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Blue Star Air Travel Services
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Blue Star Air Travel Services Interview Questions and Answers
Blue Star Air Travel Services Interview Experiences
1 interview found
Anonymous
Interview Questionnaire
1 Question
- Q1. What's your pet name
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Interview Questionnaire
17 Questions
- Q1. Find if a string is substring of other string
- Ans.
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.
- Q2. Write a code to multiply two matrices of dimension M*N and N*K
- Ans.
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.
...
- Q3. Write a Sql to perform Matrix Multiplication.Two tables has three columns row,col and value
- Ans.
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.
- Q4. What is prototype in javascript?
- Ans.
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
- Q5. How do we write classes in javascript?
- Ans.
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.
- Q6. There is a ladder of N steps.We can either take 1 step or 2 steps.In how many different ways one can climb the ladder?
- Ans.
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
- Q7. Print a square matrix in spiral order
- Ans.
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
- Q8. Given a table with 3 columns StudentName,Subject and Marks.Write a sql to retrieve second highest Marks Obtained for each student
- Ans.
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.
- Q9. Given a Website with header,footer,side ads(Google ads,Internal ads).How will you extract only useful data from the page
- Q10. Difference between .live() and .delegate() in jquery
- Ans.
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:...
- Q11. What is chaining in jquery?
- Ans.
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();
- Q12. What is callback function?
- Ans.
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);
- Q13. What is .bind() function in jquery?
- Ans.
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
- Q14. Find the angle between hour handle and minute handle in a clock
- Ans.
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.
- Q15. Is it possible to create slideshow without using javascript
- Ans.
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.
- Q16. Questions about my current project and academic project
- Q17. Given two points A and B with distance between them lets say D.there are N men who want to go from point A to point B.All men walk with same speed.They also have one scooter with them which has speed grea...
- Ans.
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.
Interview Preparation Tips
College Name: na
Skills evaluated in this interview
I was interviewed before Feb 2021.
(3 Questions)
Round duration - 90 minutes
Round difficulty - Medium
Questions on aptitude, English, logical reasoning, C/C++ and 5 coding ques. (only pseudo code).
- Q1.
Minimum Jumps Problem Statement
Bob and his wife are in the famous 'Arcade' mall in the city of Berland. This mall has a unique way of moving between shops using trampolines. Each shop is laid out in a st...
- Ans.
Find the minimum number of trampoline jumps Bob needs to make to reach the final shop, or return -1 if it's impossible.
Use Breadth First Search (BFS) algorithm to find the minimum number of jumps required.
Keep track of the visited shops to avoid revisiting them.
If a shop has an Arr value of 0, it is impossible to reach the final shop.
Return -1 if the final shop cannot be reached.
- Q2.
Smallest Window Problem Statement
Given two strings,
SandX, your task is to find the smallest substring inSthat contains all the characters present inX.Example:
Input:
S = "abdd", X = "bd"
Outpu...
- Ans.
Find the smallest substring in S that contains all characters in X.
Use a sliding window approach to find the smallest window in S containing all characters of X.
Maintain a hashmap to keep track of characters in X and their frequencies in the current window.
Slide the window to the right, updating the hashmap and shrinking the window until all characters in X are present.
Return the smallest window found.
Example: S = 'abd
- Q3.
Rat in a Maze Problem Statement
You need to determine all possible paths for a rat starting at position (0, 0) in a square maze to reach its destination at (N-1, N-1). The maze is represented as an N*N ma...
- Ans.
Find all possible paths for a rat in a maze from start to destination.
Use backtracking to explore all possible paths in the maze.
Keep track of visited cells to avoid revisiting them.
Return paths in alphabetical order as a list of strings.
(3 Questions)
Round duration - 60 minutes
Round difficulty - Easy
Questions based on OOPS were asked in this round.
- Q1. What is a virtual function?
- Ans.
A virtual function is a function in a base class that is declared using the keyword 'virtual' and can be overridden by a function with the same signature in a derived class.
Virtual functions allow for dynamic polymorphism in C++
They are used in inheritance to achieve runtime polymorphism
Virtual functions are declared in a base class and can be overridden in derived classes
They are called based on the type of object bei...
- Q2. What are the types of polymorphism in Object-Oriented Programming?
- Ans.
Types of polymorphism in OOP include compile-time (method overloading) and runtime (method overriding) polymorphism.
Compile-time polymorphism is achieved through method overloading, where multiple methods have the same name but different parameters.
Runtime polymorphism is achieved through method overriding, where a subclass provides a specific implementation of a method that is already defined in its superclass.
Polymor...
- Q3. What is the difference between deep copy and shallow copy?
- Ans.
Deep copy creates a new object and recursively copies all nested objects, while shallow copy creates a new object and copies only the references to nested objects.
