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Upgrade

Upgrade is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Upgrade rather than just read about it. In short: An upgrade is the result of improving something by replacing part of it or adding additional parts. For example, one can upgrade a computer by replacing the CPU with a faster one and by adding more RAM, and afterwards, the computer is an upgrade.

Key takeaways

  • Upgrade belongs to computer science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Upgrade to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Upgrade from memory before moving on to harder problems.

Reference excerpt

An upgrade is the result of improving something by replacing part of it or adding additional parts. For example, one can upgrade a computer by replacing the CPU with a faster one and by adding more RAM, and afterwards, the computer is an upgrade. Although often used in the context of technology, anything can be upgraded (improved). Often an update is an upgrade but not always. Update only implies newer (more up-to-date). An update could degrade, or changing to an older version could be an upgrade.

Hardware Common hardware upgrades include additional memory and storage, and replacing the CPU and graphics card with faster components. Updating hardware involves the risk of compatibility. For example, added RAM may not be compatible with existing RAM in a computer. Other hardware components may not be compatible after either an upgrade or downgrade, due to the non-availability of compatible drivers for the hardware with a specific operating system.

Software In order to upgrade software, a package is often downloaded over the Internet, sometimes directly by a user and sometimes automatically by a computer. The package may contain only the data needed to modify the existing version, not the entirety of the software. An upgrade may include improved functionality and bug fixes such as to eliminate a security vulnerability. Common reasons to create a software upgrade package:

Support industry regulatory requirements Access emerging technologies with new features, and tools Meet the demands of changing markets Upgrading software involves the risk of introducing a bug into the software that might cause it to malfunction. For example, in October 2005, a glitch in a update caused trading on the Tokyo Stock Exchange to shut down for most of the day. A software upgrade might result in incompatibility that causes hardware to stop functioning. A change, considered an upgrade by some, may be considered a downgrade by others. A user may prefer a different version even if the so-called upgrade functions per design. The user might be accustomed to the other version or might miss removed features (see iPhone jack removal controversy or OtherOS). A change, intended to upgrade, has the risk of bricking a device. This can happen for an embedded device in which updates are typically all-or-nothing, and which have limited ability to recover from a failed update. Solutions to this generally involve keeping multiple copies of firmware in device storage, so that one can be upgraded while the other remains intact as a fallback, but there are still holes which can cause this to fail. Tools such as Mender.io, Sysup, SWUpdate, RAUC, and OSTree provide solutions that implement upgrades in a safe atomic way, and reduce or eliminate the need to customize bootloaders and other components. Desktop systems are more likely to use something like snapshots or restore points; these are more efficient as they only require a small fraction of space to store the changes from the old system to the new one, but the lack of a turnkey implementation for embedded systems makes this impractical.

See also

Adaptation kit upgrade Advanced Packaging Tool – Free software package management systemPages displaying short descriptions of redirect targets Macintosh Processor Upgrade Card – CPU upgrade card Patch (computing) – Data and process for mutating a software resource to a desired state Software update – Process of changing installed software to newer versions Source upgrade – Modification of source code via an asset Windows Anytime Upgrade – Discontinued service by Microsoft Yellow dog Updater, Modified – Free and open-source command-line package management utilityPages displaying short descriptions of redirect targets

References

Worked examples

Example 1 — a first encounter with Upgrade

Start with the simplest possible case. Write down what Upgrade claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Upgrade before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Upgrade ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Upgrade

In research
Upgrade appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Upgrade in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Upgrade is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computing terminology, so understanding it makes those chapters shorter.
In everyday life
Look for Upgrade outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Upgrade in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Upgrade means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Upgrade out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Upgrade in simple terms?

An upgrade is the result of improving something by replacing part of it or adding additional parts. For example, one can upgrade a computer by replacing the CPU with a faster one and by adding more RAM, and afterwards, the computer is an upgrade.

Why does Upgrade matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Upgrade?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Upgrade.

Tags

  • Computing terminology

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