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AfterAcademy Tech

What is an Entity, Entity Type and Entity Set?

In this blog, we will learn what is an entity, entity type and entity set and how these terms are related. We will learn the difference between these terms as these terms are often used interchangeably. We will take various examples to understand this.

23 Dec 2019

AfterAcademy Tech

Climbing Stairs - Interview Problem

There is a staircase of N steps and you can climb either 1 or 2 steps at a time. You need to count and return the total number of unique ways you can climb the staircase. The order of steps taken matters.

20 Dec 2019

AfterAcademy Tech

What is the difference between iteration and recursion?

Iteration and Recursion are programming methodologies with similar objective and thus one might seem trivial compared to another, but that's not the case. We will be discussing the important differences between iteration and recursion and how both are useful.

19 Dec 2019

AfterAcademy Tech

What is an E-R model?

In this blog, we will see how an ER model is used in database designing. We will also see how an ER model is made using various components of the ER diagram. We will also discuss the features of an ER model along with its advantages and disadvantages.

19 Dec 2019

AfterAcademy Tech

Spiral Order Traversal of a Matrix

Given a matrix or a 2-d array, you have to traverse the matrix in a spiral order. This is an interview question asked by companies like Microsoft and Amazon.

19 Dec 2019

AfterAcademy Tech

Maximum path sum in a binary tree

Given a non-empty binary tree, find maximum path sum. For this problem, a path is defined as any sequence of nodes from some starting node to any node in the tree along with the parent-child connections.

19 Dec 2019

AfterAcademy Tech

What is the two pointer technique?

Two pointer approach is an essential part of a programmer’s toolkit, especially in technical interviews.

18 Dec 2019

AfterAcademy Tech

Time and Space Complexity Analysis of Algorithm

In this blog, we will learn about the time and space complexity of an Algorithm. We will learn about worst case, average case, and best case of an algorithm. We will also see various asymptotic notations that are used to analyse an algorithm. So, let's learn the algorithm of an algorithm.

18 Dec 2019

AfterAcademy Tech

What is a Schema?

In this blog, we will be learning what is a schema in the database. Also, we will study about various types of schema and how it is related to data abstraction. We will take various examples to understand this in detail.

17 Dec 2019

AfterAcademy Tech

What is iteration in programming?

The repeated execution of some groups of code statements in a program is called iteration. We will discuss the idea of iteration in detail in this blog.

17 Dec 2019