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ICSE Computer Application 2016 Paper Solved Previous Year
General Instructions :
- Answers to this Paper must he written on the paper provided separately.
- You will not be allowed to write during the first 15 minutes.
- This time is to be spent in reading the Question Paper.
- The time given at the head of this Paper is the time allowed for writing the answers.
- This Paper is divided into two Sections.
- Attempt all questions from Section A and any four questions from Section B.
- The intended marks for questions or parts of questions are given in brackets [ ].
Section-A [40 Marks]
Question 1.
(a) Define Encapsulation. [2]
(b) What are keywords ? Give an example. [2]
(c) Name any two library packages. [2]
(d) Name the type of error ( syntax, runtime or logical error) in each case given below: [2]
(i) Math.sqrt (36 – 45)
(ii) int a;b;c;
(e) If int x [ ] = { 4, 3,7, 8, 9,10}; what are the values of p and q ? [2]
(i) p = x.length
(ii) q = x[2] + x[5] * x[1]
Answer:
(a) Encapsulation: It is process of wrapping code and data together into a single unit (called class).
(b) Keywords: Keywords are reserved words in Java, which have a special meaning in the language.
Example: if, void, int etc.
(c) (i) java.io
(ii) java.util
(d) (i) logical error
(ii) syntax error
(e) (i) Value of P will be 6.
(ii) q = x[2] + x[5] * x[1]
= 7 + 10 * 3
= 7 + 30 = 37
value of q is 37.
Question 2:
(a) State the difference between == operator and equals ( ) method. [2]
(b) What are the types of casting shown by the following examples: [2]
(i) char c = (char) 120;
(ii) int x = ‘t’;
(c) Differentiate between formal parameter and actual parameter. [2]
(d) Write a function prototype of the following: [2]
A function PosChar which takes a string argument and a character argument and returns an integer value.
(e) Name any two types of access specifiers. [2]
Answer:
(a)
= = operator | equals ( ) method |
It is a relational operator. | It is a method of string class. |
It checks for equality of primitive type of values. | It checks for equality of two string type of values. |
(b) (i) Explicit type conversion,
(ii) Implicit type conversion.
(c)
Formal parameter | Actual parameter |
They are variables define in function signature. | They are values given to the function at the time of function call. |
They receive value from actual parameter. | They give values to formal parameter. |
(d) int PosChar (String str, char ch)
(e) Two types of access specifiers:
1. public
2. . private
Question 3:
(a) Give the output of the following string functions: [2]
(i) “MISSISSIPPI”.indexOf(‘S’) + “MISSISSIPPF”.lastIndexOf(‘I’)
(ii) “CABLE”.compareTo(“CADET”)
(b) Give the output of the following Math functions: [2]
(i) Math.ceil(4.2)
(ii) Math.abs(-4)
(c) What is a parameterized constructor ? [2]
(d) Write down java expression for: [2]
(e) Rewrite the following using ternary operator: [2]
if (x%2 == o)
System.out.print(“EVEN”);
else
System.out.print(“ODD”);
(f) Convert the following while loop to the corresponding for loop: [2]
int m = 5, n = 10;
while (n>=1)
{
System.out.println(m*n);
n-;
}
(g) Write one difference between primitive data types and composite data types. [2]
(h) Analyze the given program segment and answer the following questions: [2]
(i) Write the output of the program segment.
(ii) How many times does the body of the loop gets executed ?
(i) Give the output of the following expression: [2]
a+= a++ + ++a + – – a + a – – ; when a = 7
(j) Write the return type of the following library functions: [2]
(i) isLetterOrDigit(char)
(ii) replace(char, char)
Answer:
(a) (i) 2 + 10 = 12
(ii) -3
(b) (i) 5.0
(ii) 4
(c) Parameterized Constructor: It is a constructor which accepts parameters. When an object is declared using parameterized constructor, the initial values have to be passed as arguments to the constructor.
(d) T = Math.sqrt (A*A + B*B + C*C);
(e) String k;
k = x%2 == 0 ? “EVEN” : “ODD”;
System.out.print(k);
(f) for (int m=5, n=10; n>=1; n – – )
{
System.out.println (m*n);
}
(g)
Primitive data types | Composite data types |
They are predefined/inbuilt data types. | These data types are defined by user and made-up of primitive data type values. |
Examples : int, byte, long, short, char, float, double, boolean. | Examples : Array, class, interface. |
(h) (i) Output:
5
10
(ii) 3 times
(i) a = a+ a++ + ++a + – – a + a – – ;
= 7 + 7 + 9 + 8 + 8 = 39
(j) (i) boolean (ii) String
Section B (60 Marks)
Attempt any four questions from this Section.
The answers in this Section should consist of the Programs in either Blue J , environment or any program environment with Java as the base.
Each program should be written using Variable descriptions I Mnemonic Codes so that the logic of the program is clearly depicted.
Flow-Charts and Algorithms are not required.
Question 4:
Define a class named BookFair with the following description: [15]
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.
Price | Discount |
Less than or equal to Rs. 1000 | 2% of price |
More than Rs. 1000 and less than or equal to Rs. 3000 | 10% of price |
More than % 3000 | 15% of price |
(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.
Answer:
Question 5:
Using the switch statement, write a menu driven program for the following: [15]
(i) To print the 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.
Answer:
Question 6:
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 special word.
Answer:
Question 7:
Design n class to overload a function SumSeriesO as follows: [15]
(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:
(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)
Answer:
Question 8:
Write a program to accept a number and check and display whether it is a Niven number or not. [15]
(Niven number is that number which is divisible by its sum of digits).
Example:
Consider the number 126.
Sum of its digits is 1+2+6 = 9 and 126 is divisible by 9.
Answer:
Question 9:
Write a program to initialize the seven Wonders of the World along with their locations in two different arrays. Search for a 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!”. [15]
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!
Answer:
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