Student Questions

Your favorite educational game is frozen and won't close when you click the "X." What is the best "Software" trick to try next? A) Unplug the computer from the wall while it's running. B) Use the "Task Manager" (Ctrl+Alt+Delete) to force the frozen app to close. C) Shake the mouse really fast until the game moves. D) Wait three days for the computer to fix itself.

You are typing a report and suddenly the letters stop appearing on the screen. What is the very first "Hardware" check you should perform? A) Restart the entire computer immediately. B) Check if the keyboard cable is plugged in or if the wireless battery died. C) Buy a new monitor. D) Press every key at the same time to wake it up.

You are using a public computer in the school library to check your student email. After you finish reading your messages, what is the most important "Cyber Hero" step to take before you leave? A) Delete all the emails you just read. B) Just close the browser tab or the window. C) Click "Sign Out" or "Log Out" and make sure the computer doesn't "Remember" your password. D) Turn off the computer monitor so the next person can’t see the screen.

You are sending an email to your whole class about a birthday party. You want to hide everyone’s email addresses so they can't see each other's private info. Which "Copy" box should you put the addresses in? A) To: B) Cc: (Carbon Copy) C) Bcc: (Blind Carbon Copy) D) The Subject Line

Why is it a bad idea to use "ALL CAPS" when typing an email or a message to a teacher or a friend? A) It uses up more of the computer's electricity. B) In "Netiquette" (Internet Etiquette), typing in all caps is seen as SHOUTING and can be rude. C) The computer might think it is a virus. D) All caps are harder for the Wi-Fi to send.

You get a "Forwarded" email that says: "If you don't send this to 10 people in the next hour, your computer will be deleted!" What is the best way to stop this "Chain Letter"? A) Send it to 20 people just to be safe. B) Delete the email immediately. These are fake and used to spread spam or worry people. C) Reply to the sender and tell them they are mean. D) Turn off your computer and leave it off for a week.

When you are chatting with friends in an online game, someone you don't know asks, "Hey, what school do you go to? I want to see if we live near each other!" What is the safest way to handle this? A) Tell them the name of the school but not the address. B) Ask them which school they go to first. C) Do not tell them. This is "Private Information" that should never be shared with strangers. D) Tell them, because they seem nice and have a cool avatar.

Which lossless algorithm uses a "dictionary" to replace recurring sequences of data with a reference or index? a) Huffman Coding b) Run-Length Encoding (RLE) c) Lempel-Ziv-Welch (LZW) d) Transform Coding

Which type of compression allows for the exact reconstruction of the original data? a) Lossy compression b) Saturated compression c) Lossless compression d) Mechanical compression

Which of the following file formats typically uses lossy compression? a) ZIP b) PNG c) MP3 d) FLAC

Run-Length Encoding (RLE) is most effective on data that has: a) Many different random values b) Long sequences of the same repeated values c) High-resolution video frames d) Very little redundancy

What is a "compression ratio"? a) The speed at which a file is compressed b) The measure of how much a file is reduced in size c) The quality loss in a video file d) The number of files in a compressed folder

What is the main purpose of data compression? a) To make files easier to open b) To reduce the number of bits needed to represent data c) To encrypt a file for security d) To increase the quality of an image

Sound waves are called mechanical waves because: a) They can travel through a vacuum. b) They require a material medium (solid, liquid, or gas) to travel. c) They travel at the speed of light. d) They are transverse waves.

When an object moves in a circular path with constant speed, its motion is: a) Uniform linear motion b) Non-accelerated motion c) Accelerated motion d) Motion with uniform velocity

Which of the following is true for a body moving with uniform velocity? a) Its speed is changing. b) Its acceleration is zero. c) It moves in a curved path. d) Its direction is constantly changing.

In Rutherford's gold foil experiment, most of the alpha particles passed straight through the foil. This led to the conclusion that: a) Atoms are solid spheres. b) Most of the space inside an atom is empty. c) The nucleus is negatively charged. d) Protons are distributed throughout the atom.

An atom has an atomic number of 12. What is its valency? a) 1 b) 2 c) 3 d) 4

Which subatomic particle was discovered by J.J. Thomson using the cathode ray experiment? a) Proton b) Neutron c) Electron d) Nucleus

Which tissue is responsible for the increase in the girth (width) of a plant stem? a) Apical meristem b) Intercalary meristem c) Lateral meristem d) Parenchyma