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Top 25 Python Interview Questions Prepared by Experts
1. What is JSON? How would convert JSON data into Python data?
JSON – stands for JavaScript Object Notation. It is a popular data format for storing data in NoSQL databases. Generally JSON is built on 2 structures.
- A collection of <name, value> pairs.
- An ordered list of values. As Python supports JSON parsers, JSON-based data is actually represented as a dictionary in Python. You can convert json data into python using load() of json module.
2. How are the functions help() and dir() different?
These are the two functions that are accessible from the Python Interpreter. These two functions are used for viewing a consolidated dump of built-in functions.
- help() – it will display the documentation string. It is used to see the help related to modules, keywords, attributes, etc.
To view the help related to string datatype, just execute a statement help(str) – it will display the documentation for ‘str, module. ◦ Eg: >>>help(str) or >>>help() – it will open the prompt for help as help> - to view the help for a module, help> module module name Inorder to view the documentation of ‘str’ at the help>, type help>modules str
- to view the help for a keyword, topics, you just need to type, help> “keywords python- keyword” and “topics list”
- dir() – will display the defined symbols. Eg: >>>dir(str) – will only display the defined symbols.
3. Which command do you use to exit help window or help command prompt?
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