Houghton Mifflin Harcourt Software Development Engineer Interview Questions and Answers

Q1. Basic question of javascript like temporal dead zone, hoisting
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Q2. Basic of sql and mongo
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Q1. Logic bluiding question
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Q2. 2 leet code quesztion
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Q1. Slaray negotiation
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Q1. They asked us to design the database of a e-learning platform like upGrad.You have to handle login as well as lectures.
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Q2. SQL query to fetch progress for given user id and course id
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Q1. Explian oops concepts
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Object-oriented programming concepts that focus on classes and objects for better code organization and reusability.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Ability of a class to inherit properties and behavior from another class.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation det...read more
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Q2. Types of waits in selenium
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Types of waits in Selenium include implicit, explicit, and fluent waits.
• Implicit wait: Waits for a certain amount of time before throwing a NoSuchElementException.

• Explicit wait: Waits for a certain condition to occur before proceeding further in the code.

• Fluent wait: Waits for a condition to be true with a specified frequency of checking.

• Example: driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
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Q1. Salary dsicussion
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Q2. Previous company details
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Two dynamic programming challenges at the hard level on LeetCode and 10 medium-level SQL challenge.

Question on Linked list. array and string manipulation.

Q1. Tell me about your project?
Ans. 
Developed a web application for tracking personal fitness goals and progress.
• Used React.js for front-end development

• Implemented RESTful APIs using Node.js and Express for back-end functionality

• Utilized MongoDB for database management
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Q2. What is useState, useEffect, useRedux?
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useState, useEffect, useRedux are hooks in React for managing state and side effects.
• useState is a hook used for managing state in functional components.

• useEffect is a hook used for handling side effects in functional components.

• useRedux is not a built-in hook, but a common convention for using Redux with React.
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Q3. Tell me the changes too place in 2015 EcMascript?
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In 2015, EcmaScript 6 (ES6) was released with significant updates and new features.
• Introduction of let and const for block-scoped variables

• Arrow functions for more concise syntax

• Classes for object-oriented programming

• Template literals for string interpolation

• Enhanced object literals and destructuring assignments
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Q4. Explain the flow about how API works?
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API works by allowing different software applications to communicate with each other through a set of rules and protocols.
• API receives a request from a client application

• API processes the request and interacts with the server

• API sends back a response to the client application

• Examples: REST API, SOAP API
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Q1. Basic Questions based on pervious project
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Q1. Lifecycle methods
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Q1. Project details and how to tackle challenges and bugs efficiently
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