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Tutor profile: Vimal R.

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Vimal R.
Software Developer at Cognizant
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Questions

Subject: SQL Programming

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Question:

What is SQL?

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Vimal R.
Answer:

SQL stands for Structured Query Language, and it is used to communicate with the Database. This is a standard language used to perform tasks such as retrieval, update, insertion, and deletion of data from a database. Standard SQL Commands are Select.

Subject: Python Programming

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Question:

What is Python really?

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Vimal R.
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 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 modeling, big data applications and many more. It's also often used as "glue" code to get other languages and components to play nice. Python makes difficult things easy so programmers can focus on overriding algorithms and structures rather than nitty-gritty low-level details.

Subject: Java Programming

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Question:

Can you override a private or static method in Java?

Inactive
Vimal R.
Answer:

You can not override a private or static method in Java if you create a similar method with same return type and same method arguments in child class then it will hide the superclass method, this is known as method hiding. Similarly, you cannot override a private method in subclass because it's not accessible there, what you do is create another private method with the same name in the child class.

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