All Free Computer Science and IT MCQs with Answers

1191. What is the most common tool used to restrict access to a computer system?

• A. User logins
• B. Passwords
• C. Computer keys
• D. Access-control software

Explanation: Passwords are the most common basic method of restricting access because they authenticate a user's claimed identity. User logins identify accounts, but the password is the secret used to protect them.

1192. ____________is the measurement of things such as fingerprints and retinal scans used for security access?

• A. Biometrics
• B. Bio measurement
• C. Computer security
• D. Smart weapon machinery

Explanation: Biometrics uses measurable physical or behavioural characteristics, such as fingerprints, iris patterns, or retinal scans, to verify identity. The other choices are not standard names for this security method.

1193. A modem is connected to_____________?

• A. a telephone line
• B. a keyboard
• C. a printer
• D. a monitor

Explanation: A modem converts digital computer data to signals suitable for transmission over a telephone line and converts incoming signals back. It is therefore connected to the telephone line for communication.

1194. The process of transferring files from a computer on the Internet to your computer is called_____________?

• A. Downloading
• B. uploading
• C. FTP
• D. JPEG

Explanation: Downloading means receiving files from an Internet computer onto your own computer, while uploading sends files in the opposite direction. FTP is a file-transfer protocol, not the name of the process itself.

1195. A device that connects to a network without the use of cables is said to be___________?

• A. Distributed
• B. free
• C. centralized
• D. none of these

Explanation: A network connection without cables is normally called wireless, but that word is missing from the options. Therefore, none of the listed choices correctly names the device or connection.

1196. _____________are used to identify a user who returns to a Website?

• A. Cookies
• B. Plug-ins
• C. Scripts
• D. ASPs

Explanation: Cookies are small pieces of data stored by a website or browser that help recognise a returning user. Plug-ins extend browser functions, while scripts are programs executed on a webpage.

1197. All of the following are examples of real security and privacy risks EXCEPT____________?

• A. hackers
• B. Spam
• C. Viruses
• D. identity theft

Explanation: Hackers, viruses, and identity theft directly threaten computer security or personal privacy. Spam is unwanted bulk messaging and is mainly an annoyance, although it can sometimes carry malicious links.

1198. A device, which is not connected to CPU, is called as___________?

• A. land-line device
• B. On-line device
• C. Off-line device
• D. Device

Explanation: An off-line device is not directly connected to, or under the immediate control of, the CPU. An online device has an active connection to the computer system.

1199. To move a copy of file from one computer to another over a communication channel is called?

• A. File transfer
• B. File encryption
• C. File modification
• D. File copying

Explanation: Moving a file from one computer to another through a network or communication channel is called file transfer. Encryption changes the file into a protected form, while copying may occur on the same computer.

1200. Unwanted repetitious messages, such as unsolicited bulk e-mail is known as_________?

• A. Spam
• B. Trash
• C. Calibri
• D. Courier

Explanation: Spam is the term for unsolicited bulk electronic messages, especially unwanted email. Trash is a storage or deletion term, while Calibri and Courier are fonts.