Question 1

Explain the length property of an array with examples.

Accepted Answer

A JavaScript array automatically expands

Question 2

A command block is indicated by its opening and closing square brackets [ ].

Accepted Answer

A) True 
 B)False

Question 3

The _____ method diminishes array from the last element by keeping only those items that return a value of true from the callback function.

Accepted Answer

A)  array .every( callback [, thisArg ]) 
B)  array .map( callback [, thisArg ]) 
C)  array .reduceRight( callback [, thisArg ]) 
D)  array .findIndex( callback [, thisArg ]) 
A)  array .every( callback [, thisArg ]) 
B)  array .map( callback [, thisArg ]) 
C)  array .reduceRight( callback [, thisArg ]) 
D)  array .findIndex( callback [, thisArg ])

Question 4

Match between columns
                        Premises: This method converts the contents of an array to a text sequence with the array values in a comma-separated list.
This method links all items in the array into a single text string.
This method inserts new items at the start of an array.
This method rearranges array items in alphabetical order.
This method appends an array with new items.
This method removes the last item from an array.
This method inverts the order of items in an array.
This method duplicates items within an array.
This method removes the first item from an array.
This method joins the array to two or more arrays, creating a single array containing the items from all the arrays.

Accepted Answer

The Answer of push(values and sort() and array.unshift(values) and join(separator) is...

Question 5

Identify a true statement of array .find( callback [, thisArg ]) method.

Accepted Answer

A)  It tests whether the condition returned by the callback function holds for at least one item in array . 
B)  It returns the value of the first element in the array that passes a test in the callback function. 
C)  It tests whether the condition returned by the callback function holds for all items in array . 
D)  It returns the index of the first element in the array that passes a test in the callback function. 
A)  It tests whether the condition returned by the callback function holds for at least one item in array . 
B)  It returns the value of the first element in the array that passes a test in the callback function. 
C)  It tests whether the condition returned by the callback function holds for all items in array . 
D)  It returns the index of the first element in the array that passes a test in the callback function.

Question 6

What is the output of the following code? var x = [4, 7, 11]; x.forEach(stepUp); function stepUp(value, i, arr) { arr[i] = value + 1; }

Accepted Answer

A)  4, 7, 11 
B)  3, 7, 11 
C)  5, 8, 12 
D)  8, 14, 22 
A)  4, 7, 11 
B)  3, 7, 11 
C)  5, 8, 12 
D)  8, 14, 22

Question 7

Identify a method that inserts new items at the front of an array.

Accepted Answer

A)  reverse() 
B)  unshift() 
C)  assert() 
D)  sort() 
A)  reverse() 
B)  unshift() 
C)  assert() 
D)  sort()

Question 8

Identify the syntax of the while loop.

Accepted Answer

A)  while ( continue ) { commands } 
B)  while ( start ) { commands } 
C)  while [ start;stop ] { commands } 
D)  while [ update ; continue ] { commands } 
A)  while ( continue ) { commands } 
B)  while ( start ) { commands } 
C)  while [ start;stop ] { commands } 
D)  while [ update ; continue ] { commands }

Question 9

For array data that should be treated as a queue, the _____ method is used, which is similar to the pop() method except that it removes the first array item and not the last.

Accepted Answer

A)  reverse() 
B)  shift() 
C)  assert() 
D)  sort() 
A)  reverse() 
B)  shift() 
C)  assert() 
D)  sort()

Question 10

What is the output of the following code? var sum = 0; var x = [1, 3, 7, 11]; x.forEach(sumArray); function sumArray(value) { sum += value; }

Accepted Answer

A)  0 
B)  231 
C)  11 
D)  22 
A)  0 
B)  231 
C)  11 
D)  22

Question 11

Briefly explain the process of using arrays as data stacks.

Accepted Answer

Arrays can be used to store information

Question 12

Numeric data can be sorted by creating a(n) _____ function that contrasts the values of two adjacent array items.

Accepted Answer

A)  sum 
B)  iteration 
C)  assert 
D)  compare 
A)  sum 
B)  iteration 
C)  assert 
D)  compare

Question 13

The _____ loop tests the condition to continue the loop right after the latest command block is run.

Accepted Answer

A)  do/while 
B)  while 
C)  for 
D)  forEach 
A)  do/while 
B)  while 
C)  for 
D)  forEach

Explain the length property of an array with examples.

A command block is indicated by its opening and closing square brackets [ ].

The _____ method diminishes array from the last element by keeping only those items that return a value of true from the callback function.

Identify a true statement of array .find( callback [, thisArg ]) method.

What is the output of the following code? var x = [4, 7, 11]; x.forEach(stepUp); function stepUp(value, i, arr) { arr[i] = value + 1; }

Identify a method that inserts new items at the front of an array.

Identify the syntax of the while loop.

For array data that should be treated as a queue, the _____ method is used, which is similar to the pop() method except that it removes the first array item and not the last.

What is the output of the following code? var sum = 0; var x = [1, 3, 7, 11]; x.forEach(sumArray); function sumArray(value) { sum += value; }

Briefly explain the process of using arrays as data stacks.

Numeric data can be sorted by creating a(n) _____ function that contrasts the values of two adjacent array items.

The _____ loop tests the condition to continue the loop right after the latest command block is run.

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Designing a Page Layout Tutorial

Graphic Design With Css Tutorial

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Designing a Web Form Tutorial

Enhancing a Website With Multimedia Tutorial

Getting Started With Javascript Tutorial

Working With Events and Styles Tutorial

Working With Document Nodes and Style Sheets Tutorial

Programming for Web Forms Tutorial

Exploring Object-Based Programming

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Exam 10: Exploring Arrays Loops and Conditional Statements Tutorial

Explain the length property of an array with examples.

A command block is indicated by its opening and closing square brackets [ ].

The _____ method diminishes array from the last element by keeping only those items that return a value of true from the callback function.

Identify a true statement of array .find( callback [, thisArg ]) method.

What is the output of the following code? var x = [4, 7, 11]; x.forEach(stepUp); function stepUp(value, i, arr) { arr[i] = value + 1; }

Identify a method that inserts new items at the front of an array.

Identify the syntax of the while loop.

For array data that should be treated as a queue, the _____ method is used, which is similar to the pop() method except that it removes the first array item and not the last.

What is the output of the following code? var sum = 0; var x = [1, 3, 7, 11]; x.forEach(sumArray); function sumArray(value) { sum += value; }

Briefly explain the process of using arrays as data stacks.

Numeric data can be sorted by creating a(n) _____ function that contrasts the values of two adjacent array items.

The _____ loop tests the condition to continue the loop right after the latest command block is run.

Getting Started With Html5

Getting Started With Css Tutorial

Designing a Page Layout Tutorial

Graphic Design With Css Tutorial

Designing for the Mobile Web Tutorial

Working With Tables and Columns Tutorial

Designing a Web Form Tutorial

Enhancing a Website With Multimedia Tutorial

Getting Started With Javascript Tutorial

Working With Events and Styles Tutorial

Working With Document Nodes and Style Sheets Tutorial

Programming for Web Forms Tutorial

Exploring Object-Based Programming

Filters