Project Work
Class –9
Computer Applications
1 Mr. Agarwal invests certain sum at 5% per annum compound
interest for three years. Write a program in Java to calculate:
(a) the interest for the first year
(b) the interest for the second year
(c) the amount after three years.
Take sum as an input from the user.
Sample Input: Principal = ₹5000, Rate =10%, Time = 3 yrs
Sample Output: Interest for the first year: ₹500
Interest for the second year: ₹550
Interest for the third year: ₹605
2. A businessman wishes to accumulate 3000 shares of a
company. However, he already has some shares of that company
valuing ₹10 (nominal value) which yield 10% dividend per annum
and receive ₹2000 as dividend at the end of the year. Write a
program in Java to calculate the number of shares he has and
how many more shares to be purchased to make his target.
Hint: No. of share = (Annual dividend * 100) / (Nominal value *
div%)
3. A Pre-Paid taxi charges from the passenger as per the tariff
given below:
Distance Rate
Up to 5 km ₹ 100
Distance Rate
For the next 10 km ₹ 10/km
For the next 10 km ₹ 8/km
More than 25 km ₹ 5/km
Write a program to input the distance covered and calculate the
amount paid by the passenger. The program displays the printed
bill with the details given below:
Taxi No. :
Distance covered :
Amount :
4. Given below is a hypothetical table showing rate of income tax
for an India citizen, who is below or up to 60 years.
Taxable income (TI) in ₹ Income Ta
Up to ₹ 2,50,000 Nil
More than ₹ 2,50,000 and less than or equal to ₹
(TI - 1,60,000) * 10
5,00,000
More than ₹ 5,00,000 and less than or equal to ₹ (TI - 5,00,000) * 20
10,00,000 34,000
(TI - 10,00,000) * 3
More than ₹ 10,00,000
94,000
Write a program to input the name, age and taxable income of a
person. If the age is more than 60 years then display the message
"Wrong Category". If the age is less than or equal to 60 years then
compute and display the income tax payable along with the name
of tax payer, as per the table given above.
5. The volume of solids, viz. cuboid, cylinder and cone can be
calculated by the formula:
1. Volume of a cuboid (v = l*b*h)
2. Volume of a cylinder (v = π*r2*h)
3. Volume of a cone (v = (1/3)*π*r2*h)
Using a switch case statement, write a program to find the
volume of different solids by taking suitable variables and data
types.
6. A Mega Shop has different floors which display varieties of
dresses as mentioned
below:
1. Ground floor : Kids Wear
2. First floor : Ladies Wear
3. Second floor : Designer Sarees
4. Third Floor : Men's Wear
The user enters floor number and gets the information regarding
different items of the Mega shop. After shopping, the customer
pays the amount at the billing counter and the shopkeeper prints
the bill in the given format:
Name of the Shop: City Mart
Total Amount:
Visit Again!!
Write a program to perform the above task as per the user's
choice.
7. Write a program using switch case to display different seasons
in a year
8. 'Kumar Electronics' has announced the following seasonal
discounts on purchase of certain items.
Purchase Amount Discount on Laptop Discount on De
Up to ₹ 25000 0.0% 5.0%
₹ 25,001 to ₹ 50,000 5% 7.5%
₹ 50,001 to ₹ 1,00,000 7.5% 10.0%
More than ₹ 1,00,000 10.0% 15.0%
Write a program to input name, 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.
(Net amount = Amount of purchase - discount)
9. Write a program to enter any 50 numbers and check whether
they are divisible by 5 or not. If divisible then perform the
following tasks:
(a) Display all the numbers ending with the digit 9.
(b) Count those numbers ending with 0 (zero).
10. Write a program to display the sum of the following series
a) S = 1/a + 1/a2 + 1/a3 + ...... + 1/an
b) S = x/2 + x/5 + x/8 + x/11 + ...... + x/200
11) Write a program to input Principal (p), Rate (r) and Time (t).
Calculate and display the amount, which is compounded annually
for each year by using the formula:
Simple Interest (si) = (prt) / 100
p = p + si
[Hint: The amount after each year is the Principal for the next
year]
12) Write a menu driven class to accept a number from the user
and check whether it is a Palindrome or a Perfect number.
(a) Palindrome number: (A number is a Palindrome which when
read in reverse order is same as in the right order)
Example: 11, 101, 151 etc.
(b) Perfect number: (A number is called Perfect if it is equal to the
sum of its factors other than the number itself.)
Example: 6 = 1 + 2 + 3
13) Write a program to input a number. Check and display
whether it is a Niven number or not. (A number is said to be
Niven which is divisible by the sum of its digits).
Example: Sample Input 126
Sum of its digits = 1 + 2 + 6 = 9 and 126 is divisible by 9.
14) Write a program to accept a number and check whether it is a
'Spy Number' or not. (A number is spy if the sum of its digits
equals the product of its digits.)
Example: Sample Input: 1124
Sum of the digits = 1 + 1 + 2 + 4 = 8
Product of the digits = 1*1*2*4 = 8
15) Write a program to calculate and display the factorials of all
the numbers between 'm' and 'n' (where m<n, m>0, n>0).
[Hint: factorial of 5 means: 5!=5*4*3*2*1]
16) Write a program to input a number and perform the following
tasks:
(a) to check whether it is a prime number or not
(b) to reverse the number
If the number as well as the reverse is also 'Prime' then display
'Twisted Prime' otherwise 'Not a twisted Prime'.
Sample Input: 167
Sample Output: 167 and 761 both are prime.
It is a 'Twisted Prime'.
17) Write the programs in Java to display the following patterns:
(a)
1
21
321
4321
54321
b) 1 2 3 4 5
1234
123
12
1
18) Write the programs in Java to display the following pattern:
13579
1357
135
13
1
19) Write the programs in Java to display the following pattern:
9
79
579
3579
13579
20) Write the programs in Java to display the following pattern:
1
23
456
7 8 9 10
11 12 13 14 15
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