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Question Bank Solutions for ICSE Class 10 - CISCE - Computer Applications

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Computer Applications
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Name any two basic principles of Object-oriented Programming.

[0.01] Revision of Class Ix Syllabus
Chapter: [0.01] Revision of Class Ix Syllabus
Concept: Introduction of Object-oriented Programming

Name the keyword which: indicates that a method has no return type.

[0.02] Class as the Basis of All Computation
Chapter: [0.02] Class as the Basis of All Computation
Concept: Concept of Objects

Name the keyword which: makes the variable as a class variable.

[0.02] Class as the Basis of All Computation
Chapter: [0.02] Class as the Basis of All Computation
Concept: Concept of Objects

Identify and name the following tokens:

(i) public
(ii) ‘a’
(iii) ==
(iv) {}

[0.06] Encapsulation
Chapter: [0.06] Encapsulation
Concept: Access Specifiers (Access Modifiers)

Evaluate the following expression if the value of x = 2,y = 3 and z = 1.
v = x + – z + y + + + y.

[0.02] Class as the Basis of All Computation
Chapter: [0.02] Class as the Basis of All Computation
Concept: Concept of Objects

Design a class name ShowRoom with the following description :
Instance variables/ Data members :

String name – To store the name of the customer
long mobno – To store the mobile number of the customer
double cost – To store the cost of the items purchased
double dis – To store the discount amount
double amount – To store the amount to be paid after discount
Member methods: –
ShowRoom() – default constructor to initialize data members
void input() – To input customer name, mobile number, cost
void calculate() – To calculate discount on the cost of purchased items, based on following criteria

Cost Discount (in percentage)
Less than or equal to ₹ 10000 5%
More than ₹ 10000 and less than or equal to ₹ 20000 10%
More than ₹ 20000 and less than or equal to ₹ 35000 15%
More than ₹ 35000 20%

void display() – To display customer name, mobile number, amount to be paid after discount
Write a main method to create an object of the class and call the above member methods.

[0.08] String Handling
Chapter: [0.08] String Handling
Concept: Concept of String Class

Name any two OOP’s principles.

[0.01] Revision of Class Ix Syllabus
Chapter: [0.01] Revision of Class Ix Syllabus
Concept: Introduction of Object-oriented Programming

What are identifiers?

[0.01] Revision of Class Ix Syllabus
Chapter: [0.01] Revision of Class Ix Syllabus
Concept: Introduction of Object-oriented Programming

What are keywords ? Give an example.

[0.01] Revision of Class Ix Syllabus
Chapter: [0.01] Revision of Class Ix Syllabus
Concept: Introduction of Object-oriented Programming

 Define abstraction.

[0.05] Library Classes
Chapter: [0.05] Library Classes
Concept: Introduction to Wrapper Classes

Name the type of error ( syntax, runtime or logical error) in each case given below: 

(i) Math.sqrt (36 – 45)
(ii) int a;b;c;

[0.01] Revision of Class Ix Syllabus
Chapter: [0.01] Revision of Class Ix Syllabus
Concept: Introduction of Object-oriented Programming

What is the difference between the Scanner class functions next () and nextLine()?

[0.02] Class as the Basis of All Computation
Chapter: [0.02] Class as the Basis of All Computation
Concept: Concept of Objects

Write a function prototype of the following: 

A function PosChar which takes a string argument and a character argument and returns an integer value.

[0.01] Revision of Class Ix Syllabus
Chapter: [0.01] Revision of Class Ix Syllabus
Concept: Introduction of Object-oriented Programming

Name any two types of access specifiers.

[0.06] Encapsulation
Chapter: [0.06] Encapsulation
Concept: Access Specifiers (Access Modifiers)

Give the output of the following string functions:

(i) "MISSISSIPPI".indexOf('S') + "MISSISSIPPI".lastIndexOf('I')

(ii) "CABLE".compareTo("CADET")

[0.08] String Handling
Chapter: [0.08] String Handling
Concept: Concept of String Class

System.out.print(“BEST”); 

System.out.println(“OF LUCK”);

Choose the correct option for the output of the above statements

[0.02] Class as the Basis of All Computation
Chapter: [0.02] Class as the Basis of All Computation
Concept: Concept of Objects

Give the output of the following expression:
a+= a++ + ++a + – – a + a – – ; when a = 7

[0.01] Revision of Class Ix Syllabus
Chapter: [0.01] Revision of Class Ix Syllabus
Concept: Introduction of Object-oriented Programming

Give the output of the following string functions : 

(i) “ACHIEVEMENT” .replace(E’, ‘A’)

(ii) “DEDICATE”. compareTo(“DEVOTE”)

[0.08] String Handling
Chapter: [0.08] String Handling
Concept: Concept of String Class

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.

[0.01] Revision of Class Ix Syllabus
Chapter: [0.01] Revision of Class Ix Syllabus
Concept: Introduction of Object-oriented Programming

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)

Type of Coaches Amount
First_ AC 700
Second_AC 500
Third _AC 250
sleeper None

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.

[0.08] String Handling
Chapter: [0.08] String Handling
Concept: Concept of String Class
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