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AfterAcademy Tech

Idea of Dynamic Programming

Dynamic Programming is one of the most commonly used approach of problem-solving during coding interviews. We will discuss how can we approach to a problem using Dynamic Programming and also discuss the concept of Time-Memory Trade-Off.

07 Jan 2020

AfterAcademy Tech

What is the difference between Primary key and Unique key?

In this blog, we will learn what are unique keys and what is the need for unique keys. We will also discuss various points on which the unique key differ from a primary key.

07 Jan 2020

AfterAcademy Tech

Container With Most Water

Find two lines, which together with x-axis forms a container, such that the container contains the most water.

05 Jan 2020

AfterAcademy Tech

What are Super key, Primary key, Candidate key, and Foreign keys?

In this blog, we will learn about the various keys like the super key, candidate key, primary key, alternate key and foreign key. We will discuss how to identify and differentiate between them with examples.

05 Jan 2020

AfterAcademy Tech

Minimum Coin Change-Interview Problem

This is an interview problem based on the concept of dynamic programming. This question has been asked in various companies. We are dealing with solutions based on recursion, memorization and dynamic programming.

02 Jan 2020

AfterAcademy Tech

Print All Subsets of a given set

Given an array of distinct integers S, return all possible subsets. The set is not necessarily sorted and the total number of subsets of a given set of size n is equal to 2^n.

31 Dec 2019

AfterAcademy Tech

What are the different types of network?

In this blog, we will learn about the various classification of networks based on their geographical area, media used, ownership, and functionality.

30 Dec 2019

AfterAcademy Tech

What is an attribute?

In this blog, we will learn what is an attribute, its various types and symbols used to represent them. We will see various types of attributes such as single & multi-valued attributes, simple & composite attribute, stored & derived attribute and key attribute.

30 Dec 2019

AfterAcademy Tech

What is the degree of relation in DBMS?

In this blog, we will learn about the degree of relationship in DBMS. We will also see what are its types depending upon various degree possible and discuss what is the maximum and minimum degree possible in relation.

30 Dec 2019

AfterAcademy Tech

Reverse a Linked List from position M to N

This is an interview problem asked in companies like Amazon, Facebook and Microsoft. The problem is to reverse a linked list from position m to n and print the reversed linked list.

27 Dec 2019