SpringCM On-Site

Question 1

What is a namespace

Answer 1

A namespace is designed for providing a way to keep one set of names separate from another. The class names declared in one namespace does not conflict with the same class names declared in another. Similar to a package in Java

Question 2

What is using keyword

Answer 2

It is similar to an import statement. It means that you are bringing in a namespace to another location. Or namespace

Question 3

Name 3 ways to pass parameters to a method

Answer 3

Value parameters : This method copies the actual value of an argument into the formal parameter of the function. In this case, changes made to the parameter inside the function have no effect on the argument.

Reference parameters : This method copies the reference to the memory location of an argument into the formal parameter. This means that changes made to the parameter affect the argument.

Out parameters : This method helps in returning more than one value.

Question 4

What is the ultimate base class for everything in C#

Answer 4

The Object class.

Question 5

Boxing vs. Unboxing

Answer 5

Boxing: When a value type is converted to an object. Think int to Integer.
Unboxing: When an object is converted to a value type

Question 6

what are dynamic type variables?

Answer 6

You can assign these to variables and their types are checked at RUNTIME

Question 7

How to extend a class in C#

Answer 7

MyClassSub : MySuperClass

Question 8

What is a sealed class?

Answer 8

A class that cannot be inherited

Question 9

Difference between value type and reference type

Answer 9

Value type directly contain data (i.e int, char, float)

Reference types do not contain actual data of variable but a reference to the the variable. Points to memory location

Question 10

pointer types in c#?

Answer 10

store the memory address of another type. behave like pointers in c#. these are

Question 11

How do you cast in c#

Answer 11

you can use the as keyword. Obj as StringBuilder

(Stringbuilder) Obj <= java equivalent

Question 12

what are Nullable types?

Answer 12

These are types similar to normal value types but also allow a null. Nullable would allow for a null integer.

Question 13

How can you enforce garbage collection in .NET

Answer 13

System.GC.Collect();

Question 14

Stack vs Heap

Answer 14

stack: stores value types
heap: stores reference types

Question 15

How would you improve your solution?

Answer 15

Maybe use a lambda or two? It would make it easier to code, but i believe I wrote my solution to be as readable as possible
I think using an enumuration for the test text files would be better. However, I believe C# doesn’t support String enums.
I think for larger text files, it would make sense to divide the content into chunks. This could split the work into separate threads. However, it seemed as if it finally took a millisecond around a couple thousand words.
Could I have used LINQ to possibly make a query? LINQ is a bit more expressive. It might have been easier to do this instead