Snapwork Technology Interview Questions and Answers

The stateful widget lifecycle refers to the sequence of events that occur during the creation, updating, and destruction of a stateful widget.

• The lifecycle begins with the creation of the widget using the constructor.

• The initState() method is called after the widget is created, allowing initialization tasks.

• The build() method is called to build the widget's UI.

• When the widget is updated, the didUpdateWidget() method is...read more

Stateful widgets maintain state that can change over time, while stateless widgets do not.

• Stateful widgets can be updated and rebuilt multiple times, while stateless widgets are immutable.

• Stateful widgets are useful for UI elements that need to change dynamically, such as forms or animations.

• Stateless widgets are more efficient as they don't need to track changes or rebuild themselves.

• Examples of stateful widgets inclu...read more

AES encoding is a symmetric encryption algorithm used to secure sensitive data by transforming it into an unreadable format.

• AES stands for Advanced Encryption Standard

• It uses a fixed block size of 128 bits

• AES supports key sizes of 128, 192, and 256 bits

• It operates on a substitution-permutation network

• AES encryption involves several rounds of transformations

• It is widely used in various applications for data protection

Encryption is the process of converting data into a secret code, while encoding is the process of converting data into a different format.

• Encryption uses algorithms to scramble data, making it unreadable without a key.

• Encoding uses a specific format to represent data, but does not provide security.

• Encryption is reversible, while encoding is typically not reversible.

• Examples of encryption include AES, RSA, and DES.

• Examp...read more

Split a string into an array of strings and identify duplicates

• Use the split() method to split the string into an array of strings

• Iterate through the array and use a hashmap to keep track of duplicate strings

• Return the duplicate strings found