Q
How do you concatenate strings in JavaScript?

Answer & Solution

Answer: Option A
Solution:
In JavaScript, you can concatenate strings using the + operator. When you use the + operator between two strings, they are concatenated to form a new string. For example, 'Hello' + 'World' will result in 'HelloWorld'. Therefore, option A is correct for concatenating strings in JavaScript.
Related Questions on Average

What is the purpose of the 'this' keyword in JavaScript?

A). To refer to the current HTML element

B). To refer to the current JavaScript file

C). To refer to the current object

D). To refer to the current function

What is the purpose of the 'continue' statement in a JavaScript loop?

A). To exit the loop

B). To skip the current iteration

C). To restart the loop

D). To execute the loop body again

What is the correct way to declare a JavaScript class?

A). class Rectangle {}

B). let Rectangle = {}

C). function Rectangle() {}

D). Rectangle {}

What is the correct way to declare a variable in JavaScript?

A). var x = 10;

B). let x = 10;

C). const x = 10;

D). variable x = 10;

How can you comment a single line of code in JavaScript?

A). // This is a comment

B). <!-- This is a comment -->

C). /* This is a comment */

D). ''' This is a comment '''

How can you add a new element to the end of a JavaScript array?

A). colors.push('blue');

B). colors.add('blue');

C). colors.insert('blue', colors.length);

D). colors[colors.length] = 'blue';

Which statement correctly declares a JavaScript object?

A). let person = {name: 'John', age: 30};

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C). const person = ['name', 'John', 'age', 30];

D). var person = {name: 'John', age: 30};

What is the purpose of the 'return' statement in a JavaScript function?

A). To end the function execution

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A). const add = (a, => a + b;

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How do you access the last element of a JavaScript array?

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B). colors.last();

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