Description
For this assignment, please note that NO jQuery may be used. You must write everything in core JavaScript.
You must do all questions regardless of whether you are working alone or in pairs.
1) A class of ten students took a quiz. The grades (integers in the range 0 to 100) for this quiz are available
to you. Determine the class average on the quiz.
2) Develop a class-averaging program that will process an arbitrary number of grades each time the
program is run.
3) (Nested Control Statement) A college offers a course that prepares students for the state licensing exam
for real estate brokers. Last year, several of the students who completed this course took the licensing
exam. Naturally, the college wants to know how well its students performed. You have been asked to
write a program to summarize the results. You have been given a list of these 10 students. Next to each
name is written a 1 if the student passed the exam and a 2 if the student failed. Your program should
analyze the results of the exam as follows:
a. Input each test result (i.e., a 1 or a 2). Display the message “Enter result” on the screen each
time the program requests another test result.
b. Count the number of test results of each type.
c. Display a summary of the test results indicating the number of students who passed and the
number of students who failed.
d. If more than eight students passed the exam, print the message “Raise tuition.”
4) Write a script that finds the smallest of several non-negative integers. Assume that the first value read
specifies the number of values to be input from the user.
5) Write a script that calculates the product of the odd integers from 1 to 15 then outputs HTML text that
displays the results.
6) Write a script that outputs XHTML to display the given patterns separately, one below the other. Use for
statements to generate the patterns. All asterisks (*) should be printed by a single statement of the form
document.write( “*” ); (this causes the asterisks to print side by side). A statement of the form
document.writeln( “
” ); can be used to position to the next line. A statement of the form
document.write( ” ” ); can be used to
display a space (needed for the last two
patterns). There should be no other output
statements in the program. [Hint: The last
two patterns require that each line begin
with an appropriate number of blanks. You
may need to use the XHTML
tags.]
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7) Drivers are concerned with the mileage obtained by their automobiles. One driver has kept track of
several tankfuls of gasolie by recording the number of miles driven and the number of gallons used for
each thankful. Develop a script that will take as input the miles driven and gallons used (both as
integers), for each thankful. The script should calculate and output HTML5 text that displays the number
of miles per gallon obtained for each thankful and prints the combined number of miles per gallon
obtained for all tankfuls up to this point. Use prompt dialogs to obtain the data from the users. Use your
own made-up data to solve the problem.
8) A large company pays its salespeople on a commission basis. The salespeople receive $200 per week,
plus 9 percent of their gross sales for the week. For example, a salesperson who sells $5000 worth of
merchandise in a week receives $200 plus 9 percent of $5,000, or a total of $650. You have been
supplied with a list of the items sold by each salesperson. The value of these items are as follows:
Item Value
1 239.99
2 129.75
3 99.95
4 350.89
Develop a script that inputs one salesperson’s items sold for last week, calculates the salesperson’s
earnings, and outputs HTML5 text that displays the salesperson’s earnings.
9) Develop a script that will determine the gross pay for each of three employees. The company pays
“straight time” for the first 40 hours worked by each employee and pays “time and a half” for all hours
worked in excess of 40 hours. You’re given a list of the employees of the company, the number of hours
each employee worked last week, and the hourly rate of each employee. Your script should input this
information for each employee, determine the employee’s gross pay and output HTML5 text that
displays the employee’s gross pay. Use prompt dialogs to input the data. Some sample data:
Employee Number Number of Hours Worked Last Week Hourly Rate For Each Employee
1 40 22.25
2 55 27.35
3 43 19.76
4 35 20.03
5 61 31.02
6 12 21.05
Challenge (coming later but you can attempt): Can you put the information in a JSON or XML file, have
your program read that file, and then print the resulting data. What if this info was in a DB … AJAX
10) The process of finding the largest value (i.e. the maximum of a group of values) is used frequently in
computer applications. For example, a script that determines the winner of a sales contest would input
the number of units sold by each salesperson. The salesperson who sells the most units wins the
content. Write a script that inputs a series of 10 single-digit numbers as characters {eg. 6, 7, 3, 6, 4, 2, 5,
-7, 1, 2} determines the largest of the numbers, and outputs a message that displays the largest number.
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Your script should use three variables: counter, number (the current digit input to the script, largest (the
largest number found so far). Note that you can also change the program to be sentinel controlled to
end whenever the user specifies, dealing with an unspecified data range.
11) Write a script that outputs HTML5 text that keeps displaying in the browser window the multiples of the
integer 2 – namely, 2, 4, 8, 16, 32, 64, etc. Your loop should not terminate (make it an infinite loop).
What happens when you run this script?
12) A company wants to transmit data over the telephone, but it is concerned that its phones may be
tapped. All of its data is transmitted as four-digit integers. It has asked you to write a program that will
encrypt its data so that the data may be transmitted more securely. Your script should read a four-digit
integer entered by the user in a prompt dialog and encrypt it as follows: Replace each digit by (the sum
of that digit plus 7) modulus 10. Then swap the first digit with the third, and swap the second digit with
the fourth. Then output text that displays the encrypted integer. Once this is done, write a program that
inputs an encrypted four-digit integer and decrypts it to form the original number.
13) A palindrome is a number or a text phrase that reads the same backward and forward. For example,
each of the following five-digit integers is a palindrome: 12321, 55555, 45554, 11611. Write a script that
reads in a five-digit integer and determines whether it’s a palindrome. If the number is not five digits
long, display an alert dialog indicating the problem to the user. Allow the user to enter a new value after
dismissing the alert dialogue. [hint: try using both division and remainder operations to “pick-off” each
digit]
14) A person invests $1000.00 in a savings account yielding 5 percent interest. Assuming that all the interest
is left on deposit, calculate and print the amount of money in the account at the end of each year for 10
years. Use the following formula to determine the amounts:
a. a = p * (1 + r)n where p is the original amount invested (i.e., the principal), r is the annual
interest rate, n is the number of years, a is the amount on deposit at the end of the nth year.
b. Create a program which puts the value of the amount on deposit every year for the next 10
years, as well as the count of the year, in a table.