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Solved Question Paper of “Information Technology- Code 802” for Class 12 NSQF Vocational, CBSE Session 2019-2020.

Information Technology (Subject Code-802)
Question Paper for Class 12 Session 2019-2020
Max. Time: 3 Hours                      Max. Marks: 60

Q. 1 Answer. any 4 out of the given 6 questions on Employability Skills (1 x 4 = 4 marks)
i. Is it important to clearly communicate instructions, ideas and concepts that can help you find success in any career? State True/ False
Ans. True

ii. All formulae in Spreadsheet begin with _____ sign
(i) &
(ii) =
(iii) @
(iv) #
Ans. =

iii. _____________ work in collaboration with Green Builders to lay the idea of how the building will look like after its completion. They also provide artistic beauty to buildings to make them look innovative and interesting
Ans.. Green Design Professionals

iv. List one benefit of Team Building
Ans. Boosts morale and leadership skills

v. __________ is feeling extremely nervous and worried because you believe that other people do not like you or are trying to harm you.
(i) Paranoid
(ii) Antisocial
(iii) Narcissistic
(iv) Dependent
Ans.. Paranoid

vi. Personality affects all aspects of an individual’s performance, enlist any two personality traits.
Ans.. (Any two)
(i) Extraversion
(ii) Agreeableness
(iii) Conscientiousness
(iv) Emotional stability

Q. 2 Answer. any 5 out of the given 7 questions (1 x 5 = 5 marks)
i _____________ command is used to modify the value of attribute of one or more tuple in a table.
i. Update
ii. Modify
iii. Alter
iv. Create
Ans. Update

ii Keyword used to display the structure of the table
i. Describe
ii. Show
iii. Select
iv. Display
Ans. Describe

iii ____________ method of a String Class returns true if the length of this string is 0
i. indexAt()
ii. length()
iii. isEmpty()
iv. indexOf()
Ans. is Empty()

iii _____________ Constraint is used to restrict the values of an attribute within a range.
Ans. Check

iv What are member methods??
Answer. methods declared in a class are member methods

v Give one online website of the B2C(Business to Consumer) segment.
Ans. Pepperfry

vi What is the importance of password field on online reservation site.
Ans.. It Keeps the information secure

Q. 3 Answer. any 6 out of the given 7 questions (1 x 6 = 6 marks)
i Predict the Output

int x=9, k=0;
int y=10;
y=++x;
x+=y;
k=x;
What will be the value of k?

Ans.. 20

ii _________________is an e-commerce application where the customer can purchase goods over the Internet.
Ans.. Online Shopping

iii ___________ Phase of Web Application development problem statement for which the web application is to be developed is identified.
i. Requirement
ii. Design
iii. Implementation
iv. Test
Ans. Requirement

iv select distinct dept_name from department; What does the above query do?
a) It gives all the tuples having dept_name
b) It gives the dept_name attribute values of all tuples without repetition
c) It gives all the dept_name attribute of all the tuples
d) It gives all the dept_name attribute of all the tuples
Ans. It gives the dept_name attribute values of all tuples without repetition

v. Define Referential Integrity.
Ans. Referential Integrity is used to check that data entered in one relation is consistent with the data entered in another relation.

vi. Identify the type of operator used
If (A >=B)
(i) Arithmetic
(ii) Relational
(iii) Logical
(iv) Assignment
Ans. Relational

vii. E business offers advantages and opportunities, there are also risks and barriers. These include
(a) Violation of customer privacy
(b) Spikes causing websites to fail at peak times
(c) Internet hackers penetrating company security
d) All of the above
Ans.: All of the above

Q. 4 Answer. any 5 out of the given 6 questions (1 x 5 = 5 marks)
i. What is an Object?
Ans. The object is an instance of a class.

ii Predict the output
double[]Qty = {346, 142, 103, 26.5, 387.5};
System.out.println(Qty[3]);
Answer. 103

iii Define Shopping cart
Answer. Online shopping stores also provide a shopping cart or basket. You can select the products that you wish to buy and add them to your shopping cart.

iv ______________ is not an aggregate function
a. Sum()
b. Count()
c. Round()
d. Avg()
Ans. Round()

v _______________ replaces zero or more number of random character, when used with Like keyword.
a. _
b. %
c. $
d. @
Ans. %

vi _______________ is a special method that every Java application must have.
a. Getter
b. Setter
c. Main
d. Default
Ans. Main

