Programming & Computer Science Answers

Extension methods on IEnumerable<T>. All of them taking a delegate

1.       CustomAll - Should work as All operation of Linq, with custom logic passed as delegate

2.       CustomAny - Should work as Any operation of Linq, with custom logic passed as delegate

3.       CustomMax - Should work as Max operation of Linq, with custom logic passed as delegate

4.       CustomMin - Should work as Min operation of Linq, with custom logic passed as delegate

5.       CustomWhere - Should work as Where operation of Linq, with custom logic passed as delegate

6.       CustomSelect - Should work as Select operation of Linq, with custom logic passed as delegate

Extension methods on IEnumerable<T>. All of them taking a delegate

1.       CustomAll - Should work as All operation of Linq, with custom logic passed as delegate

2.       CustomAny - Should work as Any operation of Linq, with custom logic passed as delegate

3.       CustomMax - Should work as Max operation of Linq, with custom logic passed as delegate

4.       CustomMin - Should work as Min operation of Linq, with custom logic passed as delegate

5.       CustomWhere - Should work as Where operation of Linq, with custom logic passed as delegate

6.       CustomSelect - Should work as Select operation of Linq, with custom logic passed as delegate

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)

Consider the following signal

x(n) = ASin(2πf1n) + BSin(2πf2n) + CSin(2πf3n); 

where A = 9, B = 8, C = 9

Also f1 = 250 Hz, f2 = 750 Hz and f3 = 989

Sampling Frequency fs = 4000 Hz

Perform the following operation on signal x(n) in MATLAB by developing a code:

a) Plot the signal x(n) in time domain.

b) Perform the DFT of the signal and plot magnitude values of signal in frequency 

domain. 

c) Apply a Low-pass FIR filter (Use convolution to apply filter) with 500 Hz cut-off 

frequency to filter the signal x(n).

d) Plot the signal x(n) in time and frequency domain after filtration

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

Non-Adjacent Combinations of Two Words

Given a sentence as input, find all the unique combinations of two words and print the word combinations that are not adjacent in the original sentence in lexicographical order.

Input

The input will be a single line containing a sentence.

Output

The output should be multiple lines, each line containing a valid unique combination of two words. The words in each line should be lexicographical order and the lines as well should be in lexicographical order. A valid combination will not contain the words that appear adjacent in the given sentence. Print "No Combinations" if there are no valid combinations.

Sample Input 1

raju always plays cricket

Sample Output 1

always cricket

cricket raju

plays raju

Sample Input 2

python is a programming language

Sample Output 2

a language

a python

is language

is programming

language python

programming python

Sample Input 3

to be or not to be

Sample Output 3

be be

be not

or to

to to

Rotate Matrix Rings

Given a matrix of order M*N and a value K, write a program to rotate each ring of matrix clockwise by K elements. If in any ring has less than or equal to K elements, then don’t rotate that ring.

Input

The first line of input will be two space-separated integers denoting M and N.

The next M lines will contain N space-separated integers.

The next line will contain integer, denoting K.

Output

The output should be M*N matrix by rotating matrix by K elements.

For example, if given M and N are 4 and 4 respectively. If matrix elements are

1 2 3 4

5 6 7 8

9 10 11 12

13 14 15 16

If given K is 3. Rotate each ring of matrix by 3 elements.

In above matrix, the elements (1, 2, 3, 4, 8, 12, 16, 15, 14, 13, 9, 5) is a ring, similarly, the elements (6, 7, 11, 10) will make a ring.

Therefore, by rotating each ring in clockwise direction by 3 elements will give (13, 9, 5, 1, 2, 3, 4, 8, 12, 16, 15, 14) and (10, 6, 7, 11). So output should be

13 9 5 1

14 7 11 2

15 6 10 3

16 12 8 4

Explain the difference between 

constructor and initializer list. With program.