10+ Amazon Interview Questions and Answers

Custom string class implementation with C string and explanation of using reference in copy constructor.

• C string can be implemented using char arrays and functions like strcpy, strlen, etc.

• Custom string class can be implemented using dynamic memory allocation and member functions for string manipulation.

• References in copy constructor are used to avoid unnecessary copying of objects, improving performance and memory efficiency.

The age of the individuals cannot be determined based on the given information.

• The product of two vote eligible people does not provide any information about their individual ages.

• Age is not a factor in determining the product of two numbers.

• Additional information about the individuals' ages or their relationship to the product is needed.

Implement matrix multiplication and bitwise XOR operation in C++.

• For matrix multiplication, define a Matrix class with overloaded * operator.

• For bitwise XOR operation, use the ^ operator between two integers.

• Ensure the dimensions of matrices are compatible for multiplication.

• Handle edge cases like empty matrices or different dimensions.

• Example: Matrix A(4, 4); Matrix B(4, 4); Matrix C = A * B;

• Example: int result = num1 ^ num2;

The shortest distance between 2 points on a 3D cubical surface can be calculated using the Manhattan distance formula.

• Calculate the absolute difference between the x, y, and z coordinates of the two points.

• Sum up the absolute differences to get the Manhattan distance.

• Manhattan distance = |x2 - x1| + |y2 - y1| + |z2 - z1|

• Example: If point A is (1, 2, 3) and point B is (4, 5, 6), the Manhattan distance would be |4-1| + |5-2| + |6-3| = 9.

The length of string wrapped around a cylindrical surface can be calculated using the formula 2πr, where r is the radius of the cylinder.

• The formula to calculate the length of string wrapped around a cylindrical surface is 2πr.

• For example, if the radius of the cylinder is 5 cm, the length of the string wrapped around it would be 2π(5) = 10π cm.

32-bit OS can only address up to 4GB of RAM, while 64-bit OS can address much more.

• 32-bit OS can only address up to 4GB of RAM, while 64-bit OS can address much more

• 64-bit OS allows for larger file sizes and better performance

• 64-bit OS is more secure due to enhanced security features

• 64-bit OS is required to run certain modern software and games

Linked list is a data structure where each element points to the next element in the sequence.

• Nodes contain data and a reference to the next node

• Insertion and deletion can be done efficiently

• Traversal starts from the head node

Projection of one vector onto another is a way to find the component of one vector in the direction of another vector.

• To project vector A onto vector B, you can use the formula: projB(A) = (A dot B / ||B||^2) * B

• The dot product of two vectors is calculated by multiplying their corresponding components and adding the results.

• The magnitude of a vector can be found using the formula: ||V|| = sqrt(Vx^2 + Vy^2)

• Example: If vector A = [3, 4] and vector B = [1, 2], the projection of ...read more

Dassault Systemes is a global leader in 3D design software, 3D Digital Mock Up and Product Lifecycle Management solutions.

• Dassault Systemes offers cutting-edge technology and innovative solutions for software development.

• They have a strong reputation in the industry for providing high-quality products and services.

• Working at Dassault Systemes provides opportunities for professional growth and development.

• Their focus on research and development ensures that employees are worki...read more

Sort array without using method

• Iterate through the array and compare each element with the next one

• Swap elements if they are in the wrong order

• Repeat the process until the array is fully sorted

Reverse a given string

• Use a loop to iterate through the characters of the string

• Append each character to a new string in reverse order

• Return the reversed string

Three jars puzzle involves transferring water between jars to measure a specific amount.

• Fill the 5L jar, pour it into the 3L jar, leaving 2L in the 5L jar.

• Empty the 3L jar, pour the remaining 2L from the 5L jar into the 3L jar.

• Fill the 5L jar again, pour water into the 3L jar until it is full (1L remaining in the 5L jar).