In JavaScript, which of the following data types can be declared using let in one statement?

Which of the following statements is true regarding variable naming in one statement?

A). Variable names can contain spaces

B). Variable names must start with a digit

C). Variable names can start with an underscore

D). Variable names must be unique within the statement

Which of the following is a disadvantage of declaring multiple variables in one statement?

A). Increased code readability

B). Difficulty in tracking variable values

C). Limited variable scope

D). Reduced memory usage

What is the behavior of the code let a, b = 5, c = b;?

A). b and c are initialized to 5, a is initialized to undefined

B). a, b, and c are initialized to 5

C). b is initialized to 5, c is initialized to undefined, a is initialized to 5

D). a and c are initialized to 5, b is initialized to undefined

What happens if you declare variables with the same name in one statement?

A). It throws a syntax error

B). It creates separate variables with the same name

C). It assigns the same value to all variables with that name

D). It overwrites the existing variable with the same name

What is the syntax for declaring multiple variables in one statement using the let keyword?

A). let var1, var2, var3;

B). let var1 = value, var2 = value, var3 = value;

C). let var1 = value; let var2 = value; let var3 = value;

D). let (var1, var2, var3);

Consider the code: let a, b, c;. What will console.log(a); output?

A). a

B). undefined

C). null

D). 0

What happens if you declare multiple variables in one statement without initializing them?

A). It throws a syntax error

B). It initializes all variables to 0

C). It initializes all variables to null

D). It initializes all variables to undefined

What is the result of the expression let x = 10, y = x++;?

A). x is 10, y is 11

B). x is 11, y is 10

C). x is 10, y is 10

D). x is 11, y is 11

Which of the following is a benefit of declaring multiple variables in one statement?

A). Improved code organization

B). Reduced code execution time

C). Increased variable scope

D). Limited variable reusability

What is the outcome of the code let x = 10, y = 5, x = 20;?

A). x is 10, y is 5

B). x is 20, y is 5

C). Syntax error due to variable redeclaration

D). x is 20, y is 10