डेटा तेज़ है।

A natural pronunciation is:

• डेटा = ḍe-ṭā
• तेज़ = tez
• है = hai

Put together: ḍeṭā tez hai

A rough English approximation would be something like day-taa tez hai, but with Hindi sounds:

• ड is a retroflex d sound
• ट is a retroflex t sound
• ै in है sounds like the vowel in air or eh, depending on accent

The sentence breaks down like this:

• डेटा = data
• तेज़ = fast
• है = is

So the structure is basically:

• data + fast + is

Hindi often puts the verb at the end, so this matches normal Hindi word order.

Because Hindi usually follows Subject + complement + verb order.

In English, you say:

• Data is fast.

In Hindi, it becomes:

• डेटा तेज़ है।
• literally: Data fast is.

This is completely normal in Hindi. The verb है often comes at the end of simple present-tense sentences like this.

है is the present-tense form of the verb to be.

In this sentence, it means is.

So:

• वह अच्छा है। = He/it is good.
• डेटा तेज़ है। = The data is fast.

It agrees with a singular subject here.

Because डेटा is being treated as singular here.

• है = is
• हैं = are / a polite is

So:

• डेटा तेज़ है। = The data is fast.
• डेटा तेज़ हैं। would sound wrong in normal usage unless you were using some unusual respectful or special context.

If you were talking about multiple things, you might use हैं instead.

No, तेज़ is one of those adjectives that usually does not change form.

So you can have:

• लड़का तेज़ है। = The boy is fast/sharp.
• लड़की तेज़ है। = The girl is fast/sharp.
• गाड़ियाँ तेज़ हैं। = The cars are fast.

The adjective तेज़ stays तेज़.

Not only fast. तेज़ can mean several related things depending on context, such as:

• fast
• quick
• sharp
• strong/intense
• sometimes even bright

In डेटा तेज़ है, the intended meaning is something like:

• The data is fast
• or more naturally in context, The internet/data speed is fast

So the exact nuance depends on what kind of data you mean.

It is basically an English loanword that is very commonly used in Hindi, especially in technology and mobile/internet contexts.

Hindi speakers often use words like:

• डेटा = data
• फोन = phone
• नेट = net/internet
• मोबाइल = mobile phone

So yes, डेटा is perfectly normal in modern everyday Hindi.

Because Hindi does not use articles like a, an, and the the way English does.

So:

• डेटा तेज़ है।

can mean:

• Data is fast
• The data is fast

The exact meaning depends on context.

It is understandable, especially in a modern tech context, but in everyday speech people might say something more specific depending on what they mean.

For example:

• इंटरनेट तेज़ है। = The internet is fast.
• नेट तेज़ है। = The net is fast.
• डेटा बहुत तेज़ चल रहा है। = The data is running very fast.
• डेटा स्पीड तेज़ है। = The data speed is fast.

Still, डेटा तेज़ है। is simple and understandable for learning purposes.

That dot is called a nukta.

It changes the sound of the letter:

• ज = j
• ज़ = z

So तेज़ is pronounced with a z sound: tez.

You may sometimes see people omit the nukta in casual writing, but the spelling तेज़ makes the pronunciation clearer.

In very casual speech, especially in headlines, notes, or poetic style, Hindi may sometimes omit the verb to be. But in standard complete sentences, you usually keep it.

So the normal full sentence is:

• डेटा तेज़ है।

Without है, it would sound incomplete for a beginner’s standard Hindi model.

A very useful pattern is:

• [noun] + [adjective] + है

Examples:

• पानी ठंडा है। = The water is cold.
• घर बड़ा है। = The house is big.
• डेटा तेज़ है। = The data is fast.

This is one of the most common sentence patterns in Hindi.