3i Business Solutions Interview Questions and Answers

To find the mid of a linked list using a single loop.

• Initialize two pointers, slow and fast, both pointing to the head of the linked list.

• Move the slow pointer by one node and the fast pointer by two nodes in each iteration.

• When the fast pointer reaches the end of the linked list, the slow pointer will be pointing to the middle node.

• Return the value of the node pointed by the slow pointer as the mid of the linked list.

Reverse an array without using extra space

• Use two pointers, one at the beginning and one at the end of the array

• Swap the elements at the two pointers and move the pointers towards each other

• Repeat until the pointers meet at the middle of the array

Invoke controller is a component in a software application that manages the flow of requests and responses between the user interface and the backend services.

• Manages the communication between user interface and backend services

• Handles the routing of requests to appropriate functions or methods

• Coordinates the flow of data and actions within the application

Facade in Laravel is a design pattern that provides a simple interface to a complex subsystem.

• Facade provides a static interface to classes that are available in the application's service container.

• It is used to simplify the usage of complex classes by providing a simpler interface.

• Facade allows you to access Laravel's features without needing to instantiate objects or use dependency injection.

• Example: The Auth facade in Laravel provides a simple way to interact with the auth...read more

Attribution models in Google Ads determine how credit for conversions is assigned to different touchpoints in a customer's journey.

• Common attribution models include last click, first click, linear, time decay, and position-based.

• Each model has its own way of assigning credit to touchpoints based on their position in the customer journey.

• For example, the last click model gives all credit for a conversion to the last touchpoint clicked before the conversion.

• Advertisers can choo...read more

Possible reasons for drop in CPM include seasonality, changes in ad inventory, shifts in audience demographics, and increased competition.

• Seasonal fluctuations in advertising demand

• Changes in available ad inventory

• Shifts in audience demographics affecting targeting effectiveness

• Increased competition leading to lower bids

Types of floors in GAM include carpet, hardwood, tile, and laminate.

• Carpet

• Hardwood

• Tile

• Laminate