CoAction Python Developer Experienced

Round 1:

1. What is lambda function ? Answer
2. how to decide if site is crollable or not ?
   

   Answer

   Actually most of the publishers allow programmers to crawl their websites at some extent. In other sense, publishers want specific portions of the websites to be crawled. To define this, websites must put some rules for stating which portions can be crawled and which cannot be. Such rules are defined in a file called robots.txt.

   robots.txt is human readable file used to identify the portions of the website that crawlers are allowed as well as not allowed to scrape. There is no standard format of robots.txt file and the publishers of website can do modifications as per their needs. We can check the robots.txt file for a particular website by providing a slash and robots.txt after url of that website.

3. convert a tuple of natural Numbers to a tuple having each element 5 times
4. which is better and why? between tupple and list. Answer
5. difference between array and list? Answer
6. difference between py2 and py3? Answer
7. difference between tuple and list. Which one should you use and why? Answer
8. With what functions Lambda can be used? Answer
9. difference between range and xrange? Answer
10. benefits of comprehension techniques? Answer

Round 2:

1. Benefit of oracle database package ? Answer
2. What is pickle and unpickle in python ? Answer
3. What is deep copy and shallow copy ? Answer Deep Copy and Shallow Copy
4. What is Oracle data base bitmap index ? Answer
5. What is Oracle data base ref cursor ? Answer
6. What is multithreading in python ?
7. Explain split(), sub(), subn() methods of “re” module in Python.
   

   Answer

   To modify the strings, Python’s “re” module is providing 3 methods. They are:

   split() – uses a regex pattern to “split” a given string into a list. sub() – finds all substrings where the regex pattern matches and then replace them with a different string subn() – it is similar to sub() and also returns the new string along with the no. of replacements.

Round 3:-

How to load a file into database if delimiter is unknown ?

Round 4:-

How to do api integration in python ?

Result : Got selected but didn't join the company.