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21. What does GUI stand for?
A. Graphical User Instruction
B. Ground User Interface
C. General User Instruction
D. Graphical User Interface
ANSWER:D
SOLUTION:A graphical user interface, or GUI, is a form of user interface that allows users to interact with electronic devices through graphical icons and visual indicators.
22. ____ is standard output device.
A. Keyboard
B. Monitor
C. Printer
D. Scanner
ANSWER: B
SOLUTION:The monitor is the standard output device for a computer. It displays text, images, and user interface elements by lighting up thousands of pixels with different colors.
23. The mouse is developed in the year ____
A. 1956
B. 1964
C. 1972
D. 1990
ANSWER:B
SOLUTION:1964
24. The wheel located between the two standard buttons on a mouse is used to ________.
A. Click on web pages
B. Click and select item
C. Scroll
D. Storing devices
ANSWER:C
SOLUTION:The scroll wheel is used to scroll through text or images, such as documents or web pages, by rotating the wheel forward or backward.
25. Using output devices one can ____
A. Input data
B. Store data
C. Scan data
D. View or print data
ANSWER: D
SOLUTION:Using output devices, one can view or print data. An output device is a piece of computer hardware that converts information into a human-readable format.
26. Which of the following is not an example of hardware?
A. Keyboard
B. Scanner
C. Compiler
D. Monitor
ANSWER: B
SOLUTION:A scanner is not an example of hardware. Hardware is the physical parts of a computer, such as the keyboard, monitor, mouse, and processing unit.
27. Which of the following is not an output device?
A. Plotter
B. Printer
C. Scanner
D. Monitor
ANSWER: C
SOLUTION:A scanner is not an output device, but an input device that converts images from sources like posters, magazine pages, and photographic prints into digital files for computer editing and display.
28. Who invented keyboard ?
A. James Gosling
B. Steve Jobs
C. Martin cooper
D. Christoper Latham Sholes
ANSWER:D
SOLUTION:Christopher Latham Sholes (1819-1890) invented the QWERTY keyboard and introduced the keyboard layout that’s used today.
29. A series of instructions that tells a computer what to do and how to do it is called a ____.
A. Program
B. Command
C. User response
D. Processor
ANSWER: A
SOLUTION:A series of instructions that tells a computer what to do and how to do it is called a program, or software program.