a)Which one of the following is the correct extension of the Python file? A..py  B..python C..p D.None of these b)What do we use to define a block of code in Python language? A.Key B.Brackets C.Indentation D.None of these c)Which character is used in Python to make a single line comment? A./ B.// C.# D.! d)Which of the following declarations is incorrect? A._x = 2 B.__x = 3 C.__xyz__ = 5 D.None of these e)Which of the following operators is the correct option for power(ab)? A.a ^ b B.a**b C.a ^ ^ b D.a ^ * b

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Concept of memory addresses in pointers

The concept of pointers in high-level languages was introduced in C programming. Pointers are simply the variables that are used to store memory addresses of another variable. These special variables are generally used in the languages such as C Programming and C++ Programming, where it allows the programmer to work more deeply with memory and its addresses.