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Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Again --4. Write a program that calculates an adult's fat-burning heart rate, which is 70% of 220 minus the person's age. Complete fat_burning_heart_rate() to calculate the fat burning heart rate. The adult's age must be between the ages of 18 and 75 inclusive. If the age entered is not in this range, raise a ValueError exception in get_age() with the message "Invalid age." Handle the exception in __main__ and print the ValueError message along with "Could not calculate heart rate info." Ex: If the input is: 35 the output is: Fat burning heart rate for a 35 year-old: 129.5 bpm If the input is: 17 the output is: Invalid age. Could not calculate heart rate info.?.
4043143640684x3y7 In the code below, we compute the sum of integers in a file by reading them one line at a time. Rearrange the following lines of code so that the input file is closed even if the int function raises an exception. Follow Programming Tip "Do not use except and finally in the same try statement" in the Exception Handling section by placing the try block and finally clause inside the outer try block. How to use this tool Unused try : Check You've added 7 blocks, but 8 were expected. Not all tests passed. 1: Compare output Input Your output X 2: Compare output Input Output differs. See highlights below. Special character legend Your output numbers1.txt Expected output Total: 100 Closing file numbers2.txt Tester.py total = 0 infile open (input()) try: Total: 554 Closing file Error: Not an integer value. except ValueError : Error: Not an integer value. Total: 554 Closing file for line in infile : value = int(line) total= total + value finally : print("Error: Not an integer…
C# Create a program that will read 10 names and scores from the input.txt file which I have supplied. Make sure to use exception handling when opening this text file. Calculate the average, highest score, and lowest score Create your own Exception to test if average is less 60. If so, display a message from the custom exception that says "Average not up to NC State standards. Class is eliminated." If average is 60 or greater, write the average, highest score and name, lowest score with name to an output.txt file (with exception handling when file is created). Hint: Probably want to use StreamReader and StreamWriter. BELOW IS THE INFO FROM THE INPUT.txt Mary 90 Tony 20 Roy 60 Debbie 10 Sarah 80 Doug 30 Willy 10 Pete 30 Theresa 94 Zeus 36
-Modify your parameter constructors to call your set methods. This will cause validation of the parameter.-Create an exception class named TractorException.-Modify your setters to throw TractorException if invalid values are passed in. You may also need to add a throws clause to your parameter constructors. This way we will not have any print methods in our Tractor object defining class-Modify your main method to try and catch exceptions. It should catch TractorExceptions and general Exceptions and display an appropriate message import java.util.*; class TestException { public static void main(String s[]) { Scanner scanner = new Scanner(System.in); boolean valid=false; // validation loop while (!valid) { try { System.out.println("Enter integer:"); int number = scanner.nextInt(); // may throw an exception System.out.println("You entered "+ number); valid=true;…
What is a throw point? 2. What is an exception handler? 3. Explain the difference between a try block and a catch block. 4. What happens if an exception is thrown, but not caught? 5. Complete the following function that searches a numeric array for a specified value. The function should return the subscript of the element containing the value if it is found in the array. If the value is not found, the function should throw an exception. int searchArray(int array[], int size, int value){ int index = 0; // Used as an index to search array int subscript = -1; // To record position of search value while (index < size && subscript == -1) { if (array[index] == value) // If the value is found ___________________________________________________ ___________________________________________________ } if (subscript == -1) ___________________________________________________ return subscript; } Bonus…
Complete the following tasks: Write an exception handler to catch ValueError and output 'float(): Input is not a float.' Write an exception handler to catch OverflowError and output 'math.pow(): result of 5 raised to the power of ', followed by x_value and ' is too large.'
In Java, please comment and comment with output please This programming assignment involves learning about some of the common exceptions that occur in Java programs. Consider the following exception types: NullPointerException ArrayIndexOutOfBoundsException ClassCastException IllegalArgumentException Research what each exception type means and the conditions under which each occurs (i.e., is thrown). Write programs that demonstrate each type of exception being thrown (one program per exception) and provide a screen capture of the output. Name your programs as follows: NullPointerExceptionThrown, etc. Then, write a program that catches each type of thrown exception and display an error message indicating some of the details as to what that exception is. Write one program per type of exception. Name your programs as follows: NullPointerExceptionCatch, etc.
Time Converter 1. Write a program that converts dates from a numerical month-day format to alphabetic month-day format. IE 1/31 or 01/31 would have an output of January 31. 1. User enters the month and day as a single string. It is then converted. (10%) 2. Create 2 exception classes (20%) 1. MonthException thrown for invalid months 2. DayException-thrown for invalid days for the given month 3. You can assume Feb is always 28 days 2. This should run in a for loop and end when a user is done entering dates (70%)
Programming Problem 1 – CycleThrowTryCatch Revisit the Cycle class in Module 3. Modify your application such that the properties, numberOfWheels and weightare entered as double values interactively (at the keyboard). Exception handling will be used to determine whether a type mismatch occurs. Edit your application such that, in addition to [A], the values for numberOfWheels and weight, entered interactively, will throw a new exception “Values cannot be less than or equal to zero” only If the values are less than or equal to zero. Add or use the appropriate try and/or catch blocks. Directions Examine your application for the class called Cycle. Add Try and Catch blocks appropriately. Add the throw statement for the new exception. Display an appropriate message if an exception occurs. Display the properties of the object.
1. Create an exception class called SocSecException. The UML diagram for this class is below. SocSecException + SocSecException(error: String) : The constructor will call the superclass constructor. It will set the message associated with the exception to "Invalid social security number" concatenated with the error string. 2. Create a driver program called SocSecProcessor. This program will have a main method and a static method called isValid that will check if the social security number is valid. SocSecProcessor + main(args : String[]): void + is Valid(ssn: String): boolean Copyright © 2019 Pearson Education, Inc., Hoboken NJ Task #2 Writing Code to Handle an Exception 1. In the main method: a. The main method should read a name and social security number from the user as String objects. b. The main method should contain a try-catch statement. This statement tries to check if the social security number is valid by using the method isValid. If the social security number is valid, it…
In c++ implement function getPercentage that takes two inputs: grade and total Grade and outputsthe gradepercentage as follows: percentage = (grade/total grade)*100 . (Assume a student can notget a grade above 100%)Define your own exception classes:1. DivideByZeroException as a derived class of Standard Library class runtime_error,that is used to detect division by zero run time error.2. NegativeNumberException as a derived class of Standard Library class logic_error,that is used to detect if the user entered a negative number as a grade.3. InvalidGradeException as a derived class of Standard Library class logic_ error, thatis used to detect if a user entered an invalid input (grade greater than total grade).Use the above exception classes after implementing them to apply exception handling foryour getPercentage function.
in C++ Define a new exception class named “VarNameException” that must inheritfrom the C++ runtime_error class. This class will capture the error case for avariable name when it does not start with a letter (lower case or upper case) or contains at least one blank. For example, if the user tries to create with a variable name of "1name", "?name" or "my name", it will generate an exception and this class should capture the reasonand the error value.