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question:Write a shell script that checks if a directory exists, and if not, creates the directory with the given pathname. ~/my_new_directory
answer:#!/bin/sh dir_path="~/my_new_directory" if [ ! -d "dir_path" ]; then mkdir -p "dir_path" echo "Directory created: dir_path" else echo "Directory already exists: dir_path" fi
question:Create a Python function called 'convert_seconds' that takes an integer input for the total number of seconds, and returns a tuple containing hours, minutes, and the remaining seconds.
answer:def convert_seconds(total_seconds): hours = total_seconds // 3600 minutes = (total_seconds % 3600) // 60 seconds = total_seconds % 60 return (hours, minutes, seconds)
question:Explain the purpose of 'import' and 'from' statements in Python and provide an example for each.
answer:'import' in Python is used to load a module into a script, giving you access to its functions, classes, and attributes. Example: import math 'from' is used in conjunction with 'import' to import specific elements from a module, reducing the need to reference the module name each time you use the element. Example: from math import sqrt
question:JavaScript, what is the difference between '==' and '==='? Provide an example of correct usage for each operator.
answer:In JavaScript, '==' checks if the values of two operands are equal, allowing type coercion, meaning that if the operands are of different types, one will be converted to match the other's type. Example: '5' == 5 //returns true '===' checks for strict equality, meaning that it checks if the values and the types of the operands are equal. Example: '5' === 5 //returns false