3M Interview Questions and Answers

Rotate array clockwise K times, implement binary search

• Rotate the array by reversing the array and then reversing the first K elements and then reversing the remaining elements

• Implement binary search by dividing the array into two halves and comparing the middle element with the target

• Repeat the binary search until the target is found or the array is exhausted

Linked list is a data structure where each element points to the next element. Stack is a data structure that follows Last In First Out (LIFO) principle.

• Linked list implementation involves creating nodes with data and a pointer to the next node.

• Stack implementation involves pushing elements onto the stack and popping them off in reverse order.

• Example: Linked list - 1 -> 2 -> 3 -> NULL, Stack - push(1), push(2), push(3), pop() returns 3.

A linked list is a data structure where each element points to the next element. Operations include insertion, deletion, and traversal.

• To insert a new element, create a new node and update the pointers of the previous and next nodes.

• To delete an element, update the pointers of the previous and next nodes to skip the node to be deleted.

• Traversal involves starting at the head node and following the pointers to each subsequent node.

Designing a Unified Platform for Water Visibility for a state.

• Conduct research on existing water management systems in the state

• Identify key stakeholders and their requirements

• Develop a user-friendly interface for data collection and analysis

• Ensure data accuracy and security

• Integrate real-time monitoring systems for water quality and quantity

• Provide actionable insights and recommendations for decision-making

• Collaborate with government agencies and private organizations for im...read more

Main concepts of OOP include encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation: Bundling data and methods that operate on the data into a single unit (object).

• Inheritance: Creating new classes based on existing classes, allowing for code reuse.

• Polymorphism: Objects of different classes can be treated as objects of a common superclass.

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

Oops concepts in Java refer to Object-Oriented Programming principles like Inheritance, Encapsulation, Polymorphism, and Abstraction.

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

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability of a method to do different things based on the object it is acting upon.

• Abstraction: Hiding the implementation details and showing only the necessary feature...read more

Yes, I have extensive experience using ETABS in various structural engineering projects.

• I have been using ETABS for over 5 years in designing and analyzing structural systems.

• I have successfully completed multiple projects using ETABS, including high-rise buildings and industrial structures.

• I am proficient in creating complex models, performing dynamic analysis, and interpreting results in ETABS.

• I have attended advanced training courses to enhance my skills in ETABS.

• I have co...read more