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Class 11 Computer Science Questions asked by Filo students

Views: 5,432

(Print a table) Write a program that displays the following table:

a 1234 a^{\land} 2 14916 a^{\land} 3 182764

Topic:

Computer Science

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Views: 5,965

π) π

can be computed using the following formula:

π = 4 \times (1 - \frac{1}{3} + \frac{1}{5} - \frac{1}{7} + \frac{1}{9} - \frac{1}{11} + \dots)

Write a program that displays the result of

4 \times (1 - \frac{1}{3} + \frac{1}{5} - \frac{1}{7} + \frac{1}{9} - \frac{1}{11})

4 \times (1 - \frac{1}{3} + \frac{1}{5} - \frac{1}{7} + \frac{1}{9} - \frac{1}{11} + \frac{1}{13})

. Use 1.0 instead of 1 in yourprogram.

Topic:

Computer Science

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Views: 5,597

(Area and perimeter of a circle) Write a program that displays the area and perimeter of a circle that has a radius of 5.5 using the following formula:

perimeter = 2 \times radius \times π area = radius \times radius \times π

Topic:

Computer Science

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Views: 5,700

(Area and perimeter of a rectangle) Write a program that displays the area and perimeter of a rectangle with the width of 4.5 and height of 7.9 using the following formula:

area = width \times height

Topic:

Computer Science

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Views: 5,440

(Convert Celsius to Fahrenheit) Write a program that reads a Celsius degree in a double value from the console, then converts it to Fahrenheit and displays the result. The formula for the conversion is as follows:fahrenheit

= (9/5)

Celsius +32Hint: In Java, 9 / 5 is 1, but 9.0 / 5 is 1.8.Here is a sample run:

Topic:

Computer Science

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Views: 5,554

(Convert feet into meters) Write a program that reads a number in feet, converts it to meters, and displays the result. One foot is 0.305 meter. Here is a sample run:

Topic:

Computer Science

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Views: 5,299

(Convert pounds into kilograms) Write a program that converts pounds into kilograms. The program prompts the user to enter a number in pounds, converts it to kilograms, and displays the result. One pound is 0.454 kilograms. Here is a sample run:

Topic:

Computer Science

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Views: 5,944

(Physics: finding runway length) Given an airplane's acceleration

a

and take-off speed

v,

you can compute the minimum runway length needed for an airplane to take off using the following formula:

length = \frac{v ^{2}}{2 a}

Write a program that prompts the user to enter

v

in meters/second (m/s) and the acceleration

a

in meters/second squared

(m / s^{2}),

and displays the minimum runway length. Here is a sample run:

Topic:

Computer Science

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Views: 5,800

(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:(Financial application: compound value) Suppose you save \ 100

e a c hm o n t hin t o a s a v in g s a cco u n tw i t h t h e ann u a l in t eres t r a t e

T h u s, t h e m o n t h l y in t eres t r a t e i s

0.05 / 12=0.00417 .$ After the first month, the value in the account becomes

100 * (1 + 0.00417) = 100.417

After the second month, the value in the account becomes

(100 + 100.417) is (1 + 0.00417) = 201.252

After the third month, the value in the account becomes

(100 + 201.252) * (1 + 0.00417) = 302.507

and so on.Write a program that prompts the user to enter a monthly saving amount and displays the account value after the sixth month. (In Exercise

4.30,

you will use a loop to simplify the code and display the account value for any month.)

Topic:

Computer Science

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Question 10

Views: 5,813

(Geometry: area of a triangle) Write a program that prompts the user to enter three points

(x 1, y 1), (x 2, y 2), (x 3, y 3)

of a triangle and displays its area. The formula for computing the area of a triangle is

s = (side 1 + side 2 + side 3) /2

area = s (s - side 1) (s - side 2) (s - side 3)

Here is a sample run:

Topic:

Computer Science

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Question 11

Views: 5,979

(Science: wind-chill temperature) How cold is it outside? The temperature alone is not enough to provide the answer. Other factors including wind speed, relative humidity, and sunshine play important roles in determining coldness outside. In

2001,

the National Weather Service (NWS) implemented the new wind-chill temperature to measure the coldness using temperature and wind speed. The formula is:

t_{w c} = 35.74 + 0.6215 t_{a} - 35.75 v^{0.16} + 0.4275 t_{a} v^{0.16}

t_{a}

is the outside temperature measured in degrees Fahrenheit and

v

is the speed measured in miles per hour.

t_{w c}

is the wind-chill temperature. The formula cannot be used for wind speeds below 2 mph or temperatures below

- 5 8^{\circ} F

4 1^{\circ} F

Write a program that prompts the user to enter a temperature between

- 5 8^{\circ} F

4 1^{\circ} F

and a wind speed greater than or equal to 2 and displays the wind-chill temperature. Use Math .pow(a,b) to compute

v^{0.16} .

Here is a sample run:

Topic:

Computer Science

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Question 12

Views: 5,475

(Print a table) Write a program that displays the following table:

a 12345 b 23456 pow (a, b) 1881102415625

Topic:

Computer Science

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Question 13

Views: 5,252

(Geometry: distance of two points) Write a program that prompts the user to enter two points

(x 1, y 1)

(x 2, y 2)

and displays their distance between them. The formula for computing the distance is

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

. Note that you can use Math.pow(a, 0.5 ) to compute

a

. Here is a sample run:

Topic:

Computer Science

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Question 14

Views: 5,471

(Financial application: calculate interest) If you know the balance and the annual percentage interest rate, you can compute the interest on the next monthly payment using the following formula: interest

=

\times

(annual Interest Rate

/1200

) Write a program that reads the balance and the annual percentage interest rate and displays the interest for the next month. Here is a sample run:

Topic:

Computer Science

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Question 15

Views: 5,733

(Random character) Write a program that displays a random uppercase letter using the System. CurrentTimeMil 7 is () method.

Topic:

Computer Science

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Question 16

Views: 5,542

(Find the character of an ASCII code) Write a program that receives an ASCII code (an integer between 0 and 127) and displays its character. For example, if the user enters

97,

the program displays character a. Here is a sample run:

Topic:

Computer Science

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Question 17

Views: 5,645

(Financial application: monetary units) Rewrite Listing 2.10 ComputeChange.java, to fix the possible loss of accuracy when converting a double value to an int value. Enter the input as an integer whose last two digits represent the cents. For example, the input 1156 represents 11 dollars and 56 cents.

Topic:

Computer Science

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Question 18

Views: 5,372

(Game: add three numbers) The program in Listing 3.1 generates two integers and prompts the user to enter the sum of these two integers. Revise the program to generate three single-digit integers and prompt the user to enter the sum of these three integers.

Topic:

Computer Science

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Question 19

Views: 5,144

(Find the number of days in a month) Write a program that prompts the user to enter the month and year and displays the number of days in the month. For example, if the user entered month 2 and year 2012 , the program should display that February 2012 had 29 days. If the user entered month 3 and year

2015,

the program should display that March 2015 had 31 days.

Topic:

Computer Science

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Question 20

Views: 5,480

(Game: heads or tails) Write a program that lets the user guess whether the flip of a coin results in heads or tails. The program randomly generates an integer 0 or 1 which represents head or tail. The program prompts the user to enter a guess and reports whether the guess is correct or incorrect.

Topic:

Computer Science

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