10+ Dr. Arora's Pathlab Interview Questions and Answers

Acknowledge the issue, apologize for the inconvenience, and provide updates on the progress of resolving the issue.

• Send out a notification to all users explaining the issue and apologizing for the inconvenience caused.

• Provide regular updates on the progress of resolving the issue.

• Offer compensation or a discount to affected users as a gesture of goodwill.

• Ensure that the issue is fully resolved before resuming normal service.

• Conduct a post-mortem analysis to identify the root ...read more

Metrics to track success and estimate ad revenue for Facebook Messenger

• Metrics to track success: Daily active users, retention rate, engagement rate, customer satisfaction score, conversion rate

• To estimate ad revenue: Average revenue per user, number of ad impressions, click-through rate, cost per click

• Example: If Messenger has 1 billion daily active users and the average revenue per user is $5, the estimated ad revenue would be $5 billion per day

Designing zero state recommendation on Swiggy and factors for ranking.

• Consider user's previous orders and preferences

• Analyze popular dishes in the area

• Take into account restaurant ratings and reviews

• Ensure diversity in cuisine types

• Goal of Swiggy is to provide personalized and convenient food ordering experience

The graph shows a negative correlation between the number of orders placed and the average time spent to place an order.

• As the number of orders placed increases, the average time spent to place an order decreases.

• This could indicate that customers are becoming more familiar with the ordering process over time.

• Alternatively, it could suggest that the ordering process has been streamlined or simplified.

To evaluate the context of a page for a contextual ad engine, we would use data such as page content, user behavior, and location.

• Analyze the text on the page for keywords and topics

• Consider the user's search history and browsing behavior

• Take into account the location of the user and the page

• Look at the time of day and day of the week

• Consider the device being used to access the page

Swiggy's increase in average order value may be due to various factors and is not necessarily a bad sign.

• The increase in average order value could be due to customers ordering more expensive items or adding more items to their orders.

• It could also be due to Swiggy's pricing strategy or promotions that encourage customers to order more.

• An increase in average order value could be a positive sign of customer loyalty and satisfaction.

• However, if the increase is due to customers b...read more

Swiggy would price a display ad based on factors such as ad placement, target audience, and ad duration.

• Swiggy would consider the placement of the ad on the app, such as on the home screen or during checkout.

• The target audience of the ad would also be taken into account, such as location, age, and order history.

• The duration of the ad would also affect the pricing, with longer durations costing more.

• Swiggy may also consider the competition for ad space and adjust pricing accor...read more

HTTPS is a secure version of HTTP where data is encrypted. Security is enforced at the transport layer.

• HTTP stands for Hypertext Transfer Protocol while HTTPS stands for Hypertext Transfer Protocol Secure.

• HTTPS uses SSL/TLS encryption to secure data transmission while HTTP does not.

• HTTPS uses port 443 while HTTP uses port 80.

• Security is enforced at the transport layer in HTTPS while in HTTP, security is not enforced.

• HTTPS ensures that data is not tampered with or intercepted ...read more

Web request/response is a client-server communication where a client sends a request to a server and the server responds with data.

• A client sends a request to a server using a URL

• The server receives the request and processes it

• The server sends a response back to the client with the requested data

• The response can include headers, status codes, and a message body

• HTTP is the most common protocol used for web request/response

A browser is a software application that retrieves, presents, and traverses information resources on the World Wide Web.

• A browser sends a request to a server for a webpage

• The server responds with the HTML, CSS, and JavaScript files

• The browser renders the webpage using the HTML, CSS, and JavaScript

• The browser uses a rendering engine to display the webpage

• The browser also has a JavaScript engine to execute JavaScript code on the webpage

BGP attributes used for controlling inbound & outbound traffic are Local Preference, AS Path, and MED.

• Local Preference: Used to influence the path selection within an autonomous system (AS). Higher value means preferred route.

• AS Path: Specifies the ASes that the route has traversed. Shorter AS Path is preferred.

• MED (Multi-Exit Discriminator): Used to influence the path selection between different ASes. Lower MED is preferred.

Find buildings receiving sunlight from given array of buildings

• Iterate through array and keep track of maximum height seen so far

• If current building height is greater than maximum height, it will receive sunlight

• Add index of buildings receiving sunlight to result array

DDoS stands for Distributed Denial of Service, a type of cyber attack that floods a network or website with traffic to make it unavailable.

• DDoS attacks are carried out by multiple compromised systems, often called a botnet.

• The goal of a DDoS attack is to overwhelm the target with traffic, making it impossible for legitimate users to access the service.

• DDoS attacks can be mitigated by using specialized hardware or software, or by working with a content delivery network (CDN).

• E...read more

I have a strong understanding of various systems and their functions.

• Knowledge of operating systems such as Windows, Linux, and MacOS

• Familiarity with network systems and protocols

• Understanding of security systems and procedures

• Experience with monitoring and troubleshooting system issues

STP (Spanning Tree Protocol) processes are used to prevent network loops and ensure redundancy in a network.

• STP elects a root bridge to be the central point of the network.

• STP blocks redundant links to prevent loops.

• STP uses BPDU (Bridge Protocol Data Unit) messages to communicate between switches.

• STP has different port states: blocking, listening, learning, forwarding, and disabled.

• STP can be configured with different versions such as STP, RSTP, and MSTP.