Q. 5 Answer. any 5 out of the given 6 questions (1 x 5 = 5 marks)
i ___________ Phase of Web Application development problem statement for which the web application is to be developed is identified.
v. Requirement
vi. Design
vii. Implementation
viii. Test
Answer. Requirement

ii ____________ method of a String Class Return the index of the first occurrence of given substring
i. indexOf()
ii. indexAt()
iii. length()
iv. isEmpty()
Answer. indexOf()

iii ______________command which displays list of databases available on the current server.
i. Show databases
ii. Show tables
iii. Create tables
iv. Display tables
Answer. Show databases.

iv Define Data Redundancy.
Ans. Same information is stored in more than one file which result in wastage of space.

v _____________is a collection of raw facts which have not been processed to reveal useful information.
Ans. Data

vi ________ method test whether this string end with the given suffix
Ans. endsWith

Q. 6 Answer. any 5 out of the given 6 questions (1 x 5 = 5 marks)

i Which SQL keyword is used to sort the result?
a) ORDER BY
b) SORT
c) ORDER
d) SORT BY
Ans. Order By

ii ____________ commands deletes the tuples from a Table
i. Drop
ii. Delete
iii. Modify
iv. None of the above
Answer. – Delete

iii Define JVM
Ans. Java Virtual Machine (JVM), translates the byte-code into machine code and then executes it.

iv Which of the following is not an example of eGovernance
a. To file property tax
b. To apply for renewal of Passport
c. To start an online coding course for 3 months
d. To get Voters ID card issued
Ans. c. To start an online coding course for 3 months

v Which of the following is an invalid variable declaration?
a) my_string_1
b) 1st_string
c) my string 1
d) _mystring1
Ans. b 1st_string

vi Name one front end and one Back end application to create Web Applications
Ans. Front end Java NetBeAns.
Back end MySQL

Section B: Subjective Type Questions

Answer. any 3 out of the given 5 questions on Employability Skills (2 x 3 = 6 marks)
Answer. each question in 20 – 30 words.

Q. 7 Sandeep has to appear for his first job interview. Mention at least 2 points he shall keep in mind before appearing.
Ans. (Any 2 points)
What to do before an interview
• Get a good night’s sleep the night before.
• Do research.
• Eat a good breakfast.
• Prepare questions beforehand.
• Know who will be interviewing and learn a bit about their background.
• Know your strengths and put together a list of them.
• Turn off your cell phone • Prepare a solid list of references

Q. 8 Self-Motivation is significant in building one’s personality. Comment
Answer.
Self-motivation is important because
• It increases individual’s energy and activity.
• It directs an individual towards specific goals.
• It results in initiation and persistence of specific activities
• It affects cognitive processes and learning strategies used for completing similar tasks

Q. 9 What is Cell referencing in a spreadsheet?
Ans.
A cell reference identifies a cell or a range of cells. Each cell in the worksheet has a unique
address formed by the combination of its intersecting row and column. When a cell
address is referred to in a formula, it is called cell referencing

Q. 10 Rohan has a successful startup company. According to him‘Decision Making is considered to one of the important entrepreneurial competency’. Do you agree with Rohan’s opinion? Justify.
Ans. Yes Decision making is one of the important entrepreneurial competency, entrepreneurs often have to take that one decision at the right time which can define the future of their company. And then they also have to quickly act upon their decisions.

Q. 11 What is the role of Water Quality technician?
Answer. Water Pollution is in its alarming state. This has given rise to the need of Water Quality Technician to help monitor the water quality and treat it.

Answer any 3 out of the given 5 questions in 20 – 30 words each (2 x 3 = 6 marks)

Q. 12 Explain Drop table with Cascade command.

Answer.
Drop Table will be dropped and with the CASCADE option, i.e. all the constraints that refer this table would also be automatically dropped.
Example Drop table teacher Cascade;

Q. 13 The following code has some error(s). Rewrite the correct code underlining all the corrections. Also categorize the loop as Entry / Exit Control Loop.

int p
p = 14;
do;
p = p-2;
System.out.displayln(p);
}while p >= 2
Answer. int p;
p = 14;
do
{
p = p-2;
System.out.println(p);
}while( p >= 2);

Q. 14 Differentiate between = and == operator in JAVA
Answer. = is an assignment operator
== is a comparison operator
For example int a=10;
Will assign a value 10 to variable a
Whereas a==10 will check whether the value of a is 10

Q. 15 Explain Work integrated learning with respect to education sector.
Answer.
For storing information such as student details, marks and result.
For storing information about faculty and staff members.
For storing details about school/college such as infrastructure details, department and
offered course details.

