Exam practice
Every question from the end of every unit, with hints and answers to open. After you check an answer, mark how you did, and come back to the ones you didn’t get.
20 questions
Unit 2 · Information and Communication Technology
Exercise (Communication)
3. Fill in the blanks
Deciding where to cross the road by looking at the zebra crossing is ______ communication.
Answer
Deciding where to cross the road by looking at the zebra crossing is symbolic communication.
A tool used to carry information is called a ______ tool.
Answer
A tool used to carry information is called a communication tool.
Interpersonal communication is a ______ flow of information.
Answer
Interpersonal communication is a two-way flow of information.
Information we get through our senses goes to the ______.
Answer
Information we get through our senses goes to the mind (the brain).
Television is a means of ______ communication.
Answer
Television is a means of mass communication. (“Personal” is not needed.)
Exercise (Computer)
3. Fill in the blanks
The human brain does the work of ______, like the hard drive of a computer.
Answer
The human brain does the work of storage, like the hard drive of a computer.
The printer of a computer is an ______ device.
Answer
The printer of a computer is an output device.
The ______ from all computers are the same for the same command.
Answer
The results from all computers are the same for the same command.
Data and instructions are given to the computer through an ______ device.
Answer
Data and instructions are given to the computer through an input device. (“Processing” is not needed.)
Exercise (Typing, word processor and Paint)
3. Fill in the blanks
The ______ tab must be clicked to save a picture you made.
Answer
The File tab must be clicked to save a picture you made.
The ______ tool is used to write words in Paint.
Answer
The Text tool is used to write words in Paint.
To change how thick the pencil, eraser or brush is, the ______ command is used.
Answer
To change how thick the pencil, eraser or brush is, the Size command is used.
To cut, copy, crop, resize or rotate part of a picture, we must first ______ that part.
Answer
To cut, copy, crop, resize or rotate part of a picture, we must first select that part. (“Save” is not needed.)
4. Match the pairs
Match each tool icon above (i. to iv.) with its name: brush tool, pencil tool, text tool, shape fill tool, color fill tool, select tool.
Answer
- i. (the letter A) → text tool
- ii. (a shape filled with color) → shape fill tool
- iii. (a tipping bucket) → color fill tool (fill with color)
- iv. (a pencil) → pencil tool
The brush tool and the select tool are not needed.
Match each shortcut key with its job.
| Shortcut key | Job |
|---|---|
| Ctrl + Z | copies what you selected |
| Ctrl + P | cuts what you selected |
| Ctrl + X | pastes what you cut or copied |
| Ctrl + S | selects the whole document |
| Ctrl + C | saves the document |
| Ctrl + A | goes back one step (undo) |
| prints the document |
Answer
| Shortcut key | Job |
|---|---|
| Ctrl + Z | goes back one step (undo) |
| Ctrl + P | prints the document |
| Ctrl + X | cuts what you selected |
| Ctrl + S | saves the document |
| Ctrl + C | copies what you selected |
| Ctrl + A | selects the whole document |
“Pastes what you cut or copied” is not needed. That is Ctrl + V.
5. Answer these questions
What is the difference between information and communication? Explain with examples.
Answer
- Information is the facts and data we get about people, things, places and events. Example: “The SEE results come out next week.”
- Communication is sending that information from one place or person to another. Example: the news of the results is told on the radio, or a friend tells you on the phone.
- So information is what we share. Communication is how we share it.
What are the sources of information? Sort them, with examples.
Answer
Sources of information are where we get information from. They are of two kinds.
- Primary sources: what we observe ourselves, with our own senses. Examples: seeing dark clouds, hearing thunder, tasting food.
- Other (secondary) sources, or media: someone else collects the information and passes it on to us. Examples: newspapers, radio, television, books, the internet, mobile phones and computers.
What are the kinds of communication? Describe each one in short.
Answer
- Intrapersonal communication: it happens inside one person’s own mind. We think, compare and decide. Example: Pemba thinking that the lake could burst.
- Interpersonal communication: information goes from one person to another, or to a small group. It is two-way. Examples: talking face to face, a phone call, a class discussion.
- Mass communication: information goes from one source to a huge number of people at the same time. It is one-way. Examples: radio, television, newspapers.
Name the main parts of a computer. How are input, output, processing and storage devices different?
Answer
The main parts are the keyboard, mouse, CPU (inside the system unit), monitor, printer, speakers, and the hard disk or SSD.
- Input devices give data and commands to the computer: keyboard, mouse, microphone.
- Processing device: the CPU works on the data and turns it into results.
- Output devices show, print or play the results: monitor, printer, speakers.
- Storage devices keep data to use again later: hard disk, SSD, pen drive.
Write three ways humans and computers are alike, and three ways they are different.
Answer
Alike:
- Both take in information: we use our senses, a computer uses input devices.
- Both work on information: we use our brain, a computer uses its CPU.
- Both give out results and remember things: we speak and write, a computer shows and prints; our brain remembers, a computer stores.
Different:
- Humans have feelings. A computer has none.
- Humans have new ideas of their own. A computer only follows its programs.
- A computer works on a lot of data much faster than a human.