300+ Axens India Interview Questions and Answers

Sort the individual digits of a 10 digit number.

• Convert the number to a string to access individual digits

• Use a sorting algorithm to sort the digits

• Convert the sorted digits back to a number

When faced with an unsolvable problem, I break it down, research, seek help, experiment, and iterate until a solution is found.

• Break down the problem into smaller, manageable parts

• Research and gather information related to the problem

• Seek help from colleagues, online communities, or experts

• Experiment with different approaches or solutions

• Iterate and refine the solution based on feedback and results

A DBMS for managing college faculty, professors, courses, and students.

• The DBMS should have tables for faculty, professors, courses, and students.

• Each table should have appropriate attributes to store relevant information.

• Relationships can be established between tables using foreign keys.

• Queries can be used to retrieve information about faculty, professors, courses, and students.

• The DBMS can be used to track enrollment, grades, and other relevant data.

The code for finding the Lowest Common Ancestor (LCA) in a Binary Search Tree (BST).

• Start from the root node and compare it with the given two nodes.

• If both nodes are smaller than the current node, move to the left subtree.

• If both nodes are greater than the current node, move to the right subtree.

• If one node is smaller and the other is greater, then the current node is the LCA.

• Continue this process until the LCA is found.

Design a parking lot with Logic Flow Diagram, E-R diagram, DB tables with relations, and commands for transactions.

• Identify the types of vehicles that will use the parking lot

• Determine the number of parking spaces needed for each vehicle type

• Create a flow diagram to show the process of entering and exiting the parking lot

• Design an E-R diagram to show the relationships between entities such as vehicles, parking spaces, and transactions

• Normalize the DB tables to reduce redundan...read more

Sort an array by moving all zeroes to the end.

• Iterate through the array and move all non-zero elements to the front.

• Count the number of zeroes encountered and append them at the end of the array.

• Use two pointers to swap elements and maintain the order.

WAP to generate a matrix from a given tree.

• Create a 2D array to store the matrix

• Traverse the tree and fill the matrix accordingly

• Use BFS or DFS to traverse the tree

• The matrix will be symmetric along the diagonal

Function to check if a checkbox is checked in JavaScript

• Use the 'checked' property of the checkbox element

• Access the checkbox element using its ID or class name

• Return true if checked, false if not checked

Java is platform-independent and uses automatic memory management, while C++ is faster and allows for more control over memory.

• Java is compiled to bytecode and runs on a virtual machine, while C++ is compiled to machine code.

• Java has automatic memory management through garbage collection, while C++ requires manual memory management.

• Java has a simpler syntax and is easier to learn, while C++ has more complex syntax and is more difficult to master.

• Java is used for web developme...read more

List is preferred when frequent insertion and deletion is required. Vector is preferred when random access is required.

• List is implemented as a doubly-linked list, allowing for efficient insertion and deletion at any position.

• Vector is implemented as a dynamic array, allowing for efficient random access.

• Use List when the number of elements is expected to change frequently and the order of elements matters less.

• Use Vector when the number of elements is fixed or changes infrequ...read more

Polymorphism can be achieved through method overloading, method overriding, and interfaces. Multiple inheritance can be solved using interfaces.

• Method overloading allows multiple methods with the same name but different parameters

• Method overriding allows a subclass to provide its own implementation of a method already defined in its superclass

• Interfaces provide a way to achieve multiple inheritance by allowing a class to implement multiple interfaces

• Diamond problem in multipl...read more

Polymorphism is the ability of an object to take on many forms. It allows objects of different classes to be treated as the same type.

• Polymorphism allows a single interface to be used for different types of objects.

• It enables code reusability and flexibility in object-oriented programming.

• For example, a parent class 'Animal' can have multiple child classes like 'Dog', 'Cat', and 'Bird'. They can all be treated as 'Animal' objects.

• Each child class can have its own implementati...read more

Query to find player with maximum runs in a match on given date and venue

• Use MAX() function to find maximum runs

• Join tables for player name, match details and runs scored

• Filter by given date and venue

• Order by runs scored and limit to 1 result

Polymorphism refers to the ability of an object to take on many forms. The diamond problem occurs in multiple inheritance.

• Polymorphism can be achieved through method overloading and method overriding.

• Method overloading allows multiple methods with the same name but different parameters.

