571. The sign ++ in C++ represents?
A. Net level of C language with some additional features
B. C++ is for addition only
C. The trademark of C language
D. None of the above
572. In 1980’s which country created the most used networking software?
A. Novell
B. Cisco
C. IBM
D. Microsoft
573. @ was selected for its use in email address in what year?
A. 1972
B. 1976
C. 1980
D. 1884
574. Which one of the following is an American computer company?
A. IBM
B. Compaq corp
C. Microsoft
D. Dell
575. Who used punch cards to control patterns in a waving engine?
A. OHM
B. Hollerith
C. Babbage
D. Jacquard
576. What does SSL abbreviation stands for?
A. System socket layer
B. Secure system layer
C. Secure socket layer
D. Secure system layer
577. The term MAC stands for?
A. Memory address corruption
B. A computer made by apple
C. Mediocre apply computer
D. Media access control
578. What is the meaning of PPTP?
A. Point to point transmission protocol
B. Point to point traffic protocol
C. Point to point transfer protocol
D. Point to point Tunneling protocol
579. The IBM PC-xt was the first computer to come with a hard drive. How much space does the IBMCP-XT have?
A. 550 KB
B. 10 KB
C. 200 KB
D. 140 KB
580. Which person was the first who offered a definition of the term computer virus?
A. Smith
B. Cohen
C. Ohm
D. John
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