Unit notes and practice questions
Everything here is for unit 6 of the Grade 10 Information Technology textbook: what the chapter covers, the short notes, practice questions with their answers, and the lesson video where one exists.
The cards filed under this chapter on the Grade 10 Information Technology page. Open one at a time.
When you use it
Use when distinguishing an algorithm from actual programming language source code.
Watch out
Algorithms are language-independent plain instructions. They must not include syntax tied to a specific programming language.
Drafted from Grade 10 Information Communication Technology, page 204 onwards, then checked twice before it went up
| Flowchart Symbol | Function |
|---|---|
| Oval | Start or End (Terminator) |
| Parallelogram | Input or Output |
| Rectangle | Process (Computation) |
| Diamond | Decision (Conditional branching) |
| Arrow | Flow line (Flow of control) |
When you use it
Use when creating or interpreting graphical representations of algorithms.
Watch out
Do not confuse the parallelogram for input and output with the rectangle for processing.
Drafted from Grade 10 Information Communication Technology, page 204 onwards, then checked twice before it went up
| IDE Feature | Functionality |
|---|---|
| Code editor | Text editor designed to write and edit program source code |
| Compiler or Interpreter | Translates source code into machine executable instructions |
| Debugger | Tests the software to identify and solve bugs |
| GUI | Consolidates all development tools into a single central interface |
When you use it
Use when explaining the integrated components that make up a software development environment.
Watch out
An IDE is not merely a text editor. It integrates source editing, compiling, and debugging tools.
Drafted from Grade 10 Information Communication Technology, page 204 onwards, then checked twice before it went up
| Loop Component | Role in Repetition |
|---|---|
| Initialization | Sets variables to initial values and sets the exit counter |
| Computation | Executes the main processing steps of the loop |
| Test | Checks the exit condition to avoid an endless loop |
| Increment | Reinitializes or updates variables for the next loop |
When you use it
Use when constructing or tracing repetitive algorithmic logic and loop controls.
Watch out
Omitting the test or increment condition causes an infinite loop error.
Drafted from Grade 10 Information Communication Technology, page 204 onwards, then checked twice before it went up
| Level | What the code looks like | How it becomes machine code |
|---|---|---|
| Machine language (low level) | Nothing but 1s and 0s, written for one processor family. | There is nothing to translate. The processor runs it as it stands. |
| Assembly language (low level) | Short mnemonics such as MOV, ADD and JMP, one for each machine instruction, still tied to one processor family. | An assembler turns every mnemonic into its machine instruction. |
| High level, compiled | English-like words, named variables, functions and control structures: C, C++, Java. | A compiler translates the whole program first and produces a file that runs on its own. Java compiles to bytecode that a virtual machine then runs. |
| High level, interpreted | The same English-like code: Python, JavaScript, PHP. JavaScript and PHP are also called scripting because they run inside a host program such as a browser or a web server. | An interpreter translates and runs one statement at a time. |
| Markup (not a programming language) | Tags that label structure or appearance: HTML, XML, CSS. | A browser displays the tags. There is no decision and no loop, so nothing is computed. |
When you use it
Reach for this when a question asks which level a language belongs to, or what turns written code into something the processor can run. Every language above machine code passes through a translator first: an assembler, a compiler or an interpreter.
Watch out
Asked to name a programming language, students write HTML. Put every candidate through one test: can it decide or repeat? HTML has no if and no loop, so it only tags what a page contains, while Python decides what to do with it. The same slip runs the other way when C is filed as low level because it sits close to the machine. Low level means machine code and assembly, nothing else.
10 multiple-choice questions written against this chapter, each with its answer and the reason. Try one before you open the answer.
Question 1
What is an algorithm?
Answer: B A precise, step-by-step method of solving a problem
Why
An algorithm is defined as a precise method of solving a problem consisting of a sequence of unambiguous, step-by-step instructions.
Question 2
What is a flowchart?
Answer: A A graphical or schematic representation of the steps in a process
Why
A flowchart is a visual or schematic diagram that shows the major steps of work in a process using symbols and arrows.
Question 3
What does the abbreviation IDE stand for in computer programming?
Answer: C Integrated Development Environment
Why
IDE stands for Integrated Development Environment, which is an application that facilitates software development by combining coding, building, and debugging tools.
Question 4
An algorithm is described in terms of which three main activities?
Answer: A Input, process, and output
Why
Every algorithm takes well-defined inputs, performs a process (computation), and produces a well-defined output.
Question 5
Which characteristic of an algorithm states that it must terminate and not run endlessly in an infinite loop?
Answer: C Finiteness
Why
Finiteness means that an algorithm must terminate after a finite number of steps and must not enter into infinite loops.
Question 6
Which of the following is considered a disadvantage of using algorithms?
Answer: D Branching and looping statements are difficult to show.
Why
According to the textbook, disadvantages of algorithms are that writing them is time-consuming and that branching and looping statements are difficult to show.
Question 7
In a loop structure, which part represents the actual processing step?
Answer: B Computation
Why
A loop consists of four parts: initialization (setting initial values), computation (processing), test (checking exit condition), and increment (re-initialization for the next pass).
Question 8
Which fundamental feature of an IDE translates human-readable source code into a language that a computer can execute?
Answer: C Compiler
Why
A compiler is a tool that transforms source code written in a human-readable language into machine code executable by the computer.
Question 9
Which multi-language IDE began originally as a Java development environment and expanded through plugins to support languages such as C++, Python, and PHP?
Answer: A Eclipse
Why
Eclipse is a free, open-source IDE managed by the Eclipse.org Consortium that began as a Java development environment and expanded through plugins.
Question 10
How does pseudocode differ from an actual programming language?
Answer: B Pseudocode uses English-language statements without rigid syntax rules.
Why
Pseudocode is a program design aid that expresses program logic using structured English statements without being bound by rigid programming language syntax rules.
The app holds 12 questions on this unit, marked as you go. These are the first 10.
The whole Grade 10 Information Technology textbook, free as a PDF.
Ministry of Education edition, English, 234 pages
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