JavaScript Functions
JavaScript Functions - Important Points
31. | What is the purpose of the "bind" method in JavaScript? |
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A. To create a new function with a specified "this" value and arguments provided as an array
B. To call a function with a specified "this" value and arguments provided as individual arguments
C. To bind a function to a specific "this" value
D. To create a new object with a specified prototype object and properties
View Answer Discuss Work SpaceAnswer: option c
Explanation:
32. | What is the difference between "call" and "apply" methods in JavaScript? |
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A. There is no difference between "call" and "apply"
B. Call method accepts an array of arguments, while "apply" method accepts individual arguments
C. Call method accepts individual arguments, while "apply" method accepts an array of arguments
D. Call method is used for asynchronous functions, while "apply" method is used for synchronous functions
View Answer Discuss Work SpaceAnswer: option c
Explanation:
33. | What is a closure in JavaScript? |
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A. A function that is called at the end of a program's execution
B. A function that is called when an event occurs
C. A function that is passed as an argument to another function
D. A combination of a function and the lexical environment in which it was declared
View Answer Discuss Work SpaceAnswer: option d
Explanation:
34. | What is a higher-order function in JavaScript? |
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A. A function that returns a boolean value
B. A function that takes another function as an argument or returns a function as a result
C. A function that performs a specific task
D. A function that is called when an event occurs
View Answer Discuss Work SpaceAnswer: option b
Explanation:
35. | What is the purpose of the "this" keyword in JavaScript? |
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A. To refer to the current object
B. To refer to the previous object
C. To refer to the next object
D. To refer to a global variable
View Answer Discuss Work SpaceAnswer: option a
Explanation: