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Which function is used to write output to the console in Python?
A. echo()
B. System.out.println()
C. print()
D. write()
Answer: print()
In Java, which operator is used to compare object references?
A. ==
B. .equals()
C. =
D. !=
Answer: ==
What is the default value of a string in C++?
A. null
B. 0
C. empty string
D. undefined
Answer: empty string
In JavaScript, which keyword is used to declare a variable?
A. var
B. let
C. const
D. All of the above
Answer: All of the above
Which of the following languages is commonly used for system programming?
A. Python
B. C
C. HTML
D. JavaScript
Answer: C
Which of the following is not a looping structure in Python?
A. for
B. while
C. do-while
D. foreach
Answer: do-while
Which operator is used to concatenate two strings in Python?
A. +
B. &
C. *
D. ++
Answer: +
Which of the following is a method used to iterate over elements of an array in JavaScript?
A. forEach()
B. loop()
C. iterate()
D. run()
Answer: forEach()
In JavaScript, which method is used to add a new element to an array?
A. push()
B. append()
C. insert()
D. add()
Answer: push()