One Statement, Many Variables Mockest | JavaScript

1.

What does the term "One Statement, Many Variables" refer to in JavaScript?

A). Declaring multiple variables with different data types in one statement B). Initializing multiple variables with the same value in one statement C). Declaring multiple variables with the same data type in one statement D). Assigning multiple values to one variable in one statement

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2.

Which keyword is commonly used to declare multiple variables in one statement in JavaScript?

A). multi B). var C). multi D). let

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3.

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);

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4.

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

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5.

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

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6.

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

A). a B). undefined C). null D). 0

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7.

What is the purpose of initializing multiple variables with the same value in one statement?

A). To save memory B). To ensure all variables have the same value C). To increase code complexity D). To reduce typing

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8.

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

A). Number B). String C). Object D). All of the above

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9.

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

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10.

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

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One Statement, Many Variables Mocktest

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