Jamboree Education Software Developer Interview Questions and Answers

Implement login with Google SSO, show emails in a single place

Q1. How to implement JWT
Ans. 
JWT can be implemented by generating a token with user information and a secret key, then verifying the token using the same secret key.
• Generate a JWT token with user information and a secret key

• Include necessary claims like expiration time, issuer, etc.

• Verify the JWT token using the same secret key

• Handle token expiration and refresh if needed
Answered by AI
Add your answer
Q2. Please read about it on the internet, do take care of public and private key use
Add your answer
Q3. Middleware in express, how to create one?
Ans. 
Middleware in Express is a function that has access to the request and response objects.
• Create a middleware function using app.use() method in Express.

• Middleware functions have access to the request object (req), the response object (res), and the next middleware function in the application's request-response cycle.

• Example: app.use((req, res, next) => { console.log('This is a middleware function'); next(); });
Answered by AI
Add your answer
Q4. Read about it on the internet
Add your answer

Q1. Discussed about guards in Angular
Add your answer
Q2. Read about it on the internet
Add your answer
Q3. How does lazy loading work in Angular
Ans. 
Lazy loading in Angular delays loading of modules until they are needed
• Lazy loading helps improve performance by only loading modules when they are required

• It is achieved by using the loadChildren property in the route configuration

• Lazy loaded modules are loaded asynchronously when the user navigates to the corresponding route
Answered by AI
Add your answer
Q4. Read about lazy loading in Angular
Add your answer
Q5. How to enable SSR in Angular
Ans. 
Server-side rendering (SSR) in Angular can be enabled by using Angular Universal.
• Install Angular Universal using Angular CLI

• Create a new Angular Universal project

• Update app.module.ts to include server-side rendering

• Build and run the Angular Universal project
Answered by AI
Add your answer
Q6. Read about Angular Universal for this
Add your answer

3 questions in 3 hr, topics were Dp, Strings, Tree

1hr durations 40 questions, main topics were patterns, profit loss, work man , etc.

Q1. OOPS, JAVA, Mysql, general questsjons
Add your answer

It was on hacker rank

It was a aptitude test taken by me of the new and all the response and the of new

Coding test of your skills and how well can you cope up with a problem given.

Q1. LAC of 3 nodes
Ans. 
LAC stands for Location Area Code, a unique identifier for a group of cells in a mobile network.
• LAC helps in identifying the location of a mobile device within a cellular network.

• It is used for handover procedures when a device moves between different cells.

• In a network with 3 nodes, each node would have a unique LAC assigned to it.
Answered by AI
Add your answer
Q2. Reverse of the array
Ans. 
Reverse the order of strings in an array
• Use the reverse() method to reverse the array

• Example: ['apple', 'banana', 'cherry'] -> ['cherry', 'banana', 'apple']
Answered by AI
Add your answer
Q3. Sum or product asked
Add your answer

Q1. Find duplicates in an array
Ans. 
Use a hash set to find duplicates in an array of strings.
• Create a hash set to store unique elements.

• Iterate through the array and check if the element is already in the hash set.

• If it is, then it is a duplicate. If not, add it to the hash set.
Answered by AI
Add your answer
Q2. Find single duplicate element in an array where contents of the array are length of array - 1
Ans. 
Find the single duplicate element in an array of strings with length n-1.
• Iterate through the array and use a HashSet to keep track of elements seen so far.

• If an element is already in the HashSet, that is the duplicate element.

• Return the duplicate element once found.
Answered by AI
Add your answer

Create a student support system

Q1. Design an order and payments system for an EdTech company
Ans. 
Design an order and payments system for an EdTech company
• Allow users to browse and select courses

• Implement a shopping cart for users to add courses

• Integrate payment gateways for secure transactions

• Provide order confirmation and receipt to users

• Allow users to track their order status
Answered by AI
Add your answer

Round duration - 20 Minutes
Round difficulty - Easy

very easy questions related to web development. 1 coding question

Q1. 
Clone a Linked List with Random Pointers
Given a linked list where each node has two pointers: the first points to the next node in the list, and the second is a random pointer that can point to any node ...read more
Ans. 
Create a deep copy of a linked list with random pointers without using references of original nodes.
• Iterate through the original linked list and create a new node for each node in the list.

• Store the mapping of original nodes to new nodes in a hashmap to handle random pointers.

• Update the random pointers of new nodes based on the mapping stored in the hashmap.

• Return the head of the copied linked list.
Answered by AI
Add your answer

Round duration - 150 Minutes
Round difficulty - Medium

Q1. 
Loot Houses Problem Statement
A thief is planning to steal from several houses along a street. Each house has a certain amount of money stashed. However, the thief cannot loot two adjacent houses. Determi...read more
Ans. 
Determine the maximum amount of money a thief can steal from houses without looting two consecutive houses.
• Create an array 'dp' to store the maximum money that can be stolen from each house without looting two consecutive houses.

• Iterate through the houses and update 'dp' based on the maximum money that can be stolen from the current house.

• Return the maximum value in 'dp' as the answer.
Answered by AI
Add your answer
Q2. Can you design a website similar to Amazon?
Ans. 
Yes, I can design a website similar to Amazon by focusing on user-friendly interface, robust search functionality, secure payment options, and personalized recommendations.
• Focus on user-friendly interface with easy navigation

• Implement robust search functionality with filters and sorting options

• Provide secure payment options with encryption and fraud protection

• Include personalized recommendations based on user behavior
Answered by AI
Add your answer

Round duration - 10 Minutes
Round difficulty - Easy

Basic coding maths aptitude java python communication skills test

Java coding c plus python SQL oracle dbmsos