20+ Fabcare And Facade Interview Questions and Answers

Balls are removed and replaced based on color. Find the last ball remaining.

• Start with 20 red and 16 blue balls

• Remove 2 balls and replace based on color

• Repeat until only one ball remains

Find the second largest prime number and its index from an array of positive integers.

• Iterate through the array and check if each number is prime

• Store the largest and second largest prime numbers found so far

• Also store their indices

• Return the second largest prime number and its index

The average speed can be calculated by taking the harmonic mean of the two speeds.

• To calculate the harmonic mean, divide the sum of the speeds by the reciprocal of the sum of their reciprocals.

• In this case, the harmonic mean can be calculated as 2/(1/20 + 1/30) = 24 km/h.

The data structure to program a jigsaw puzzle program would be a graph.

• Use a graph data structure to represent the puzzle pieces and their connections.

• Each puzzle piece can be represented as a node in the graph.

• Edges between nodes represent the connections between puzzle pieces.

• To solve the puzzle, use graph traversal algorithms like depth-first search or breadth-first search.

• Apply puzzle-solving strategies like finding corner pieces first or matching edge colors.

The minimum number of steps to find the defective ball is 2.

• Divide the 8 balls into 3 groups of 3, 3, and 2 balls.

• Compare the weights of the two groups of 3 balls.

• If one group is heavier, divide it into 2 balls and compare their weights.

• If the two balls have different weights, the heavier ball is the defective one.

• If the two balls have the same weight, the remaining ball in the first group of 3 is the defective one.

Find the first missing positive number in an array of positive and negative integers.

• Sort the array in ascending order

• Iterate through the sorted array and find the first positive number that is missing

• If no positive number is missing, return the next positive number after the largest positive number in the array

Operator overloading is the ability to redefine operators for custom classes.

• Allows operators to be used with custom classes

• Example: '+' operator can be used to concatenate strings

• Can improve readability and simplify code

Method overloading is having multiple methods with the same name but different parameters. Method overriding is having a method in a subclass with the same name, return type, and parameters as a method in its superclass.

• Method overloading is achieved within the same class.

• Method overriding occurs in a subclass that inherits from a superclass.

• Method overloading is determined at compile-time based on the number, type, and order of parameters.

• Method overriding is determined at r...read more

Polymorphism is the ability of an object to take on many forms. It allows objects of different classes to be treated as the same type.

• Polymorphism is achieved through method overriding and method overloading.

• Method overriding allows a subclass to provide a specific implementation of a method that is already defined in its superclass.

• Method overloading allows multiple methods with the same name but different parameters to be defined in a class.

• Polymorphism enables code reusabi...read more