Computer Applications — Suggested Paper 2

1(i). int x = (int)32.8; is an example of __________ typecasting.

1(ii). Choose the odd one:

1(iii). Return data type of isLetter(char) is __________.

1(iv). Fill in blank (v): void __________

1(v). The output of the function "COMPOSITION".substring(3, 6):

1(vi). The blueprint that defines the variables and the methods common to all of a certain kind is termed as:

1(vii). Assertion (A): Static method can access static and instance variables. Reason (R): Static variables can be accessed only by static method.

1(viii). The index (subscript) of the last element of an array ar[] is

1(ix). The concept of having more than one constructor with different types of parameters:

1(x). Multi line comments in Java start with /* and end with */.

1(xi). State the type of loop in the given program segment: for(int i = 5; i != 0; i -= 2) System.out.println(i);

1(xii). Corresponding wrapper class of float data type is __________.

1(xiii). In a calculator which Java feature allows multiple methods named calculate() for the different operations?

1(xiv). Assertion (A): The substring() method modifies the original String. Reason (R): The substring() method can extract part of a String starting from a specific index.

1(xv). Choose the odd one:

1(xvi). Which of the following is NOT an access specifier?

1(xvii). The number of bytes occupied by a character array of four rows and three columns is __________.

1(xviii). If the name of the class is "Yellow", what can be the possible name for its constructors?

1(xix). Assertion (A): The result of the Java expression 3 + 7/2 is 6. Reason (R): According to the hierarchy of operators in Java, addition is done first followed by division.

1(xx). Which of the following are entry-controlled loops? 1. for 2. while 3. do..while 4. switch

2(i). System.out.print("BEST "); System.out.println("OF LUCK"); Choose the correct option for the output of the above statements: (i) BEST OF LUCK (ii) BEST OF LUCK

2(ii). Write the return data type of the following functions: (i) endsWith() (ii) log()

2(iii). Rewrite the following using ternary operator: if(x % 2 == 0) System.out.print("EVEN"); else System.out.print("ODD");

2(iv). Give the output of the following string functions: (i) "ACHIEVEMENT".replace('E', 'A') (ii) "DEDICATE".compareTo("DEVOTEE")

2(v). Differentiate between constructor and function.

2(vi). How are private members of a class different from public members?

2(vii). John was asked to write a Java code to calculate the surface area of a cone. The following code was written by him: Surface area of cone is A = pi * r * l, where l = sqrt(r^2 + h^2) class area { double area(double r, double h) { double l, a; a = 22.0 / 7 * r * l; l = Math.sqrt(r * r + h * h); return a; } } Specify the type of the error in the above program, correct and write the program to be error free.

2(viii). Consider the following array and answer the questions given below: int a[] = {12, 10, 8, 4, 6, 2, 3, 5, 7}; (a) What is the output of System.out.print(a[0] + a[5]);? (b) What is the index (subscript) of the largest element of the array a[]?

2(ix). Name any two basic principles of object-oriented programming.

2(x). Identify and name the following tokens: (i) public (ii) 'a' (iii) == (iv) { }

3. Define a class to accept a String and print the number of digits, alphabets and special characters in the string. Example: S = "KAPILDEV@83" Output: Number of digits - 2 Number of Alphabets - 8 Number of Special characters - 1

4. Write a program to accept a number and check and display whether it is a spy number or not. A number is spy if the sum of its digits equals the product of its digits. Example: consider the number 1124. Sum of the digits = 1 + 1 + 2 + 4 = 8 Product of the digits = 1 x 1 x 2 x 4 = 8

5. Design a class to overload a function sumSeries() 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: x/1 + x/2 + x/3 + ... + x/n (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 ... x 20)

6. Define a class pin code and store the given pin codes in a single-dimensional array. Sort these pin codes in ascending order using the Selection Sort technique only. Display the sorted array. 110061, 110001, 110029, 110023, 110055, 110006, 110019, 110033

7. Design a class with the following specifications: Class name: Student Member variables: name - name of student age - age of student mks - marks obtained stream - stream allocated (Declare the variables using appropriate data types) Member methods: void accept() - Accept name, age and marks using methods of Scanner class. void allocation() - Allocate the stream as per the following criteria: mks stream >= 300 Science and Computer >= 200 and < 300 Commerce and Computer >= 75 and < 200 Arts and Animation < 75 Try Again void print() - Display Student name, age, mks and stream allocated. Call all the above methods in main method using an object.

8. Design a class ShowRoom with the following description: Instance variables / data members: String name - to store the name of the customer long mobNo - to store the mobile number of the customer double cost - to store the cost of the items purchased double dis - to store the discount amount double amount - to store the amount to be paid after discount Member methods: ShowRoom() - default constructor to initialize data members void input() - to input customer name, mobile number, cost void calculate()- to calculate discount on the cost of purchased items, based on the following criteria: Cost Discount (%) Less than or equal to Rs. 10000 5% More than 10000 and up to 20000 10% More than 20000 and up to 35000 15% More than 35000 20% void display() - to display customer name, mobile number, amount to be paid after discount Write a main() method to create an object of the class and call the above member methods.