GAIL Interview Questions and Answers

This program reverses a given string without using any built-in methods.

• Iterate through the string from the last character to the first character.

• Append each character to a new string to reverse the order.

• Return the reversed string as the output.

Find the sum of unique numbers in a list.

• Create an empty set to store unique numbers

• Loop through the list and add each number to the set

• Sum up the numbers in the set

Commonly used inbuilt functions of Python

• print() - prints output to console

• len() - returns length of an object

• range() - generates a sequence of numbers

• type() - returns type of an object

• str() - converts an object to string

• int() - converts a string or float to integer

• float() - converts a string or integer to float

• list() - creates a list

• dict() - creates a dictionary

• set() - creates a set

Count the frequency of keys in a dictionary.

• Use a loop to iterate through the keys in the dictionary.

• For each key, use the count() method to count its frequency.

• Store the key and its frequency in a new dictionary.

Namespace is a way to organize variables and functions in a program to avoid naming conflicts.

• Namespace helps in avoiding naming conflicts by providing a unique space for each identifier.

• Types of namespaces include global namespace, local namespace, built-in namespace, and module namespace.

• Example: In Python, each module has its own namespace where all the variables and functions defined in that module reside.

Lambda function is an anonymous function defined using the lambda keyword in Python.

• Lambda functions are used for creating small, one-time use functions without a name.

• Syntax: lambda arguments: expression

• Example: double = lambda x: x * 2

Multiple inheritance in Python allows a class to inherit attributes and methods from more than one parent class.

• Python supports multiple inheritance by allowing a class to inherit from multiple parent classes.

• The order of parent classes in the inheritance list matters, as methods are searched for in the order they appear.

• Diamond problem can occur in multiple inheritance when two parent classes have a common ancestor class.

• Super() function can be used to call methods from pare...read more