Question 1

Identify a method that is used to create a subarray.

Accepted Answer

A)   ​concat() 
B)   ​slice() 
C)   ​assert() 
D)   ​sort()  B

Question 2

_________ is a number associated with each individual value in an array and distinguishes each value from other values in the array.

Accepted Answer

​Index

Question 3

A _________ is an operator that compares the value of one expression to another returning a Boolean value indicating whether the comparison is true or not.

Accepted Answer

comparison operator​

Question 4

Briefly explain the process of using arrays as data stacks.

Accepted Answer

The answer of Briefly explain the process of using arrays...

Question 5

Identify the letter of the choice that best matches the phrase or definition.
-This method removes the first item from an array.

Accepted Answer

A)   array.unshift(values) 
B)   array.toString() 
C)   pop() 
D)   concat(array1,array2,...) 
E)   sort() F)  copyWithin(target,start[,end]) G)  join(separator) H)  shift() I)  reverse() J) push(values)

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

Question 7

Identify the output of the following code.
Var x = [3,45,1234,24];
X.sort();

Accepted Answer

A)   ​1234,24,3,45
B)   ​3,24,45,1234
C)   ​1234,45,24,3
D)   ​1234,24,45

Question 8

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

Accepted Answer

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

Question 9

Which of the following methods creates a new array populated with the elements of array that return a value of true from the callback function?

Accepted Answer

A)   ​array.every(callback [,thisArg]) 
B)   ​array.filter(callback [,thisArg]) 
C)   ​array.some(callback [,thisArg]) 
D)   ​array.find(callback [,thisArg])

Question 10

Increasing the value of the length property adds more items to an array,but the items have null values until they are defined.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following determines the current size of an array?

Accepted Answer

A)   ​array(length) 
B)   ​array[length]
C)   ​array.length
D)   ​array::length

Question 12

Describe the structure of the if else statement.

Accepted Answer

The answer of Describe the structure of the if else...

Question 13

Identify a method that extracts array items that match a specified condition.

Accepted Answer

A)   ​sort() 
B)   ​filter() 
C)   ​splice() 
D)   ​reverse()

Question 14

By default,items are placed in an array either in the order in which they are defined or explicitly by index number.

Accepted Answer

A) True 
 B)False

Question 15

In an if loop,a variable known as a counter variable is used to track the number of times a block of commands is run.

Accepted Answer

A) True 
 B)False

Question 16

The _____ operator tests whether two items are equal in value and have the same data type.

Accepted Answer

A)   ​= =
B)   ​= = =
C)   ​=
D)   ​!=

Question 17

Identify the letter of the choice that best matches the phrase or definition.
-This method links all items in the array into a single text string.

Accepted Answer

A)   array.unshift(values) 
B)   array.toString() 
C)   pop() 
D)   concat(array1,array2,...) 
E)   sort() F)  copyWithin(target,start[,end]) G)  join(separator) H)  shift() I)  reverse() J) push(values)

Question 18

Identify the expression used to reference array values.

Accepted Answer

A)   ​array() 
B)   ​array[i]
C)   ​array{array1,array2,…}
D)   ​array::values

Question 19

Which of the following functions increases the value of each item in an array by 1?

Accepted Answer

A)   ​sum() 
B)   ​AddArray() 
C)   ​StepUp() 
D)   ​ceil()

Question 20

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

Exam 10: Exploring Arrays, loops, and Conditional Statements

Identify a method that is used to create a subarray.

_________ is a number associated with each individual value in an array and distinguishes each value from other values in the array.

A _________ is an operator that compares the value of one expression to another returning a Boolean value indicating whether the comparison is true or not.

Briefly explain the process of using arrays as data stacks.

Identify the letter of the choice that best matches the phrase or definition. -This method removes the first item from an array.

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 the output of the following code. Var x = [3,45,1234,24]; X.sort() ;

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

Which of the following methods creates a new array populated with the elements of array that return a value of true from the callback function?

Increasing the value of the length property adds more items to an array,but the items have null values until they are defined.

Which of the following determines the current size of an array?

Describe the structure of the if else statement.

Identify a method that extracts array items that match a specified condition.

By default,items are placed in an array either in the order in which they are defined or explicitly by index number.

In an if loop,a variable known as a counter variable is used to track the number of times a block of commands is run.

The _____ operator tests whether two items are equal in value and have the same data type.

Identify the letter of the choice that best matches the phrase or definition. -This method links all items in the array into a single text string.

Identify the expression used to reference array values.

Which of the following functions increases the value of each item in an array by 1?

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