A Level Codes

🎓 GCSE & A Level Computer Science Teacher
💻 Daily A Level Computer Science revision.
⚡ Bite-sized questions. Clear answers. Better grades.

[A Level Codes @alevelcodes]

Answer

Registers are extremely small, high-speed storage locations inside the CPU.

They provide much faster access than RAM, allowing instructions and data to be processed efficiently.

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🎓 A Level Computer Science

📖 Unit 1

Why does the CPU use registers instead of storing everything in RAM?

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[A Level Codes @alevelcodes]

Answer

Cache memory is much faster than RAM and is located closer to the CPU.
It stores frequently used data and instructions so the CPU spends less time waiting for information, improving performance.

[A Level Codes @alevelcodes]

🎓 A Level Computer Science

📖 Unit 1

Why does a computer need cache memory if it already has RAM?

Explain your answer.

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[A Level Codes @alevelcodes]

Answer

Cache memory is much faster than RAM and is located closer to the CPU.

It stores frequently used data and instructions so the CPU spends less time waiting for information, improving performance.

[A Level Codes @alevelcodes]

Answer

No.

The CPU fetches, decodes and executes instructions. Files and programs are stored in secondary storage, while the CPU only processes instructions currently in memory.

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🎓 A Level Computer Science

📖 Unit 1: Fundamentals of Computer Systems

A student says:

'The CPU stores all of a computer's files and programs.'

Is the student correct?

Explain your answer.

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[A Level Codes @alevelcodes]

@ishabytes9 These questions are designed for A Level ICT students and beginners learning web development—not experienced developers.

Everyone starts somewhere.

[A Level Codes @alevelcodes]

@ishabytes9 @X Let's connect! Love everything. I can't choose between front or backend

[A Level Codes @alevelcodes]

@Automateby_Priy Hi. Building some projects. One is a multi frontend API project for basic staff: login, contact, etc

[A Level Codes @alevelcodes]

@Ritanshu347 @X Let's connect. I'm building a tweeter finder. Sometimes trying to scape the regular feed of the account

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@anuj_shashimal @X Let's connect mate

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@konig0000 Let's connect!

[A Level Codes @alevelcodes]

It specifies the destination of a hyperlink.

Without `href`, an `<a>` tag isn't a usable link.

[A Level Codes @alevelcodes]

💻 WEB QUESTION

What does the `href` attribute do?

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[A Level Codes @alevelcodes]

Use `POST` when sending sensitive data or submitting forms.

`GET` puts data in the URL.

[A Level Codes @alevelcodes]

💻 WEB QUESTION

When should you use `POST` instead of `GET`?

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[A Level Codes @alevelcodes]

A class lets you apply the same style to multiple elements.

Write the CSS once. Reuse it anywhere.

[A Level Codes @alevelcodes]

💻 WEB QUESTION

Why use a CSS class?

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[A Level Codes @alevelcodes]

Use a class.

A class is designed to be reused on multiple elements.

An id should identify one unique element on the page.

[A Level Codes @alevelcodes]

💻 A LEVEL WEB QUESTION

You're styling several buttons with the same design.

Should you use an id or a class?
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