Problem 01

Problem Statement

You are tasked with creating a function named gradeCategory for a grading system. This function takes a numeric grade as input and categorizes it into a specific category based on the following rules:

• If the grade is less than 0 or greater than 100, the function should return "Invalid Grade."

• If the grade is between 0 and 49 (inclusive), the function should return "Fail."

• If the grade is between 50 and 59 (inclusive), the function should return "Pass."

• If the grade is between 60 and 74 (inclusive), the function should return "Credit."

• If the grade is between 75 and 89 (inclusive), the function should return "Distinction."

• If the grade is between 90 and 100 (inclusive), the function should return "High Distinction."

Your gradeCategory function should accept a single parameter:

1. grade: an integer representing the student's grade.

The function should return the appropriate category as a string based on the rules mentioned above.

Here are some examples:

• gradeCategory(45) should return "Fail" because the grade is in the range [0, 49].

{Try It!}(node .guides/gradeCategory/try-it-01.js)

• gradeCategory(55) should return "Pass" because the grade is in the range [50, 59].

{Try It!}(node .guides/gradeCategory/try-it-02.js)

• gradeCategory(70) should return "Credit" because the grade is in the range [60, 74].

{Try It!}(node .guides/gradeCategory/try-it-03.js)

• gradeCategory(85) should return "Distinction" because the grade is in the range [75, 89].

{Try It!}(node .guides/gradeCategory/try-it-04.js)

Constraints:

• The input grade is an integer within the range [-1000, 1000].

Solution

node .guides/secure/gradeCategoryTest.js

console.log(gradeCategory(-10)); // Expected output: "Invalid Grade" console.log(gradeCategory(0)); // Expected output: "Fail" console.log(gradeCategory(54)); // Expected output: "Pass" console.log(gradeCategory(82)); // Expected output: "Distinction" console.log(gradeCategory(100)); // Expected output: "High Distinction"

Problme 02

Problem

You are working on a simple calculator application, and you need to implement a function named operationResult. This function will take three parameters:

1. num1: an integer representing the first number.
2. num2: an integer representing the second number.
3. operation: a string representing the operation to be performed. It can take one of the following values: "add", "subtract", "multiply", or "divide".

Your operationResult function should perform the specified operation on num1 and num2 and return the result as an integer.

The operations are defined as follows:

• If operation is "add", return the sum of num1 and num2.
• If operation is "subtract", return the result of subtracting num2 from num1.
• If operation is "multiply", return the product of num1 and num2.
• If operation is "divide", return the result of dividing num1 by num2.

You can assume that the division operation will always result in a whole number.

Here are some examples:

• operationResult(5, 3, "add") should return 8 because it's the sum of 5 and 3.

{Try It!}(node .guides/operationResult/try-it-01.js)

• operationResult(10, 4, "subtract") should return 6 because it's the result of subtracting 4 from 10.

{Try It!}(node .guides/operationResult/try-it-02.js)

• operationResult(7, 2, "multiply") should return 14 because it's the product of 7 and 2.

{Try It!}(node .guides/operationResult/try-it-03.js)

• operationResult(8, 4, "divide") should return 2 because it's the result of dividing 8 by 4.

{Try It!}(node .guides/operationResult/try-it-04.js)

Constraints

• The input num1 and num2 are integers within the range [-1000, 1000].
• The operation parameter will always be one of the four valid operation strings: "add", "subtract", "multiply", or "divide".

Solution

node .guides/secure/operationResultTest.js

console.log(operationResult(5, 3, "add")); // Expected output: 8 console.log(operationResult(10, 4, "subtract")); // Expected output: 6 console.log(operationResult(7, 2, "multiply")); // Expected output: 14 console.log(operationResult(8, 4, "divide")); // Expected output: 2 console.log(operationResult(10, 5, "divide")); // Expected output: 2

Problem 03

Problem

You are a dog owner, and your furry friend, Buddy, has a peculiar behavior. Buddy tends to bark excessively when certain conditions are met. You want to create a function named dogBark to determine if Buddy is likely to bark based on the current situation.

The dogBark function should accept two parameters:

1. alone: a boolean value indicating if Buddy is left alone. true means Buddy is alone, false means someone is home.
2. hour: an integer value representing the current hour in a 24-hour format (0 to 23).

Buddy is likely to bark under the following conditions:

• If Buddy is left alone and the hour is between 20 to 23 (8 PM to 11 PM).
• If Buddy is left alone and the hour is between 0 to 5 (12 AM to 5 AM).

The function should return true if Buddy is likely to bark based on these conditions and false otherwise.

Here are some examples:

• dogBark(true, 21) should return true because Buddy is alone, and it's between 8 PM to 11 PM.

{Try It!}(node .guides/dogBark/try-it-01.js)

• dogBark(true, 3) should return true because Buddy is alone, and it's between 12 AM to 5 AM.

{Try It!}(node .guides/dogBark/try-it-02.js)

• dogBark(false, 15) should return false because Buddy is not alone, and the time is irrelevant.

{Try It!}(node .guides/dogBark/try-it-03.js)

Constraints

• The input hour is an integer within the range [0, 23].
• The alone parameter is a boolean value (true or false).

Solution

node .guides/secure/dogBarkTest.js

console.log(dogBark(true, 3)); // Expected output: true console.log(dogBark(false, 15)); // Expected output: false console.log(dogBark(true, 23)); // Expected output: true console.log(dogBark(true, 4)); // Expected output: true