• Method overriding occurs when a subclass provides a specific implementation of a method already defined in its superclass.

• The diamond problem arises in languages that support multiple inheritan...read more

To handle a team, identify areas of improvement for each team member and get approval from the Director.

• Regularly communicate with team members to understand their strengths and weaknesses.

• Provide constructive feedback and coaching to help team members improve.

• Set clear goals and expectations for each team member.

• Encourage collaboration and teamwork within the team.

• Get approval from the Director before implementing any major changes or improvements.

Foreign key is a column in a table that refers to the primary key of another table.

• It establishes a relationship between two tables.

• It ensures referential integrity.

• It can be null, but only if it is defined as nullable.

• It helps in joining tables.

• Example: Customer table has a foreign key to the Order table's primary key.

• Example: Order table's foreign key can be null if the order has not been placed by any customer yet.

Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.

• Normalization involves breaking down a database into smaller, more manageable tables.

• It helps to eliminate data redundancy and inconsistencies.

• Normalization ensures that each table has a primary key and that data is stored in a logical and consistent manner.

• It improves data integrity and reduces the likelihood of errors and inconsistencies.

• Normalization is important f...read more

Normalized form is better for data consistency and scalability.

• Normalized form reduces data redundancy and ensures data consistency.

• Normalized form allows for easier scalability and maintenance.

• Single table/2 tables may be appropriate for small, simple datasets.

• Normalized form may require more complex queries to retrieve data.

• Normalized form may require more storage space due to additional tables.

• Example: Normalized form for a customer database would have separate tables for ...read more

Linux is an open-source operating system known for its stability, security, and flexibility.

• Linux is a Unix-like operating system that was developed as a free and open-source software.

• It provides a stable and secure environment for running applications and services.

• Linux supports a wide range of hardware architectures and has a large community of developers and users.

• It offers a command-line interface, as well as various graphical user interfaces.

• Linux is highly customizable ...read more

The shortest time needed for all four people to cross the bridge is 17 minutes.

• First, the 1 min and 2 min person cross the bridge (2 mins).

• Then, the 1 min person goes back with the torch (1 min).

• Next, the 7 min and 10 min person cross the bridge (10 mins).

• Finally, the 2 min person goes back with the torch (2 mins).

• Total time taken: 2 + 1 + 10 + 2 = 17 minutes.

I am confident in developing arrays, linked lists, and hash tables.

• Arrays are simple and efficient for storing and accessing data.

• Linked lists are useful for dynamic data structures and efficient insertion/deletion.

• Hash tables provide fast access to data with key-value pairs.

Linux Shell is a command-line interpreter that allows users to interact with the operating system. There are various types of shells in Linux.

• Linux Shell is a program that interprets user commands and executes them.

• It provides a command-line interface for users to interact with the Linux operating system.

• Shells can be used to run scripts, automate tasks, and manage system resources.

• Some popular shells in Linux are Bash (Bourne Again SHell), C Shell (csh), Korn Shell (ksh), an...read more

Find the minimum and maximum values in an array in a single traversal.

• Initialize min and max variables with the first element of the array

• Iterate through the array and update min and max if a smaller or larger value is found

• Return the min and max values

String class is immutable in Java to ensure security, thread-safety, and performance.

• Immutable objects are thread-safe as they cannot be modified by multiple threads simultaneously.

• Immutable objects are also secure as they cannot be modified by malicious code.

• String pool is possible because of immutability, which improves performance by reducing memory usage.

• StringBuffer and StringBuilder classes are used for mutable string operations.

C++ is a programming language. Deep copy creates a new object and copies all values, while shallow copy creates a reference to the original object.

• C++ is a general-purpose programming language

• Deep copy creates a new object with its own copy of the data

• Shallow copy creates a reference to the original object

• Deep copy is safer but can be slower and consume more memory

• Shallow copy is faster but can lead to unexpected behavior if the original object is modified

The 'finally' block in Java is used to execute code after try-catch blocks, even if an exception is thrown.

• The 'finally' block is always executed, regardless of whether an exception is thrown or caught.

• It is used to release resources like database connections, network connections, etc.

• If the JVM exits while the try or catch code is being executed, then the 'finally' block may not execute.

• If the thread executing the try or catch code is interrupted or killed, the 'finally' blo...read more

Count pairs of numbers where ending digit of ith number equals starting digit of jth number.

