Die kontrolesom en die herstelpunt is gereed.

Because both nouns are separately marked as definite:

• die kontrolesom = the checksum
• die herstelpunt = the restore point

In Afrikaans, it is very normal to repeat die before each noun in a phrase joined by en.

So:

• die kontrolesom en die herstelpunt = the checksum and the restore point

If you left out the second die, it could sound less natural here.

Here, die means the.

Afrikaans die is the normal definite article for singular and plural nouns:

• die boek = the book
• die boeke = the books

That is different from English, where the does not change anyway, but it is worth noticing that Afrikaans also uses one form.

Because Afrikaans does not change the present-tense form of wees (to be) the way English does.

In English:

• the checksum is
• the checksums are

In Afrikaans, the present tense is simply is for all persons and numbers:

• Ek is
• Jy is
• Hy is
• Ons is
• Hulle is

So even with a compound subject like Die kontrolesom en die herstelpunt, the verb is still is.

Gereed is an adjective, meaning ready.

In this sentence it comes after is, so it is a predicate adjective:

• Die kontrolesom is gereed.
• Die herstelpunt is gereed.

Afrikaans often works like English here: is ready.

Because Afrikaans adjectives used after a linking verb usually do not change for number.

So both of these are correct:

• Die kontrolesom is gereed.
• Die kontrolesom en die herstelpunt is gereed.

The adjective stays gereed in both cases.

This is simpler than in some languages where adjectives agree with number or gender.

Yes. Afrikaans very often writes compound nouns as one word.

So:

• kontrole + som → kontrolesom
• herstel + punt → herstelpunt

This is very common in Afrikaans and also in Dutch and German. English often writes similar ideas as two words, hyphenated words, or one word depending on the term, but Afrikaans strongly prefers the one-word compound.

En means and.

It joins the two nouns:

• die kontrolesom
• die herstelpunt

So the structure is simply:

• [noun phrase] + en + [noun phrase] + is + gereed

The basic word order is:

• Subject: Die kontrolesom en die herstelpunt
• Verb: is
• Complement: gereed

So it follows a normal Afrikaans main-clause pattern:

• Subject + verb + rest

This is very close to English:

• The checksum and the restore point are ready.

The main difference is that Afrikaans keeps is.

You could, but it would sound marked or literary. The normal, neutral sentence is:

• Die kontrolesom en die herstelpunt is gereed.

Starting with gereed would give special emphasis, and it is not the usual choice for everyday neutral statements.

A simple learner-friendly approximation is:

• ge-REET

A few helpful points:

• The ge- is usually light and unstressed.
• The ee is a long vowel.
• The final d may sound softer than an English d, depending on accent.

The stress is mainly on the second syllable: ge-REED / ge-REET.

It is neutral and perfectly natural, especially in technical or computer-related language.

The nouns kontrolesom and herstelpunt are technical terms, but the grammar is completely standard everyday Afrikaans:

• die = article
• en = conjunction
• is = present tense of to be
• gereed = adjective

So the sentence is straightforward standard Afrikaans.