Dot-com Infotech Intern Interview Questions and Answers

Q1. Which services you have used in Aws cloud?
Ans. 
I have used services like EC2, S3, RDS, Lambda, and CloudWatch in AWS cloud.
• EC2

• S3

• RDS

• Lambda

• CloudWatch
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Q2. Explanation on services and how that services work?
Ans. 
Services are offerings provided by a company or individual to fulfill a specific need or desire of a customer.
• Services can range from physical tasks like cleaning or repairs to intangible services like consulting or counseling.

• Service providers typically outline the scope of their services, pricing, and terms in a service agreement or contract.

• Customers can access services through various channels such as in-person, on...read more
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Q1. Education Details
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Q2. Skills, Strength
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CRUD Application using Angular

Q1. Node.js, OOPs concepts
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Coding Test consists of 3 Problem Question (2 Logical questions and 1 SQL Query ) and Around 20 MCQS
Platform - CoderByte

30 Aptitude Question
3 Mail Writing Question

Q1. Explain 1st Problem Solved in Coding Test. Optimize it.
Ans. 
Solved a sorting problem by implementing quicksort algorithm.
• Implemented quicksort algorithm to efficiently sort the array.

• Used recursion to divide the array into smaller subarrays and sort them individually.

• Optimized the algorithm by choosing a pivot element strategically to minimize comparisons.
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Q2. Explain 2nd Problem Solved in Coding Test. I failed 1 test case in 1st round which was told to solve again.
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Q3. Explain 3rd Question based on SQL Query.
Ans. 
The 3rd question based on SQL query likely refers to a specific query or scenario related to SQL.
• Understand the context of the query being asked about

• Analyze the structure and purpose of the SQL query

• Explain the expected output or result of the query
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Q4. Write a code to Reverse Digits.
Ans. 
Code to reverse digits of a number
• Use modulo operator to extract the last digit of the number

• Multiply the result by 10 and add the next digit until all digits are reversed

• Handle negative numbers separately by converting to positive before reversing
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Q5. A problem question for solving a SQL Query.
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Q1. What is hyperparameter tuning?
Ans. 
Hyperparameter tuning is the process of selecting the best set of hyperparameters for a machine learning model.
• Hyperparameters are parameters that are set before the learning process begins.

• Hyperparameter tuning involves adjusting hyperparameters to optimize the model's performance.

• Common techniques for hyperparameter tuning include grid search, random search, and Bayesian optimization.
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Q2. How do we train neural networks?
Ans. 
Neural networks are trained using algorithms that adjust the weights and biases of the network based on the input data and desired output.
• Neural networks are trained using a process called backpropagation, where the error between the predicted output and the actual output is used to adjust the weights and biases of the network.

• Training data is fed into the neural network, and the network's output is compared to the des...read more
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Q3. What is overfitting?
Ans. 
Overfitting occurs when a machine learning model learns the training data too well, including noise and outliers, leading to poor generalization on new data.
• Overfitting happens when a model is too complex and captures noise in the training data.

• It can be identified when a model performs well on training data but poorly on unseen data.

• Techniques to prevent overfitting include cross-validation, regularization, and early ...read more
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Q1. What are the responsibilities of HR?
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Q2. What are the steps involved in Hiring a candidate?
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Q1. Why you chose hr?
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There were 3 coding questions in the first round

30 MCQ questions based on Math, reasoning and English and also email writing

Q1. I'm on it my interview scheduled on 14 oct
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Q1. Python program questions
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Q2. OOPS based programming questions
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