NYC Codecademy Group - JavaScript Quiz

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| By Ronantopolski

Ronantopolski

Community Contributor

Quizzes Created: 1 | Total Attempts: 342

Questions: 17 | Attempts: 343 | Updated: Mar 21, 2023

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This quiz will test your knowledge of JavaScript.

Good Luck!
-Ron

Questions and Answers

1.

Var numbers = [1, 2, 3] is an example of:
- A.
  
  Array
- B.
  
  Function
- C.
  
  Object
- D.
  
  Method
Correct Answer
A. Array

Explanation
An array is a special variable which can hold more than one value at a time.
See Codecademy lesson

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2.

Var = myName is an example of a
- A.
  
  Variable
- B.
  
  String
- C.
  
  Object
- D.
  
  Method
Correct Answer
A. Variable

Explanation
variables are used to hold values or expressions

See Codecademy lesson

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3.

Select which of the options below are data types
- A.
  
  Number
- B.
  
  String
- C.
  
  Function
- D.
  
  Boolean
Correct Answer(s)
A. Number
B. String
D. Boolean

Explanation
The three data types are number, string and Boolean.

See Codecademy lesson

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4.

I++
- A.
  
  Incrementor
- B.
  
  Operator
- C.
  
  Iterator
- D.
  
  Decrementor
Correct Answer
A. Incrementor

Explanation
Incrementors/Decrementors are used to increase/reduce the value of a variable by 1
See Codecademy lesson

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5.

Var i; for (i = 0; i < 2; i++) { console.log("i is now equal to " + i);
- A.
  
  Function
- B.
  
  Object
- C.
  
  For Loop
- D.
  
  While Loop
Correct Answer
C. For Loop

Explanation
In JavaScript, there are two different kind of loops:
for - loops through a block of code a specified number of times
while - loops through a block of code while a specified condition is true
See Codecademy lesson

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6.

is an example of a
- A.
  
  Method
- B.
  
  Object
- C.
  
  Function
- D.
  
  Variable
Correct Answer
C. Function

Explanation
A function contains code that will be executed by an event or by a call to the function.

See Codecademy lesson:

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7.

Var i = 0; while ( i < 2 ) { console.log( "i is now " + i ); i++; }
- A.
  
  While Loop
- B.
  
  Incrementor
- C.
  
  For Loop
- D.
  
  Function
Correct Answer
A. While Loop

Explanation
In JavaScript, there are two different kind of loops:

for - loops through a block of code a specified number of times
while - loops through a block of code while a specified condition is true

See Codecademy lesson

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8.

if (name.length > 0) { console.log("Please enter your name."); } else { console.log("Hello " + name); } is an example of:
- A.
  
  If Statement
- B.
  
  If...Else Statement
- C.
  
  Else If Statement
- D.
  
  Switch Statement
Correct Answer
B. If...Else Statement

Explanation
If the condition (name.length>0) is true, statement1 will be executed. Otherwise, statement2 will be executed.
See Codecademy lesson

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9.

switch (GPA){ case 90: letterGrade = "A+"; break; case 80: letterGrade = "A"; break; case 70: letterGrade = "C"; break; case 60: letterGrade = "D"; break; case 50: letterGrade = "E"; break; default: letterGrade = "F"; break; }
- A.
  
  If...Else Statement
- B.
  
  Ternary Operator
- C.
  
  Else If Statement
- D.
  
  Switch Statement
Correct Answer
D. Switch Statement

Explanation
Switch statements are a shorthand way to write if else statements when there are many different cases, and each case has a different outcome.
See Codecademy lesson

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10.

is an example of
- A.
  
  If statement
- B.
  
  If...Else Statement
- C.
  
  Switch Statement
- D.
  
  Ternary Operator
Correct Answer
D. Ternary Operator

Explanation
Ternary operators are a shorthand way of writing if else statements.
See Codecademy lesson

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11.

For the object below, what does the word 'name' represent? var dog = {name: "Daisy", age: 6};
- A.
  
  Property
- B.
  
  Variable
- C.
  
  Value
- D.
  
  String
Correct Answer
A. Property

Explanation
In this object, 'name' is a property. A property is a type of information that describes the object and is always paired with a value.
Objects can written in two different ways, depending on how the properties are defined within them:

1. Object Literal Notation:

2. Object Constructor Notation

In addition to representing properties in two different ways when creating an object, you can also access properties two different ways:

1. Dot Notation

2. Bracket Notation:

See Codecademy lesson

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12.

