Verizon Full Stack Software Developer Interview Questions and Answers

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...read more
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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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Q1. Questions related to Java , Java 8 Features ,Spring Boot and Microservices
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Q1. Technical Discussion covers all the topics
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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:
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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...read more
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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();
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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
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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.
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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.
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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.
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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
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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...read more
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Basic verbal and quants easy to medium level

Q1. Projects explanation, coding and logical thinking questions
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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.