MBOSE Class 10 Question Paper 2019 for Computer Science New Coursepdf

Total No. of Printed Pages—11
X/19/CSc (N)

2019

COMPUTER SCIENCE

( New Course )

( FOR REGULAR CANDIDATES ONLY )

Full Marks : 80
Pass Marks : 24

Time : 3 hours

The figures in the margin indicate full marks for the questions

SECTION—A
( Maximum Marks : 30 )
( Objective-type Questions )

1. Choose and write the correct answer for the following : 1×10=10

(a) Which of the following is an open-source operating
system?
(i) Mac OS
(ii) MS-DOS
(iii) Microsoft Windows
(iv) Linux

(b) Which of the following DOS commands is used to display
the content of a file?
(i) PRINT
(ii) TYPE
(iii) EDIT
(iv) CLS

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(c) An IP address is a string of _____ bit numeric address.
(i) 32
(ii) 24
(iii) 16
(iv) 8

(d) Which of the following is an empty tag?
(i) <H1>
(ii) <P>
(iii) <BR>
(iv) <NOBR>

(e) Indefinite loop is a/an _____ error.
(i) logical
(ii) execution
(iii) syntax
(iv) compiler

(f) The keyword _____ specifies that the value of the variable
will not change during the execution of the program
in C++.
(i) fixed
(ii) absolute
(iii) constant
(iv) const

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(g) Java was initially known as
(i) OK
(ii) OKA
(iii) OAK
(iv) AOK

(h) All Java programs should have _____ function. It is
considered as the entry point into the program.
(i) user-defined
(ii) main()
(iii) library
(iv) static

(i) Malware comprises of
(i) viruses
(ii) worms
(iii) trojans
(iv) All of the above

(j) Which of the following information security system
provisions in e-commerce ensures that your information
must not be tampered or damaged?
(i) Privacy
(ii) Integrity
(iii) Authentication
(iv) Non-repudiation

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( Short Answer-type Questions )

2. Answer any three questions in 2–3 sentences : 2×3=6

(a) Define system software. What are its functions?

(b) Differentiate between interpreter and compiler.

(c) What is the base of a number system? Give example.

(d) Draw the logical symbol of EXNOR gate with two inputs.

(e) Convert (72)10 into binary equivalent.

3. Answer any three questions in 2–3 sentences : 2×3=6

(a) Differentiate between internet and intranet.

(b) List out different types of wired and wireless connections.

(c) Name any four different types of protocols used over an
Internet network.

(d) Name the tag and attribute for the following :

(i) To draw a blue horizontal line in a Web page

(ii) To make a bulleted list using the circle bullets

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4. Answer any two questions in 2–3 sentences : 2×2=4

(a) Evaluate the following expressions and display the
output :
int x, y=3, z=5;

(i) x=(y>z)?z:y;
cout<<x;

(ii) x= ++ y–z% 3;
cout<<x;

(b) List out the important features of Object-Oriented
Programming Language.

(c) What do you mean by an identifier?

5. Answer any two questions in 2–3 sentences : 2×2=4

(a) Differentiate between while and do…while loops.

(b) What are relational operators? List all the relational
operators with their usage.

(c) Write the steps to evaluate the following expression :
a=6+(b–c% 2);

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SECTION—B
( Maximum Marks : 50 )
( Descriptive-type Questions )

[ Computer Fundamentals ]

6. Either

(a) Differentiate between CUI and GUI based operating
systems with examples for each. 6
Or
(b) Write the commands in operating system to perform the
following operations : 1½×4=6
(i) Display all files with the extension .DOC in the
current directory and all its subdirectories (in DOS)
(ii) Remove Read-Only attribute from the file
REPORT.TXT (in DOS)
(iii) Open the file ‘test.txt’ using the text editor command
(in Linux)

(iv) Create a directory called ‘subdir’ in the current
directory (in Linux)

7. Either

(a) Add (110111)2 , (11110)2 and (1101)2 . Write the ASCII
equivalent character of the result obtained. 6
Or
(b) What are logic gates? Define AND and OR gate. Write their
truth tables using two inputs. 2+2+2=6

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[ Internet Basics ]

8. Either

(a) What is modem? Explain the functions of a modem. 1+4=5
Or

(b) Explain the functions of different parts of URL. 5

9. Either

(a) Debug the following HTML code : 1×5=5
(i) <BODY TEXT="BLUE" IMAGE=
"C:\Users\myphoto.jpg" LINK="RED">
(ii) <BASEFONT COLOUR="Green" FONTSIZE="6">
(iii) <OL TYPE="SQUARE" START="1">

(iv) <IMG LINK="image.jpg" TEXT="Picture Not Found">

(v) <FRAMES SRC="A.html" NAME="Frame1"
SCROLLBAR=Yes>
Or

(b) Write an HTML code to display the table as shown below
(no colour is used) : 5
CLASS MARK REGISTER
Roll No. Student Name Marks
FA SA
1. Abcd 8 27
2. Xyz 7 28

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[ Object-Oriented Programming I—C++ ]

10. Either

(a) Write a program in C++ to display the diameter,
circumference and area of a circle based on the radius
given by the user (Take p = 3 × 141592). 6
Or
(b) Write a program in C++ to display the odd numbers from
101 to 200. 6

11. Either

(a) Write the output generated by the following program
in C++ : 6
# include<iostream.h>
using namespace std;
int main()
{
int count=1, num, sum=0;
cout << "Enter any five integers:\n";
while (count <=5)
{
cin >> num;
sum+=num;
count+=1;
}
cout << "The sum of the five integers=" <<sum<< "\n"
return 0;
}

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Or

(b) Debug the following C++ program to find the factorial of a
number given by the user : 6

( Example : Factorial of 5 is calculated as
5 ! = 1 ´ 2 ´ 3 ´ 4 ´ 5 = 120 )
# include<iostream.h>
# include <conio.h>
int main()
{
int num, fact=1, i=1;
cout<"Enter the number:";
num>cin;
if(num<0);
{
cout<"\nInvalid Input"
}
else
{
do
{
fact=fact * i+;
} while (i<=num)
cout<"The factorial of "<num<<" is "<fact;
}
getch();
}

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[ Object-Oriented Programming II—Java ]

12. Either

(a) Write a program in Java to calculate the sum and average
of a set of integer numbers given by the user. The user
should be allowed to input numbers as long as he/she
wants. 5
Or

(b) Write a program in Java to find whether a given alphabet
is a vowel or a consonant. 5

13. Either

(a) Write the output generated by the following program in
Java : 5
class Output
{
public static void main(String[] args)
{
int num=20;
for(int i=0; i<num; i++ )
{
if (i% 2==0 && i% 3 !=0)
system.out.println(i+" ");
}
}
}

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Or
(b) Debug the following program to compare two numbers
given by the user : 5
import java.util.*;
class Compare
{
public static main(String[] args)
{
sc=new scanner(System.in);
System.println("Enter the first number:");
num1=sc.next();
System.println("Enter the second number:");
num2=sc.next();
if (num1>num2)
System.out.println(num1+"is less than"+num2);
else if (num2>num1)
System.out.println(num1+"is greater than"+num2);
else
System.out.println(num1+"is not equal to"+num2);
}
}

[ Societal Impacts of IT—II ]
14. Either
(a) Define the following terms : 2×3=6
(i) Encryption
(ii) Cipher and ciphertext
(iii) Decryption
Or
(b) Write any six common symptoms of computer system
infected with computer viruses. 6

HHH

X/19/CSc (N)/14 K9—1520