L'entrevista de feina és genial.

Because entrevista is a feminine singular noun, so its normal article is la. But in Catalan, la becomes l' before a vowel sound:

• la entrevista → l'entrevista

This is called elision. It works a lot like French apostrophes in forms such as l'école.

So:

• la feina
• l'entrevista

De feina literally means of work or related to work, but in this sentence it functions naturally as job in English.

So entrevista de feina means:

• job interview
• literally, interview of work / interview for work

Catalan often uses noun + de + noun where English prefers a compound noun.

Compare:

• entrevista de feina = job interview
• sabates de muntanya = mountain shoes / hiking boots
• taula de fusta = wooden table or table made of wood

És is the 3rd person singular form of the verb ser:

• jo soc
• tu ets
• ell/ella és

It means is.

The accent matters because es without an accent is a different word, often a reflexive pronoun, like himself/herself/itself or part of a pronominal verb.

So:

• és = is
• es = pronoun

The accent helps distinguish them in writing.

Because some Catalan adjectives have the same form for masculine and feminine. Genial is one of them.

So you get:

• un dia genial
• una entrevista genial

No change is needed.

Only the plural changes:

• genial → singular
• genials → plural

So:

• L'entrevista és genial
• Les entrevistes són genials

A simple learner-friendly pronunciation guide would be:

len-treh-BEES-tuh duh FAY-nyuh ez juh-nee-AL

A few useful notes:

• l'entrevista: the l' links directly to the next word
• v in many Catalan varieties sounds very close to b
• feina contains ei, pronounced roughly like ay
• ny in feina sounds like the ny in canyon
• és sounds like ess with a clear vowel
• the final stress in genial falls on the last syllable: ge-ni-AL

They are related, but they are not always used in exactly the same way.

• feina often means job, work, or task
• treball often means work in a broader sense, or piece of work

In the expression entrevista de feina, feina is the normal and very natural choice for job interview.

You may also hear:

• entrevista de treball

but entrevista de feina is usually the more everyday, idiomatic way to say it.

Yes, you could. Laboral means work-related or employment-related, so entrevista laboral is understandable and correct.

However, entrevista de feina is often more natural in everyday speech.

Roughly speaking:

• entrevista de feina = more common and conversational
• entrevista laboral = a bit more formal or technical

Because Catalan usually needs an article here when talking about a specific thing.

• L'entrevista de feina és genial = The job interview is great

Without the article, the sentence would sound incomplete or unnatural in normal Catalan.

Catalan uses articles quite regularly, often more than English does in some contexts.

The structure is:

• L'entrevista de feina = subject
• és = verb
• genial = adjective / subject complement

So it is basically:

Subject + verb + adjective

This is very similar to English:

• The job interview
  • is
    • great

That makes this sentence a nice beginner-friendly example, because the word order is straightforward.

Entrevista is feminine.

That is why it takes:

• la entrevista
• l'entrevista before a vowel

One clue is the ending -a, which often signals a feminine noun in Catalan, though not always.

You can see the feminine article clearly in forms like:

• una entrevista
• la primera entrevista

So in this sentence, the noun is feminine singular.