CBSE Class 12 Informatics Practices Sample Paper 2019 (3)

CBSE Class 12 Informatics Practices Sample Paper 2019 (3). 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) Which wireless communication channel is most appropriate in each of the following situations?

i Communication in a hilly area.

ii Very fast communication between two offices in two different countries.

(b) With what aim UNICODE was developed? 

(C) Expand the following file extensions:

(i) ODF (ii) XML

(d) Give one example of URL and one example of domain name. 

(e) What is the use of repeater in a Network? How is it different from Hub? 

(f) Give two characteristics of Star Topology. Also, show it using a diagram with interconnection of 5 computers.

(g) What is Snooping? 

2 (a) Name method is used to extract value of Index while using ListBox in Java. 

(b) What is the difference between the use of isSelected() and setSelected() methods used with JCheckBox in Java?

(c) Name any two commonly used methods of jComboBox control. 

(d) Name any two attributes used in <img> tag of HTML 

(e) How many times the following loops will execute? Which one of them is Entry Controlled and which one is Exit Controlled?

CBSE Class 12 Informatics Practices Sample Paper 2019 (3)

(f) What will be displayed in jTextField1 and jTextField2 after the execution of the following loop?

int Total =0 ,End=10;

for (int Turn=1,Turn<=End; Turn+=2)

Total++;

jTextField1.setText(Integer.toString(Total));

jTextField2.setText (Integer.toString(Turn));

(g) Differentiate between the <BR> and <HR> tags of HTML with suitable example. 

3 (a) Write a command to add a NOT NULL constraint on FEES column of a student table 

(b) Write SQL command to create a SAVEPOINT called AI. 

(c) Define Foreign Key with reference to RDBMS. 

(d) Table BANK has 2 rows and 3 columns .Table CUSTOMER has 4 rows and 3 columns.

What will be the cardinality and degree of the Cartesian product of them?

(e) There is column HOBBY in a Table CONTACTS .The following two statements are giving different outputs. What may be the possible reason?

SELECT COUNT (*) FROM CONTACTS;

SELECT COUNT (HOBBY) FROM CONTACTS;

(f) Name the methods used to convert one type of data to another in the following statement of java.

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

jTextField2.setText(Integer.toString(Num));

(g) Mr. Tandon is using table EMP with the following columns.

ECODE,DEPT,ENAME,SALARY

He wants to display all information of employees (from EMP table) in ascending order of ENAME and within it in ascending order of DEPT. He wrote the following command, which did not show the desired output.

SELECT * FROM EMP ORDER BY NAME DESC,DEPT;

Rewrite the above query to get the desired output.

4 (a) What will be the content of jTextArea1 and TextField1 after the execution of the following statements?

i jTextArea1.setText( “Go\t Green\n INDIA”) ;

ii String Message = “ All The Best” ;

jTextField1.setText(Message.length () -6)+” “ );

(b) Rewrite the following program code using a while loop statement:

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

for (int C=1; C<=Last; C++)

jTextArea1.setText(Integer.toString (C) ) ;

(c) Observe the following code carefully and find which statement will never get

executed in the code.

int Count=1; // Statement 1

do // Statement2

{ // Statement3

If (Count <15) // Statement4

jTextField1.setText (“Jump”) ; // Statement5

else // Statement6

jTextField1.setText (“STOP”); // Statement7

Count+=4; // Statement8

} // Statement9

while(t<=15); // Statement10

(d) Write java statement to make jButton1 disabled. 

(e) What will be displayed in jTextField1 after the execution of the following code?

int Sum, One=3,Two=5;

Sum =One + Two ++;

jTextField1. setText (Integer.toString(Sum) ) ;

jTextField2.setText (Integer.toString(Two) ) ;

(f) What will be the contents of Text1 and Text2 after the following code is executed? 

String Text2,Text1 ;

Please click the link below to download CBSE Class 12 Informatics Practices Sample Paper 2019 (3).

Tags: 

 


Click to View or Download pdf file
Click for more Informatics Practices Study Material

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

Art Integrated Project work for classes 1 to 10

CBSE Board has decided to introduce Art-Integrated Project work for classes I to X to promote Art-Integrated Learning in schools to make teaching learning Competency-Based and joyful. As part of this, at least one Art-Integrated Project in each subject shall be taken...

Class 12 Board Exams Datesheet Announced

CBSE has announced the datesheet of the remaining class 12 board exams, see below:  

CBSE Decision on Board Exam 2020

The Class 10 and 12 exams are cancelled, and results for both 10th and 12th would be declared by July 15 based on internal exams. CBSE Class 12 students would have the option to appear for the exams at a later date. CBSE has a scheme in which marks scored in past 3...

Board Exams Class 10 and Class 12 Datesheet 2020

CBSE has announced the datesheet for the remaining exams of class 10 and class 12 exams. The exams are going to start in July. The class 10 and 12th board exams will be conducted for the remaining 29 papers from July 1 to July 15, 2020, at various centers nominated by...

CBSE advisory on student marks

CBSE has issued a public advisory for all students to be careful from unscrupulous persons impersonating themselves as officers/officials of CBSE. These people have been contacting parents and have been telling them that they have access to student marks data for Board...

Board Exams Class 10 and 12 Notification by CBSE

Because of the prevailing condition of spread of COVID-19 pandemic in the country, special efforts are required for conducting examinations in a safe manner. As a number of students have shifted from the district of their school to some other district in the country,...

×
Studies Today