Test your JavaScript Skills:Fundamentals-5

Introduction

Namaste, In this blog I will discuss 7 FAQs on Javascript fundamentals.

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1. Identify the output of the below program

    let $=20;
    console.log("value", $);
   

   a.error

   b.20

   c.undefined

   d. null

   e.no output

   Answer:b

   Reason: $ is a valid variable name.

2. Identify the output of the below program

    let _=100;
    console.log("value", _);
   

   a.error

   b.null

   c.undefined

   d. 100

   e.no output

   Answer:d

   Reason: _ is a valid variable name.

3. Identify the output of the below program

    let ರಾಮ್ = "Ram";
    console.log("value", ರಾಮ್);
   

   a.error

   b.undefined

   c.Ram

   d. null

   e.no output

   Answer:c

   Reason: ರಾಮ್ is a valid variable name.

4. Identify the output of the below program

    let राम = "Ram";
    console.log("value", राम);
   

   a.Ram

   b.error

   c.undefined

   d. null

   e.no output

   Answer: a

   Reason: राम is a valid variable name.

5. Identify the output of the below program

    let class= "JS";
    console.log("value", class);
   

   a.JS

   b.class

   c.error

   d. undefined

   e.null

   Answer: c

   Reason: Here class is a reserved word, reserved words cannot be used as variables.

6. Identify the output of the below program

    let function = 10;
    console.log("value", function);
   

   a.error

   b.10

   c.undefined

   d. null

   e.no output

   Answer: a

   Reason: Here function is a reserved word.Cannot use reserved words as variable names.

7. Identify the output of the below program

    let राम = "Ram";
    console.log("type", typeof राम);
   

   a.error

   b.string

   c.null

   d. undefined

   e.no output

   Answer:b

   Reason: Since राम is a valid variable and holds string data the type is a string.

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