NTA UGC NET/JRF Exam, December-2019 (Electronic Science)

Total Questions: 100

21. Solve the following Boolean expression


Select the correct option:

Correct Answer: A. 0

22. A PROM can be made using:

Correct Answer: A. A fixed AND array and programmable OR array

23. A divide by 50 counter can be realized by using:

Correct Answer: C. One MOD-5 counter followed by one MOD-10 counter

24. The figure of merit (FOM) of a logic family is given by the product of:

Correct Answer: B. Propagation delay and power dissipation

25. Find the function represented by the following circuit:

Correct Answer: B. AB

26. In 8086 microprocessor, if DS = 1100 H, ВХ = 0200 H and SI = 0500 H, the address accessed by

MOV CH, [BX + SI] is:

Correct Answer: В. 11700 H

27. What is the value of Register A at the end of program given below

MOV A, # 36 H
RRA
RRA
RRA

Correct Answer: В. 1100 0110

28. What will be the status of CY, AC and P flags after implementation of following sets of instruction in 8051 microcontroller:

MOV A, # CCH
ADD A, # A9H

Correct Answer: C. CY = 1, AC = 1, P = 1

29. In 8051 microcontroller, which register is used solely for serial communication?

Correct Answer: C. SBUF

30. Which Register Bank of 8051 microcontroller is used after implementing the following instruction

SETB PSW.4

Correct Answer: D. Bank 2