Lesson 8 – Programming & Application Development Fundamentals

by
COMPTIA ITF+ Lesson 8 Software Development & Programming Basics

Lesson 8: Software Development & Programming Basics

Learn how software is built: algorithms, source code, compiled vs interpreted, and the core building blocks of programming—plus how applications use APIs to communicate.

Algorithm = steps to solve a problem Variables store values Conditionals make decisions Loops repeat actions Functions reuse logic API = app-to-app communication

1) What is programming?

Programming is writing instructions that a computer can follow. Those instructions are written in a programming language such as Python, JavaScript, C#, or Java. An application is a program built for users.

2) Algorithms

An algorithm is a step-by-step process used to solve a problem. Before you write code, you should be able to explain the logic in plain English first.

Example: login algorithm
1) Ask for username
2) Ask for password
3) Compare to stored values
4) If they match → allow access; else → deny

3) Source code vs machine code

Source code is human-readable instructions. Computers ultimately execute machine code in binary form. A compiler or interpreter translates your source code into something the system can actually run.

4) Compiled vs interpreted

  • Compiled: translated ahead of time, often leading to faster runtime performance. Example: C/C++.
  • Interpreted: translated as it runs, often making testing and iteration easier. Example: Python or JavaScript.

5) Core programming building blocks

These concepts show up in almost every language:

Variables & data types

A variable stores a value. A data type describes what kind of value it is, such as a number, text string, or true/false value.

Variables
age = 18
name = “Jordan”
isMember = true

Conditionals (IF / ELSE)

A conditional lets code make decisions. If something is true, do one thing; otherwise, do something else.

Conditional
if age >= 18:
  print(“Adult”)
else:
  print(“Minor”)

Loops (FOR / WHILE)

A loop repeats actions—either a set number of times with a FOR loop, or until a condition changes with a WHILE loop.

Loop
for i in range(5):
  print(“Hello”)

Functions

A function is reusable code that performs a task. It can take input, process it, and return output.

Function
function add(a, b) {
  return a + b;
}

APIs (Application Programming Interfaces)

An API is a structured way for one application to request data or actions from another application, often over HTTP. A weather app asking for a forecast or a website requesting payment authorization are both common API examples.

SDLC (Software Development Life Cycle)

Software is built in stages: plan, design, develop, test, deploy, and maintain. Understanding the SDLC helps you troubleshoot, document, and communicate more clearly in IT roles.

ITF+ mindset: You do not need to become a programmer to benefit from this lesson. If you can read basic code and recognize variables, conditionals, loops, functions, and API calls, you will troubleshoot applications and systems faster.

Next Lesson

Continue whenever you’re ready.

Continue → Lesson 9
COMPTIA ITF+ Lesson 8 Advanced Quiz

Lesson 8 Quiz: Software Development & Programming Basics

10 questions. Mix of single-choice and multi-select. Score ≥ 75% to unlock the next lesson button.

Runs entirely in your browser. Progress is saved on this device only (localStorage).

🧠 Advanced Quiz

Submit when ready — you’ll get explanations for every question.

0/10 answered Pass: 75% Saved: —
Question 1
Which best describes an algorithm?
Single
Correct: B. An algorithm is a structured set of steps (logic) used to solve a problem — often written in plain English or flowcharts before coding.
Question 2
What does a compiler typically do?
Single
Correct: C. A compiler translates source code into an executable form (machine code or intermediate code) before running.
Question 3
Select ALL examples of a data type.
Multi
Correct: A, C, D. Integer, Boolean, and String are data types. A loop is a control structure, not a type.
Question 4
What is the main purpose of a variable?
Single
Correct: A. Variables hold data (numbers, text, true/false, etc.) so code can reuse and modify it.
Question 5
Which code pattern most strongly indicates a loop?
Single
Correct: D. for/while keywords indicate repeating a block of code.
Question 6
Select ALL that are true about functions.
Multi
Correct: B, C. Functions are reusable code blocks; they can accept parameters and return values.
Question 7
Which best describes an API in plain English?
Single
Correct: B. APIs are “rules + endpoints” that let software talk to other software (often via HTTP requests).
Question 8
Which is the best example of an API call?
Single
Correct: A. An HTTP request to an endpoint (GET/POST/etc.) is an API call.
Question 9
Select ALL stages that commonly appear in the SDLC.
Multi
Correct: A, D. SDLC includes phases like planning, design, development, testing, deployment, and maintenance.
Question 10
What’s a key difference between compiled and interpreted code?
Single
Correct: C. Compilers translate code before execution; interpreters translate at runtime (often line-by-line or JIT).
Status: Answer all questions, then click Submit.
Multi-select questions require selecting all correct and only correct options to get credit.

Next Lesson

Score ≥ 75% to unlock.

Locked 🔒

Leave a Comment