271. The file type #include is called
(A) syntax
(B) operator
(C) header file
(D) string constant

272. To generate different random numbers in C++, which of the following header file(s) must be included?
(A) #include <rand>
(B) #include <cstdlib>
(C) #include <ctime>
(D) #include <cstdlib> and #include <ctime>

273. Analog signal is measured in:
(A) Volt
(B) Hertz
(C) Digits
(D) WATTS

274. _________ uses liquid crystal between the glass plates.
(A) ELD
(B) LCD
(C) CRT
(D) None of These

275. Open System Interconnection(OSI) model consists of _________ layers.
(A) Eight
(B) Six
(C) Seven
(D) Five

276. Which of the following coding schemes uses 4-bit code?
(A) Unicode
(B) ASCII
(C) EBCDIC
(D) BCD

277. Which of the following communication medium requires “line-of-sight”?
(A) Microwave
(B) Fiber-Optic cable
(C) Twisted-Pair cable
(D) Coaxial cable

278. Which of the following standards were developed without any formal planning?
(A) De Facto
(B) De Jure
(C) ISO
(D) Both A and B

279. Which of the following is LAN protocol?
(A) Ethernet
(B) ARCnet
(C) Token Ring
(D) All

280. Which one is the Bottom-most layer of OSI model?
(A) Data link
(B) Physical
(C) Network
(D) Transport

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