Computer Applications Set 1 2017-2018 (English Medium) ICSE Class 10 Question Paper Solution

 Define abstraction.

Differentiate between searching and sorting.

Write a difference between the functions isUpperCase() and toUpperCase().

How are private members of a class different from public members?

Classify the following as primitive or non-primitive data type:

char 

Classify the following as primitive or non-primitive data type.

arrays

Classify the following as primitive or non-primitive data type.

int

Classify the following as primitive or non-primitive data type.

classes

int res = ‘A’; 

What is the value of res?

Name the package that contains wrapper classes. 

State the difference between while and do-while loop.

System.out.print("BEST "); 
System.out.println("OF LUCK"); 

Choose the correct option for the output of the above statements. 

BEST OF LUCK

BEST
OF LUCK

Write the prototype of a function check which takes an integer as an argument and returns a character.

Write the return data type of the following function:

endsWith( )

Write the return data type of the following function:

log( )

Write a Java expression for the following :

`sqrt(3"x"+"x"^2)/"a+b"`

What is the value of y after evaluating the expression given below?

y+= ++y + y-- + --y; when int y=8; 

Give the output of the following :

(i) Math.floor (- 4.7)

(ii) Math.ceil(3.4) + Math.pow(2,3)

Write two characteristics of a constructor.

Write the output for the following :

System.out.printIn(“Incredible” + “\n” + “world”);

Convert the following if else if construct into switch case 

if (var= = 1)

System.out .println(“good”);

else if(var= =2)

System.out.prindn(“better”);

else if(var= =3)

System.out.prindn( “best”);

else

System.out.prindn(“invalid”);

Give the output of the following string functions: 

1. “ACHIEVEMENT”.replace(E’, ‘A’)
2. “DEDICATE”.compareTo(“DEVOTE”)

Consider the following String array and give the output 

String arr[]= {“DELHI”, “CHENNAI”, “MUMBAI”, “LUCKNOW”, “JAIPUR”};

System.out.println(arr[0] .length( )> arr[3] .length( );

System.out.print(arr[4] ,substring(0,3));

Rewrite the following using ternary operator : 

if (bill > 10000)
discount = bill * 10.0 / 100;
else
discount = bill * 5.0 / 100;

Give the output of the following program segment and also mention how many times the loop is executed : 

int i; 
for (i = 5; i > 10; i++) 
System.out.println(i); 
System.out.println(i * 4);

Design a class Railway Ticket with following description: 
Instance variables/data members:
String name: To store the name of the customer
String coach: To store the type of coach customer wants to travel
long mob no: To store customer’s mobile number
int amt: To store a basic amount of ticket
int total amt: To store the amount to be paid after updating the original amount

Member methods
void accept (): To take input for a name, coach, mobile number and amount
void update (): To update the amount as per the coach selected

(extra amount to be added in the amount as follows)

void display(): To display all details of a customer such as a name, coach, total amount and mobile number.

Write a main method to create an object of the class and call the above member methods. 

Write a program to input a number and check and print whether it is a Pronic number or not. (Pronic number is the number which is the product of two consecutive integers).

Examples: 12 = 3 × 4 
20 = 4 × 5
42 = 6 × 7

Write a program in Java to accept a string in lower case and change the first letter of every word to upper case. Display the new string. 

Sample input: we are in a cyber world

Sample output: We Are In Cyber World

Design a class to overload a function volume() as follows: 

1. double volume (double R): with radius (R) as an argument, returns the volume of a sphere using the formula.
   V = 4/3 × 22/7 × R³
2. double volume (double H, double R): with height(H) and radius(R) as the arguments, returns the volume of a cylinder using the formula.
   V = 22/7 × R² × H
3. double volume (double L, double B, double H): with length(L), breadth(B) and Height(H) as the arguments, returns the volume of a cuboid using the formula.

Write a menu-driven program to display the pattern as per the user’s choice. 

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

Write a program to accept a name and total marks of N number of students in two single subscript array name[] and totalmarks[].

Calculate and print:

1. The average of the total marks obtained by N Number of students.
   [average = (sum of total marks of all the students)/N]
2. Deviation of each student’s total marks with the average
   [deviation = total marks of a student – average]