Q. 16 A company is making database of Employees having personal details and Salary details Personal details have columns Empid, Name, Address, BloodGroup. Suggest Columns for Salary Table

Answer. Empid, Basic. Leave, project_details, deductions, allowances

Answer any 2 out of the given 3 questions in 30– 50 words each (3 x 2 = 6 marks)

Q. 17 How eGovernance does empowers the citizens. Give 3 points.
Answer.
E-governance empowers the citizens socially and economically, and enhances their lives by providing them with quality information and better services. It enables citizens to access information directly, without paying any money to a middleman or a tout. It ushers transparency in the system.

Q. 18 Predict the output of the following code; Also categorize the loop as Entry / Exit Control Loop.

int j=1,s=0;
while (j<10)
{
System.out.print(j+”+”);
s=s+j;
j=j+j%3;
}
System.out.println(“=”+s);
Answer. 1+2+4+5+7+8+=27
Entry Control Loop

Q. 19
(i) Mention at least 2 work areas which uses Database Management Systems.

Answer. (any two)
School Management
Hotel Management
Railway reservation
Employee management

(ii) Jatin has given the following query from the table Student but he is unable to execute it successfully. Write the correct query after rectifying the error
Select Name, Marks
From student Table
Where Name =”P%”
Ans. Select Name, Marks
From Student
Where Name Like ‘P%’
(1+2)

Answer any 3 out of the given 5 questions in 50– 80 words each (4 x 3 = 12 marks)

Q. 20 Consider the following table and wrtite SQL statements
Table Menu
ID Item Description Price
P001 Sambar Vada South Indian 40
P002 Dal Maakhani North Indian 150
P003 Noodles Chineese 100
P004 Idli Sabar South Indian 50
P006 Sarson Saag North Indian 170
P007 Dosa South Indian 120
P008 Pizza Italian 200
i. To add a new row with the following data
“P009”, “Lemon Rice”, “South Indian”, 140
ii. Display details of all Menu items in the descending order of Price
iii. Display Item and Description of those Items whose price is between
100 and 150
iv. Add a new column Rating datatype as int to the table Menu

Answer.
(i) Insert into Menu values
(“P009”, “Lemon Rice”, “South Indian”, 140);
(ii) Select * from Menu order by Price;
(iii) Select Item, Description from Menu
Where price between 100 and 150;
(iv) Cardinailty – 7 Degree – 4
(v) Alter Table Menu Add Rating int;

Q. 21 How students are benefitted from online learning? What are the various ways of online learning? Name 2 educational websites
Answer. It provides freedom to the learner to learn at their convenient location, convenient time and at their own pace of learning. Also, there is no discrimination of age, caste, gender, background, or the qualification of the learner. The tutorials may be enriched with audio and video information, which makes learning more enjoyable and attractive. Also, tutorials and tests are available for almost all topics, sometimes in regional languages also.

Types of Online Learning Video/slide tutorials where the video or slides of lectures are available. The learner can visit the site and view the tutorials.

Interactive tutorials require the user to follow the instructions, perform the desired action and get a feedback.
Webinars are real time lectures, where users participate in the lecture, may ask questions, and get their queries Answered.
Example Khan academy, Udacity.org, courser.org

 

Q. 22 Write a program in Java to display Area of a square.
Answer.
static double square area (double side)
{ return (side * side);
}
Differentiate between return type and method arguments with a suitable example
Answer. return type method name(list of parameters separated by commas)
{ statements return statement }
static double rectangle_area (double length, double breadth)
{ return (length * breadth);

Q. 23 Aman wants to shop shoes online. Write detailed Steps/ procedure to be followed while shopping online.
Answer. Open the shopping site, from where you want to shop online.
Login with your username and password
You can select the products that you wish to buy and add them to your shopping cart.
Having selected your products, you can view what you have selected and the total
amount to be paid by you.
We may delete any product from the shopping cart, or proceed for payment.
Read the terms and conditions before making the payment

Q. 24 (i) Write a program in Java to display Area of a square.
Answer.
static double square area (double side)
{ return (side * side);
}
(ii) What are comment entries in Java? Mention two ways to give comments.
Answer.
Comments are used in code by programmers to document their programs – to provide explanatory notes to other people who read the code. This is especially useful in the real world, where large programs are written by one programmer and maintained by other programmers.
Beginning a comment line with two consecutive forward slashes (//)
Writing the comment between the symbols /* and */

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