Filters

CBSE

Computer Science

Class 12 Computer Science Questions asked by Filo students

Views: 5,522

(Display five messages) Write a program that displays Wel come to Java five times.

Topic:

Computer Science

View solution

Views: 5,530

(Compute expressions) Write a program that displays the result of

\frac{9.5 \times 4.5 - 2.5 \times 3}{45.5 - 3.5}

Topic:

Computer Science

View solution

Views: 5,736

(Sum the digits in an integer) Write a program that reads an integer between 0 and 1000 and adds all the digits in the integer. For example, if an integer is

932,

the sum of all its digits is 14 Hint: Use the

%

operator to extract digits, and use the / operator to remove the extracted digit. For instance,

932%10 = 2

932/10 = 93

Here is a sample run:

Topic:

Computer Science

View solution

Views: 5,365

(Physics: acceleration) Average acceleration is defined as the change of velocity divided by the time taken to make the change, as shown in the following formula:

a = \frac{v _{1} - v _{0}}{t}

Write a program that prompts the user to enter the starting velocity

v_{0}

in meters/second, the ending velocity

v_{1}

in meters/second, and the time span

t

in seconds, and displays the average acceleration. Here is a sample run:

Topic:

Computer Science

View solution

Views: 5,857

(Population projection) Rewrite Exercise 1.11 to prompt the user to enter the number of years and displays the population after the number of years. Here is a sample run of the program:

Topic:

Computer Science

View solution

Views: 5,348

(Financial application: payroll) Write a program that reads the following information and prints a payroll statement: Employee's name (e.g., Smith) Number of hours worked in a week (e.g., 10 ) Hourly pay rate (e.g., 6.75 ) Federal tax withholding rate (e.g.,

20%

) State tax withholding rate (e.g., 9\%)

Topic:

Computer Science

View solution

Views: 5,849

(Algebra: solve quadratic equations) The two roots of a quadratic equation

a x^{2} + b x + c = 0

can be obtained using the following formula:

r_{1} = \frac{- b + b ^{2} - 4 a c}{2 a} and r_{2} = \frac{- b - b ^{2} - 4 a c}{2 a}

b^{2} - 4 a c

is called the discriminant of the quadratic equation. If it is positive, the equation has two real roots. If it is zero, the equation has one root. If it is negative, the equation has no real roots.Write a program that prompts the user to enter values for

a, b,

c

and displays the result based on the discriminant. If the discriminant is positive, display two roots. If the discriminant is

0,

display one root. Otherwise, display "The equation has no real roots".Note that you can use Math.pow(x, 0.5) to compute

x

. Here are some sample runs.

Topic:

Computer Science

View solution

Views: 5,274

(Algebra: solve

2 \times 2

linear equations) You can use Cramer's rule to solve the following

2 \times 2

system of linear equation:

a x + b y = e c x + d y = f x = \frac{e d - b f}{a d - b c} y = \frac{a f - ec}{a d - b c}

Write a program that prompts the user to enter

a, b, c, d, e,

f

and displays the result. If

a d - b c

0,

report that "The equation has no solution".Enter

a, b, c, d, e, f : 9.04.03.0 - 5.0 - 6.0 - 21.0

i s - 2.0 an d

i s 3.0 E n t er

a, b, c, d, e, f: 1.0 \quad 2.02 .04 .04 .05 .0$The equation has no solution

Topic:

Computer Science

View solution

Views: 5,676

(Business: check ISBN-IO) An ISBN-10 (International Standard Book Number) consists of 10 digits:

d_{1} d_{2} d_{3} d_{4} d_{5} d_{6} d_{7} d_{8} d_{9} d_{10} .

The last digit,

d_{10}

is a checksum, which is calculated from the other nine digits using the following formula:

(d_{1} \times 1 + d_{2} \times 2 + d_{3} \times 3 + d_{4} \times 4 + d_{5} \times 5 + d_{6} \times 6 + d_{7} \times 7 + d_{8} \times 8 + d_{9} \times 9) %11

If the checksum is

10,

the last digit is denoted as

X

according to the ISBN-10 convention. Write a program that prompts the user to enter the first 9 digits and displays the 10 -digit ISBN (including leading zeros). Your program should read the input as an integer. Here are sample runs:Enter the first 9 digits of an ISBN as integer: 013601267 The ISBN-10 number is 0136012671Enter the first 9 digits of an ISBN as integer: 013031997 The ISBN-10 number is

013031997 x

Topic:

Computer Science

View solution

Question 10

Views: 5,204

(Game: addition quiz) Listing

3.4,

SubtractionQuiz, java, randomly generates a subtraction question. Revise the program to randomly generate an addition question with two integers less than 100 .

Topic:

Computer Science

View solution

Found the solution, but did not understand the concept?

