10+ HDFC Bank Interview Questions and Answers

Pass by reference and pass by pointer are both ways to pass data to a function, but they differ in how they access and modify the data.

• Pass by reference uses a reference to the original variable, allowing direct access and modification.

• Pass by pointer uses a pointer to the memory address of the variable, requiring dereferencing to access and modify the data.

• Pass by reference is generally considered safer and more convenient, while pass by pointer offers more flexibility and c...read more

Thread synchronization is the coordination of multiple threads to ensure they access shared resources in a controlled manner.

• Thread synchronization prevents race conditions and data inconsistencies.

• Semaphores are synchronization primitives used to control access to resources.

• Critical sections are code segments that must be executed atomically.

• A common threading problem is the producer-consumer problem.

• Synchronization mechanisms like locks, semaphores, or condition variables c...read more

A pure virtual function is a function declared in a base class that has no implementation and must be overridden in derived classes.

• Pure virtual functions are used to create abstract classes, which cannot be instantiated.

• They provide a common interface for derived classes to implement their own functionality.

• An example of a pure virtual function is a 'draw' function in a base 'Shape' class, which must be implemented by derived classes like 'Circle' or 'Rectangle'.

OOP is needed for modular and reusable code. Encapsulation hides implementation details. Abstraction simplifies complex systems. Polymorphism allows objects to take on multiple forms.

• OOP promotes code reusability and modularity

• Encapsulation hides implementation details and protects data

• Abstraction simplifies complex systems by focusing on essential features

• Polymorphism allows objects to be used in multiple ways

• Types of polymorphism include compile-time and runtime polymorphis...read more

manage and unmanage are not standard terms in C++

• There are no standard terms or concepts called 'manage' and 'unmanage' in C++

• These terms might be specific to a particular framework or library

• Without more context, it is difficult to provide a specific answer

vtable is a virtual function table used in object-oriented programming to implement dynamic dispatch.

• vtable is a data structure that contains pointers to the virtual functions of a class.

• vpointer is a pointer that points to the vtable of an object.

• It allows objects of different derived classes to be treated as objects of the base class.

• When a virtual function is called, the vpointer is used to find the correct function in the vtable.

A DLL (Dynamic Link Library) is a file containing code and data that can be used by multiple programs simultaneously.

• To create a DLL, you need to write the code in a programming language like C++ or C#.

• Compile the code into an object file and then link it with a DLL linker to create the DLL file.

• DLLs can contain functions, classes, variables, and resources that can be accessed by other programs.

• DLLs provide code reusability, modularity, and allow for easier maintenance and up...read more

C is a procedural programming language, while C++ is an extension of C with object-oriented programming features.

• C is a procedural language, while C++ supports both procedural and object-oriented programming paradigms.

• C++ has additional features like classes, objects, inheritance, and polymorphism.

• C++ supports exception handling and templates, which are not available in C.

• C++ has a standard template library (STL) that provides ready-to-use data structures and algorithms.

• C++ a...read more

A basic code in Python

• Print 'Hello, World!' using print() function

• Create a variable and assign a value to it

• Use if-else statement to check a condition

• Create a function and call it

Filters in .Net are used to manipulate data before it is displayed or processed further.

• Filters can be used for data validation, formatting, or transformation.

• Filters are commonly used in ASP.NET MVC for tasks like authentication, authorization, logging, etc.

• Filters can be applied globally to all controllers or specific to individual actions.

• Examples of filters in .Net include AuthorizationFilter, ActionFilter, ResultFilter, ExceptionFilter, etc.

I am interested in Data science and ML because of their ability to uncover insights from data and make predictions.

• I am fascinated by the power of data to drive decision-making and solve complex problems.

• I enjoy working with large datasets and finding patterns within them.

• I believe that the combination of statistics, programming, and domain knowledge in data science is a perfect fit for my skills.

• I have experience in programming languages like Python and R, as well as in stat...read more

CROS Policy is a policy that allows employees to work from a different location than their usual workplace.

• CROS stands for Company Remote Office Setup.

• The purpose of CROS Policy is to provide flexibility to employees in terms of work location.

• It helps in improving work-life balance and increasing employee satisfaction.

• Examples of CROS Policy include allowing employees to work from home or from a co-working space.