A munkavállaló az irodában dolgozik.

Both a and az mean the in Hungarian.

The choice depends on the sound that follows:

• a is used before a word beginning with a consonant
• az is used before a word beginning with a vowel

So:

• a munkavállaló = the employee
• az irodában = in the office

This is similar to how English uses a / an, but in Hungarian it happens with the definite article instead.

Munkavállaló is a formal word meaning employee.

It can be broken down like this:

• munka = work
• vállal = to undertake, to take on
• -ó = a suffix that can make a person-word, roughly one who does ...

So the literal idea is something like a person who takes on work.

In real usage, though, you should just learn it as employee.

The ending -ban means in.

So:

• iroda = office
• irodában = in the office / in an office

Hungarian often uses suffixes instead of separate prepositions. Where English says in the office, Hungarian puts the location idea directly onto the noun.

The basic pair is:

• -ban / -ben = in

Which one you use depends on vowel harmony.

Because Hungarian usually expresses meanings like in, on, to, from, and so on with case endings attached to nouns.

So English:

• in the office

Hungarian:

• az irodában

Here:

• az = the
• irodá-ban = office-in

This is one of the biggest differences from English: Hungarian prefers suffixes where English prefers separate little words.

This is because of vowel harmony, a very important feature of Hungarian.

Hungarian suffixes often come in different versions, and the version must match the vowels in the word.

• back-vowel words usually take -ban
• front-vowel words usually take -ben

iroda contains back vowels, so it becomes:

• irodában

More examples:

• házban = in the house
• iskolában = in the school
• kertben = in the garden
• székben = in the chair

You do not need to analyze every vowel perfectly at first, but it is good to notice that suffixes change shape to match the word.

Hungarian word order is more flexible than English word order.

In a neutral sentence like this, putting the verb near the end is very natural:

• A munkavállaló az irodában dolgozik.

This is a neutral statement: The employee works in the office.

But Hungarian word order can change for emphasis. For example:

• A munkavállaló dolgozik az irodában.
  Also possible, but the focus feels a little different.

So the sentence you were given is a normal, natural Hungarian sentence, but not the only possible order.

Hungarian usually does not need subject pronouns when the subject is clear.

The verb ending often gives enough information, and in this sentence the noun is already stated:

• A munkavállaló ... dolgozik = The employee ... works

Since a munkavállaló is already the subject, there is no need to add he/she.

Even in sentences without a noun, Hungarian often leaves the pronoun out:

• Dolgozik. = He/She is working or works, depending on context

This is normal in Hungarian.

Dolgozik is the verb to work in the third person singular present tense.

So it means:

• he/she works
• the employee works

The dictionary form is dolgozni = to work.

A few present-tense forms are:

• dolgozom / dolgozok = I work
• dolgozol = you work
• dolgozik = he/she works

So in your sentence, dolgozik agrees with the singular subject a munkavállaló.

It is correct and very common in formal, legal, HR, and workplace contexts.

But in everyday speech, people might also say:

• dolgozó = worker / employee
• alkalmazott = employee
• munkás = worker, laborer (not always the same meaning)

So:

• A munkavállaló az irodában dolgozik.
  is perfectly correct, but it sounds a bit formal or official.

A more everyday version might be:

• A dolgozó az irodában dolgozik.

Though that can sound a little repetitive in English translation too. In real life, Hungarians might more often use a name, a pronoun, or another noun depending on context.

Yes, you can.

Both are grammatical:

• A munkavállaló az irodában dolgozik.
• A munkavállaló dolgozik az irodában.

The difference is mostly about information structure and emphasis, not basic meaning.

Very roughly:

• A munkavállaló az irodában dolgozik.
  neutral, with works coming at the end
• A munkavállaló dolgozik az irodában.
  also natural, but the rhythm and focus are a little different

At an early stage, it is enough to know that Hungarian word order is flexible, and native speakers choose an order based on what they want to highlight.

A rough pronunciation guide is:

• A = short aw
• munkavállaló ≈ MOON-kaw-vaal-laa-loh
• az = az
• irodában ≈ EE-ro-daa-ban
• dolgozik ≈ DOL-go-zik

A few useful pronunciation notes:

• Hungarian stress is usually on the first syllable of each word.
• á is a long vowel, different from short a.
• ó is also long.
• Hungarian spelling is quite regular, so pronunciation is more predictable than in English.

So the stress pattern is roughly:

A MUN-ka-vál-la-ló az I-ro-dá-ban DOL-go-zik.