6 Questions
In programming, what is the purpose of a "closure"?
To encapsulate data within a function.
Which of the following JavaScript data types is not considered a primitive type?
Array
What is the difference between "null" and "undefined" in JavaScript?
"Null" indicates the absence of a value, while "undefined" means a variable has been declared but not assigned a value.
In CSS, what is the purpose of the "z-index" property?
To control the vertical stacking order of elements that overlap.
In SQL, what does the "JOIN" clause do? A. B. C. D.
Combines rows from two or more tables based on a related column between them.
In Node.js, what is the purpose of the "cluster" module?
To manage and distribute tasks across multiple CPU cores for improved performance.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
