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

Define a class with the following specifications:

Class name: Bank

Member variables:

double p - stores the principal amount

double n - stores the time period in years

double r - stores the rate of interest

double a - stores the amount

member methods:

void accept () - input values for p and n using Scanner class methods only.

void calculate () - calculate the amount based on the following conditions:

`a = p (1+r/100)^n`

void display () - display the details in the given format.

Write the main method to create an object and call the above methods.

State a difference between call by value and call by reference. 

Missing a semicolon in a statement is what type of error?

The number of bits occupied by the value ‘a’ are:

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

The number of bytes occupied by a character array of four rows and three columns is ______.

Consider the following two-dimensional array and answer the questions given below:

int x[ ][] = {{4,3,2}, {7,8,2}, {8,3,10}, {1,2,9}};

1. What is the order of the array?
2. What is the value of x [0] [0] + x [2] [2]?

Differentiate between boxing and unboxing.

Primitive data types are built in data types which are a part of the wrapper classes. These wrapper classes are encapsulated in the java.lang package. Non primitive datatypes like Scanner class are a part of the utility package for which an object needs to be created.

1. To which package the Character and Boolean classes belong?
2. Write the statement to access the Scanner class in the program.

The statement that brings the control back to the calling method is ______.

Consider the following program segment and answer the questions given below:

int x[][]={{2,4,5,6}, {5,7,8,1}, {34,2,10,9}};

1. What is the position of 34?
2. What is the result of x[2][3] + x[1][2]?

Define a class to accept values into a 4 × 4 array and find and display the sum of each row.

Example:

A[][]={1,2,3,4),{5,6,7,8},{1,3,5,7},{2,5,3,1}}

Output:

sum of row 1=10 (1+2+3+4)

sum of row 2=26 (5+6+7+8)

sum of row 3=16 (1+3+5+7)

sum of row 4=11 (2+5+3+1)

What are the two ways of invoking functions?

Differentiate between formal parameter and actual parameter. 

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

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.

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

Method which is a part of a class rather than an instance of the class is termed as ______.

Invoking a method by passing the objects of a class is termed as ______.

Assertion (A): Static method can access static and instance variables.

Reason (R): Static variables can be accessed only by static method.