Gateway for Preparing Interviews
Explain the difference between boxing and unboxing. Provide an example. Boxing is the process of converting a value type to the type object, and unboxing is extracting the value type from the object. While the boxing is implicit, unboxing is explicit. Example (written in C#): int i = 13; object myObject = i; // boxing … Read more
What ensemble technique is used by Random forests? Bagging is the technique used by Random Forests. Random forests are a collection of trees which work on sampled data from the original dataset with the final prediction being a voted average of all trees. Both being tree-based algorithms, how is Random Forest different from Gradient Boosting … Read more
How is rounding performed under integer division The fractional part of the result is truncated. This is known as rounding toward zero. Why are the methods of the Math class static So they can be invoked as if they are a mathematical code library. When are automatic variable initialized Automatic variable have to be initialized … Read more
Have you earned any certifications to boost your career opportunities as a Data Analyst? Hiring managers appreciate a candidate who is serious about advancing their career options through additional qualifications. Certificates prove that you have put in the effort to master new skills and knowledge of the latest analytical tools and subjects. While answering the … Read more
What’s the biggest mistake you’ve made on a project? Everyone makes mistakes; character is defined by how you deal with them. This question will allow you to first gauge the candidate’s honesty. If they say that they’ve never made a mistake, you can rest assured that they’re not being truthful and their resume can go … Read more
What is simulated annealing Algorithm? The process is of heating and cooling a metal to change its internal structure. Although, for modifying its physical properties is known as annealing. As soon as the metal cools, it forms a new structure. Also, metal is going to retain its newly obtained properties. Although, we have to keep … Read more
How is it possible for .NET to support many languages? The .NET language code is compiled to Microsoft Intermediate Language (MSIL). The generated code is called managed code. This managed code is run in .NET environment. So after compilation the language is not a barrier and the code can call or use function of another … Read more
What is Kernel SVM? Kernel SVM is the abbreviated version of the kernel support vector machine. Kernel methods are a class of algorithms for pattern analysis, and the most common one is the kernel SVM. What are 3 data preprocessing techniques to handle outliers? Winsorize (cap at threshold). Transform to reduce skew (using Box-Cox or … Read more
What is the difference between an argument and a parameter? While defining method, variables passed in the method are called parameters. While using those methods, values passed to those variables are called arguments. What is the difference between the Boolean & operator and the && operator If an expression involving the Boolean & operator is evaluated, both … Read more
When do you think you should retrain a model? Is it dependent on the data? Business data keeps changing on a day-to-day basis, but the format doesn’t change. As and when a business operation enters a new market, sees a sudden rise of opposition or sees its own position rising or falling, it is recommended … Read more