Collection Framework  Interview In Java? Q1) What is Iterable Interface In Java? Q2) What is the difference between Collections and Collection? Q3) Which is faster to access ArrayList or LinkedList? Q4) Which is faster ArrayList or Vector? Q5) How to create Synchronized ArrayList? Q6) What is hashCode() in Java, how to get the hashcode of Object? Q7) Difference between Iterator and ListIterator? Q8)  What is Comparable and Comparator Interface in Java? Q9)  What is the difference between Hashtable and HashMap? Q10)  Difference between LIST and Set? Q11)  What is the difference between Set and MAP? Q12)  What is Queue Interface In java? Q13)  What is Priority Queue and Abstract Queue in Java?                         

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Many developers do a common mistake in the Django application that he provide a logout option but not write the code to disable the back button then anyone again enters into the system. This limitation can be solved by the Django session object and clear cache reference of internal pages. In this example, I am explaining the complete code of the Login, Logout, and Disable Back button for Index and Course Method. Django provides the following decorator to clear the cache @cache_control(no_cache=True, must_revalidate=True, no_store=True) Code of Model Class:- from django.db import models class Student(models.Model): rno= models.IntegerField() sname=models.CharField(max_length=50) branch=models.CharField(max_length=20) fees = models.FloatField() def __str__(self): return "rno is "+str(self.rno)+ " sname is "+self.sname + " branch is "+self.branch+ "fees is "+str(self.fees) class Course(models.Model): courseid=models.IntegerField() c...