Computer Programmer Interview Questions and Answers

Sub-typing is a concept in programming where a derived class inherits properties and behaviors from a base class.

• Sub-typing allows for code reuse and promotes modularity.

• In multiple inheritance, the order of solving is determined by the order of inheritance in the class definition.

• For example, if a class inherits from two base classes A and B, and both have a method with the same name, the method from class A will be called first if it appears before class B in the inheritanc...read more

Django memory is managed through garbage collection and reference counting.

• Django uses a combination of garbage collection and reference counting to manage memory.

• Garbage collection automatically frees up memory by identifying and removing objects that are no longer in use.

• Reference counting keeps track of the number of references to an object and deallocates it when the count reaches zero.

• Django's memory management helps optimize performance and prevent memory leaks.

• Example:...read more

Python uses automatic memory management through a process called garbage collection.

• Python uses reference counting to keep track of objects in memory.

• When an object's reference count reaches zero, it is automatically deallocated.

• Python also employs a garbage collector to handle cyclic references.

• Memory management in Python is transparent to the programmer.

VirtualBox is a virtualization software that allows running multiple operating systems on a single physical machine.

• VirtualBox is an open-source virtualization software developed by Oracle.

• It allows users to create and run virtual machines on their computer.

• VirtualBox supports various operating systems including Windows, Linux, and macOS.

• It provides features like snapshotting, which allows saving the state of a virtual machine and reverting back to it later.

• VirtualBox also su...read more

A dictionary program that stores and retrieves words and their definitions.

• Use an array of strings to store the words and their definitions.

• Implement functions to add new words, retrieve definitions, and update existing definitions.

• Consider using a hash table or a trie data structure for efficient word lookup.

• Handle cases where multiple definitions or synonyms exist for a word.