T Interv.NEiew Flashcards

Question

Does a static method produce a state?

Answer 1

Extract that code into a static method

Answer 2

Interfaces

Answer 3

you should use inheritance (Abstract classes)

Answer 4

An abstract method

Answer 5

Data abstraction is the process of hiding certain details and showing only essential information to the user

Answer 6

The class name, a return type

Answer 7

Process is an independent execution unit with its own state and memory; Architectural construct. Threads exist inside of a Process and share state and memory; coding construct

Answer 8

Adding to the functionality of a method, while keeping the same name. It's a compile time event. ``` int add(int a, int b) return a+b; int add(int a, int b, int c) return a+b+c; ``` (note, both of these are usable, the second one doesn't overwrite the first one. So overloading is a way of adding to the capabilities of a method, while overriding is re-writing methods that already exist)

Answer 9

When we define a property as IEnumerable, we can only iterate through each item. But when we define a property as ICollection, we can add, edit, update and delete an item.

Answer 10

You override a virtual method in a sub class. Overriding concerns defining a different implementation of the same method in inherited classes. It is a runtime event

Answer 11

``` public class Base_Parent { public void show() Console.WriteLine("This is my parent class."); } ``` ``` public class Derived _Parent : Base_Parent { public new void show() Console.WriteLine("This is my child class."); } ```

Answer 12

abstract classes

Answer 13

encapsulated delegate

Answer 14

public event ClickHandler OnClick;

Answer 15

public delegate void EventHandler(object sender, EventArgs e);

Answer 16

https://www.tutorialsteacher.com/question-answer/csharp/delegates-events/2

Answer 17

variables inside a class

Answer 18

Depth-first search

Answer 19

Breadth-first search

Answer 20

The type or member can be accessed by any other code in the same assembly or another assembly that references it

Answer 21

In DFS doesn't need any additional data structure to store the nodes. The recursive implementation of DFS uses the call stack

Answer 22

Automatic by default, though you can do it manually using pointers

Answer 23

An allocation is made any time you declare an object with a “new” keyword. When there is not enough memory to allocate an object, the garbage collector must collect and dispose of garbage memory.

Answer 24

SQL is still faster. And you still sometimes need SQL for hand-tweaked queries - especially with optimization or locking hints. Most providers don't support the use of LINQ for predicated updates, and of course you still need SQL for triggers.

Answer 25

SQL queries

Answer 26

``` Shorter, more readable code No magic strings Intellisense Compile check when database changes Unit of work pattern (context) Lazy loading ```

Answer 27

An enum is a special "class" that represents a group of constants

Answer 28

compiled .exe or .dll files

Answer 29

The type or member can be accessed only by code in the same class or struct.

Answer 30

The meaning of Encapsulation, is to make sure that "sensitive" data is hidden from users. To achieve this, you must: Declare fields/variables as private Provide public get and set methods, through properties, to access and update the value of a private field

Answer 31

If we know the solution is not that far from the source vertex, use BFS. If our tree is broad, use DFS as BFS will take too much memory. Similarly, if our tree is very deep, choose BFS over DFS.

Answer 32

The type or member can be accessed only by code in the same class, or in a class that is derived from that class.

Answer 33

A deadlock occurs when each thread (minimum of two) tries to acquire a lock on a resource already locked by another. Thread 1 locked on Resources 1 tries to acquire a lock on Resource 2. At the same time, Thread 2 has a lock on Resource 2 and it tries to acquire a lock on Resource 1. Two threads never give up their locks, hence the deadlock occurs. The simplest way to avoid deadlock is to use a timeout value. The Monitor class (system.Threading.Monitor) can set a timeout during acquiring a lock.

Answer 34

The [ThreadStatic] creates isolated versions of the same variable in each thread. Fields marked with [ThreadStatic] are created on Thread Local Storage so every thread has it own copy of the field i.e the scope of the fields are local to the thread.

Answer 35

https://docs.microsoft.com/en-us/previous-versions/aspnet/ms178472(v=vs.100)

Answer 36

The type or member can be accessed by any code in the same assembly, but not from another assembly.

Answer 37

Usually a simpler type of data, where the data and the pointer is kept on the stack int float bool char

Answer 38

Usually more complex types of data, where the data is kept on the heap. ``` class delegate string ```

Answer 39

A delegate in .NET is a way of passing behavior as a parameter. Similar to a function pointer in C or C++. Using a delegate allows the programmer to encapsulate a reference to a method inside a delegate object Often used in async methods

Answer 40

A group of classes, structures, interfaces, enumerations, and delegates—organized in a logical hierarchy

T Interv.NEiew Flashcards

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