(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Computer Applications

Convert the following while loop to the corresponding for loop: 

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

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

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

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) 

Evaluate the value of n. if value of p = 5, q = 19  
int n = (q – p) > (p – q) ? (q – p) : (p – q) 

Arrange the following primitive-data types in ascending order of their size:
(i) char (ii) byte (iii) double (iv) int

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; 

What are the values of a and b after the following function is executed if the values passed are 30 and 50?

void paws(int a, int b) 
{ a = a + b; 
  b = a - b; 
  a = a - b;' 
System.out.println(a + "," + b); 
} 

State the data type and value of y after the following is executed: char x = 7; y = Character.isLetter(x); 

Give the output of the following :

(i) Math.floor (- 4.7)

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

Name the mathematical function which is used to find sine of an angle given in radians.

Name a string function which removes the blank spaces provided in the prefix and suffix of a string. 

Give the output of the following string functions: 

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

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. 

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 two separate programs to generate the following patterns using iteration (loop) statement:

(a)