ELB Learning Web 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.
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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']
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Q3. Sum or product asked
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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 having two pointers in each node. The first one points to the next node of the list, however, the other pointer is random and can point to any n...read more
Ans. Recursion
The basic idea is to consider the linked list like a binary tree. Every node of the Linked List has 2 pointers. So we consider these nodes as binary tree nodes. The head of the list becomes the root of the tree. So what we basically have to do now is to traverse the binary tree and clone it. The main issue that we need to tackle here is that of loops.
 
For example, we can have, 1 1 2 0 -1, we need to handl...read more
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Round duration - 150 Minutes
Round difficulty - Medium

Q1. Loot Houses
A thief wants to loot houses. He knows the amount of money in each house. He cannot loot two consecutive houses. Find the maximum amount of money he can loot.
Input Format :
The first line of...read more
Ans. Recursive Approach
Suppose that the robber is at the ith house. The robber has two options:
• If he decides to rob this house, then he cannot rob the next house, so he’ll have to go to the house after that.
• If he decides not to rob this house, he has no restriction over choosing the next house.
You will follow the same for the rest of the houses. Thus, if maxLoot(i) is the maximum loot possible when we’re at the ith house, t...read more
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Q2. System Design Question
Design a website like amazon.
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Round duration - 10 Minutes
Round difficulty - Easy

Q1. Basic interview questions only
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Q2. Basic coding questions only
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Q3. Besic Oops interview questions
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Q4. Basic data type questions
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Q5. Basic string coding question
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I was asked to create a web page along with some functionality using any JavaScript library with in 5 days.

Q1. What is the use of this keyword?
Ans. 
The 'this' keyword refers to the current object and is used to access its properties and methods.
• Used to refer to the current object in a method or constructor

• Can be used to call another constructor in the same class

• Can be used to call a method of the same object

• Can be used to call a method of a parent object

• Can be used to bind a function to a specific object
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Q1. Explain about web development to 5 year old child?
Ans. 
Web development is like building a house on the internet where people can visit and do things.
• Web development is creating websites and web applications using programming languages like HTML, CSS, and JavaScript.

• It involves designing how the website looks and works, and making sure it works well on different devices like computers and phones.

• Examples of web development include creating a website for a business, an onlin
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Q1. What is str in c
Ans. 
str in C is a data type used to represent strings as arrays of characters.
• str in C is typically declared as an array of characters, terminated by a null character '\0'.

• Functions like strcpy(), strcmp(), and strlen() are commonly used with str in C.

• Example: char str[10] = "hello"; // Declaration of a string in C
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Q2. What is pointers in c
Ans. 
Pointers in C are variables that store memory addresses of other variables.
• Pointers are used to access and manipulate memory directly.

• They are denoted by an asterisk (*) before the variable name.

• Example: int *ptr; // declares a pointer to an integer variable
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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

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 having two pointers in each node. The first one points to the next node of the list, however, the other pointer is random and can point to any n...read more
Ans. Recursion
The basic idea is to consider the linked list like a binary tree. Every node of the Linked List has 2 pointers. So we consider these nodes as binary tree nodes. The head of the list becomes the root of the tree. So what we basically have to do now is to traverse the binary tree and clone it. The main issue that we need to tackle here is that of loops.
 
For example, we can have, 1 1 2 0 -1, we need to handl...read more
Answered Anonymously
Add your answer

Round duration - 150 Minutes
Round difficulty - Medium

Q1. Loot Houses
A thief wants to loot houses. He knows the amount of money in each house. He cannot loot two consecutive houses. Find the maximum amount of money he can loot.
Input Format :
The first line of...read more
Ans. Recursive Approach
Suppose that the robber is at the ith house. The robber has two options:
• If he decides to rob this house, then he cannot rob the next house, so he’ll have to go to the house after that.
• If he decides not to rob this house, he has no restriction over choosing the next house.
You will follow the same for the rest of the houses. Thus, if maxLoot(i) is the maximum loot possible when we’re at the ith house, t...read more
Answered Anonymously
Add your answer
Q2. System Design Question
Design a website like amazon.
Add your answer

Round duration - 10 Minutes
Round difficulty - Easy