viernes, 24 de noviembre de 2017

Types of Questions #3

Coding Fundamentals

What is a variable?

A place to store data

What is the difference between an integer and a float variable?

Integer just stores whole numbers or integral values, while a float variable stores numbers with potential use of decimals.

What is a conditional operator?

(!=, ==, >=, <=, …). Those are operators that compare two values in a conditional statement.

What is the difference between using ‘=’ and ‘==’ operators?

‘=’ is used to assign a value to a variable. “==” is a conditional operators that is used to compare values in a conditional statement.

What are conditional statements?

A conditional statement is an if-then statement. The conditional is defined to be true or false due to the operation you are leading.

What is a loop?

It is an operational cycle that goes through a conditional statement while this is true and executes a block of code.

What is the difference between a ‘for’ loop, a ‘while’ loop, and a ‘do-while’ loop?

for () performs statements repeatedly based on a condition.
while () performs statements repeatedly while condition remains true.
Do-while() performs statements repeatedly (at least once) while  condition remains true.

What is an array?

An array is a data structure that contains a number of variables, which are accessed through computed indices.

The variables contained in an array, are called the elements of the array. They must all be of the same type, and this type is called the element type of the array

How do you store/retrieve values in an array?

Declaration, Creation, Initialization. When an array is initialized there are methods that push or pull data into an array. Commonly the way to manipulate arrays is using cycles (loop, while, do-while).

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