Var dog = (); dog.name = "Daisy"; dog.age = 6; is an example of creating an object using:
- A.
  
  Object Literal Notation
- B.
  
  Object Constructor Notation
- C.
  
  Dot Notation
- D.
  
  Bracket Notation
Correct Answer
B. Object Constructor Notation

Explanation
Objects can written in two different ways, depending on how the properties are defined within them:

1. Object Literal Notation:

2. Object Constructor Notation

In addition to representing properties in two different ways when creating an object, you can also access properties two different ways:

1. Dot Notation

2. Bracket Notation:

See Codecademy lesson

Rate this question:
13.

is an example of creating an object using:
- A.
  
  Dot Notation
- B.
  
  Object Literal Notation
- C.
  
  Bracket Notation
- D.
  
  Object Constructor Notation
Correct Answer
B. Object Literal Notation

Explanation
Objects can written in two different ways, depending on how the properties are defined within them:

1. Object Literal Notation:

2. Object Constructor Notation

In addition to representing properties in two different ways when creating an object, you can also access properties two different ways:

1. Dot Notation

2. Bracket Notation:

See Codecademy lesson

Rate this question:
14.

Var dogName = dog.name is an example of accessing an object's property using:
- A.
  
  Dot Notation
- B.
  
  Bracket Notation
- C.
  
  Object Literal Notation
- D.
  
  Object Constructor Notation
Correct Answer
A. Dot Notation

Explanation
When you access a property, you are setting a variable equal to the the value of a property in a particular object.

In this example, we are setting variable dogName equal to the value of the 'name' property of the 'dog' object.

See Codecademy lesson

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15.

is an example of accessing an object's property using:
- A.
  
  Object Literal Notation
- B.
  
  Bracket Notation
- C.
  
  Dot Notation
- D.
  
  Object Literal Notation
Correct Answer
B. Bracket Notation

Explanation
When you access a property, you are setting a variable equal to the the value of a property in a particular object.

In this example, we are setting variable dogName equal to the value of the 'name' property of the 'dog' object.

See Codecademy lesson

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16.

is an example of a:
- A.
  
  Method
- B.
  
  Variable
- C.
  
  Object
- D.
  
  Function
Correct Answer
D. Function

Explanation
A function contains code that will be executed by an event or by a call to the function. In this case, we would call the function by writing a command: hello(); which would display the text "i am saying hello" in the console.

See Codecademy lesson

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17.

In the function below, what does the text '(w, l)' represent? var area = function (w, l) { return w * l; };
- A.
  
  Variables
- B.
  
  Parameters
- C.
  
  Strings
- D.
  
  Object
Correct Answer
B. Parameters

Explanation
A parameter is a variable that is processed by the function to generate a given result. In this case, if we run the function as follows: area(2,3); we will get a result of 6. To further clarify, parameters are the variables in the declaration of a function (w,l) while arguments are the specific values that get passed when running the function (2,3)

See Codecademy lesson

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Current Version
Mar 21, 2023

Quiz Edited by
ProProfs Editorial Team
Jun 02, 2012

Quiz Created by
Ronantopolski

NYC Codecademy Group - JavaScript Quiz

Var numbers = [1, 2, 3] is an example of:

Var = myName is an example of a

Select which of the options below are data types

I++

Var i; for (i = 0; i < 2; i++) { console.log("i is now equal to " + i);

is an example of a

Var i = 0; while ( i < 2 ) { console.log( "i is now " + i ); i++; }

if (name.length > 0) { console.log("Please enter your name."); } else { console.log("Hello " + name); } is an example of:

switch (GPA){ case 90: letterGrade = "A+"; break; case 80: letterGrade = "A"; break; case 70: letterGrade = "C"; break; case 60: letterGrade = "D"; break; case 50: letterGrade = "E"; break; default: letterGrade = "F"; break; }

is an example of

For the object below, what does the word 'name' represent? var dog = {name: "Daisy", age: 6};

Var dog = (); dog.name = "Daisy"; dog.age = 6; is an example of creating an object using:

is an example of creating an object using:

Var dogName = dog.name is an example of accessing an object's property using:

is an example of accessing an object's property using:

is an example of a:

In the function below, what does the text '(w, l)' represent? var area = function (w, l) { return w * l; };