MTX Group Interview Questions and Answers

Insert an element into an AVL tree while maintaining balance.

• Ensure the AVL tree remains balanced after insertion by performing rotations if necessary.

• Update the height of each node after insertion to maintain the AVL property.

• Perform single or double rotations based on the balance factor of the nodes.

• Example: Inserting 7 into the AVL tree shown in the image would require a double rotation to balance the tree.

Find the smallest positive integer missing from an array of integers.

• Iterate through the array and mark positive integers as visited by changing the sign of the corresponding index.

• After marking, iterate again to find the first positive index which is not marked.

• Return the index + 1 as the smallest missing positive integer.

To delete a node in a Binary Search Tree (BST), we need to consider three cases: node has no children, node has one child, and node has two children.

• For a node with no children, simply remove the node from the tree.

• For a node with one child, replace the node with its child.

• For a node with two children, find the inorder successor (smallest node in the right subtree), copy its value to the node to be deleted, and then delete the inorder successor node.

Test strategy is a high-level plan to achieve testing objectives and goals.

• Test strategy outlines the approach to be used for testing a particular system or product.

• It includes the scope of testing, resources, timelines, and risks involved.

• Test strategy helps in determining the testing methods, techniques, and tools to be used.

• It also defines the entry and exit criteria for testing phases.

• Example: A test strategy for a mobile application may include testing on various devices...read more

Yes, I have experience with object oriented programming.

• I have worked with Java and C++, which are both object oriented languages.

• I have created classes and objects, and used inheritance and polymorphism.

• I have also used design patterns like Singleton and Factory Method.

• I am familiar with the principles of encapsulation, abstraction, and inheritance.

A test plan is a document outlining the scope, approach, resources, and schedule of testing activities.

• Defines the objectives and scope of testing

• Outlines the test strategy and approach

• Includes details on resources, schedule, and responsibilities

• Describes the test environment and tools to be used

• Specifies the entry and exit criteria for testing

• Provides a roadmap for the testing process

Implementing the Bubble Sort algorithm

• Compare each pair of adjacent elements and swap them if they are in the wrong order

• Repeat this process until no more swaps are needed

• Time complexity of O(n^2) makes it inefficient for large datasets

BDD framework in test automation focuses on behavior-driven development principles to create automated tests.

• BDD framework uses natural language to define test scenarios

• Tests are written in a human-readable format using Given-When-Then syntax

• Tools like Cucumber and SpecFlow are commonly used for BDD test automation