Synopsys Software Engineer Interview Questions and Answers

References and pointers are both used to refer to memory locations, but references cannot be null and cannot be reseated.

• Pointers can be null or uninitialized

• Pointers can be reseated to point to a different memory location

• References are automatically dereferenced

• References cannot be used with arrays

• Pointers can be used with arrays

References are necessary when passing large objects to functions or when returning objects from functions.

• When passing large objects to functions

• When returning objects from functions

• When working with complex data structures

• When implementing operator overloading

• When working with polymorphism

Const pointers should be declared in the same scope as the variable they point to.

• Declaring const pointers in the same scope as the variable they point to ensures that the pointer cannot be used to modify the variable.

• If the pointer is only used within a function, it should be declared within that function.

• If the pointer is used across multiple functions, it should be declared in a header file or at the top of the sour...read more

Copy constructor with pointers creates a new object by copying the values of the existing object's pointers.

• Copy constructor is used to create a new object from an existing object.

• Pointers in the new object point to the same memory locations as the original object.

• Deep copy should be used to avoid shallow copy issues.

new and malloc are used for dynamic memory allocation in C++ and C respectively.

• new is an operator in C++ while malloc is a function in C.

• new automatically calls the constructor while malloc does not.

• new returns a pointer to the object while malloc returns a void pointer.

• new throws an exception if allocation fails while malloc returns NULL.

• new can be overloaded while malloc cannot be.

• new and delete are used together wh...read more

This program detects if a number is an integer or a float based on its input format.

• Use input() to get user input as a string.

• Check if the string contains a decimal point to identify floats.

• Use str.isdigit() to check if the string represents an integer.

• Example: '123' is int, '123.45' is float.

Need more context. What needs to be done with the large rectangle?

• What are the dimensions of the rectangle?

• Is it a 2D or 3D object?

• What is the context of the problem?

• Are there any constraints or limitations?

• What tools or programming languages can be used?

Derive a formula to determine how many smaller rectangles fit into a bigger rectangle given their dimensions.

• Calculate the number of times the smaller rectangle can fit into the bigger rectangle horizontally and vertically

• Divide the width of the bigger rectangle by the width of the smaller rectangle to get the horizontal count

• Divide the height of the bigger rectangle by the height of the smaller rectangle to get the ve...read more

At least 4 points are required to draw a rectangle.

• A rectangle has 4 sides and 4 corners, so at least 4 points are needed to define those corners.

• The points must be arranged in a specific order to form a closed shape with 4 sides.

• Additional points can be used to add details or modify the shape of the rectangle.

• The number of points required may vary depending on the software or tool used to draw the rectangle.

Answering how to calculate new coordinates of a scaled rectangle and providing a program for it.

• To calculate new coordinates, multiply the original coordinates by the scaling factor

• Scaling factor can be calculated by dividing the new length/breadth by the original length/breadth

• Program can take input of original coordinates, scaling factor, and output new coordinates

• Example: Original coordinates: (0,0), (0,5), (5,5), (...read more