NTA UGC NET/JRF Exam, June-2019 (Electronic Science)Total Questions: 10021. The figure of merit of a logic family is given by the product of:A. gain and bandwidthB. propagation delay time and power dissipationC. fan out and propagation delayD. noise margin and power dissipationCorrect Answer: B. propagation delay time and power dissipation22. Which of the following statements is not correct about a universal shift register?A. Universal shift register is a bidirectional register whose inputs can be either in serial form or in parallel formB. Universal shift register generates internal clock to synchronize the operationsC. We need 'N' number of D flipflops and 'N' number of MUX to design N-bit universal shift registerD. Universal shift register has a clear control that clears the contents of register to 0Correct Answer: B. Universal shift register generates internal clock to synchronize the operations23. The correct combination of characteristic equation Qₙ₊₁ Of S-R flipflop and J-K flipflop respectively is:A.B.C.D.Correct Answer: D.24. Which one of the following is equivalent to the Boolean expression Y = AB + BC + CA?A.B.C.D.Correct Answer: B.25. The number of directed arcs terminating on any state of a state diagram is:A. 2ⁿ where n is the number of inputsB. 2ⁿ where n is the number of flipflops in the circuitC. independent of the number of inputsD. dependent on the number of outputsCorrect Answer: C. independent of the number of inputs26. Contents of which memory location is transferred to register AL after execution of the following 8086 program?MOV CX, 2050H MOV DS, CX MOV AL, [F025]A. OF025B. F0250C. 2F525D. 20500Correct Answer: C. 2F52527. Which of the following is 16-bit register of 8051 microcontroller?A. DPLB. SBUFD. TCONE. (*)Correct Answer: E. (*)28. Which is invalid 8051 microcontroller instruction?A. MOVX @DPTR, AB. RA AC. MOV DPTR,# 2500D. DA ВE. (B) & (D)Correct Answer: E. (B) & (D)29. If 8051 microcontroller is rated at 25 MHz, what is the maximum frequency that can be connected to it?A. 12.5 MHzB. 25 MHzС. 50 МHzD. 30 MHzCorrect Answer: B. 25 MHz30. Which bit address is assigned to PCON register?A. B8HB. 78HC. 80HD. 87HCorrect Answer: D. 87HSubmit Quiz« Previous12345678910Next »
