20+ iQlance Solutions Interview Questions and Answers

Function to swap two variables and possible exceptions

• Function should take two variables as input

• Use a temporary variable to swap the values

• Possible exceptions include null pointer exception or out of bounds exception

I would use a binary format like JPEG or PNG to save images.

• JPEG and PNG are common binary formats used to save images.

• These formats use compression to reduce file size without losing quality.

• Other options include BMP, GIF, and TIFF, but they may not be as efficient.

• Images can also be saved as arrays of pixels or as vectors, depending on the type of image.

• The choice of data structure depends on the specific use case and requirements.

Arrays store elements in contiguous memory locations, while LinkedLists store elements in nodes with pointers to the next element.

• Arrays have constant time access to elements using index, while LinkedLists have O(n) access time as they need to traverse from the beginning.

• Arrays have fixed size, while LinkedLists can dynamically grow and shrink in size.

• Arrays are better for random access and search operations, while LinkedLists are better for insertions and deletions in the mi...read more

Use a hashmap to store frequency of each number in the array for efficient retrieval of maximum occurring number.

• Use a hashmap to store the frequency of each number in the array.

• Iterate through the array and update the frequency count in the hashmap.

• Find the number with the highest frequency in the hashmap to get the maximum occurring number.

Pre/post increment/decrement operators are used to increase/decrease the value of a variable by 1.

• Pre-increment operator (++x) increases the value of x by 1 before using it in an expression.

• Post-increment operator (x++) increases the value of x by 1 after using it in an expression.

• Pre-decrement operator (--x) decreases the value of x by 1 before using it in an expression.

• Post-decrement operator (x--) decreases the value of x by 1 after using it in an expression.

• These operator...read more

No, Function Overloading is not the only example of Compile Time Polymorphism.

• Function Templates are another example of Compile Time Polymorphism where a single function can operate on different data types.

• Operator Overloading is also an example of Compile Time Polymorphism where operators can be overloaded to work with different data types.

• Static Polymorphism achieved through method overloading is another example of Compile Time Polymorphism.

Answering questions related to LinkedList operations and Circular LinkedList.

• LinkedList Class: Implement a class with nodes containing data and a reference to the next node.

• Insertion: Add a new node at the beginning, end, or at a specific position in the LinkedList.

• Deletion: Remove a node by updating references to skip over it.

• Reversing: Traverse the LinkedList and reverse the links between nodes.

• Sorting: Implement a sorting algorithm like bubble sort or merge sort on the Lin...read more

Multi-Threading in Java allows multiple threads to execute concurrently. Generics in Java enable type-safe collections and classes.

• Multi-Threading in Java allows for concurrent execution of multiple threads.

• Generics in Java enable type-safe collections and classes by allowing the use of parameterized types.

• Example of Multi-Threading: creating a new thread using the Thread class and implementing the run() method.

• Example of Generics: defining a generic class like ArrayList to s...read more

Designing a carrom board game system

• Define game rules and mechanics

• Create game board and pieces

• Implement player turns and scoring system

• Include AI for single player mode

• Consider multiplayer options and networking

• Test and debug thoroughly

Program to find middle of a linked list

• Traverse the linked list using two pointers, one moving twice as fast as the other

• When the faster pointer reaches the end, the slower pointer will be at the middle

• Handle even and odd length linked lists separately

Use recursion to reverse the string without using loops or other data structures.

• Create a recursive function that takes the string as input.

• In the function, check if the string is empty or has only one character, return the string in that case.

• Otherwise, call the function recursively with the substring excluding the first character and concatenate the first character at the end.

Pillars of OOP are Inheritance, Encapsulation, Abstraction, and Polymorphism. Real life example: Vehicles.

• Inheritance: Car and Bike classes inheriting from Vehicle class.

• Encapsulation: Data hiding in a class to protect it from outside interference.

• Abstraction: Using a remote control to operate a TV without knowing its internal workings.

• Polymorphism: Overloading a method with different parameters in a class.

Bentley Systems is a global leader in infrastructure engineering software, providing innovative solutions for sustainable development.

• Bentley Systems offers cutting-edge technology and tools for infrastructure engineering projects.

• The company has a strong reputation for innovation and sustainability in the industry.

• Bentley Systems has a global presence, providing opportunities to work on diverse projects around the world.

• The company values continuous learning and professional...read more

Oops concepts are fundamental principles of object-oriented programming.

• Encapsulation: bundling data and methods that operate on the data into a single unit (class)

• Inheritance: allows a class to inherit properties and behavior from another class

• Polymorphism: ability to present the same interface for different data types

• Abstraction: hiding the complex implementation details and showing only the necessary features

To tackle bug/defect leakage, I would implement a comprehensive defect management process and focus on preventive measures.

• Implement a robust defect management process

• Conduct thorough testing and review processes

• Use automated testing tools and techniques

• Establish clear communication channels with the development team

• Analyze root causes of bug leakage and take corrective actions

• Implement preventive measures such as code reviews, static analysis, and continuous integration

• Regul...read more

DSA stands for Data Structures and Algorithms, which are fundamental concepts in computer science.

• DSA is used to solve complex problems efficiently.

• Data Structures are ways of organizing and storing data, such as arrays, linked lists, and trees.

• Algorithms are step-by-step procedures for solving problems, such as sorting and searching.

• Understanding DSA is essential for software development and programming interviews.

• Examples of DSA in action include sorting algorithms like qui...read more

If last minute testing finds blocker/major bugs, prioritize and communicate the issues to the relevant stakeholders.

• Prioritize the bugs based on their severity and impact on the system

• Communicate the issues to the development team and project manager

• Provide detailed information about the bugs, including steps to reproduce and potential impact

• Work with the team to determine the best course of action, such as fixing the bugs immediately or releasing a hotfix

• Ensure that the bugs...read more

Testing can be stopped when certain conditions are met.

• Stop testing when all test cases have been executed and passed successfully.

• Stop testing when the project deadline is approaching and the remaining testing effort is not feasible.

• Stop testing when the cost of finding and fixing defects outweighs the benefits of further testing.

• Stop testing when the software meets the specified requirements and is deemed fit for release.

• Stop testing when the risk of continuing testing is a...read more

Sprint ceremony is a set of meetings held during a sprint in Agile software development.

• Sprint planning: Discussing and prioritizing the user stories for the upcoming sprint.

• Daily stand-up: A short daily meeting where team members share progress, discuss challenges, and plan for the day.

• Sprint review: Demonstrating the completed work to stakeholders and gathering feedback.

• Sprint retrospective: Reflecting on the sprint, identifying areas of improvement, and planning for the ne...read more

The code from Round 1 involved implementing a sorting algorithm in Python.

• Implemented a sorting algorithm in Python

• Used concepts like loops, conditionals, and list manipulation

• Example: Implemented bubble sort or selection sort