Computer Applications 2015-2016 (English Medium) ICSE Class 10 Question Paper Solution

Define Encapsulation.

What are keywords ? Give an example.

Name any two library packages.

Name the type of error ( syntax, runtime or logical error) in each case given below: 

(i) Math.sqrt (36 – 45)
(ii) int a;b;c;

If int x [ ] = { 4, 3,7, 8, 9,10}; what are the values of p and q ?

(i) p = x.length
(ii) q = x[2] + x[5] * x[1]

State the difference between == operator and equals () method. 

What is the type of casting shown by the following example: 

char c = (char) 120;

What is the type of casting shown by the following example?

int x = 't'; 

Differentiate between formal parameter and actual parameter. 

Write a function prototype of the following: 

A function PosChar which takes a string argument and a character argument and returns an integer value.

Name any two types of access specifiers.

Give the output of the following string functions:

1. "MISSISSIPPI".indexOf('S') + "MISSISSIPPI".lastIndexOf('I')
2. "CABLE".compareTo("CADET") 

Give the output of the following Math functions: 

(i) Math.ceil(4.2)
(ii) Math.abs(-4)

What is a parameterized constructor?

Write down java expression for:

`"T" = sqrt("A"^2 + "B"^2 + "C"^2)`

Rewrite the following using ternary operator:

if (x%2 == o)
System.out.print(“EVEN”);
else
System.out.print(“ODD”);

Convert the following while loop to the corresponding for loop: 

int m = 5, n = 10;
while (n >= 1)
{
System.out.println(m*n);
n--;
}

Write one difference between primitive data types and composite data types.

Analyze the given program segment and answer the following questions:

(i) Write the output of the program segment.
(ii) How many times does the body of the loop gets executed?

for (int m=5; m<=20;m+=5)
{   if(m%3==0)
   break;
else
if(m%5==0)
System.out.println(m);
continue;
}

Give the output of the following expression:
a+= a++ + ++a + -- a + a--; when a = 7;

Write the return type of the following library functions: 

1. isLetterOrDigit(char)
2. replace(char, char) 

Define a class named BookFair with the following description: 
Instance variables/Data members :

String Bname — stores the name of the book
double price — stores the price of the book Member methods :
(i) BookFair() — Default constructor to initialize data members
(ii) void Input() — To input and store the name and the price of the book.
(iii) void calculate() — To calculate the price after discount. Discount is calculated based on the following criteria.

(iv) void display() — To display the name and price of the book after discount. Write a main method to create an object of the class and call the above member methods.

Using the switch statement, write a menu-driven program for the following: 

(i) To print Floyd’s triangle [Given below]

1

2      3

4      5       6

7      8       9      10

11    12    13     14    15

(ii) To display the following pattern:

I

I     C

I     C      S

I     C      S     E

For an incorrect option, an appropriate error message should be displayed. 

Special words are those words that start and end with the same letter.
Examples:
EXISTENCE
COMIC
WINDOW
Palindrome words are those words which read the same from left to right and vice versa
Examples:
MALAYALAM
MADAM
LEVEL
ROTATOR
CIVIC
All palindromes are special words, but all special words are not palindromes. Write a program to accept a word check and print Whether the word is a palindrome or only a special word.

Design n class to overload a function SumSeriesO as follows: 

(i)

void SumSeries(int n, double x) – with one integer argument and one double argument to find and display the sum of the series given below:

`"s"  = "x"/1 - "x"/2 + "x"/3 - "x"/4 + "x"/5`...... ...... ...... to n terms

(ii)

void SumSeries() – To find and display the sum of the following series:
s = 1 + (1 x 2) + (1 x 2 x 3) + ….. + (1 x 2 x 3 x 4 x 20)

Write a program to accept a number and check and display whether it is a Niven number or not. 
(Niven number is that number which is divisible by its sum of digits).
Example:
Consider the number 126.
The Sum of its digits is 1+2+6 = 9 and 126 is divisible by 9.

Write a program to initialize the seven Wonders of the World along with their locations in two different arrays. Search for the name of the country input by the user. If found, display the name of the country along with its Wonder, otherwise display “Sorry Not Found!”. 
Seven wonders — CHICHEN ITZA, CHRIST THE REDEEMER, TAJMAHAL, GREAT WALL OF CHINA, MACHU PICCHU, PETRA, COLOSSEUM
Locations — MEXICO, BRAZIL, INDIA, CHINA, PERU, JORDAN, ITALY
Example —

Country Name: INDIA     Output: INDIA-TAJMAHAL
Country Name: USA        Output: Sorry Not Found!