What is a static class? How is it different from an object? A class in which everything (all fields and methods) is static is equivalent to an object. It has state and behavior. However – such an ‘object’ may...

# Author - Anuj Varma

Let A be an open set. Show that if a finite number of points are removed from A, the remaining set is still open. Is the same true if a countable number of points are removed? Solution If we order the points removed from A, x1...

Which are the top DevOps tools? The most popular DevOps tools are : Git : Version Control System tool Jenkins : Continuous Integration tool Selenium : Continuous Testing tool Puppet, Chef, Ansible , AWS Lambda (C# or java or...

In order of preference (my preference , based on product maturity, knowledge base, user forums etc.): Toad for SQL Server – Pro Edition – $650 /user DB Visualizer Pro – $176 per user dbForge – $99 / per...

Binomial Random Variable – and Probability of SINGLE event happening more than once (multiple heads in a coin-toss etc.) Whenever you have a variable that can take on two possible values (flip of a coin for example), you...

See also ‘Single Event Probabilities’ The probability of a ‘joint’ event – e.g. drawing a white ball followed by two black balls (from a jar containing 7 white and 5 black balls) can be calculated using...

A set is open iff for every point , there exists a such that the neighborhood surrounding is completely contained within (is a subset of) . A point is a limit point of a set iff given any , all neighborhoods intersect the...

How you secure web services depends on whether they are intranet or internet facing. Internet Facing Services For an internet facing web service, you need message level encryption. The encryption key can be a simple username...

Use Case – Customer withdraws cash from Teller (or ATM machine) by filling out a withdrawal slip (or form on ATM machine). Problem Statement: 1. Design the system so that the ‘Balance returned’ can be changed...