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I applied via Naukri.com and was interviewed before Dec 2023. There were 2 interview rounds.
Experienced data analyst with a background in statistics and programming.
Over 5 years of experience in analyzing and interpreting complex data sets
Proficient in statistical software such as R and Python
Strong background in data visualization and reporting
Excellent communication and problem-solving skills
Previously worked on projects involving predictive modeling and machine learning
BI stands for Business Intelligence, which involves analyzing data to help organizations make informed decisions.
BI involves collecting, analyzing, and presenting data to help organizations make strategic decisions.
It includes tools like dashboards, data visualization, and reporting.
BI can help identify trends, patterns, and opportunities for improvement.
Examples of BI tools include Tableau, Power BI, and QlikView.
Yes, Power Query is a data connection technology that enables you to discover, connect, combine, and refine data across a wide variety of sources.
Power Query is a tool in Microsoft Excel used for data transformation and manipulation.
It allows users to import data from various sources, clean and transform it, and load it into Excel for analysis.
Power Query can be used to merge, append, and reshape data from different so...
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I applied via Referral and was interviewed in Aug 2024. There was 1 interview round.
Moving Average is a statistical technique used to analyze data points by creating a series of averages of different subsets of the full data set.
Moving Average helps in smoothing out fluctuations in data to identify trends over time.
It is calculated by taking the average of a specific number of data points within a defined window.
For example, a 3-day moving average for stock prices would be the average of the stock pri...
Decorators in Python are functions that modify the behavior of other functions.
Decorators are denoted by the @ symbol followed by the decorator function name.
They allow you to add functionality to an existing function without modifying its code.
Common use cases include logging, timing, and authentication.
Example: @decorator_function def function_to_decorate(): pass
Object Oriented Programming is a programming paradigm based on the concept of objects, which can contain data and code.
OOP focuses on creating objects that interact with each other to solve complex problems.
Objects have attributes (data) and methods (functions) that can manipulate the data.
Encapsulation, inheritance, and polymorphism are key principles of OOP.
Example: In a car simulation program, a 'Car' object can hav...
Classes are blueprints for creating objects in object-oriented programming.
Classes define the properties and behaviors of objects
Objects are instances of classes
Classes can inherit properties and behaviors from other classes
Classes can have constructors to initialize objects
Classes can have methods to perform actions
Functions are blocks of code that perform a specific task and can be reused multiple times in a program.
Functions help in organizing code and making it more modular.
They can take input parameters and return output values.
Functions can be called multiple times from different parts of the program.
Examples: summing two numbers, finding the maximum value in a list.
Swap L1 and L5 in a list
Create a temporary variable to store the value of L1
Assign the value of L5 to L1
Assign the value of the temporary variable to L5
I was interviewed in Aug 2024.
Calculate the number of rows after joining two datasets.
Count the number of rows in each dataset
Perform the join operation
Count the number of rows in the resulting dataset
Use Excel's text to columns feature to split person names into separate columns.
Select the column containing the full names
Go to the Data tab and click on Text to Columns
Choose 'Delimited' and select the delimiter that separates the names (e.g. space)
Click Finish to split the names into separate columns
I applied via LinkedIn and was interviewed in Sep 2020. There was 1 interview round.
Sharing data insights can help improve services and identify revenue opportunities.
Analyzing customer behavior can help identify areas for improvement
Identifying trends in sales data can help optimize pricing strategies
Using data to personalize marketing efforts can increase customer engagement
Predictive modeling can help identify potential revenue opportunities
Tracking key performance indicators can help optimize busi
I was interviewed before Feb 2024.
Data structure and algorithm questions based on prefix sums.
Questions related to tree-based data structures and algorithms.
I applied via Referral
The function checks if a string is a substring of another string.
Use the built-in string methods like 'indexOf' or 'includes' to check for substring.
If the language supports regular expressions, you can also use them to find substrings.
Consider the case sensitivity of the strings when comparing.
Code to multiply two matrices of dimension M*N and N*K.
Create a result matrix of dimension M*K.
Iterate through each row of the first matrix.
