100+ Member Technical Staff Interview Questions and Answers

Find the maximum window size to sort an unsorted array.

• Identify the longest decreasing subarray from the beginning and longest increasing subarray from the end

• Find the minimum and maximum element in the identified subarrays

• Expand the identified subarrays until all elements in the array are covered

• The length of the expanded subarray is the maximum window size

A class in JavaScript is a blueprint for creating objects with similar properties and methods.

• Classes are used to create multiple objects with the same structure and behavior.

• They provide a way to organize and encapsulate related data and functions.

• Classes can have properties (variables) and methods (functions) that define their behavior.

• Instances of a class can be created using the 'new' keyword.

• Classes can also have constructors, which are special methods called when an obj...read more

Merge sort and Quick sort are sorting algorithms used to sort arrays of data.

• Merge sort is a divide and conquer algorithm that divides the input array into two halves, sorts each half recursively, and then merges the sorted halves.

• Quick sort is also a divide and conquer algorithm that selects a pivot element and partitions the array around the pivot, sorting the two resulting sub-arrays recursively.

• Merge sort has a time complexity of O(n log n) and is stable, but requires add...read more

Comparison of heights of two soldiers chosen based on different criteria from a grid of soldiers.

• Soldier A is chosen based on tallest men from every column and shortest among them.

• Soldier B is chosen based on shortest men from every row and tallest among them.

• The height of Soldier A and Soldier B cannot be determined without additional information about the grid of soldiers.

To find and remove a loop in a Linked List, we can use Floyd's Cycle Detection Algorithm.

• Use two pointers, slow and fast, to detect if there is a loop in the Linked List

• If the two pointers meet at some point, there is a loop

• To remove the loop, set one of the pointers to the head of the Linked List and move both pointers one step at a time until they meet again

• The meeting point is the start of the loop, set the next pointer of this node to NULL to remove the loop

Density of a person in a social networking graph is the ratio of friends who interacted with the person to the total number of friends.

• Calculate the number of friends who interacted with the person.

• Calculate the total number of friends for that person.

• Divide the number of interacting friends by the total number of friends to get the density.

• Density = (Number of interacting friends) / (Total number of friends)

Finding the longest last occurring word in a sentence with multiple whitespace.

• Split the sentence into words using whitespace as delimiter

• Reverse the list of words

• Iterate through the list and find the first occurrence of each word

• Calculate the length of each last occurring word

• Return the longest last occurring word

Priority queue is a data structure that stores elements with priority levels and retrieves them in order of priority.

• Priority queue is implemented using a heap data structure.

• Stack can be implemented using a priority queue by assigning higher priority to the most recently added element.

• Queue can be implemented using a priority queue by assigning higher priority to the oldest element.

Use triggers to update related table on row modification.

• Create a trigger on the main table to update the related table

• Use the UPDATE statement in the trigger to modify the related table

• Ensure that the trigger is efficient and does not cause performance issues

• Test the trigger thoroughly to ensure that it works as expected

Algorithm to find median in a stream of n numbers

• Sort the list and find the middle element for odd n

• For even n, find the average of middle two elements

• Use a min-heap and max-heap to maintain the smaller and larger half of the stream respectively

• Insert new elements into the appropriate heap and balance the heaps to ensure median is always at the top

Code to find number of combinations of reaching step N by ball falling from staircase with 1 or 2 steps per jump.

• Use dynamic programming to solve the problem

• Create an array to store the number of ways to reach each step

• Initialize the array with base cases for steps 0, 1, and 2

• Use a loop to fill in the array for steps 3 to N

• The number of ways to reach step i is the sum of the number of ways to reach step i-1 and i-2

• Return the value at the Nth index of the array

Given 2 arrays with n and n-1 elements, find the unique element in the larger array.

• Loop through the larger array and check if each element is present in the smaller array.

• If an element is not present in the smaller array, it is the unique element.

• Return the unique element.

• Example: arr1 = ['a', 'b', 'c', 'd'], arr2 = ['a', 'b', 'c'], unique element = 'd'

Electric current is the flow of electric charge through a conductor.

• Electric current is measured in amperes (A).

• It is caused by the movement of electrons in a conductor.

• There are two types of electric current - direct current (DC) and alternating current (AC).

• DC flows in one direction, while AC changes direction periodically.

• Electric current is made up of three main components - voltage, current, and resistance.

• Ohm's Law (V = IR) describes the relationship between these compo...read more

An electronic device is a device that operates using electronic circuits and components to perform various functions.

• An electronic device typically consists of a power source, input/output components, a processor, memory, and various other electronic components.

• Examples of electronic devices include smartphones, laptops, tablets, and digital cameras.

• Electronic devices can be used for communication, entertainment, data processing, and various other purposes.

• The parts of an ele...read more

A recursive function calls itself until a base case is reached, then returns the result to the previous call.

• Each call creates a new instance of the function on the call stack

• The function continues to call itself until a base case is reached

• Once the base case is reached, the function returns the result to the previous call

• The previous call then continues executing from where it left off

The sequence of steps a browser takes to convert HTML, CSS, and JavaScript into a rendered page.

• Includes parsing HTML, constructing the DOM tree, calculating styles, and executing JavaScript.

• Optimizing the critical rendering path can improve page load times and user experience.

• Examples of optimization techniques include minimizing render-blocking resources and using lazy loading.

• The critical rendering path can vary depending on the browser and device being used.

Docker Swarm is used for orchestrating multiple Docker containers across multiple hosts, while Docker Compose is used for defining and running multi-container Docker applications.

• Docker Swarm is a container orchestration tool that allows you to manage a cluster of Docker hosts.

• Docker Compose is a tool for defining and running multi-container Docker applications.

• Docker Swarm is used for scaling and managing a cluster of Docker containers, while Docker Compose is used for defin...read more

VPC is a virtual private cloud that allows you to create isolated networks within the cloud environment. Subnets are subdivisions of a VPC, route tables define how traffic is directed within the VPC, and NAT gateway allows instances in a private subnet to access the internet.

• VPC is a virtual private cloud that provides a logically isolated section of the AWS Cloud where you can launch resources.

• Subnets are subdivisions of a VPC that allow you to group resources based on secur...read more

A DG machine is a diesel generator machine used for generating electricity. Components include engine, alternator, fuel system, cooling system, and control panel.

• DG machine stands for Diesel Generator machine.

• Components include engine, alternator, fuel system, cooling system, and control panel.

• Engine is the main component responsible for generating power.

• Alternator converts mechanical energy from the engine into electrical energy.

• Fuel system supplies diesel fuel to the engine...read more