All Free Computer Science and IT MCQs with Answers

231. Where does most data go first with in a computer memory hierarchy ?

• A. RAM
• B. ROM
• C. BIOS
• D. CACHE

Explanation: RAM is the main working memory where programs and data are placed for active processing. Cache is checked for frequently used copies, but it is a smaller high-speed store rather than the usual initial destination for most data.

232. The ability to recover and read deleted or damaged files from a criminal's computer is an example of a law enforcement speciality called___________?

• A. robotics
• B. simulation
• C. computer forensics
• D. animation

Explanation: Computer forensics recovers, preserves, and analyses digital evidence, including deleted or damaged files from a suspect’s computer. Robotics, simulation, and animation are unrelated application areas.

233. Computers manipulate data in many ways, and this manipulation is called___________?

• A. upgrading
• B. processing
• C. batching
• D. utilizing

Explanation: Processing is the manipulation of raw data to produce useful results or information. Upgrading changes hardware or software, while batching is only one method of processing jobs.

234. Computers process data into information by working exclusively with____________?

• A. multimedia
• B. word
• C. numbers
• D. characters

Explanation: Computers represent all forms of data internally as numeric binary values, including text, images, and sound. Thus, numbers are the underlying form even when the displayed content is characters or multimedia.

235. ______________is the science that attempts to produce machines that display the same type of intelligence that humans do?

• A. Nanoscience
• B. Nanotechnology
• C. Simulation
• D. Artificial intelligence (Al)

Explanation: Artificial intelligence aims to make machines perform tasks associated with human intelligence, such as learning, reasoning, and problem-solving. Nanoscience and nanotechnology concern extremely small-scale materials and devices, not machine intelligence.

236. Which of the following is NOT one of the four major data processing functions of a computer?

• A. gathering data
• B. processing data into information
• C. analyzing the data or information
• D. storing the data or information

Explanation: The standard functions are gathering or inputting data, processing it, producing information, and storing it. Analysis may be performed during processing, but it is not normally listed as one of the four basic functions.

237. The task of performing operations like arithmetic and logical operations is called____________?

• A. Processing
• B. Storing
• C. Editing
• D. Sorting

Explanation: Arithmetic and logical operations transform or evaluate data, so they are part of processing. Storing, editing, and sorting describe other specific activities rather than the general operation named here.

238. _______________is the ability of a device to "jump" directly to the requested data?

• A. Sequential access
• B. Random access
• C. Quick access
• D. All of the above

Explanation: Random access allows a device to go directly to a requested location instead of reading all preceding data. Sequential access must proceed in order, and quick access is not the standard technical term.

239. You use a(n)___________such as a keyboard or mouse, to input information?

• A. output device
• B. input device
• C. storage device
• D. processing device

Explanation: A keyboard or mouse sends data and commands into the computer, so each is an input device. Output devices send processed results from the computer to the user.

240. On-line real time systems become popular in______________generation?

• A. First Generation
• B. Second Generation
• C. Third Generation
• D. Fourth Generation

Explanation: Third-generation computers, based mainly on integrated circuits, supported the wider adoption of online real-time processing systems. Earlier generations were more commonly associated with batch processing.