Altair Engineering Internship Trainee Interview Questions and Answers

malloc is a function in C that dynamically allocates memory on the heap. It is used to allocate memory for variables or data structures.

• malloc is used in C programming language.

• It is used to allocate memory on the heap.

• malloc is different from 'new' in C++ as it does not call constructors for objects.

C++ is a general-purpose programming language while Objective C is a superset of C used for iOS and macOS development.

• C++ is widely used for developing applications, games, and system software.

• Objective C is mainly used for iOS and macOS development.

• C++ supports both procedural and object-oriented programming paradigms.

• Objective C is an object-oriented language with dynamic runtime features.

• C++ has a larger community a...read more

Class container is a class that holds objects of other classes, while class composition is a way to combine multiple classes to create a new class.

• Class container holds objects of other classes, acting as a collection or container.

• Class composition combines multiple classes to create a new class with its own behavior and attributes.

• In class container, the objects are typically stored in a data structure like an array o...read more

Divide the horses into groups of 5 and race them. Take the top 2 from each race and race them again. Finally, race the top 2 horses to determine the top 3.

• Divide the horses into 3 groups of 5 and race them.

• Take the top 2 horses from each race and race them again.

• Finally, race the top 2 horses to determine the top 3.

Developing a real-time data processing system for a high-traffic e-commerce website

• Implemented a distributed system architecture to handle large volumes of data

• Optimized algorithms for efficient data processing and storage

• Utilized caching mechanisms to improve system performance

• Worked closely with cross-functional teams to troubleshoot and resolve issues

• Example: Successfully reduced data processing time by 50% by imple

Seeking new challenges and opportunities for growth.

• Looking for a more challenging role to further develop my skills

• Interested in exploring new technologies and industries

• Seeking better career advancement opportunities

• Want to work in a more collaborative team environment

The width of a tree is the maximum number of nodes at any level in the tree.

• To calculate the width of a tree, we can perform a level order traversal and keep track of the maximum number of nodes at any level.

• We can use a queue data structure to perform the level order traversal.

• At each level, we count the number of nodes in the queue and update the maximum width if necessary.

C++ program to reverse a string

• Use a loop to iterate through the string

• Swap the characters at the beginning and end of the string

• Continue swapping until the middle of the string is reached

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