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In Python, which of the following is used to check if a key exists in a dictionary?
A. in
B. exists
C. key()
D. find()
Answer: in
In Python, how do you add an element to the end of a list?
A. append()
B. push()
C. add()
D. insert()
Answer: append()
In C++, which keyword is used to prevent a method from being overridden?
A. const
B. final
C. static
D. private
Answer: final
Which of the following is a mutable data type in Python?
A. tuple
B. string
C. list
D. int
Answer: list
Which keyword is used to import modules in Python?
A. require
B. include
C. import
D. use
Answer: import
Which of the following methods is used to remove the last element of an array in JavaScript?
A. remove()
B. pop()
C. delete()
D. splice()
Answer: pop()
In Java, what does the ‘final’ keyword mean when applied to a variable?
A. It cannot be changed once assigned
B. It can only be changed once
C. It can be inherited
D. It must be initialized
Answer: It cannot be changed once assigned
Which operator is used to access properties of an object in JavaScript?
A. .
B. ->
C. :
D. []
Answer: .
In JavaScript, which symbol is used for strict equality comparison?
A. ===
B. ==
C. =
D. !==
Answer: ===