20+ Pradeepit Consulting Services Interview Questions and Answers

Filter time based logs using automation

• Use regular expressions to extract timestamps from logs

• Implement a script or tool to filter logs based on specified time range

• Consider using tools like grep, awk, or Python for automation

• Automate the process to save time and ensure consistency

• Test the automation script with different log files to ensure accuracy

Generator functions and symbols in JavaScript. Implementation of const keyword in ES5.

• Generator functions are functions that can be paused and resumed, allowing for lazy evaluation of data.

• Symbols are a new primitive type in ES6 that can be used as unique identifiers.

• To implement const in ES5, we can use Object.defineProperty to create a read-only property on an object.

SDET focuses on developing automated tests and tools, while QA focuses on manual testing and bug reporting.

• SDET is more focused on developing automated tests and tools to ensure software quality.

• QA is more focused on manual testing, bug reporting, and ensuring the product meets requirements.

• SDET often works closely with developers to integrate automated testing into the development process.

• QA typically works independently to test the software and report bugs.

• SDET requires pro...read more

The missing number can be found by summing all numbers in the series and subtracting from the expected sum of consecutive numbers.

• Sum all numbers in the series

• Calculate the expected sum of consecutive numbers starting from 1

• Subtract the sum of the series from the expected sum to find the missing number

Calculate top 20 percentile of student details based on score in a student table.

• Calculate the 80th percentile score using formula: 80th_percentile = 0.8 * total_students

• Sort the scores in descending order and find the score at 80th percentile position

• Retrieve student details with scores greater than or equal to the 80th percentile score

Sort a map by values in Java

• Create a list of map entries

• Sort the list based on values using a custom comparator

• Convert the sorted list back to a map

Selecting the right automation tool is crucial for successful testing.

• Consider the technology stack of the application being tested

• Evaluate the features and capabilities of different automation tools

• Assess the ease of use and learning curve for the team

• Check for compatibility with existing testing frameworks

• Look for good community support and documentation

• Consider the cost and licensing of the tool

Find the maximum distance between any two leaf nodes of a binary tree.

• Traverse the tree to find the maximum depth of left and right subtrees

• Calculate the maximum distance by adding the depths of left and right subtrees

Testing a simple login page involves testing framework architecture, Java Selenium exceptions, and HTTP port numbers.

• Testing the login functionality with valid and invalid credentials

• Testing the error messages displayed for invalid credentials

• Testing the session timeout functionality

• Testing the password reset functionality

• Using a testing framework like JUnit or TestNG

• Handling exceptions like ElementNotVisibleException, NoSuchElementException, TimeoutException

• Understanding the...read more

The '==' operator checks for equality after type coercion, while '===' checks for equality without type coercion.

• The '==' operator compares two values after converting them to a common type.

• The '===' operator compares two values without type conversion, so they must be of the same type to be considered equal.

• Example: 1 == '1' will return true because the values are equal after type coercion, but 1 === '1' will return false because they are of different types.

Callback hell refers to the situation where multiple nested callbacks make the code difficult to read and maintain.

• Occurs when multiple asynchronous operations are nested within each other

• Can lead to deeply nested code structure which is hard to follow

• Can be avoided by using promises or async/await

Test plan for a login form

• Identify test scenarios for valid/invalid credentials

• Test password reset functionality

• Verify error messages for incorrect inputs

• Test for session timeout

• Check for password encryption

• Perform security testing for SQL injection

• Test for compatibility across different browsers and devices

Memoization is a technique to optimize function calls by caching their results.

• Memoization is used to store the results of expensive function calls and return the cached result when the same inputs occur again.

• It improves performance by avoiding redundant computations.

• Fibonacci sequence is a classic example to demonstrate memoization.

• Memoization can be implemented using an object or an array to store the cached results.

To find the second largest number in an array, sort the array in descending order and return the second element.

• Sort the array in descending order

• Return the second element in the sorted array

Custom events are user-defined events that can be triggered in a software application.

• Custom events can be defined using event listeners and dispatchers.

• They can be used to track user behavior, monitor application performance, and trigger specific actions.

• Examples of custom events include button clicks, form submissions, and page scrolls.

Custom implementation of array flat method

• Create a function that takes an array as input

• Iterate through each element of the array

• If an element is an array, recursively call the function on that element

• If an element is a string, add it to the result array

• Return the result array

Our product helps customers by providing personalized solutions to their specific needs, increasing efficiency and satisfaction.

• Our product offers customizable features to meet individual customer requirements.

• It streamlines processes and automates tasks, saving time and resources for customers.

• Customers receive ongoing support and guidance to maximize the benefits of the product.

• For example, a customer in the e-commerce industry can use our product to track customer interact...read more

A polyfill is a code that adds a feature which the browser may not support. Promise.all() polyfill can be used for older browsers.

• Create a function that takes an array of promises as input

• Return a new promise that resolves when all promises in the input array have resolved

• If any promise in the input array rejects, reject the new promise with the reason of the first promise that rejects

• Use setTimeout and recursion to check if all promises have resolved

• If the browser supports P...read more

Design a least recently used cache system.

• Use a combination of a hash map and a doubly linked list to keep track of the least recently used items.

• When a new item is accessed, move it to the front of the list.

• If the cache is full, remove the least recently used item from the end of the list.

Async await is a feature in JavaScript that allows for asynchronous code to be written in a synchronous manner.

• Async await is built on top of promises and provides a cleaner syntax for handling asynchronous operations.

• It allows you to write asynchronous code that looks like synchronous code, making it easier to read and maintain.

• The 'async' keyword is used to define a function as asynchronous, while the 'await' keyword is used to pause the execution of the function until a pr...read more