Cigniti Technologies QA Engineer Interview Questions and Answers

Encapsulation is the process of hiding internal details of an object and providing access only through defined methods.

• Encapsulation helps in achieving data abstraction and data hiding.

• It allows for better control over the data and prevents direct access to it.

• Loading process refers to the process of loading a program or data into memory for execution.

• Reverse string code example: function reverseString(str) { return st

Encapsulation is the process of hiding internal implementation details and providing a public interface. Loading process refers to the steps involved in loading a program or data into memory.

• Encapsulation helps in achieving data abstraction and information hiding.

• It allows for better control over data and prevents unauthorized access.

• Loading process involves steps like parsing, linking, and loading the program or data ...read more

Regression testing is retesting of previously tested functionality, while sanity testing is a quick check to ensure basic functionality is working.

• Regression testing is performed to ensure that changes or fixes in the software do not introduce new defects or impact existing functionality.

• It involves retesting of the entire application or a specific set of test cases.

• Regression testing is usually performed after major c...read more

Test cases for QR code should cover scanning, decoding, error handling, and compatibility with different devices.

• Verify that the QR code can be scanned successfully using different devices and apps.

• Test the decoding accuracy of the QR code to ensure the correct information is extracted.

• Check for error handling scenarios such as invalid QR codes or damaged codes.

• Test the compatibility of the QR code with various devices

Write a Java code to reverse a string

• Use StringBuilder to reverse the string

• Convert the string to StringBuilder, call reverse() method, and convert back to string

• Handle null or empty string cases

Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.

• Inheritance allows a class to reuse code from another class, promoting code reusability and reducing redundancy.

• Subclasses can inherit attributes and methods from a superclass, and can also override or extend them.

• Inheritance creates a hierarchical relationship between classes, with child classes i...read more

SQL join tables to combine data from multiple tables based on a related column

• Use JOIN keyword to combine tables based on a related column

• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• Specify the columns to join on using ON clause

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.id = table2.id