Questions

The most straightforward way to create a question is to use the right intonation. In such a case, a sentence does not change at all.

Ty máš nové boty. You have new shoes.
Ty máš nové boty? Do you have new shoes?

The second way is to use the VSO (verb - subject - object) word order.

Petr má nové boty. Peter has new shoes.
Má Petr nové boty? Does Peter have new shoes?

Question words:
který? - which/what?
masculine: který - kteří
feminine: která - které
neuter: které - která

jaký? - which/what?
masculine: jaký - jací
feminine: jaká - jaké
neuter: jaké - jaká

kdo? - who?
kde? - where?
co? - what?
proč? - why?
jak? - how?
kdy? - when
kolik? - how much?
kolik? how many?

The question words must be at the beginning of the sentence.
Kolik má Petr nových bot? For example, - How many new shoes does Peter have?

question tags
= short questions that go after indicative. They are used to make sure that what the speaker is saying is true
viď? (see? is that right? isn't it?)
že jo? (right?)
je to tak? (is it so?)
je to pravda? (is that right?)

Je to dobrá sušenka, že jo?
Je to dobrá sušenka, viď?
(It is a tasty biscuit, isn't it?)