21. Which function positive logic is equivalent to OR function in negative logic?

A. NOT
B. AND
C. OR
D. NOR
E. None of the above

22. Conversion of binary number 101101₂ to its decimal number is

A. 45₁₀
B. 43₁₀
C. 40₁₀
D. 47₁₀
E. None of the above

23. FETs are used in linear ICs to:

A. increase input resistance
B. provide large resistances
C. increase device complexity
D. (a) and (b) above
E. None of the above

24. A flip-flop can store

A. one bit of data
B. two bits of data
C. three bits of data
D. any number of bits of data
E. None of the above

25. Which of the following is the first integrated logic family?

A. RTL
B. DTL
C. TTL
D. MOS
E. None of the above