10+ Senior Software Engineer Testing Interview Questions and Answers for Freshers

Status codes 404 and 200 indicate the success or failure of a web request.

• 200 OK: The request was successful, and the server returned the requested resource.

• Example: A user accesses a webpage, and the server responds with the page content.

• 404 Not Found: The server cannot find the requested resource, indicating it may not exist.

• Example: A user tries to access a non-existent page, resulting in a 404 error.

Test case for a microservice scheduling messages

• Verify that messages are scheduled correctly based on specified time

• Check if messages are sent to the correct recipients

• Ensure that messages are not duplicated or lost during scheduling

Classes are blueprints for creating objects, encapsulating data and behavior in object-oriented programming.

• A class defines properties (attributes) and methods (functions) that its objects will have. Example: class Car { int speed; void drive(); }

• An object is an instance of a class. Example: Car myCar = new Car();

• Classes promote code reusability and organization. Example: class Animal { void eat(); } can be inherited by Dog and Cat classes.

• Encapsulation allows classes to hide...read more

Try-catch is a programming construct used to handle exceptions and errors gracefully during code execution.

• Try block: Contains code that may throw an exception.

• Catch block: Contains code that handles the exception if it occurs.

• Example: try { // risky code } catch (Exception e) { // handle exception }

• Multiple catch blocks can be used to handle different types of exceptions.

• Finally block: Optional block that executes after try-catch, regardless of whether an exception occurred.

Agile methodology is used for software development to promote flexibility and collaboration.

• Advantages of Agile: promotes flexibility, encourages collaboration, allows for quick adaptation to changes

• Disadvantages of Agile: can be challenging to implement in large teams, requires constant communication and coordination

Test cases are detailed steps to test a specific functionality, while test scenarios are high-level descriptions of a feature to be tested.

• Test cases are specific steps to be executed to validate a particular functionality or requirement.

• Test scenarios are broader and describe a high-level overview of what needs to be tested.

• Test cases are detailed and include input data, expected results, and execution steps.

• Test scenarios are more general and may not include specific detail...read more

JDK is the development kit, JRE is the runtime environment, and JVM is the virtual machine for executing Java applications.

• JDK (Java Development Kit): A complete toolkit for developing Java applications, including the compiler (javac) and libraries.

• JRE (Java Runtime Environment): Provides the libraries and components necessary to run Java applications, but does not include development tools.

• JVM (Java Virtual Machine): An abstract machine that enables Java bytecode to be execu...read more

Classes in programming define access levels and behaviors: public, private, protected, and static.

• Public: Accessible from anywhere. Example: 'public class MyClass {}'

• Private: Accessible only within the class. Example: 'private int myVar;'

• Protected: Accessible within the class and subclasses. Example: 'protected void myMethod() {}'

• Static: Belongs to the class rather than instances. Example: 'static int myStaticVar;'

A hash set is a data structure that stores unique elements using a hash table for efficient access and retrieval.

• Stores unique elements, preventing duplicates.

• Uses a hash function to compute an index for each element.

• Provides average O(1) time complexity for add, remove, and contains operations.

• Example: Inserting elements {1, 2, 3} results in a hash set with unique values.

• Commonly used in scenarios requiring fast membership tests.

Stacks and queues are abstract data structures that manage collections of elements in specific orders.

• Stack: Last In, First Out (LIFO) structure. Example: Undo feature in text editors.

• Queue: First In, First Out (FIFO) structure. Example: Print job management in printers.

• Stacks use push and pop operations to add and remove elements.

• Queues use enqueue and dequeue operations for adding and removing elements.

• Both can be implemented using arrays or linked lists.

This question assesses your understanding of Java fundamentals and problem-solving skills.

• Understand Java basics: classes, objects, inheritance, and polymorphism.

• Practice coding problems on platforms like LeetCode or HackerRank.

• Familiarize yourself with Java testing frameworks like JUnit and TestNG.

• Review common design patterns and their implementations in Java.

Different types of testing include unit testing, integration testing, system testing, and acceptance testing.

• Unit testing focuses on testing individual components or modules of the software.

• Integration testing involves testing how different modules work together.

• System testing tests the entire system as a whole.

• Acceptance testing is done to ensure the software meets the requirements of the end users.

A product is a tangible or intangible item that is created and offered for sale.

• Products can be physical goods, such as electronics or clothing.

• Products can also be services, such as software or consulting.

• Products are designed to meet a specific need or want of a customer.

• Products go through a lifecycle of development, launch, growth, maturity, and decline.

SQL is a structured query language for relational databases, while MongoDB is a NoSQL database for unstructured data.

• Data Structure: SQL uses tables with rows and columns, while MongoDB uses collections and documents (JSON-like format). Example: SQL table vs. MongoDB document.

• Schema: SQL databases have a fixed schema, requiring predefined structure, whereas MongoDB is schema-less, allowing for flexible data models.

• Query Language: SQL uses structured queries (SELECT, INSERT, U...read more