Java Script Certification Functions, Debugging & Loops

Which JavaScript statement should you use to test for a single condition and branch to a process?

• for

• while

• if...else

• if

Which of the following statements is true of control structures?

• They are methods that return at least one value.

• They are used in code to avoid program errors.

• They are exclusive to JavaScript.

• They make decisions based on Boolean values.

Which code will display an alert if the variable timerMinutes has a value 10?

• if ("timerMinutes" = 10) {   alert("Time Expired!"); }

• if ("timerMinutes" == 10); {   alert("Time Expired!"); }

• if ("timerMinutes" = 10) alert("Time Expired!");

• if (timerMinutes == 10) alert("Time Expired!");

What is the purpose of the switch statement?

• To force the flow of control back to the top of a loop

• To exit a loop that would otherwise continue to execute

• To repeat a group of statements for some particular range of values

• To compare a value against other values, to search for a match

Which JavaScript statement is used to force the flow of control back to the top of a loop?

• while

• for

• continue

• break

Consider the following code snippet:

var x = 100; while (x > 5) { x--; }

What will be the value of x after the execution of the given code snippet?

• 4

• 5

• 100

• 6

Which type of statement provides a way to exit a loop that would otherwise continue to execute?

• break

• continue

• for

• while

What is casting in JavaScript?

• Declaring all variables and creating all objects before programming procedures

• Changing a variable from one data type to another

• Repairing corrupted user input

• Creating functions molded to pre-defined algorithms

What is an argument in JavaScript?

• A value passed into a function from outside the function

• A statement that transfers program execution to a subroutine

• A named block of code that can be called

• Any method that returns a value

How does a global variable differ from a local variable?

• You can access a local variable value from any function or <script> block that you define on the HTML page.

• You declare a global variable within a function.

• You declare a local variable outside any function.

• You can access a global variable value from any function or <script> block that you define on the HTML page.