(English Medium) ICSE Class 10 - CISCE Important Questions

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')

Write the value of n after execution:

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

When an object of a Wrapper class is converted to its corresponding primitive data type, it is called as ______.

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

Consider the above picture and choose the correct statement from the following:

Differentiate between boxing and unboxing.

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);

Define a class to accept a string and convert the same to uppercase, create and display the new string by replacing each vowel by immediate next character and every consonant by the previous character. The other characters remain the same.

Example: Input: #IMAGINATION@2024

                Output: #JLBFJMBSJPM@2024 

What is the difference between the linear search and the binary search technique?

Write the return data type of the following function: startsWith( )

Write the return data type of the following function: random( )

If the value of basic=1500, what will be the value of tax after the following statement is executed?

tax = basic > 1200 ? 200 : 100

Write a program to input 15 integer elements in an array and sort them in ascending order using the bubble sort technique. 

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

(a) void series (int x, int n) – To display the sum of the series given below:
x¹ + x² + x³ + ……………. xⁿ terms

(b) void series (int p) – To display the following series:
0, 7, 26, 63 p terms.

(c) void series () – To display the sum of the series given below:

`1/2 + 1/3 + 1/4 .....1/10`

Name the following :
(i) A keyword used to call a package in the program.
(ii) Any one reference data type.

What is the value of xl if x=5?
x1 = + +x – X+ + + –x