The terminal device that functions as a cash register, computer terminal, and OCR reader is the:
Answer: D
Correct answer: POS terminal
A point-of-sale terminal is the checkout till: it takes payment like a cash register, is connected to the store’s computer as a terminal, and reads bar codes or characters optically. Combining all three is exactly what distinguishes it.
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How many address lines are needed to address each machine location in a 2048 x 4 memory chip?
Answer: B
Correct answer: 11
The number of addressable locations is 2048, so the address lines must satisfy
\[ 2^{n} \ge 2048 = 2^{11} \]giving 11 lines. The “× 4” describes the width of each location, four bits, and has no effect on how many address lines are needed.
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Algorithm and Flow chart help us to
Answer: D
Correct answer: Specify the problem completely and clearly
An algorithm sets out the steps of a solution in order, and a flowchart shows the same thing diagrammatically. Both exist to make the logic explicit before any code is written - which is where ambiguities and missing cases come to light. Neither has anything to say about memory, number bases or printers.
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