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Tutor profile: Kapil S.

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Kapil S.
Tutor for 4 years and SDE in AMAZON
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Questions

Subject: Python Programming

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Question:

What is Python really?

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Kapil S.
Answer:

Python is an interpreted language. That means that, unlike languages like C and its variants, Python does not need to be compiled before it is run. Other interpreted languages include PHP and Ruby. Python is dynamically typed, this means that you don't need to state the types of variables when you declare them or anything like that. You can do things like x=111 and then x="I'm a string" without error Python is well suited to object orientated programming in that it allows the definition of classes along with composition and inheritance. Python does not have access specifiers (like C++'s public, private), the justification for this point is given as "we are all adults here" in Python, functions are first-class objects. This means that they can be assigned to variables, returned from other functions and passed into functions. Classes are also first class objects Writing Python code is quick but running it is often slower than compiled languages. Fortunately, Python allows the inclusion of C based extensions so bottlenecks can be optimised away and often are. The numpy package is a good example of this, it's really quite quick because a lot of the number crunching it does isn't actually done by Python Python finds use in many spheres - web applications, automation, scientific modelling, big data applications and many more. It's also often used as "glue" code to get other languages and components to play nice.

Subject: C++ Programming

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Question:

malloc() vs new

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Kapil S.
Answer:

Following are the differences between malloc() and operator new. 1) new calls constructors, while malloc() does not. In fact primitive data types (char, int, float.. etc) can also be initialized with new 2) new is an operator, while malloc() is a fucntion. 3) new returns exact data type, while malloc() returns void *.

Subject: C Programming

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Question:

Data Types in C

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Kapil S.
Answer:

Each variable in C has an associated data type. Each data type requires different amounts of memory and has some specific operations which can be performed over it. Let us briefly describe them one by one: Following are the examples of some very common data types used in C: char: The most basic data type in C. It stores a single character and requires a single byte of memory in almost all compilers. int: As the name suggests, an int variable is used to store an integer. float: It is used to store decimal numbers (numbers with floating point value) with single precision. double: It is used to store decimal numbers (numbers with floating point value) with double precision. Different data types also have different ranges upto which they can store numbers. These ranges may vary from compiler to compiler. Below is list of ranges along with the memory requirement and format specifiers on 32 bit gcc compiler.

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