• Iterate through each pair of numbers in the list

• Check if the ending digit of the ith number equals the starting digit of the jth number

• Increment the count if the condition is met

Given a chessboard, find the maximum number of squares present.

• Start with the smallest square and count all possible squares

• Use the formula n*(n+1)*(2n+1)/6 to find the total number of squares in an n x n chessboard

• Add up the squares of all sizes from 1 to n to get the maximum number of squares

• For example, an 8 x 8 chessboard has 204 squares

The program should differentiate between integers and characters when using the assignment operator (=).

• Check the data type of the variable before assigning a value.

• Use conditional statements to perform different actions based on the data type.

• For integers, assign the value directly. For characters, convert the character to its ASCII value and assign it.

Yes, a unique key can be a primary key.

• A primary key is a unique identifier for a record in a table.

• A unique key is a constraint that ensures the values in a column are unique.

• A unique key can be used as a primary key if it meets the requirements.

• A primary key cannot have NULL values, while a unique key can have one NULL value.

Implementing a queue using stack involves using two stacks to simulate the behavior of a queue.

• Create two stacks, one for enqueue and one for dequeue operations.

• For enqueue operation, push the element onto the enqueue stack.

• For dequeue operation, if the dequeue stack is empty, pop all elements from the enqueue stack and push onto the dequeue stack.

• Pop the top element from the dequeue stack for dequeue operation.

I would use load balancing, caching, and scaling techniques to manage the 1 million requests.

• Implement load balancing to distribute requests evenly across multiple servers.

• Utilize caching to store frequently accessed data and reduce response times.

• Scale horizontally by adding more servers to handle the increased load.

• Optimize code and database queries to improve performance.

• Monitor system performance and make adjustments as needed.

The maximum number of squares on a chessboard is 64.

• The chessboard has 64 squares in total.

• The number of squares on a chessboard can be calculated using the formula n^2, where n is the number of rows or columns.

• In this case, n = 8 (8 rows and 8 columns), so the maximum number of squares is 8^2 = 64.

To find min and max of an array in one traversal, initialize min and max to first element and compare with rest.

• Initialize min and max to first element of array

• Traverse the array and compare each element with min and max

• Update min and max accordingly

• Return min and max

Process states in Linux refer to the different states that a process can be in during its execution.

• The process states in Linux include running, waiting, sleeping, stopped, and zombie.

• Running state indicates that the process is currently being executed by the CPU.

• Waiting state means that the process is waiting for a particular event or resource to become available.

• Sleeping state occurs when a process voluntarily gives up the CPU and waits for a specific condition to be satisf...read more

Find the repeated number in a list of contagious numbers.

• Iterate through the list and keep track of the numbers seen so far

• If a number is already seen, it is the repeated number

• Use a hash set or dictionary to efficiently check for duplicates

• If the list is sorted, use two pointers to find the repeated number

SUM will use a single SUM tool for the migration from SQL DB on Windows to HANA DB on Linux.

• SUM tool is platform-independent and can be used for migrations between different operating systems.

• The SUM tool will handle the conversion process seamlessly without the need for separate tools for Windows and Linux.

• The migration process will involve steps to convert the database from SQL to HANA while also transitioning the operating system from Windows to Linux.

The given string needs to be reversed and the words need to be rearranged.

• Split the string into an array of words

• Reverse the array

• Join the array elements with a space in between

Deep copy creates a new object with a new memory address, while shallow copy creates a new reference to the same memory address.

• Deep copy duplicates the object and all its nested objects, while shallow copy only duplicates the top-level object.

• Deep copy is slower and more memory-intensive than shallow copy.

• Shallow copy can lead to unexpected behavior if the original object is modified.

• In Python, deep copy can be achieved using the deepcopy() function from the copy module, whi...read more

I would empathize with the client and offer solutions to address their frustrations.

• Listen actively to their concerns and acknowledge their frustrations

• Offer alternative solutions that can improve their current situation

• Provide examples of successful implementations with similar clients

• Assure them that their satisfaction is a top priority

• Collaborate with them to create a customized plan that meets their specific needs

To download an attachment from an email, you need to open the email, locate the attachment, click on it, and then choose the option to download it.

• Open the email containing the attachment

• Locate the attachment within the email

• Click on the attachment to open it

• Choose the option to download the attachment

• Save the attachment to your desired location on your device