Deep copy creates a new object and copies all nested objects, while shallow copy creates a new object and copies only the references to nested objects.
In deep copy, changes made to the original object do not affect the copied object, while in shallow copy, ch...
Round duration - 30 minutes
Round difficulty - Easy
HR round with typical behavioral problems.
Interview Preparation Tips
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
Skills evaluated in this interview
Interview Preparation Tips
Skills: Java, Data structures, Algorithm
College Name: na
Interview Preparation Tips
Experience: 1. Rotate a matrix by 90 degrees clockwise.( He asked me have you heard of question.I said Yes.Then he asked me to code)2. Find vertical sum of nodes present in same vertical line in binary tree. ( He again asked me have you heard of question. I have heard it but didn’t remember the approach. It took some time and then I started telling my approach.He aasked me to write code and question regarding get sums from left to right , for which I made use of linked hashmap)
Overall It was very cool for me
Total Questions: 2
Round: Test
Experience: 1.Reverse K blocks of nodes in linked list.There are two interviewers this time, probably, guy was senior he was asking me question.He was very particular in coding. Checked every edge case.and asked me evrything.Initially I told the approach and then started coding.2.Find min in stack in O(1)Pretty straightforward written code.Again he checked all edge cases with my code.3. Then asked about counting sort and its code.4. And a simple question on array sorting.
Round: HR Interview
Experience: I thought this was last round as they have said like.She asked me about my strengths and challenges I faced.How I overcame through it1.Basic question on oops concepts.(runtime polymorphism).
2.Design tables for getting all employees under manager. I screwed it little bit.But some how I got answer which I was not satisfied as well.I was expecting result either yes/no.But they called me for another round of interview may be because of my expected salary which was high compared to my previous.
Round: Technical Interview
Experience: 1.Given “aaabbbccc” it should return “a3b3c3″ in place. Initially I explained brute force approach then he said array has 2n space.I was able to remember approach for quicksort and started explaining after which I grew confident on it.He was satisfied.Questions on time complexity of algo and space complexity discussions.2.Again a question on OOPs.This time I was completely wrong in answering it.I thought interview with yatra was closing for me.He was not satisified much with this.Luckily, there was another round with manager.
Round: Other Interview
Experience: 1.He asked me to find words which are having particular pattern.Then I said it was KMP algo. Can I explain it ?? I started explaining approach, may be he was busy with something, he asked me to write pseudo code.He left the room for 15 mins then he came back I had almost completed the code, which he was satisified.Some basic questions on spring ( my previous work was related to it). Then my expected salary and my position If I got selected in yatra were discussed.
College Name: NA
Interview Questionnaire
8 Questions
- Q1. Find out the subset of an array of continuous positive numbers from a larger array whose sum of of the elements is larger in comparision to other subset. eg: {1,2 5 -7, 2 5} .The two subarrays are {1,2,5} ...
- Ans.
Find the subset of an array with the largest sum of continuous positive numbers.
Iterate through the array and keep track of the current sum and the maximum sum seen so far.
If the current element is positive, add it to the current sum. If it is negative, reset the current sum to 0.
Also keep track of the start and end indices of the maximum sum subset.
Return the subset using the start and end indices.
- Q2. Given two classes C1 and C2 which are almost same.(remember not exactly same). You want to choose best among these classes so that it can be use as key in hashmap. What question will you ask regarding two ...
- Q3. You are given two strings s1 and s2.Now, find the smallest substring in s1 containing all characters of s2
- Ans.
Find smallest substring in s1 containing all characters of s2.
Create a hash table of characters in s2
Use sliding window technique to find smallest substring in s1
Check if all characters in s2 are present in the substring
Update the smallest substring if a smaller one is found
- Q4. Questions on OOPS (almost all the concepts were covered like polymorphism, overriding, overloading, inheritance, concept of virtual fxns etc.)
- Q5. Write algo for reversing a linked list
- Ans.
Algorithm to reverse a linked list
Create a new empty linked list
Traverse the original linked list and insert each node at the beginning of the new list
Return the new list
- Q6. What is lazy loading? Advantages and disadvantages of the same?
- Ans.
Lazy loading is a technique used to defer the loading of non-critical resources until they are needed.
Advantages: faster initial page load, reduced bandwidth usage, improved user experience
Disadvantages: increased complexity, potential for slower subsequent page loads, difficulty with SEO
Examples: images, videos, and other media files can be loaded only when they are visible on the screen
- Q7. How ajax works? Difference between angular js and jquery?
- Ans.
Ajax is a technique for creating fast and dynamic web pages. AngularJS is a framework for building dynamic web applications, while jQuery is a library for simplifying HTML DOM traversal and manipulation.
Ajax stands for Asynchronous JavaScript and XML
It allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes
AngularJS is a JavaScript framework that extends HTML with new attrib...
- Q8. Design a traffic light system?
- Ans.
A traffic light system controls the flow of traffic at intersections.
The system consists of three lights: red, yellow, and green.
Each light has a specific duration for which it stays on.
The system also includes sensors to detect the presence of vehicles and pedestrians.
The duration of each light can be adjusted based on traffic patterns.
The system can be connected to a central control system for remote monitoring and m
Interview Preparation Tips
College Name: na
Skills evaluated in this interview
I was interviewed before Feb 2021.
(3 Questions)
Round duration - 60 minutes
Round difficulty - Easy
Technical round with 3 problems based on DSA and Algorithms.
- Q1.
Smallest Integer Not Representable as Subset Sum
Given a non-decreasing sorted array
ARRofNpositive numbers, determine the smallest positive integer that cannot be expressed as the sum of elements from... - Ans.
Find the smallest positive integer that cannot be expressed as the sum of elements from any proper subset of a given array.
Sort the array in non-decreasing order.
Iterate through the array and keep track of the smallest sum that can be formed.
If the next element in the array is greater than the current sum + 1, then the answer is the current sum + 1.
Return the answer as the smallest integer not representable as a subset
- Q2.
Reverse Linked List Problem Statement
Given a singly linked list of integers, return the head of the reversed linked list.
Example:
Initial linked list: 1 -> 2 -> 3 -> 4 -> NULL
Reversed link... - Ans.
Reverse a singly linked list of integers and return the head of the reversed linked list.
Iterate through the linked list and reverse the pointers to point to the previous node instead of the next node.
Use three pointers to keep track of the current, previous, and next nodes while reversing the linked list.
Update the head of the reversed linked list to be the last node encountered during the reversal process.
- Q3.
Smallest Window Problem Statement
Given two strings
SandXcontaining random characters, the task is to find the smallest substring inSwhich contains all the characters present inX.Input:
The first... - Ans.
The task is to find the smallest substring in string S which contains all the characters present in string X.
Iterate through string S and keep track of characters in X using a hashmap
Use two pointers to maintain a sliding window and find the smallest window containing all characters in X
Return the smallest window found
(1 Question)
Round duration - 60 minutes
Round difficulty - Easy
Technical round with questions based on OOPS and Angular.
- Q1. What are the different OOP concepts?
- Ans.
OOP concepts include inheritance, encapsulation, polymorphism, and abstraction.
Inheritance allows a class to inherit properties and behavior from another class.
Encapsulation restricts access to certain components of an object, protecting its integrity.
Polymorphism allows objects to be treated as instances of their parent class.
Abstraction hides the complex implementation details of an object and only shows the necessar
(3 Questions)
Round duration - 60 minutes
Round difficulty - Easy
Questions based on System Design, ajax, jquery were asked.
- Q1. How would you design a traffic light system?
- Ans.
Designing a traffic light system involves creating a system that controls the flow of traffic at intersections.
Divide the traffic light system into three main lights: red, yellow, and green.
Implement timers to control the duration of each light.
Include sensors to detect the presence of vehicles and pedestrians.
Consider implementing a pedestrian crossing signal.
Integrate a central control system to coordinate the timing
- Q2. How does AJAX work?
- Ans.
AJAX allows for asynchronous communication between client and server without needing to reload the entire page.
AJAX stands for Asynchronous JavaScript and XML.
It allows for sending and receiving data from a server without reloading the entire page.
AJAX uses XMLHttpRequest object to make requests to the server.
It can update parts of a web page without requiring a full page reload.
Commonly used in web applications to pro
- Q3. What is the difference between AngularJS and jQuery?
- Ans.
AngularJS is a full-fledged MVC framework for building dynamic web applications, while jQuery is a lightweight library for DOM manipulation and event handling.
AngularJS is a full-fledged MVC framework, providing features like two-way data binding, dependency injection, and routing.
jQuery is a lightweight library primarily used for DOM manipulation and event handling.
AngularJS is suitable for building single-page applic...
Interview Preparation Tips
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
Skills evaluated in this interview
I was interviewed before Feb 2021.
(1 Question)
Round duration - 65 minutes
Round difficulty - Easy
There were 2 sections –
Aptitude and Logical Reasoning and MCQ based on Java question ,C++, coding for 20 min and 45 min respectively.
Section A- Not very difficult to clear this round although less time was a problem.
Section B- It contains 15 multiple choice question on c/c++,java and 4 simple coding questions
- Q1.
Cycle Detection in a Singly Linked List
Determine if a given singly linked list of integers forms a cycle or not.
A cycle in a linked list occurs when a node's
nextpoints back to a previous node in the ... - Ans.
