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

Design a class to overload a function area( ) as follows:
(i) double area (double a, double b, double c) with three double arguments, returns the area of a scalene triangle using the formula:

area = `sqrt ("s" ("s" - "a")("s" - "b")("s" - "c"))  "2ab"`

where `"s" = ("a" + "b" + "c")/2`

(ii) double area (int a, int b, int height) with three integer arguments, returns the area of a trapezium using the formula:

area = `1/2` height (a+b)

(iii) double area (double diagonal 1, double diagonal 2) with two double arguments, returns the area of a rhombus using the formula :

area = `1/2` (diagonal 1 × diagonal 2)

Give the output of the following code.

String A = "26.0", B= "74.0";

double C = Double.parseDouble(A);

double D = Double.parseDouble(B);

System.out.println((C+D));

A mechanism where one class acquires the properties of another class:

Predict the output of the following code snippet: String P = "20", Q = "22";

int a = Integer.parseInt(P);

int b = Integer.value0f(Q);

System.out.println(a + " " + b);

Give the output of the following Character class method:

Character.toUpperCase('a')

Give the output of the following Character class

method:Character.isLetterOrDigit('W')

Consider the given array and answer the question given below:

int x[ ] {4; 7,9,66,72,0,16);

What is the length of the array?

Consider the given array and answer the question given below:

int x[ ] {4; 7,9,66,72,0,16);

What is the value in x[4]?

Write the value of n after execution:

char ch = 'd';
int n = ch+5;

Define a class to accept 10 characters from a user. Using bubble sort technique arrange them in ascending order. Display the sorted array and original array.

Define a class to accept values into an array of double data type of size 20. Accept a double value from user and search in the array using linear search method. If value is found display message "Found" with its potiition where it is present in the array. Otherwise display message "not found".

Which of the following is an escape sequence character in Java?

What is the method to check whether a character is a letter or digit?

What is the output of the Java code given below?

String color [ J = {"Blue", "Red", "Violet"}; System.out.println(color[2].length();

Rewrite the following do while program segment using for:

x = 10; y = 20;
do
{
   x++;
   y++;
}while (x<=20);
System.out.println(x*y);

Consider the given program and answer the questions given below:

class temp
      {
      int a;
      temp()
      {
      a=10
      }
      temp(int z)
      a=z;
      }
      void print()
      {
      System.out.println(a);
      }
      void main()
      {
      temp t = new temp();
      temp x = new temp(30);
      t.print();
      x.print();
      }
      }
  

1. What concept of OOPs is depicted in the above program with two constructors?
2. What is the output of the method main()?

The size of '\n' is ______.

The method to convert a lowercase character to uppercase is ______.

Predict the output of the following code snippet:

char ch='B';
char chr=Character.toLowerCase(ch);
int n=(int)chr-10;
System.out.println((char)n+"\t"+chr);

A student is trying to convert the string present in x to a numerical value, so that he can find the square root of the converted value, However the code has an error. Name the error (syntax/logical/runtime). Correct the code so that it compiles and runs correctly.

String x="25";
int y=Double.parseDouble(x);
double r=Math.sqrt(y);
System.out.println(r);