1). Piggy backing is a technique for a) Flow control b) sequence c) Acknowledgement d) retransmissionans: c piggy backing2). The layer in the OST model handles terminal emulationa) session b) application 

There is an employee table with key fields as employee no. Data in every n'th row are needed for a simple following queries will get required results. A. Select A employee no. from employee A, where exists from employee B, where A employee no. >= B employeee having (count(*) mod n)=0 B. select employee no. from employee A, employee B where A employee no. >= B employ no. grouping employee no. having (count(*) mod n=0) C. both a and b D. none of the above

Data: A causes B or C, but not both F occurs only if B occurs D occurs if B or C occurs E occurs only if C occurs J occurs only if E or F occurs D causes G, H or both H occurs if E occurs G occurs if F occurs NOTE: check following answers. If A occurs which of the following must occurs I. F & G II. E and H III. D A. I only B. II only C. III only D. I, II, and III E. I and II (or) II and III but not both

E  

Data: A causes B or C, but not both F occurs only if B occurs D occurs if B or C occurs E occurs only if C occurs J occurs only if E or F occurs D causes G, H or both H occurs if E occurs G occurs if F occurs NOTE: check following answers. If B occurs which must occur A. D B. D and G C. G and H D. F and G E. J

A  

Data: A causes B or C, but not both F occurs only if B occurs D occurs if B or C occurs E occurs only if C occurs J occurs only if E or F occurs D causes G, H or both H occurs if E occurs G occurs if F occurs NOTE: check following answers. If J occurs which must have occured A. E B. either B or C C. both E and F D. B (E. both B and C

B  

Data: A causes B or C, but not both F occurs only if B occurs D occurs if B or C occurs E occurs only if C occurs J occurs only if E or F occurs D causes G, H or both H occurs if E occurs G occurs if F occurs Which may occurs as a result of cause not mentioned (1) D (2) A (3) F A. 1 only B. 2 only C. 1 and 2 D. 2 and 3 E. 1,2,3

C  

Data: A causes B or C, but not both F occurs only if B occurs D occurs if B or C occurs E occurs only if C occurs J occurs only if E or F occurs D causes G, H or both H occurs if E occurs G occurs if F occurs E occurs which one cannot occurs A. A B. F C. D D. C E. J

B General: