The barcode which is used on all types of items, is read by a scanning device directly into the computer. What is the name of this scanning device?

A Laser scanner
B Wand
C OCR
D MICR
E None of the above

Correct Answer: Laser scanner

A barcode scanner, also called a point-of-sale (POS) scanner or a price scanner, is a device used to capture and read information contained in a barcode. The scanner consists of a light source, a lens and a light sensor that translates optical impulses into electrical ones.
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A barcode reader emits ---
A Sounds
B Commands
C Lights
D Magnetic field
Consider a company that assembles computers. The probability of a faulty assembly of any computer is p. The company therefore subjects each computer to a testing process. This testing process gives the correct result for any computer with a probability of q. What is the probability of a computer being declared faulty?
A pq + (1 - p) (1 - q)
B (1 - q)p
C (1 - p)q
D pq
A special lottery is to be held to select the student who will live in the only deluxe room in a dormitory . There are 100 seniors, 150 juniors and 200 sophomres who applied. Each senior's junior's name , 2 times; and each sophomres who applied. Each senior's name is placed in the lottery 3 times; each junior's name ,2 times name, 2 times ; and each sphomore's name , 1 time . What is the probability that a senior's name will be chosen?
A 18
B 38
C 48 
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Character readers are those devices which read the characters printed on the source documents and then convert them directly into computer-usable input. Which of the following is not a character reader?
A OCR
B MICR
C OMR
D LCD
E None of the above
Which topology does not allow transferring data directly from computer to computer ?
A Ring
B Bus
C Tree
D Star
50% of the people in an area read Ittefaq and 60% of the people in that area read Prothom Alo. 20% people read both the newspapers. What percent of people do not read any of the newspapers ?
A 20
B 10
C 15
D 25
Which of the following property aligns the flexible container’s items when the items do not use all available space on the main-axis?
A wrap-content
B fix-content
C adjust-content
D justify-content
Of the total amount that Jill spent on a shopping trip, excluding taxes, she spent 50% on clothing 20% on food, and 30% on other items. If Jill paids 4% tax on clothing , on tax on the food, and an 8% tax on all other items, then the total tax that she paid was what percent of the total amount that she spent, excluding taxes?
A 3.6%
B 4.4%
C 5.2%
D None of these
The value of a computer is depreciated over five years for tax purposes (meaning that at the end of five years , the computer is worth $0). If a business paid $ 2,100 for a computer, how much will it have depreciated after 2 years?
A $840
B $ 1,050
C $ 820
D $ 420
You create home directories for users Jan and Kim on a Windows NT Server computer. Jan works on a Windows NT Workstation computer. Kim works on a Microsoft Windows for Workgroups computer. After they log on, Jan can access her home directory, but Kim cannot access her home directory. What should you do?
A Start the Replication service on Kim's Windows for Workgroups computer
B Relocate Kim's home directory to her Windows for Workgroups computer
C Map a drive on Kim's Windows for Workgroups computer to her home directory on the server
D You cannot do this. Home directories can be accessed only by Windows NT computers

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