Detect if a singly linked list forms a cycle by checking if a node's next pointer points back to a previous node.
Traverse the linked list using two pointers, one moving at double the speed of the other.
If the two pointers meet at any point, there is a cycle in the linked list.
Use Floyd's Cycle Detection Algorithm for O(N) time complexity and O(1) space complexity.
(3 Questions)
Round duration - 75 minutes
Round difficulty - Medium
It was an online coding test in which 3 coding question were given.
- Q1.
Smallest Window Problem Statement
Given two strings,
SandX, your task is to find the smallest substring inSthat contains all the characters present inX.Example:
Input:
S = "abdd", X = "bd"
Outpu...
- Ans.
Find the smallest substring in string S that contains all characters in string X.
Iterate through string S and keep track of characters in X found in a window
Use two pointers to maintain the window and slide it to find the smallest window
Return the smallest window containing all characters in X
- Q2.
Smallest Integer Not Representable as Subset Sum
Given a non-decreasing sorted array
ARRofNpositive numbers, determine the smallest positive integer that cannot be expressed as the sum of elements from... - Ans.
Find the smallest positive integer that cannot be expressed as the sum of elements from any proper subset of a non-decreasing sorted array of positive numbers.
Start with the smallest possible integer that cannot be represented, which is 1.
Iterate through the array and update the smallest integer that cannot be represented.
If the current element is greater than the smallest integer that cannot be represented, return tha...
- Q3.
Minimum Steps for a Knight to Reach Target
Given a square chessboard of size 'N x N', determine the minimum number of moves a Knight requires to reach a specified target position from its initial position...
- Ans.
Calculate the minimum number of moves a Knight needs to reach a target position on a chessboard.
Implement a function that takes knight's starting position, target position, and chessboard size as input
Use breadth-first search algorithm to find the shortest path for the Knight
Consider all possible 8 movements of the Knight on the chessboard
Return the minimum number of moves required for the Knight to reach the target po
(4 Questions)
Round duration - 60 minutes
Round difficulty - Easy
It started with a discussion on the programs given in coding round. They asked me about my interest field after that they directly jumped into Networking, Linux and Ethical Hacking part looking my interest domain. They asked me various question on networking and linux.
Then they asked me to code a simple c program
- Q1.
Reverse Linked List Problem Statement
Given a singly linked list of integers, return the head of the reversed linked list.
Example:
Initial linked list: 1 -> 2 -> 3 -> 4 -> NULL
Reversed link... - Ans.
Reverse a singly linked list of integers and return the head of the reversed linked list.
Iterate through the linked list and reverse the pointers to point to the previous node.
Keep track of the current, previous, and next nodes while reversing the linked list.
Update the head of the reversed linked list as the last node encountered during reversal.
- Q2. What are the port numbers of protocols such as FTP and SMTP?
- Ans.
FTP uses port number 21 and SMTP uses port number 25.
FTP uses port 21 for data transfer and port 20 for control information.
SMTP uses port 25 for email communication.
Understanding port numbers is important for network communication.
- Q3. Can you explain the OSI Model?
- Ans.
The OSI Model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven layers.
The OSI Model stands for Open Systems Interconnection Model.
It consists of seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.
Each layer has specific functions and communicates with the adjacent layers.
Example: Layer 1 (Physical) deals with physi...
- Q4. How do you copy files in Linux?
- Ans.
To copy files in Linux, you can use the 'cp' command.
Use the 'cp' command followed by the source file and destination directory to copy a file.
To copy a directory and its contents, use the '-r' flag with the 'cp' command.
You can also use wildcards like '*' to copy multiple files at once.
Interview Preparation Tips
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
Skills evaluated in this interview
I applied via Other and was interviewed in Sep 2018. There were 3 interview rounds.
Interview Questionnaire
5 Questions
- Q1. As position was for UI developer. So first round was majorly based on HTML and CSS. They were checking the basic concepts.
- Q2. Questions from JavaScript. Major JavaScript concepts and logical questions.
- Q3. Main focus was on data structure, travel domain knowledge and optimisation techniques.
- Q4. Main purpose of this round was to check how updated a person is with new technologies, his willingness to learn new things and attitude towards work.
- Q5. General discussion and salary negotiation.
Interview Preparation Tips
Skills: GIT, Css, HTML, JavaScript, Communication
Duration: <1 week
Vickey Manwar
I applied via Company Website and was interviewed before Nov 2020. There was 1 interview round.
Interview Questionnaire
1 Question
- Q1. Oops concept, use of throws and exception, test cases for cash withdrawl at atm, booking ticket at railway test cases, spring boot annotations, jdbc questions, sql queries and programs on strings.
Interview Preparation Tips
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