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Machine coding, asked about JS concepts
I appeared for an interview in Jul 2017.
The correct method to approach a hotel manager is to be professional, respectful, and prepared.
Introduce yourself and state the purpose of your visit or communication.
Be polite and respectful, addressing the manager by their proper title (e.g., Mr., Ms., or Dr.) and using formal language.
Clearly communicate your request or inquiry, providing any necessary details or documentation.
Demonstrate knowledge and interest in t...
Highlight the benefits of joining our team, showcase our company culture, and provide examples of successful projects.
Emphasize the opportunities for growth and development within the company
Highlight the positive work environment and supportive team members
Showcase successful projects or campaigns that the manager could be a part of
Offer competitive compensation and benefits package
When the hotel is already covered under some other job, you can focus on alternative marketing strategies and target a different audience.
Identify a different target audience that may be interested in the hotel's offerings
Develop alternative marketing strategies to reach the new target audience
Utilize different marketing channels and platforms to promote the hotel
Create partnerships or collaborations with complementary...
The function checks if a string is a substring of another string.
Use the built-in string methods like 'indexOf' or 'includes' to check for substring.
If the language supports regular expressions, you can also use them to find substrings.
Consider the case sensitivity of the strings when comparing.
Code to multiply two matrices of dimension M*N and N*K.
Create a result matrix of dimension M*K.
Iterate through each row of the first matrix.
For each row, iterate through each column of the second matrix.
For each element in the row of the first matrix, multiply it with the corresponding element in the column of the second matrix.
Sum up the products and store the result in the corresponding position of the result matrix.
...
SQL query to perform matrix multiplication using two tables with row, col, and value columns.
Use JOIN operation to combine the two tables based on matching row and col values.
Use GROUP BY clause to group the result by row and col values.
Use SUM function to calculate the dot product of corresponding row and col values.
Use INSERT INTO statement to insert the result into a new table.
Prototype in JavaScript is an object that is associated with every function and object by default.
Prototype is used to add properties and methods to an object.
It allows objects to inherit properties and methods from other objects.
Modifying the prototype of a function affects all instances of that function.
Prototypes can be used to create new objects based on existing objects.
The prototype chain allows for property and
Classes in JavaScript are written using the class keyword.
Use the class keyword followed by the class name to define a class.
Use the constructor method to initialize class properties.
Add methods to the class using the class prototype.
Use the new keyword to create an instance of the class.
The number of different ways to climb a ladder of N steps by taking 1 or 2 steps at a time.
This is a classic problem that can be solved using dynamic programming.
The number of ways to climb N steps is equal to the sum of the number of ways to climb N-1 steps and N-2 steps.
The base cases are when N is 0 or 1, where there is only 1 way to climb the ladder.
For example, for N=4, there are 5 different ways: [1, 1, 1, 1], [1
Print a square matrix in spiral order
Start by defining the boundaries of the matrix
Iterate through the matrix in a spiral pattern, printing each element
Adjust the boundaries after each iteration to move inward
Repeat until all elements are printed
Retrieve the second highest marks obtained by each student from a table with student name, subject, and marks.
Use the RANK() function to assign a rank to each row based on the marks in descending order.
Filter the result to only include rows with rank 2 for each student.
Group the result by student name to get the second highest marks for each student.
The .live() method attaches an event handler to the current and future elements, while .delegate() attaches an event handler to a parent element.
The .live() method is deprecated in newer versions of jQuery.
The .delegate() method is preferred over .live() for performance reasons.
Both methods are used to handle events for dynamically added elements.
Example: $(document).live('click', 'button', function() { ... });
Example:...
Chaining in jQuery allows multiple methods to be called on a single element in a single line of code.
Chaining simplifies code and improves readability.
Each method in the chain operates on the result of the previous method.
The chain ends with a method that does not return a jQuery object.
Example: $('div').addClass('highlight').fadeOut();
A callback function is a function that is passed as an argument to another function and is executed later.
Callback functions are commonly used in event-driven programming.
They allow asynchronous execution of code.
Callback functions can be used to handle responses from APIs or user interactions.
They can be anonymous functions or named functions.
Example: setTimeout(function() { console.log('Hello!'); }, 1000);
The .bind() function in jQuery is used to attach an event handler function to one or more elements.
It allows you to specify the event type and the function to be executed when the event occurs.
The .bind() function can be used to bind multiple events to the same element.
It can also be used to pass additional data to the event handler function.
