Interview Questions and Answers

Yes, C# supports multiple inheritance through interface implementation and class inheritance.

• C# does not support multiple inheritance through class inheritance alone.

• To achieve multiple inheritance, a class can inherit from one class and implement multiple interfaces.

• Example: class MyClass : MyBaseClass, IInterface1, IInterface2 { }

Array of pointers is an array containing memory addresses of variables, while pointer to an array is a pointer pointing to the first element of an array.

• Array of pointers can be used to store multiple strings, each string being a pointer to a character array.

• Pointer to an array can be used to access elements of an array using pointer arithmetic.

• Array of pointers can be dynamically allocated using malloc() function.

• Pointer to an array can be passed as an argument to a function...read more

Security for a web API can be provided through authentication, encryption, and rate limiting.

• Implement authentication mechanisms such as OAuth or API keys to ensure only authorized users can access the API.

• Use encryption to protect sensitive data being transmitted over the network.

• Implement rate limiting to prevent excessive requests and potential denial of service attacks.

• Regularly update and patch the API to address any security vulnerabilities.

• Monitor API usage and logs fo...read more

Accessing nested index using pointer in C/C++

• Use the arrow operator (->) to access the nested structure element

• Use the dereference operator (*) to access the nested array element

• Example: ptr->nestedStruct.nestedArray[*].element

• Example: (*ptr).nestedArray[*].element

Inheritance in car model refers to the ability of a new car model to inherit features and characteristics from an existing car model.

• Inheritance allows for the creation of a new car model that shares common features with an existing car model

• The new car model can add or modify features inherited from the existing car model

• For example, a new sports car model can inherit features from a base car model such as engine, transmission, and chassis, but add modifications such as a mo...read more

Types of wait include implicit, explicit, fluent, and thread.sleep

• Implicit wait: Waits for a certain amount of time before throwing a NoSuchElementException

• Explicit wait: Waits for a certain condition to occur before proceeding further

• Fluent wait: Waits for a condition to occur with a defined polling interval

• Thread.sleep: Pauses the execution for a specified amount of time

Number system conversion in C involves converting numbers between different bases, such as decimal to binary or hexadecimal.

• Use functions like itoa() to convert integers to strings in different bases

• Use strtol() to convert strings to integers in different bases

• Remember to specify the base when converting numbers

Data structures in C language are essential for organizing and manipulating data efficiently.

• Data structures like arrays, linked lists, stacks, queues, trees, and graphs are commonly used in C programming.

• Arrays are used to store a collection of elements of the same data type.

• Linked lists are used to store elements in a linear order.

• Stacks and queues are used for storing elements in a last-in-first-out (LIFO) and first-in-first-out (FIFO) manner, respectively.

• Trees and graphs...read more