Internshala Front end Developer Interview Questions and Answers

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. About Myself in details
Add your answer
Q2. Past internships and work experiences
Add your answer

Q1. Primary keys, Unique key
Add your answer
Q2. Usage advantages and disadvantages of Indexing
Ans. 
Indexing improves data retrieval speed but can increase storage and maintenance costs.
• Faster query performance: Indexes allow for quicker data retrieval. For example, searching for a user by ID is faster with an index.

• Reduced I/O operations: Indexes minimize the number of disk reads required to find data, enhancing performance.

• Increased storage requirements: Indexes consume additional disk space, which can be significa...read more
Answered by AI
Add your answer

SQL- 1 departments with no users
2 dept_id and their respective no. of users

DSA1: Most frequent no. in an array
DSA2: Zero Sum subarray exists

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

Basic Aptitude test

Coding Round is little tough.

Q1. Formal conversation about the projects and all that kind of stuff
Add your answer
Q2. What kind of project you have worked on
Add your answer
Q3. How you tackles different project
Add your answer

They will give you problem to solve

Machine coding round

Q1. Introduction and knowledge of ERP
Add your answer
Q2. Previous Experience
Add your answer

Q1. DSA - related to arrays hard
Add your answer
Q2. Stack medium level
Add your answer

Medium level coding question

Q1. Intreview round asked about project mentioned in CV
Add your answer
Q2. Basic of reacts, opps question,sql queries
Add your answer