Она дала интервью.

Because Russian past tense agrees with the subject in gender and number.

• она дала = she gave
• он дал = he gave
• оно дало = it gave
• они дали = they gave

Since она means she, the feminine singular form дала is required.

The dictionary form is дать, which means to give.

In this sentence, дала is:

• past tense
• feminine singular
• perfective

So it means gave in the sense of a completed action.

Because дать интервью is a normal Russian expression meaning to give/grant an interview.

So although дать literally means to give, the whole phrase дать интервью is idiomatic and very common.

You can think of it as a set expression:

• дать интервью = to give an interview
• давать интервью = to be giving / to give interviews regularly

This is a question of aspect.

• дала интервью = perfective
  Focuses on the completed result: she gave an interview.

• давала интервью = imperfective
  Focuses on the process, repetition, habit, or background.

For example:

• Вчера она дала интервью. = Yesterday she gave an interview.
• Она часто давала интервью в те годы. = She often gave interviews in those years.

So in your sentence, дала suggests a single completed event.

It is in the accusative case, because it is the direct object of the verb дала.

However, интервью is an indeclinable noun, so its form does not change. That means it looks the same in different cases.

Here it is functioning as:

• nominative in Это интервью интересное.
• accusative in Она дала интервью.

The form stays интервью.

Yes. Интервью is usually treated as neuter.

That matters when you add adjectives or pronouns:

• интересное интервью = an interesting interview
• новое интервью = a new interview

Even though the noun itself does not change form, other words around it can show its gender.

Here it is most naturally understood as singular: an interview.

A tricky point is that интервью often has the same form in both singular and plural, because it is indeclinable. Usually context tells you which one is meant.

Compare:

• Она дала интервью. = She gave an interview.
• Она дала несколько интервью. = She gave several interviews.

Without extra context, your sentence is normally read as singular.

Yes, often it can.

Russian frequently omits subject pronouns when the subject is clear from context. So in conversation, you might hear simply:

• Дала интервью.

However, there is an important detail: past tense forms in Russian show gender and number, but not person. So дала tells you the subject is a singular feminine person, but not explicitly she. Because of that, the pronoun may be kept when the speaker wants to be clear or when the sentence stands alone.

So:

• Она дала интервью. = clear, complete standalone sentence
• Дала интервью. = natural when context already makes the subject obvious

Because Russian has no articles.

So Она дала интервью can mean:

• She gave an interview
• She gave the interview

Context tells you which meaning is intended.

This is very normal in Russian, and learners have to get used to understanding definiteness from the situation rather than from a separate word.

No, Russian word order is fairly flexible. But Она дала интервью is the most neutral, straightforward order.

Other orders are possible if you want emphasis or a different information focus, for example:

• Интервью она дала вчера.
• Дала она интервью неохотно.

In a basic textbook sentence, Она дала интервью is the neutral way to say it.

The usual stress is:

она́ дала́ интервью́

So the stress falls on the last syllable of each word here.

A rough pronunciation guide:

• она́ = ah-NA
• дала́ = dah-LA
• интервью́ = een-teer-VYU

The final word can be a little tricky because of the consonant cluster, so it is worth listening to native pronunciation a few times.