Cygnet Infotech Interview Questions and Answers

Interface defines a contract for classes to implement, while abstract class can have both abstract and concrete methods.

• Interface can only have abstract methods and constants, while abstract class can have abstract and concrete methods.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Interfaces are used for achieving multiple inheritance in Java.

• Abstract classes can have insta...read more

Array is a fixed-size collection of elements, while ArrayList is a dynamic-size collection that can grow or shrink.

• Array has a fixed size, while ArrayList can dynamically resize.

• Array can only store elements of the same data type, while ArrayList can store elements of different data types.

• Array is faster for accessing elements, while ArrayList is slower due to its dynamic resizing.

• Array is a basic data structure i...read more

Latency time refers to the delay or time taken for a response or data to travel from its source to its destination.

• Latency time is the time delay between a request and a response.

• It is often measured in milliseconds (ms).

• Latency can be caused by various factors such as network congestion, processing time, or distance.

• High latency can result in slow response times and poor user experience.

• Examples of latency includ...read more

Probabilistic distributions describe the likelihood of different outcomes in a random variable.

• Probabilistic distributions show the probability of each possible outcome in a random variable

• Common types include normal, binomial, Poisson, and exponential distributions

• They are often used in statistics, machine learning, and AI to model uncertainty and make predictions

Sanity, smoke, and regression testing are performed at different stages of software development to ensure quality and stability.

• Sanity testing is performed after a small change or bug fix to ensure that the core functionality of the software is still intact.

• Smoke testing is performed to check the basic functionality of the software after a build or release.

• Regression testing is performed to ensure that the existin...read more

Creating XPath without attributes

• Use the element's position in the DOM hierarchy

• Use the element's text content

• Use the element's parent or sibling elements

• Use the element's CSS properties

• Use the element's tag name