(English Medium) ICSE Class 10 - CISCE Important Questions

Differentiate between searching and sorting.

If int x [ ] = { 4, 3,7, 8, 9,10}; what are the values of p and q ?

(i) p = x.length
(ii) q = x[2] + x[5] * x[1]

What is the type of casting shown by the following example: 

char c = (char) 120;

Write a program to input integer elements into an array of size 20 and perform the following operations:

(i) Display largest number from the array.
(ii) Display smallest number’ from the array.
(iii) Display sum of all the elements of the array.

Write a program to input forty words in an array. Arrange these words in descending order of alphabets, using selection sort technique. Print the sorted array.

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

What is the value stored in variable res given below?

double res = Math.pow (“345”.indexOf(‘5’), 3);

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); 

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] 

Using the switch statement, write a menu driven program to:
(i) To find and display all the factors of a number input by the user (including 1 and excluding number itself).

Example:
Sample Input: n=15
Sample Output: 1, 3, 5.
(ii) To find and display the factorial of a number input by the user (the factorial of a non-negative integer n, denoted by n\ is the product of all integers less than or equal to n.
Example:
Sample Input: n=5
Sample Output: 5! = 1×2×3×4×5 = 120.
For an incorrect choice, an appropriate error message should be displayed.

Find the errors in the given program segment and re-write the statements correctly to assign values to an integer array.
int a = new int (5);
for (int i = 0; i < = 5; i++) a [i] = i;

State the value of y after the following is executed:

char x = '7';

y = Character.isLetter(x);

Identify the correct array declaration statement.

Define a class to declare an integer array of size n and accept the elements into the array. Search for an element input by the user using the linear search technique, display the element if it is found, otherwise display the message “NO SUCH ELEMENT".

Define a class to declare a character array of size ten, accept the character into the array and perform the following:

• Count the number of uppercase letters in the array and print.
• Count the number of vowels in the array and print.

Define a class to declare an array of size 20 of the double datatype, accept the elements into the array and perform the following:

• Calculate and print the sum of all the elements.
• Calculate and print the highest value of the array.

int x = (int) 32.8; is an example of ______ typecasting.