98-382 : Introduction to Programming Using JavaScript : Part 02

1. HOTSPOT

You are creating JavaScript code that manipulates dates. You want to initialize a Date object with the date January 1, 2017 by using the year, month, and date parameters.

How should you complete the code? To answer, select the appropriate code segment in the answer area.

2. HOTSPOT

Your instructor has asked you to write a program that uses simple rules to help determine if a person should take the train, drive their car, or ride a bike, depending on the conditions of the weather and the amount of gas in the car’s tank.

The program has the following requirements:
– When the temperature is above 65 degrees and it is not raining, the person should be told to ride their bike.
– When it is raining, the person should be told to drive their car.
– If their car has half a tank of gas or less, they should be told to take the train.

How should you complete the code? To answer, select the appropriate code segments in the answer area.

3. HOTSPOT

You are using JavaScript to create a function that calculates admission price.

The function must meet the following requirements:
– The function accepts the age of the customer as a parameter
– A customer who is less than 5 years old gets in free
– A customer who is 65 years old or older gets in free
– A customer who is 5 years old to 17 years old, pays \$10 USD
– All other customers pay \$20 USD

How should you complete the code? To answer, select the appropriate code segments in the answer area.

NOTE: Each correct selection is worth one point.

4. HOTSPOT

The ABC company offers a mid-week discount of 10% on Wednesdays.

You need to write a JavaScript function that meets the following requirements:
– Accepts the day of the week as a string
– Returns the appropriate discount

You create the following code. Line numbers are included for reference only.

You must complete the code at lines 03, 04, and 07.

How should you complete the code? To answer, select the appropriate code segments in the answer area.

NOTE: Each correct selection is worth one point.

5. DRAG DROP

You need to write a loop that will traverse the length of an array to find the value orange. If an array element value is null, the code should immediately go to the next element. When the value is found, the loop should exit.

How should you complete the code? To answer, drag appropriate keywords to the correct locations. Each keyword may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.

6. DRAG DROP

Your instructor has asked you to implement code that would display a two-dimensional array of any size inside a <div> tag.

You write the following code:

You need to complete the code.

Which three segments should you use to develop the solution? To answer, move the appropriate code segments from the list of code segments to the answer area and arrange them in the correct order.

7. HOTSPOT

You are using JavaScript to write a safe root math utility that has the following requirements:
Given the function safeRoot(a, b):
If the radicand (a) is non-negative, return Math.pow (a, 1/b);
Otherwise,
If the index (b) is divisible by 2, then return text indicating the result is imaginary.
Otherwise return -Math.pow (-a, 1/b)

How should you complete the code? To answer, select the appropriate code segments in the answer area.

NOTE: Each correct selection is worth one point.

8. HOTSPOT

You are creating a function named countdown. The function accepts a single parameter, start, and displays a countdown from that number down to zero in increments of one.

How should you complete the code? To answer, select the appropriate code segments in the answer area.

9. HOTSPOT

You are creating a calendar application. You need to ensure that the code works correctly for all months of the year.

How should you complete the code? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

10. HOTSPOT

You are creating a function that does safe division.

The function has the following requirements:
– The function receives two parameters for the numerator and denominator.
– If the denominator is zero, the function must return false.
– If the denominator is not zero, the function must return true.

You write the following code. Line numbers are included for reference only.

For each of the following statements, select Yes if the statement is true. Otherwise, select No.

NOTE: Each correct selection is worth one point.

11. HOTSPOT

Variable x has a value of 5. Variable y has a value of 7.

For each of the following expressions, select True if the statement evaluates to true. Otherwise, select False.

NOTE: Each correct selection is worth one point.

12. DRAG DROP

You are developing a web page that uses JavaScript. The script needs to display information to the user using a popup box.

Match each function that displays a popup box with its appropriate scenario.

To answer, drag the appropriate function from the column on the left to its appropriate scenario on the right. Each function may be used once, more than once, or not at all.

NOTE: Each correct selection is worth one point.

13. HOTSPOT

You are designing a function that allows you to perform unit tests on other functions in a library. You will invoke each library function by using the eval JavaScript function. If an exception occurs when invoking a function, you want to display a message box with the following message:

The function does not exist.

How should you complete the code? To answer, select the appropriate code segment in the answer area.

NOTE: Each correct selection is worth one point.

Review the underlined text. If it makes the statement correct, select “No change is needed”. If the statement is incorrect, select the answer choice that makes the statement correct.

• No change is needed
• the value of x is 3
• the value of x is 5
• the value of x is undefined

• 01
• 02
• 03
• 04
• 05

17. HOTSPOT

For each of the following statements, select Yes if the statement is true. Otherwise, select No.

NOTE: Each correct selection is worth one point.

18. HOTSPOT

You are evaluating a colleague’s code to ensure it meets best practices.

For each of the following statements, select Yes if the statement is true. Otherwise, select No.

NOTE: Each correct selection is worth one point.

19. DRAG DROP

Evaluate the following code. Line numbers are included for reference only.

What is the value of each variable at line 07? To answer, drag the appropriate value to the correct variable. Each value may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.

NOTE: Each correct selection is worth one point.

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