10+ Tracxn Interview Questions and Answers

Multi role login system can be managed by assigning different access levels to each role.

• Create a database table for roles and their access levels

• Assign each user a role with corresponding access level

• Implement role-based access control (RBAC) to restrict access to certain features

• Use session management to keep track of user roles

• Provide an admin panel to manage roles and access levels

CSS methods for fixed headers and footers

• Use position: fixed property

• Set top or bottom property to 0 for fixed header/footer

• Add z-index property to ensure header/footer is on top

• Consider using padding or margin to avoid overlapping content

Data binding in Angular is a way to establish a connection between the UI and the application's data.

• Data binding allows automatic synchronization of data between the model and the view.

• It eliminates the need for manual DOM manipulation.

• There are different types of data binding in Angular, such as interpolation, property binding, event binding, and two-way binding.

• Interpolation: {{ data }}

• Property binding: [property]='data'

• Event binding: (event)='handler()'

• Two-way binding: [(...read more

Polymorphism is the ability of an object to take on many forms.

• Polymorphism allows objects of different classes to be treated as if they are of the same class.

• It is achieved through method overriding and method overloading.

• Example: A parent class Animal can have child classes like Dog, Cat, and Cow, each with their own unique implementation of the method 'makeSound'.

• Polymorphism makes code more flexible and reusable.

Merge multiple sorted arrays into one sorted array

• Merge all arrays into one array

• Sort the merged array

• Return the sorted array

Static service in Angular is used to share data between components and persists data even after the component is destroyed.

• Static service is a singleton service that can be injected into any component.

• It is used to share data between components.

• Data persists even after the component is destroyed.

• It is useful for sharing data between sibling components.

• Example: a shopping cart service that persists the cart data across different pages.

Software development life cycle is a process followed by software developers to design, develop and maintain software.

• SDLC consists of several phases such as planning, analysis, design, implementation, testing, deployment, and maintenance.

• Each phase has its own set of activities and deliverables.

• SDLC models include Waterfall, Agile, and DevOps.

• SDLC helps in ensuring that the software is developed efficiently, meets the requirements, and is of high quality.

• SDLC also helps in r...read more

Object-oriented programming concepts that help in organizing and designing code for reusability and maintainability.

• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Ability of a class to inherit properties and behavior from another class.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation details and showing only the necessary features to the user.

ACID properties are a set of properties that guarantee the reliability of database transactions.

• ACID stands for Atomicity, Consistency, Isolation, and Durability

• Atomicity ensures that all operations in a transaction are completed successfully or none at all

• Consistency ensures that the database remains in a consistent state before and after the transaction

• Isolation ensures that multiple transactions can run concurrently without affecting each other

• Durability ensures that once ...read more

A nested list is a list that contains other lists as its elements.

• Nested lists can be created using square brackets and separating the elements with commas.

• Elements of a nested list can be accessed using indexing and slicing.

• Example: my_list = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

• Accessing element 5: my_list[1][1]

An interface in software engineering is a contract that defines the methods that a class must implement.

• Interfaces in Java are used to achieve abstraction and multiple inheritance.

• Interfaces contain only method signatures, not method bodies.

• Classes can implement multiple interfaces in Java.

• Interfaces are used to define the behavior of a class without specifying how that behavior is implemented.

A queue is a data structure that follows the First In First Out (FIFO) principle.

• Elements are added to the back of the queue and removed from the front.

• Example: A line of people waiting for a movie ticket.

• Operations: Enqueue (add element to back), Dequeue (remove element from front), Peek (view front element)

Angular is a popular front-end framework for building dynamic web applications, while JavaScript is a programming language commonly used for web development.

• Angular is a front-end framework developed by Google for building single-page applications

• JavaScript is a programming language used for adding interactivity to web pages

• Angular uses TypeScript, a superset of JavaScript, for development

• JavaScript is widely used for client-side scripting and server-side development with Nod...read more

The optimal solution for generating Fibonacci series efficiently.

• Use dynamic programming to store previously calculated values to avoid redundant calculations.

• Implement a recursive function with memoization to store and reuse calculated values.

• Iterate through the series using a loop to generate Fibonacci numbers efficiently.