A directory of Objective Type Questions covering all the Computer Science subjects. Here you can access and discuss Multiple choice questions and answers for various compitative exams and interviews.

 21. ECL is the fastest of all logic families. High Speed in ECL is possible because transistors are used in difference amplifier configuration, in which they are never driven into __________. a. Race condition b. Saturation c. Delay d. High impedance

 22. A binary 3-bit down counter uses J-K flip-flops, FFi with inputs Ji, Ki and outputs Qi, i=0,1,2 respectively. The minimized expression for the input from following, isI. J0=K0=0II. J0=K0=1III. J1=K1=Q0IV. J1=K1=Q'0V. J2=K2=Q1Q0Vl. J2=K2=Q'1Q'0 a. I, III, V b. I, IV, VI c. II, III, V d. II, IV, VI

 23. Convert the octal number 0.4051 into its equivalent decimal number. a. 0.5100098 b. 0.2096 c. 0.52 d. 0.4192

 24. The hexadecimal equivalent of the octal number 2357 is: a. 2EE b. 2FF c. 4EF d. 4FE

 25. If X is a binary number which is power of 2, then the value of X&(X-1) is: a. 11....11 b. 00.....00 c. 100.....0 d. 000.....1

 26. The Boolean function [~ (~p˄q)˄~(~p˄~q)]˅(p˄r) is equal to the Boolean function: a. q b. p˄r c. p˅q d. p

 27. The octal number 326.4 is equivalent to a. (214.2)10 and (D6.8)16 b. (212.5)10 and (D6.8)16 c. (214.5)10 and (D6.8)16 d. (214.5)10 and (D6.4)16