MBM Newtech Interview Questions and Answers

Starts with an online assessment test on HackerRank. Expect a LeetCode Medium question most of the time, mostly created by HackerRank.

Q1. LC medium related to dynamic programming.
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Q2. LC easy related to heaps.
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Q1. LC medium-hard, don't remember the category.
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Q1. This was a design round. You can expect to be asked to design the DB schema and API endpoints for a well-known use case. Interviewer was super helpful and receptive throughout. While getting to an agreeabl...read more
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Q1. Hiring manager round. Mostly discussions about your profile, discussion on past projects from your resume. You can do well in this round if you know your basics and can explain your projects to some depth....read more
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Q1. Generate a Dataframe
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Q1. What is promise
Ans. 
A promise is an object representing the eventual completion or failure of an asynchronous operation.
• Promises are used in JavaScript to handle asynchronous operations.

• They can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() to handle success and failure callbacks.

• Example: Fetching data from an API returns a promise that resolves with the data or rejects with an error.
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Q2. What is hoisting
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Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope during compilation.
• Variable and function declarations are hoisted to the top of their scope.

• Only declarations are hoisted, not initializations.

• Function declarations take precedence over variable declarations.
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Q1. What is event loop
Ans. 
Event loop is a mechanism in programming that allows for asynchronous execution of code by continuously checking for and handling events.
• Event loop is commonly used in JavaScript to handle asynchronous operations like setTimeout, setInterval, and AJAX requests.

• It allows for non-blocking I/O operations, ensuring that the program can continue running while waiting for I/O operations to complete.

• Event loop works by contin...read more
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Q1. Find frequency of integer in array
Ans. 
Calculate the frequency of a specific integer in an array of strings.
• Iterate through the array and use a hashmap to store the frequency of each integer.

• Return the frequency of the specified integer from the hashmap.
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Q2. Node js project explanation and evaluation
Ans. 
Node.js is a runtime environment that allows you to run JavaScript on the server side.
• Node.js is built on Chrome's V8 JavaScript engine.

• It uses an event-driven, non-blocking I/O model.

• Node.js is commonly used for building server-side applications and APIs.

• It has a large ecosystem of libraries and frameworks, such as Express and Socket.io.
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Q1. What is dns port no?
Ans. 
DNS port number is 53.
• DNS port number is used for DNS queries and responses.

• It is a well-known port number, which is 53.

• DNS uses both TCP and UDP protocols on port 53.
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Q2. What is ssh port no?
Ans. 
SSH port number is 22.
• SSH port number is used for secure communication over a network.

• Default port number for SSH is 22.

• Port number can be changed for security reasons.

• Example: ssh user@hostname -p 2222
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Q3. What brust force attack?
Ans. 
A brute force attack is a trial-and-error method used by hackers to crack passwords or encryption by systematically trying all possible combinations.
• Brute force attacks are time-consuming but effective against weak passwords.

• Hackers use automated tools to try all possible combinations until the correct one is found.

• Examples include trying all possible 4-digit PIN codes or dictionary words as passwords.

• Strong passwords ...read more
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Q1. Tell me about your self?
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Questions were asked about my on my education background, my family, and why do I want to join this company?