computer science

Method stub

Method stub 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 Method stub rather than just read about it. In short: A method stub is a short and simple placeholder for a method that is not yet written for production needs. Generally, a method stub contains just enough code to allow it to be used – a declaration with any parameters, and if applicable, a return value.

Key takeaways

Method stub 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 Method stub to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Method stub from memory before moving on to harder problems.

Reference excerpt

A method stub is a short and simple placeholder for a method that is not yet written for production needs. Generally, a method stub contains just enough code to allow it to be used – a declaration with any parameters, and if applicable, a return value. A method stub may be used to implement an interface that is defined but for which the implementation is not available.

Example In the following example pseudocode, the function ReadThermometer returns a particular value even though ultimately it is supposed to read a value from a hardware source. It returns a valid value, allowing consuming code to be runnable. The function ignores the input parameter source which is common for a stub.

function ReadThermometer(Source source) return 28 end function

Distributed computing In distributed computing, stub is like a mock object – simulates existing code, such as a procedure on a remote machine. Such stubs can be useful in porting. In RMI nomenclature, a stub on the client-side communicates with a skeleton on the server-side.

Windows/MS-DOS In Windows and MS-DOS, stub is like a shim – small interface code left in conventional memory by self-relocating resident drivers which move most of themselves into upper memory, the high memory area, expanded or extended memory as well as similar stubs to allow the relocated code to communicate with real-mode DOS in conjunction with DOS extenders (like DPMI, DPMS, CLOAKING or NIOS).

See also Abstract method Mock object Dummy code Test stub Glue code Shim (computing) DOS stub

References

External links A Stub Generation System For C++ (PDF) Stub/mock frameworks for Java Review and comparison of stub & mock frameworks for Java

Worked examples

Example 1 — a first encounter with Method stub

Start with the simplest possible case. Write down what Method stub 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 Method stub 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 Method stub 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 Method stub

In research: Method stub 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 Method stub 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: Method stub is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computer programming folklore, Software development, Unit testing, so understanding it makes those chapters shorter.
In everyday life: Look for Method stub 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.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Method stub in 20 minutes

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

Frequently asked questions

What is Method stub in simple terms?

Why does Method stub 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 Method stub?

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 Method stub.