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AT&T Full Stack Developer Interview Questions and Answers
AT&T Full Stack Developer Interview Experiences
1 interview found
(2 Questions)
- Q1. Difference between streams and parallel streams
- Ans.
Streams process elements sequentially, while parallel streams process elements concurrently.
Streams process elements one by one in a sequential manner.
Parallel streams process elements concurrently, potentially utilizing multiple threads for faster processing.
Streams are suitable for smaller datasets or when order matters.
Parallel streams are more efficient for larger datasets or when order is not important.
Example: St...
- Q2. What is Static keyword in Java do?
- Ans.
Static keyword in Java is used to create class-level variables and methods that can be accessed without creating an instance of the class.
Static variables are shared among all instances of a class.
Static methods can be called without creating an object of the class.
Static keyword can be used to initialize a variable only once.
Example: public static int count = 0;
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Full Stack Developer Interview Questions & Answers
Tata Communications
Anonymous
posted on 29 Nov 2022
(9 Questions)
- Q1. What is CSS3 flexbox
- Ans.
CSS3 flexbox is a layout module that provides a more efficient way to align and distribute space among items in a container.
Flexbox allows for flexible and responsive layouts without using floats or positioning.
It uses a parent container and child elements with flexible properties to create the layout.
Properties include justify-content, align-items, and flex-wrap.
Flexbox is supported by all modern browsers.
Example:
- Q2. What is position property in CSS3
- Ans.
Position property in CSS3 is used to set the position of an element relative to its parent or the viewport.
The position property can take values like static, relative, absolute, fixed, and sticky.
Static is the default value and elements are positioned according to the normal flow of the document.
Relative positions the element relative to its normal position.
Absolute positions the element relative to its nearest positio...
- Q3. What is Closure in JS
- Ans.
Closure is a function that has access to its parent scope even after the parent function has returned.
Closure allows for private variables and functions in JavaScript.
It is created when a function returns another function.
The inner function has access to the outer function's variables and parameters.
Example: function outer() { let x = 10; return function inner() { console.log(x); } }
Example: const innerFunc = outer();
- Q4. What is Prototype in JS
- Ans.
Prototype is a property of an object that allows adding new properties and methods to an object.
Prototype is a blueprint for creating objects
It allows inheritance by sharing properties and methods between objects
Modifying the prototype affects all objects created from it
Prototype chain allows accessing properties and methods of parent objects
Example: Array.prototype includes() method
- Q5. What is Pipe in Angular
- Ans.
Pipe is a feature in Angular that allows transforming data before displaying it in the view.
Pipes are used to format and manipulate data in Angular templates.
They can be used to filter, sort, and transform data.
Pipes can be chained together to perform multiple transformations.
Angular provides built-in pipes like DatePipe, CurrencyPipe, and LowerCasePipe.
Custom pipes can also be created to meet specific requirements.
- Q6. What is directive in angular
- Ans.
A directive is a component that adds behavior to an existing element or component in Angular.
Directives are used to manipulate the DOM, add event listeners, and create reusable components.
There are three types of directives in Angular: component, attribute, and structural.
Examples of built-in directives in Angular include ngIf, ngFor, and ngStyle.
Custom directives can be created using the @Directive decorator.
- Q7. What is component in angular
- Ans.
A component in Angular is a reusable piece of UI that consists of HTML, CSS, and TypeScript code.
Components are the building blocks of Angular applications.
Each component has its own logic and view.
Components can be nested within other components.
Components can communicate with each other using @Input and @Output decorators.
Examples of components include a login form, a navigation menu, and a product list.
- Q8. What is rxjs observables in nagular
- Ans.
Observables are a way to handle asynchronous data streams in Angular using RxJS library.
Observables are similar to promises but can handle multiple values over time.
They can be used for handling events, HTTP requests, and other asynchronous operations.
Operators can be used to transform, filter, and combine observables.
Subscriptions are used to listen to observables and receive data.
Example: fetching data from an API us
- Q9. What is event loop lifecycle
- Ans.
Event loop is a continuous process that runs in the background and handles all the events in the application.
Event loop continuously checks for new events in the event queue.
It processes each event one by one in a synchronous manner.
If an event takes too long to process, it can block the event loop and cause the application to freeze.