The .bind() function is deprecated in jQuery version 3.0 and above. It is reco
The angle between the hour and minute hands of a clock can be calculated using a formula.
The hour hand moves 30 degrees per hour and 0.5 degrees per minute.
The minute hand moves 6 degrees per minute.
Calculate the angle between the two hands using the formula: |30H - 11M/2|, where H is the hour and M is the minute.
Yes, it is possible to create a slideshow without using JavaScript.
Use CSS animations and transitions to create the slideshow.
Use HTML and CSS to structure and style the slideshow.
Utilize keyframe animations to create the slide transitions.
Use radio buttons or checkboxes to control the slideshow navigation.
Apply the :target pseudo-class to create a simple slideshow without JavaScript.
The men can take turns riding the scooter, allowing them to reach point B faster.
The men can form a queue and take turns riding the scooter.
The person riding the scooter can drop it off at a certain point and the next person can pick it up.
The scooter can be passed along the line of men until everyone reaches point B.
I applied via Recruitment Consultant and was interviewed before Jul 2020. There was 1 interview round.
I appeared for an interview before Sep 2020.
Round duration - 60 minutes
Round difficulty - Easy
Round duration - 50 minutes
Round difficulty - Easy
Round duration - 60 minutes
Round difficulty - Easy
At the beginning of this round, the interviewer asked me about the data structures I knew. Linked lists, trees, graphs, arrays etc. was my answer. He asked me how well I knew Dynamic Programming. I said I wasn’t strong in that and he said that he would ask me a question on dynamic programming for sure.
Round duration - 40 minutes
Round difficulty - Easy
The interviewer asked me if I was comfortable with the interview process so far and how the previous interviews were. I said it was good and he gave me the first problem to solve.
Round duration - 60 minutes
Round difficulty - Easy
The interviewer asked me some Computer Science fundamentals in this round as well as some behavioural questions.
Implement a Trie data structure with insert and search functions.
Create a TrieNode class with children and isEndOfWord attributes.
Implement insert function to add words by iterating through characters.
Implement search function to check if a word exists by traversing the Trie.
Example: Insert 'apple', 'banana', 'orange' and search for 'apple' and 'grape'.
Do lot of hard work and practice of Data Structures and Algorithms based questions. I personally recommend you Coding Ninjas and Geeks For Geeks for interview preparation.
Application resume tips for other job seekersMake your resume short and try to make it of one page only and do mention all your skills which you are confident of in your resume.
Final outcome of the interviewSelectedI applied via Naukri.com
I appeared for an interview in Aug 2017.
Merge Sort is a divide and conquer algorithm that sorts an array by dividing it into two halves, sorting them separately, and then merging the sorted halves.
Divide the array into two halves
Recursively sort the two halves
Merge the sorted halves
Find pairs of integers in a BST whose sum is equal to a given number.
Traverse the BST and store the values in a hash set.
For each node, check if (X - node.value) exists in the hash set.
If yes, add the pair (node.value, X - node.value) to the result.
Continue traversal until all nodes are processed.
Merge overlapping time intervals into mutually exclusive intervals.
Sort the intervals based on their start time.
Iterate through the intervals and merge overlapping intervals.
Output the mutually exclusive intervals.
Example: [(1,3), (2,6), (8,10), (15,18)] -> [(1,6), (8,10), (15,18)]
Different types of hashing and alternative for Linear Chaining
Different types of hashing include division, multiplication, and universal hashing
Alternative for Linear Chaining is Open Addressing
Open Addressing includes Linear Probing, Quadratic Probing, and Double Hashing
An AVL tree is a self-balancing binary search tree where the heights of the left and right subtrees differ by at most one.
AVL tree is a binary search tree with additional balance factor for each node.
The balance factor is the difference between the heights of the left and right subtrees.
Insertion and deletion operations in AVL tree maintain the balance factor to ensure the tree remains balanced.
Rotations are performed ...
Find the minimum number of squares whose sum equals to a given number n.
Use dynamic programming to solve the problem efficiently.
Start with finding the square root of n and check if it is a perfect square.
If not, then try to find the minimum number of squares required for the remaining number.
Repeat the process until the remaining number becomes 0.
Return the minimum number of squares required for the given number n.
Insertion sort for a singly linked list.
Traverse the list and compare each node with the previous nodes
If the current node is smaller, swap it with the previous node
Repeat until the end of the list is reached
Time complexity is O(n^2)
I applied via Naukri.com and was interviewed in May 2019. There were 4 interview rounds.
based on 2 interviews
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