Q
Which variable declaration is appropriate if you want a variable to hold a constant value throughout the program execution?

Answer & Solution

Answer: Option C
Solution:
The const keyword is used to declare constants in JavaScript, ensuring the variable holds a constant value throughout.
Related Questions on Average

Which method is used to convert a string to a number in JavaScript?

A). toString()

B). parseInt()

C). parseFloat()

D). toNumber()

What is the purpose of using the === operator in JavaScript?

A). Strict equality comparison

B). Loose equality comparison

C). Assignment operator

D). Addition operator

Which of the following is NOT a valid variable name in JavaScript?

A). _myVariable

B). 2ndVariable

C). $myVariable

D). my-Variable

What will be the output of the following code: console.log('Hello ' + 'World');?

A). Hello World

B). Hello + World

C). Hello +World

D). HelloWorld

Which data type is used to represent whole numbers in JavaScript?

A). number

B). integer

C). float

D). string

What is the keyword used to declare variables in JavaScript?

A). let

B). variable

C). var

D). const

What happens if you declare a variable without initializing it in JavaScript?

A). It will throw a syntax error

B). It will assign the variable a value of undefined

C). It will automatically assign a value to the variable

D). It will assign the variable a value of null

What is the value of x after the following code executes: let x = 5; x *= 2; x /= 3;?

A). 04-Oct

B). 6666666666667

C). 5

D). undefined

Which statement correctly assigns the value true to a boolean variable isLogged in JavaScript?

A). let isLogged = 'true';

B). let isLogged = true;

C). let isLogged = 1;

D). let isLogged = 0;

Which symbol is used for string concatenation in JavaScript?

A). +

B). -

C). *

D). /