Event loop can be controlled using setTimeout(), setInterval(), and setImmediate() met...
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Full Stack Developer Interview Questions & Answers
Bharti Airtel
Prathamesh Patil
posted on 20 Sep 2023
I applied via Shine and was interviewed before Sep 2022. There were 3 interview rounds.
It is very easy. Practice daily on Indiabix
I was given 2-3mins yo speak on the topic. It was is Indian Education system needs modification. Be confident while speaking.
I applied via Naukri.com and was interviewed in Nov 2024. There was 1 interview round.
(2 Questions)
- Q1. Sql related ques mege into, rank,dense rank,queries of joins etc.
- Q2. Java 8 related ques optional and stream
I applied via Naukri.com and was interviewed in Jul 2024. There were 2 interview rounds.
2 programmings on problem solving+ some mcqs on Java + spring boot+ mysql
(4 Questions)
- Q1. Streams question to find the count of integers in a list and return it as 1 : 5, 2 : 3, ..
- Q2. Solid principles + spring theory different questions like jsonignore, pathvaroables, asynchronous communications, normalisation, etc.
- Q3. Questions on core java like oops, final,static, collections, generics
- Q4. Questions on project and each part of your services
Interview Preparation Tips
Tushar Jamdar
(3 Questions)
- Q1. What is different between Mysql Vs sql ?
- Ans.
MySQL is a specific implementation of SQL, which is a standardized language for managing databases.
MySQL is a specific relational database management system (RDBMS) that uses SQL as its query language.
SQL (Structured Query Language) is a standardized language for managing databases, used by various RDBMS like MySQL, Oracle, and SQL Server.
MySQL is open-source and free to use, while some other RDBMS like Oracle may requ...
- Q2. What abstraction and interface in java?
- Ans.
Abstraction and interface are key concepts in Java for achieving abstraction and defining contracts for classes.
Abstraction in Java is achieved using abstract classes and interfaces.
Abstract classes can have both abstract and concrete methods, while interfaces can only have abstract methods.
Interfaces define contracts that classes must implement, allowing for polymorphism and loose coupling.
Example: interface Shape { v...
- Q3. What is mean by JSP?
- Ans.
JSP stands for JavaServer Pages, a technology used for creating dynamic web pages.
JSP allows embedding Java code in HTML pages
It simplifies the process of creating dynamic web content
JSP files are compiled into servlets by the server for execution
Skills evaluated in this interview
(2 Questions)
- Q1. Reverse a linked list.
- Q2. Merge sort on a array/
Jack Sparrow
(2 Questions)
- Q1. What is method overloading and overriding
- Ans.
Method overloading is when multiple methods have the same name but different parameters. Method overriding is when a subclass provides a specific implementation of a method that is already provided by its superclass.
Method overloading allows a class to have multiple methods with the same name but different parameters.
Method overriding occurs in a subclass when a method has the same name, return type, and parameters as ...
- Q2. Program to swap two variables without using third
- Ans.
Swapping two variables without using a third variable
Use XOR operation to swap two variables without using a third variable
Example: a = 5, b = 10; a = a ^ b; b = a ^ b; a = a ^ b; // Now a = 10, b = 5
(2 Questions)
- Q1. Why you want to join this organization
- Ans.
I am impressed by the organization's innovative projects and collaborative work culture.
Impressed by innovative projects
Attracted to collaborative work culture
Excited about potential for growth and learning opportunities
- Q2. What is your weakness and strength
- Ans.
My weakness is overthinking and my strength is attention to detail.
Weakness: tend to overthink situations, which can lead to indecision or unnecessary stress
Strength: strong attention to detail, ensuring accuracy and quality in my work
Example: I sometimes spend too much time analyzing a problem before taking action, but I have learned to set deadlines for myself to prevent this from affecting my productivity
(2 Questions)
- Q1. What are the things that u do when your what app screen is blank
- Ans.
I would check for internet connection, restart the app, clear cache, and update the app.
Check internet connection
Restart the app
Clear cache
Update the app
- Q2. Simple python code
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Software Developer Interview Questions & Answers
Motorola Solutions
Subhash billakurthi
posted on 4 Oct 2024
I applied via Campus Placement
Based on python and also question included networking
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