

f) 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 in someone’s computer in an unauthorized manner.

g) 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 in Hindi and the software automatically converts the text into English. For example, if he types “नोबेल प्राईज़ इस गिवेन इन गसक्स कातेिोरिज़े ” the software converts it into “Nobel Prize is given in six categories”What kind of type of text entry is it – phonetic text entry Or keymap based text entry?

How is it different from the other kind of text entry?

Q-2 a) Ms. Samhita has developed a java application through which the students of her school can view their marks by entering their admission number. The marks are displayed in various text fields. What should she do so that the students are able to view but not change their marks in text fields.

b) What is inheritance? What are subclass and base class?

c) What is method overloading in java?1

d) 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;

}

1

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.

Q-3a) While creating a table “Mobile data”, Sujata forget to set primary key for the table.

Write the statement to set the column Mobile number as the primary of the table.

b) Abhi wants to undo the changes make during the transaction execution. What command should Abhi used for this purpose?

a) Differentiate between DBMS and RDMS.

b) What is wild character?

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