Solapur University MCA (Semester-I) Paper on Digital Circuits and Microprocessors March 2019
| Sr. No. | Question |
| 1 | In which of the following gates, the output is 1, if and only if at least one input is 1?
(a) NOT (b) AND (c) OR (d) NAND |
| 2 | Which table shows the logical state of a digital circuit output for every possible combination of logical states in the inputs?
(a) Function table (b) Truth table (c) Routing table (d) ASCII table |
| 3 | How many lines the truth table for a four-did not input NOR gate would contain to cover all possible input combinations?
(a) 4 (b) 8 (c) 12 (d) 16 |
| 4 | The function of a multiplexer is __________
(a) To decode information (b) To select 1 out of N input data sources and to transmit it to single channel (c) To transmit data on N lines (d) To perform serial to parallel conversion |
| 5 | Which is the correct sequential order of operational steps executed in the combinational logic circuits?
1. Operation of combinational gates over the inputs 2. Acceptance of n-different inputs 3. Generation of ‘m’ different outputs as per the required level (a) A,B,C (b) A,C,B (c) B,A,C (d) C,A,B |
| 6 | What does the below stated Boolean Law imply, while performing below stated operation of an input with ‘0’?
Expression of Law : A.0 = 0 (a) Output will always be equal to input (b) Output will always be high (c) Output will always be low (d) Output will always be same |
| 7 | Which digital system translates coded characters into a more intelligible form?
(a) Encoder (b) Display (c) Decoder (d) Counter |
| 8 | The binary number 10101 is equivalent to decimal number _______
(a) 19 (b) 12 (c) 27 (d) 21 |
| 9 | The output of a half adder is _________
(a) Sum (b) Sum and Carry (c) Carry (d) None of these |
| 10 | 1’s complement of 00011001 is _______
(a) 11100110 (b) 00011001 (c) 11001111 (d) 00110110 |
| 11 | In 8085 microprocessor, RD pin this is used for _______operation. It is an output signal. It is active when low.
(a) Ready (b) Remove directory (c) Reset (d) Read |
| 12 | _________is an edge triggered input which results in a type II interrupt.
(a) New maskable interrupt (b) Non maskable interpole (c) Non maskable interrupt (d) New maskable interjector |
| 13 | The ALE signal, when the pulse goes high, it indicates address. When the pulse goes down it indicates _______
(a) Data (b) Read (c) Write (d) Fetch |
| 14 | The MOV instruction copies the contents of the source register into the _______ register without any alteration.
(a) Data (b) Segment (c) Offset (d) Destination |
| Published on 6th Oct 2021 | |
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