Primitive Data Mockest | JavaScript

11.

How is the Symbol data type different from other primitive data types in JavaScript?

A). Symbols can be used as object keys B). Symbols can be compared directly C). Symbols can be used in mathematical operations D). Symbols can be concatenated with strings

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12.

What is the result of the expression typeof undefined in JavaScript?

A). number B). string C). undefined D). boolean

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13.

Which primitive data type in JavaScript represents integers and floating-point numbers?

A). Number B). String C). Boolean D). Undefined

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14.

What does the expression typeof "123" return in JavaScript?

A). number B). string C). undefined D). boolean

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15.

Which of the following statements accurately describes the Boolean data type in JavaScript?

A). It represents textual data B). It represents numeric data C). It represents logical values D). It represents an absence of value

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16.

Which of the following statements accurately describes the Boolean data type in JavaScript?

A). It represents textual data B). It represents numeric data C). It represents logical values D). It represents an absence of value

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17.

What does the expression typeof null return in JavaScript?

A). number B). string C). object D). boolean

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18.

Which primitive data type represents variables that have been explicitly set to represent no value?

A). Number B). String C). Undefined D). Null

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19.

How is the Undefined data type different from the Null data type in JavaScript?

A). Undefined represents an intentional absence of value B). Null represents variables not initialized C). Undefined is used for object keys D). Null is used for mathematical operations

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20.

What does the expression typeof Symbol() return in JavaScript?

A). number B). string C). symbol D). boolean

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