ICSE COMPUTER APPLICATION PRACTICE PAPER 6

Class – X

Subject –  Computer Application

Time: 2hrs                                                                                                      Marks: 100mks

Answer to this paper must be 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. Time given at the head of this paper is the time allowed for writing the answers. This paper is divided in 2 sections. Attempt all questions of section A and any 4 questions of section B. The intended marks for questions or part of questions are given in square brackets [ ]. In programs give appropriate variable names and comments wherever necessary.

                                                            Section A

Question 1:

                                                                                                                                  

1. Write 2 advantages of arrays.                                                                                 [2]

2. Give the difference between length() and length along with the example.            [2]

3. Give the use of return typr and argument type of the function of CompareTo( ). [2]

4. Write a note of explicit conversion.                                                                        [2]

5. Write a note on parameterized constructor.                                                            [2]

 

Question 2:

1. Distinguish between linear and binary search.                                                        [3]

2. Give use of dot operator with example.                                                                 [2]

3. Give the syntax for arrayCopy( ).                                                                           [1]

4. Write a function prototype for function calculate which accepts a word wrd and a character chr and returns no value.                                                                                                   [2]

5. Explain the syntax of while loop.                                                                           [2]

  

Question 3:

1. Convert the following for loop in to do-while loop:                                              [2]

for(int i=10,j=0;j<=10;i++,j=j+3)

System.out.print(i+"  "+j);      

2. Write scope and lifetime for a argument variable.                                                  [2]

3. Write a note on call by reference.                                                                           [2]

4. Write a java expression for the following.                                                              [2]

                                                                                                                                   

i.       

ii.     

 

5. Give the output for the following                                                                           [4]

             String s="Global", st="citizen";

i. System.out.print(st.compareTo(s));

ii. System.out.print((s+st).length());

iii. System.out.print(s+st.substring(0,4));

iv. System.out.print(s.length()+st);

6. Determine how many times the loop will execute and give the output                  [2]

for(int i=2;i<=20;i=i+2)

{   

if(i%2==0)

    continue;

System.out.print(i);

}

7. Solve the following expression.                                                                              [1]

 int a,b=30,c=40;

a=b+c++ +b+c;

8. Correct the error                                                                                                      [2]

int n[ ]=(2,4,6,8,10)

for(int i=0;i<=5;i++)

{

            System.out.print("n["+I+"]="n[1]);

            }

9. Name the keywords that                                                                                         [2]

            i. Informs that an error has occurred in input and output operations.

            ii. Distinguishes between instance and class variable.

10. Define scanner class.                                                                                             [1]

Section B [Any 4]

Question 4:                                                                                                                 [15]

Write a program to reverse the given string.

e.g.

enter string::(input a space at the end)

Brown fox is mad

 nworB  xof  si  dam

Question 5:                                                                                                                 [15]

Write a program that stores a list of countries & % of people owning P.C as below

                

 Country                         % people owning P.C

                India                                           78.2

                Japan                                          36.7

                USA                                           89.7

                Germany                                   42.3

                Singapore                                 47.8

                U.K                                          37.8

Use the above data & bubble sorting technique to print the list in decreasing order of its % people owning P.C.

Question 6:                                                                                                                 [15]

Write a program to accept a number and reverse it and check whether given number is palindrome or not.

Question 7:                                                                                                                 [15]

 Midland bank offers the following rates of interest for the fixed deposits made by the customers.

          Time                                             Rate

  Upto 6 mnts                                          7%

  Above 6mnts & upto 12mnts                8%

  Above 12mnts & upto 36mnts              9%

  Above 36mnts                                      10%

The amount after 'm' months is calculated by using the formula:

              A = P * (1 + R/100)^m

Using switch case, write a menu driven program to allow customers to deposit the sum for a period of time.

Question 8:                                                                                                                 [15]

Define a class student as described below

        Data members:

                             Name, age, mks1, mks2, mks3 (marks in 3 subjects), maximum, average.

        Member methods:

i.          A parameterized constructor to initialize the data members

ii.         To accept the details of the students

iii.        To compute the average & max out of 3 marks

iv.        To display the name, age, marks in 3 subjects, maximum & average

Write a main method to create object of the class & call all the above member methods.

Question 9:                                                                                                                             [15]

 Write a program to print the pattern as :

           aaaaaaaaa

                                    aaaaaaa

                                      aaaaa

                                        aaa

                                         a

                                       aaa

                                     aaaaa

                                   aaaaaaa

         aaaaaaaaa