Section A
[Answer all Questions]
1. Do as directed
a) Give one
example each of a primitive data type and a composite data type.
b) Give one point
of difference between unary and binary operators.
2. Write a Java
statement to input / read the following from the user using the keyboard:
i) Character
ii) String
3. What will be
the output for the following program segment?
int a=0, b=30,
c=40;
a = --b + c++ +
b;
System.out.println("a="
+ a);
4. Write one word
answer for the following:
i) A method
that converts a string to a primitive integer data type
ii) The default
initial value of a boolean variable data type
5. Name the
primitive data type in Java that is:
(i) a 64-bit
integer and is used when you need a range of values wider than those provided
by int.
(ii) a single
16-bit Unicode character whose default value is ‘\u0000'
- Give the output
System.out.println("The King said \"Begin at the
beginning!\" to me.");
7. What are the
types of casting shown by the following examples:
(i) char c =
(char)120;
(ii) int x =
‘t’;
- Differentiate between if and switch statement
9. Give the output
of the following code segment when (i) opn = ‘b’ (ii) opn = ‘x’ (iii) opn =
‘a’.
switch(opn)
{
case 'a':
System.out.println("Platform
Independent");
break;
case 'b':
System.out.println("Object
Oriented");
case 'c':
System.out.println("Robust and
Secure");
break;
default:
System.out.println("Wrong
Input");
}
10. What is the
difference between break and continue statements when they occur in a loop.
11. What is an
infinite loop? Write an infinite loop statement.
12. Give the output
of the following program segment and also mention the number of times the loop
is executed:
int a,b;
for(a=6,b=4;a<=24;a=a+6)
{
if(a%b==0)
break;
}
System.out.println(a);
- Find and correct the errors in the following program segment:-
int n[] =
(2,4,6,8,10);
for(int i=0;
i<=5; i++)
System.out.println("n["
+ i + "] = " + n[i]);
14. Name the search
or sort algorithm that:
(i)
Makes several passes through the array, selecting the next
smallest item in the array each time and placing it where it belongs in the
array.
(ii) At each stage,
compares the sought key value with the key value of the middle element of the
array.
- What is a constructor? When is it invoked?
- State the difference between function and constructor.
- Enter any two values through constructor with parameters and write a program to swap and print the values.
18. What are the
two ways of invoking functions?
- Why do we need a constructor as a class member?
- Create a class with one integer instance variable. Initialize the variable using:
- default constructor
- parameterized constructor.
Section B
[Answer any five Questions]
1. An electronics
shop has announced the following seasonal discounts on the purchase of certain
items.
Purchase Amount
in Rs. Discount on Laptop Discount on Desktop PC
0-25000 0.0% 5.0%
25001 – 57000 5.0% 7.5%
57001 – 100000 7.5% 10.0%
More than
100000 10.0% 15.0%
Write a program
based on the above criteria, to input name, address, amount of purchase and the
type of purchase (L for Laptop and D for Desktop) by a customer. Compute and
print the net amount to be paid by a customer along with his name and address.
(Hint: discount
= (discount rate/100)* amount of purchase
Net amount =
amount of purchase – discount)
..
.. .. ..
2. Write a class
with the name volume using function overloading that computes the volume of a
cube, a sphere and a cuboid.
volume of a
cube (vc) = s*s*s
volume of a
sphere (vs) = 4/3*Π*r*r*r (where Π
= 3.14 or 22/7)
volume of a
cuboid (vcd) = l*b*h
3. The annual
examination results of 50 students in a class are tabulated as follows.
Roll no.
Subject A Subject B Subject C
Write a program
to read the data, calculate and display the following:
• Average marks obtained by each
student.
• Print the roll number and average
marks of the students whose average mark is above 80.
• Print the roll number and average
marks of the students whose average mark is below 40.
4. Define a class
called mobike with the following description:
Instance
variables/data members:
int bno – to
store the bike’s number
int phno – to
store the phone number of the customer
String name –
to store the name of the customer
int days – to
store the number of days the bike is taken on rent
int charge – to
calculate and store the rental charge
Member methods:
void input( ) –
to input and store the detail of the customer
void compute( )
– to compute the rental charge.
The rent for a
mobike is charged on the following basis:
First five days
`500 per day.
Next five days
`400 per day.
Rest of the
days `7200 per day.
void display( )
– to display the details in the following format:
Bike No. Phone
No. Name No. of days Charge
5. Using the
switch statement, write a menu driven program to:
• Generate and display the first 10
terms of the Fibonacci series
0, 1, 1, 2, 3,
5,
The first two
Fibonacci numbers are 0 and 1, and each subsequent number is the sum of the
previous two.
• To find the smallest digit of an
integer that is input:
Sample input:
6524
Sample output:
Smallest digit is 2
For an incorrect
choice, an appropriate error message should be displayed
6. Write a program
in to input and store all roll numbers, names and marks in 3 subjects of n
number of students in five single dimensional arrays and display the remark
based on average marks as given below
Average marks =
total marks/3
Average
marks
Remark
85 – 100
EXCELLENT
75 – 84 DISTINCTION
60 – 74
FIRST CLASS
40 – 59
PASS
Less than
40 POOR
7.
Design a class
to overload a function area( ) as follows:
•
double
area(double a, double b, double c) with three double arguments, returns the
area of a scalene triangle using the formula: area =
where s = 
•
double area(int
a, int b, int height) with three integer arguments, returns the area of a
trapezium using the formula: area = 
•
double
area(double diagonal1, double diagonal2) with two double arguments, returns the
area of a rhombus using the formula: area = 
To be Submitted by 3rd
July 2018
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