Connect with a tutor in less than 60 seconds 24x7

Ask my first question

Question 11

Views: 5,068

(Check a number) Write a program that prompts the user to enter an integer and checks whether the number is divisible by both 5 and

6,

or neither of them, or just one of them. Here are some sample runs for inputs

10, 30,

and 2310 is divisible by 5 or

6,

but not both30 is divisible by both 5 and 623 is not divisible by either 5 or 6

Topic:

Computer Science

View solution

Question 12

Views: 5,743

(Science: wind-chill temperature) Programming Exercise 2.17 gives a formula to compute the wind-chill temperature. The formula is valid for temperatures in the range between

- 5 8^{\circ} F

4 1^{\circ} F

and wind speed greater than or equal to 2 Write a program that prompts the user to enter a temperature and a wind speed. The program displays the wind-chill temperature if the input is valid; otherwise, it displays a message indicating whether the temperature and/or wind speed is invalid.

Topic:

Computer Science

View solution

Question 13

Views: 5,244

(Geometry: point in a circle?) Write a program that prompts the user to enter a point

(x, y)

and checks whether the point is within the circle centered at (0,0) with radius

10.

For example, (4,5) is inside the circle and (9,9) is outside the circle, as shown in Figure 3.9 a.(Hint: A point is in the circle if its distance to (0,0) is less than or equal to

10.

The formula for computing the distance is

(x_{2} - x_{1})^{2} + (y_{2} - y_{1})^{2} .

Test your program to cover all cases.) Two sample runs are shown below.Enter a point with two coordinates: 45 Point (4.0,5.0) is in the circleEnter a point with two coordinates: 99 Point (9.0,9.0) is not in the circle

Topic:

Computer Science

View solution

Question 14

Views: 5,214

(Game: pick a card) Write a program that simulates picking a card from a deck of 52 cards. Your program should display the rank (Ace,

2, 3, 4, 5, 6, 7, 8, 9, 10,

Jack, Queen, King) and suit (CTubs, Diamonds, Hearts, Spades) of the card Here is a sample run of the program:The card you picked is Jack of Hearts

Topic:

Computer Science

View solution

Question 15

Views: 5,130

(Use the 88 , || and \wedge operators) Write a program that prompts the user to enter an integer and determines whether it is divisible by 5 and

6,

whether it is divisible by 5 or

6,

and whether it is divisible by 5 or

6,

but not both. Here is a sample run of this program:Enter an integer: 10Is 10 divisible by 5 and

6 ?

false Is 10 divisible by 5 or

6 ?

true Is 10 divisible by 5 or

6,

but not both? true

Topic:

Computer Science

View solution

Question 16

Views: 5,191

(Financial: compare costs) Suppose you shop for rice in two different packages. You would like to write a program to compare the cost. The program prompts the user to enter the weight and price of the each package and displays the one with the better price. Here is a sample run:Enter weight and price for package

1 : 50 24.59

Enter weight and price for package 2: 2511.99 Package 1 has a better price.

Topic:

Computer Science

View solution

Question 17

Views: 5,425

(Geometry: point on line segment) Exercise 3.32 shows how to test whether a point is on an unbounded line. Revise Exercise 3.32 to test whether a point is on a line segment. Write a program that prompts the user to enter the three points for

p 0, p 1,

p 2

and displays whether

p 2

is on the line segment from

p 0

p 1.

Here are some sample runs:Enter three points for

p 0, p 1,

p 2 : 112.52.51.51.5

(1.5,1.5) is on the line segment from (1.0,1.0) to (2.5,2.5)Enter three points for

p 0, p 1,

p 2 : 11223.53.5

(3.5,3.5) is not on the line segment from (1.0,1.0) to (2.0,2.0)

Topic:

Computer Science

View solution

Question 18

Views: 5,652

(Repeat additions) Listing

4.4,

SubtractionQuizLoop.java, generates five random subtraction questions. Revise the program to generate ten random addition questions for two integers between 1 and

15.

Display the correct count and test time.

Topic:

Computer Science

View solution

Question 19

Views: 5,516

(Conversion from miles to kilometers) Write a program that displays the following two tables side by side (note that 1 mile is 1.609 kilometers and that 1 kilometer is

.621 miles

Miles 12 \dots 910 Kilometers 1.609 3.218 14.481 16.090

Kilometers 2025 Miles 12.430 15.538 37.290 40.398 6065

Topic:

Computer Science

View solution

Question 20

Views: 5,551

(Find the smallest

n

n^{2} > 12, 000

) Use a while loop to find the smallest integer

n

n^{2}

is greater than 12,000 .

Topic:

Computer Science

View solution

Prev

1 2 3 4 5 6...101

Next

Get instant study help from an expert tutor 24/7