ECMAScript6 Hands-On Fresco Play Final Assessment Answer – Symbols – Destructuring Content – Classes – Arrow Functions
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1.ES6 is the first time that JavaScript has built in models
a. False
b. True
Answer: True.
2.The following are states of promis, except _________.
a. Resolved
b. Rejected
c. Pending
d. Approved
Answer : Approved.
3.Variables declared in scope are accessible ___________.
a. None of the options
b. Anywhere in the program
c. In that scope only
D. In all scope nested inside it
Answer: In all scope nested inside it
4.The bodies of class declaration and a class expression are executed in the strict mode
a. True.
b. False.
Answer: True
5. Maps can be used to store ___________.
a. Relative mapping
b. Hash values
c. Geographical data
D. Key value pairs
Answer: Key value pairs
6. During distruvcturing, you can either declare variables or assign to them, or both
a. True.
b. False.
Answer: False
7.It is always a good practice to physically separate the code based on ____________.
a. Dependency
B. Requirement
c. All the options
d. Functionality
Answer: Functionality
8. Template literals can be reused
a. True.
b. False.
Answer: True
9.ECMAScript is a __________.
a. Language standard
b. Scripting language
c. Programming standard
d.Programming language
Answer: Language standard
10. “Class player extends student”
which of the following is not true about the above line code?
- Student is the parent class
- Student derives the properties of the player class
- Player is the child class
- Player derives the properties of the student class
Answer: Student derives the properties of the player class
11.Arrow functions are less verbose than traditional functions
a. True.
b. False.
Answer: True
12. Which keyword can be used to implement inheritance in ES6?
a. Extends
b. Inherits
c. Derives
d. Implements
Answer: Extends
13. What will be printed if the following code is executed.
let x = 150;
if(x>100) {
x=1
}
Console.log(x) ;
a.1
b. 150
c. error
d. 100
Answer: 1
14.Template literals does not allow us to ________.
a.Build complex HTML and XML templates
b.None of the options
c. Evaluate an expression in template
d. create complex string easily
Answer: None of the options
15. The keyword let allows redeclaring variables
a. True.
b. False.
Answer: False
16. __________ features help us to simplify the inheritance concept
a. Functions
b. Modules
c. Classes
d. Child
Answer: Classes
17.Variables declared with which of the following constructs do not have the block scope
a. Const
b. Let
c. Var
Answer: Const
18.Map can use _______ value as key
a. Location
b. Any
c. String
d.Hash
Answer: Any
19. Which of the following parameter can be used to expand a single array into multiple arguments
a. Rest
b. Spread
c. Default
Answer: Spread
20.Declaring variables with which of the following keyword will make the variable immutable
a. Let
b. Var
c. Const
