C# Answers

Create an Observable Collection. Listen to its Collection Changed Event and display message on UI for each operation.

1.       Addition: “Element ‘x’ is added in collection”

2.       Removal: “Element ‘x’ is removed from collection”

Use enum NotifyCollectionChangedAction to differentiate the action

 Exercise 1: Extension methods on int

1.       IsOdd

2.       IsEven

3.       IsPrime

4.       IsDivisibleBy (taking one parameter excluding the first this parameter)

Create a Product-Inventory software (No need of user Input or any other validations)

Product: (Override Equals or implement IEquatable<T>)

1.       Id

2.       Price

3.       IsDefective

Inventory:

1.        Dictionary containing all the products and their respective quantities in the inventory

2.       Total value of the inventory

Methods

1.       Add Product

2.       Remove Product

3.       Update Product Quantity

On change of Product’s Price, Inventory total value should get updated

If a Product becomes defective, remove it from the inventory.

(Handle them through EventHandler)

Create a list of integers and call where method on it and pass delegate to it in the following ways:

Find odd - Lambda Expression – without curly brackets

 Find Even - Lambda Expression – with curly brackets

 Find Prime – Anonymous Method

Find Prime Another – Lambda Expression

 Find Elements Greater Than Five – Method Group Conversion Syntax

Find Less than Five – Delegate Object in Where – Method Group Conversion Syntax in Constructor of Object

Find 3k – Delegate Object in Where –Lambda Expression in Constructor of Object

 Find 3k + 1 - Delegate Object in Where –Anonymous Method in Constructor of Object

  Find 3k + 2 - Delegate Object in Where –Lambda Expression Assignment

Find anything - Delegate Object in Where – Anonymous Method Assignment

Find anything - Delegate Object in Where – Method Group Conversion Assignment

Maintain a list of ducks to do following operations

1.       Add a duck

2.       Remove a duck

3.       Remove all ducks

4.       Capability to iterate the duck collection in increasing order of their weights. This should be the collections default iteration behaviour

5.       Capability to iterate the duck collection in increasing order of number of wings.

Maintain a list

Create an equipment – mobile and immobile

Delete

Move – mobile and immobile (this is going to update certain properties in equipment)

List all equipment. (just the basic details – name and description)

Show details (all details – including distance moved till date and maintenance cost)

List all mobile equipment -> Use Lambda

List all Immobile equipment -> Use Lambda

 List all equipment that have not been moved till now

Delete all equipment

Delete all immobile equipment

11Delete all mobile equipment

 Create a console application for the above scenario meeting all requirements. Use in-memory objects for storing data. Also make sure to validate user input and show appropriate messages for invalid inputs.

Try using Lambda, Linq, Select, Where query etc. for this assignment

Create a class to store details of student like roll no, name, and course joined and fee paid so far. Assume courses are C# and ASP.NET with course fees being 2000 and 3000.

Write a program using standard string functions that accepts a price of an item and display its coded value. The base of the key is: X C O M P U T E R S 1 2 3 4 5 6 7 8 9 Sample input/output dialogue: Enter price: 489.50 Coded value: PRS.UX

The system is a duck simulation game. There are ducks, each having weight and number of wings. All ducks can fly and quack, but different type of ducks fly and quack differently. For instance, let us consider the following–

1.       Rubber ducks don’t fly and squeak.

2.       Mallard ducks fly fast and quack loud.

3.       Redhead ducks fly slow and quack mild.

All ducks have following common property:

Type of Duck – Use enum to represent this value

Design classes and interfaces for the above story to meet the following requirements -

a.       Create a duck

b.       Show details of a duck, i.e. when you call for e.g. ShowDetails() method of a duck, duck should print its traits.

User following concepts: class, interfaces, polymorphism etc.

Write a program that will accept the currency value and the name of the country and will display the equivalent in U.S. dollar, based on the given list:

COUNTRY CURRENCY U.S. DOLLAR EQUIVALENT

British Pound 0.6 U.S. dollar

Canadian Dollar 1.3 U.S. dollar

Japanese Yen 140 U.S. dollar

German Mark 1.7 U.S. dollar

Philippines Peso 53 U.S. dollar

Write a program using string functions that will accept the name of the country as input value and will display the corresponding capital. Here is the list of the countries and their capitals.

COUNTRY CAPITAL

Canada Ottawa

United States Washington D.C.

U.S.S.R. Moscow

Italy Rome

Philippines Manila