Computer Fundamental Miscellaneous - Study Mode
[#721] The terminal device often used in checking charge cards that offers both a limited keyboard input and visual output is the:
Correct Answer
(C) Video display terminal
Explanation
Solution: The terminal device often used in checking charge cards that offers both a limited keyboard input and visual output is the Video display terminal. VDT (video display terminal or sometimes visual display terminal) is a term used, especially in ergonomic studies, for the computer display.
[#722] The computer translates the condition of each switch to a number. What number is represented by the OFF state?
Correct Answer
(D) 0
Explanation
Solution: It has no value because it's “off”. Therefore, it is a 0 digit. Conversely, if the state is “on”, then it has value. We can represent it as a 1 digit. Binary code, code used in digital computers, based on a binary number system in which there are only two possible states, off and on, usually symbolized by 0 and 1.
[#723] Who built the world's first electronic calculator using telephone relays, light bulbs and batteries?
Correct Answer
(C) George Stibitz
Explanation
Solution: George Stibitz made the original version of this in 1936 on his kitchen table, hence the name “Model K”. Using scrapped relays from Bell Labs and strips of metal from a tin can, it can add two binary digits. In November 1937, George Stibitz, then working at Bell Labs (1930 - 1941), completed a relay-based calculator he later dubbed the “Model K” (for “kitchen table”, on which he had assembled it), which calculated using binary addition.
[#724] Hard disks and diskettes are:
Correct Answer
(A) Direct access storage devices
Explanation
Solution: Common direct access storage devices include solid-state drives (SSDs) and hard disk drives (HDDs). Direct access storage devices include RAID arrays like the one pictured here, hard disk drives, solid state drives, and systems like magnetic drums and data cells, optical discs and PC storage devices.
[#725] In digital data transmission
Correct Answer
(A) Baud rate in equal to bit rate
Explanation
Solution: In digital data transmission, two important terms are used to describe the transmission speed — bit rate and baud rate . Bit Rate: It is the number of bits transmitted per second. For example, if 1000 bits are sent every second, the bit rate is 1000 bps (bits per second). Baud Rate: It is the number of signal units (also called symbols) transmitted per second. A symbol may represent one or more bits depending on the modulation technique used. When each symbol represents exactly one bit (as is common in basic transmission systems), then: Baud Rate = Bit Rate If more complex encoding techniques are used, where each symbol can represent multiple bits (e.g., 2, 4, or more), then: Bit Rate = Baud Rate × Number of bits per symbol But the question refers generally to digital data transmission without such specific encoding. So, in most simple digital transmission cases, baud rate equals bit rate. Hence, the correct answer is Option A.