For each row, iterate through each column of the second matrix.
For each element in the row of the first matrix, multiply it with the corresponding element in the column of the second matrix.
Sum up the products and store the result in the corresponding position of the result matrix.
...
SQL query to perform matrix multiplication using two tables with row, col, and value columns.
Use JOIN operation to combine the two tables based on matching row and col values.
Use GROUP BY clause to group the result by row and col values.
Use SUM function to calculate the dot product of corresponding row and col values.
Use INSERT INTO statement to insert the result into a new table.
Prototype in JavaScript is an object that is associated with every function and object by default.
Prototype is used to add properties and methods to an object.
It allows objects to inherit properties and methods from other objects.
Modifying the prototype of a function affects all instances of that function.
Prototypes can be used to create new objects based on existing objects.
The prototype chain allows for property and
Classes in JavaScript are written using the class keyword.
Use the class keyword followed by the class name to define a class.
Use the constructor method to initialize class properties.
Add methods to the class using the class prototype.
Use the new keyword to create an instance of the class.
The number of different ways to climb a ladder of N steps by taking 1 or 2 steps at a time.
This is a classic problem that can be solved using dynamic programming.
The number of ways to climb N steps is equal to the sum of the number of ways to climb N-1 steps and N-2 steps.
The base cases are when N is 0 or 1, where there is only 1 way to climb the ladder.
For example, for N=4, there are 5 different ways: [1, 1, 1, 1], [1
Print a square matrix in spiral order
Start by defining the boundaries of the matrix
Iterate through the matrix in a spiral pattern, printing each element
Adjust the boundaries after each iteration to move inward
Repeat until all elements are printed
Retrieve the second highest marks obtained by each student from a table with student name, subject, and marks.
Use the RANK() function to assign a rank to each row based on the marks in descending order.
Filter the result to only include rows with rank 2 for each student.
Group the result by student name to get the second highest marks for each student.
The .live() method attaches an event handler to the current and future elements, while .delegate() attaches an event handler to a parent element.
The .live() method is deprecated in newer versions of jQuery.
The .delegate() method is preferred over .live() for performance reasons.
Both methods are used to handle events for dynamically added elements.
Example: $(document).live('click', 'button', function() { ... });
Example:...
Chaining in jQuery allows multiple methods to be called on a single element in a single line of code.
Chaining simplifies code and improves readability.
Each method in the chain operates on the result of the previous method.
The chain ends with a method that does not return a jQuery object.
Example: $('div').addClass('highlight').fadeOut();
A callback function is a function that is passed as an argument to another function and is executed later.
Callback functions are commonly used in event-driven programming.
They allow asynchronous execution of code.
Callback functions can be used to handle responses from APIs or user interactions.
They can be anonymous functions or named functions.
Example: setTimeout(function() { console.log('Hello!'); }, 1000);
The .bind() function in jQuery is used to attach an event handler function to one or more elements.
It allows you to specify the event type and the function to be executed when the event occurs.
The .bind() function can be used to bind multiple events to the same element.
It can also be used to pass additional data to the event handler function.
The .bind() function is deprecated in jQuery version 3.0 and above. It is reco
The angle between the hour and minute hands of a clock can be calculated using a formula.
The hour hand moves 30 degrees per hour and 0.5 degrees per minute.
The minute hand moves 6 degrees per minute.
Calculate the angle between the two hands using the formula: |30H - 11M/2|, where H is the hour and M is the minute.
Yes, it is possible to create a slideshow without using JavaScript.
Use CSS animations and transitions to create the slideshow.
Use HTML and CSS to structure and style the slideshow.
Utilize keyframe animations to create the slide transitions.
Use radio buttons or checkboxes to control the slideshow navigation.
Apply the :target pseudo-class to create a simple slideshow without JavaScript.
The men can take turns riding the scooter, allowing them to reach point B faster.
The men can form a queue and take turns riding the scooter.
The person riding the scooter can drop it off at a certain point and the next person can pick it up.
The scooter can be passed along the line of men until everyone reaches point B.
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