Programming Fundamentals

Question 1

What is the structure to specify a new variable?

Answer 1

Type Identifier = Value

i.e int myAge = 30;

Question 2

What syntax is used to create a variable without specifying its type?

Answer 2

var
i.e var name1 = "John"

Question 3

How do you write to console a sentence referencing variables using string interpolation?

Answer 3

Console.WriteLine($”Variable name is {varialbe}”)

$ calls variables enclosed in {} brackets

Question 4

What is the procedure to redefine an existing variable?

Answer 4

Identifier = Value

You cannot reassign variable type once already defines

Question 5

How do you write to console a sentence referencing variables without using string interpolation?

Answer 5

Console.WriteLine(“Variable name is {0} and age is {1}”, name, age)
You put the variables after the string which substitutes the values in {} brackets

Question 6

What is the syntax for Boolean operators?

Answer 6

&& - and
|| - or
^ -xor

Question 7

What is the most efficient way to increment a value by 1?

Answer 7

x++ /++x

Question 8

What is the most efficient way to increment a value by more than 1?

Answer 8

x += 2

Question 9

What is the syntax for comparison operators?

Answer 9

<
>
<=
>=
==
!=

Question 10

What is the construct of a for loop?

Answer 10

Initialisation, Test, Statement
for(int i = 0; i < 10; i++)
*Runs once regardless 
*Test is evaluated after statement is executed
*You must use i

Question 11

What is the construct for a do while loop?

Answer 11

do
{
} while();

Question 12

What is a do while loop?

Answer 12

Executes its code once regardless of of the statement boolean value

Question 13

What is a constant?

Answer 13

Immutable assigned value, does not change

Question 14

What is an enumerator?

Answer 14

A distinct type that contains set of constants, with a default value of 0 that increments by 1

Question 15

What is the construct to create a constant?

Answer 15

const name1 = "Yarn"
Must specify const otherwise default is a variable

Question 16

What is the construct for an enumerated constant

Answer 16

Create:
enum TransportMode{
Bicycle,
Car,
Train}

Call:
TransportMode.Train

Question 17

Where in the syntax are enumerated constants created?

Answer 17

Under the class program, referenced under Main method

Question 18

What is the value of an enumerated constant?

Answer 18

A string, the set of the enumerated constant

Must cast to an int to use the value of the constant

Question 19

What is a switch statement?

Answer 19

Allows you to pick a path of many, depending on the value, alternative to if statement

Question 20

What is the construct for forming a switch statement?

Answer 20

switch (position) {
case 1: //1 represents value of position
      ConsoleWriteLine("First Place")
      break;
default: ("None of the cases are true") }

Question 21

How do you create an array with 5 items?

Answer 21

int[] myA = int[5]

*first item will be index myA[0], last index myA[4]

Question 22

What is an “is a” relationship?

Answer 22

A class that inherits members from another