MCQOPTIONS
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MCQOPTIONS
This section includes 9294 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 3701. |
How many lines are there in address bus of 8085 p? |
| A. | 6 |
| B. | 8 |
| C. | 12 |
| D. | 16 |
| Answer» E. | |
| 3702. |
In floating point representation, the accuracy is |
| A. | 10 bit |
| B. | 9 bit |
| C. | 8 bit |
| D. | 6 bit |
| Answer» C. 8 bit | |
| 3703. |
Which of the following logic family is fastest of all? |
| A. | TTL |
| B. | RTL |
| C. | DCTL |
| D. | ECL |
| Answer» E. | |
| 3704. |
A 4 bit binary adder has 4 full adders. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3705. |
The PC contains 0450 H and SP contains 08D 6 H. What will be content of P and SP following a CALL to subroutine at location 02 AFH? |
| A. | 0453 H, 08 D 8 H |
| B. | 0453 H, 08 D 4 H |
| C. | 02 AFH, 08 D 8 H |
| D. | 02 AFH, 08 D 4 H |
| Answer» E. | |
| 3706. |
High speed counter |
| A. | ring counter |
| B. | ripple counter |
| C. | synchronous counter |
| D. | asynchronous counter |
| Answer» D. asynchronous counter | |
| 3707. |
Registers and counters are similar in the sense that they both |
| A. | count pulses |
| B. | store binary information |
| C. | are made from an array of flip-flops and gates integrated on a single chip |
| D. | are shift registers |
| Answer» D. are shift registers | |
| 3708. |
2's complement representation of a 16 bit number (one sign bit and 15 magnitude bit) is FFFF. Its magnitude in decimal representation is |
| A. | 0 |
| B. | 1 |
| C. | 32676 |
| D. | 65, 535 |
| Answer» C. 32676 | |
| 3709. |
A 4 line to 16 line decoder has |
| A. | 16 inputs and 4 outputs |
| B. | 4 inputs and 16 outputs |
| C. | either (a) or (b) |
| D. | neither (a) nor (b) |
| Answer» C. either (a) or (b) | |
| 3710. |
Which one of the following is the correct sequence of the numbers represented in the series given below? |
| A. | 2, 3, 4, 5, 6...... |
| B. | 2, 4, 6, 8, 10 ..... |
| C. | 2, 4, 6, 10, 12...... |
| D. | 2, 4, 6, 10, 16 ..... |
| Answer» E. | |
| 3711. |
Monostable multivibrator is called one-shot or single-shot circuit because it |
| A. | can be used once |
| B. | can be used single and not with other circuits. |
| C. | always returns by itself to its single stable state |
| D. | changes to quasistable for a fixed period of time upon receipt of triggering signal. |
| Answer» D. changes to quasistable for a fixed period of time upon receipt of triggering signal. | |
| 3712. |
The hexadecimal number 64 AC is equivalent to decimal number |
| A. | 25727 |
| B. | 25722 |
| C. | 25772 |
| D. | 25777 |
| Answer» D. 25777 | |
| 3713. |
The subtraction of a binary number Y from another binary number X, done by adding the 2's complement of Y to X results in a binary number without overflow. This implies that the result is |
| A. | -ve and is in normal form |
| B. | -ve and 2's complement form |
| C. | +ve and is in normal form |
| D. | +ve and in 2's complement |
| Answer» E. | |
| 3714. |
The decimal equivalent of the binary number 10110.0101011101 is |
| A. | 22.2408216500 |
| B. | 22.3408216750 |
| C. | 22.3408213125 |
| D. | 22.3408203125 |
| Answer» E. | |
| 3715. |
The decimal equivalent of ABC16 is |
| A. | 348 |
| B. | 2583 |
| C. | 2748 |
| D. | 33 |
| Answer» D. 33 | |
| 3716. |
In parallel in-parallel out shift register all bits are loaded and read simultaneously. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3717. |
One XOR gate can work as |
| A. | one bit magnitude comparator |
| B. | two bit magnitude comparator |
| C. | either (a) or (b) |
| D. | neither (a) nor (b) |
| Answer» B. two bit magnitude comparator | |
| 3718. |
In an R-S latch, race condition occurs when |
| A. | R is low and S is high |
| B. | R and S are high |
| C. | R and S are low |
| D. | R is high and S is low |
| Answer» C. R and S are low | |
| 3719. |
Assertion (A): CMOS devices have very low power consumption Reason (R): CMOS devices have high noise margin. |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is true, R is false |
| D. | A is false, R is true |
| Answer» C. A is true, R is false | |
| 3720. |
Which is known as flash converter? |
| A. | Weighted resistor D/A converter |
| B. | Parallel A/D converter |
| C. | Stair step A/D converter |
| D. | Up-down counter type A/D converter |
| Answer» C. Stair step A/D converter | |
| 3721. |
Point out the wrong statement, Sequential logic circuit is |
| A. | one that requires a clock to change states |
| B. | one in which past affects the present states |
| C. | one whose outputs changes immediately when the inputs change |
| D. | also called clock logic or synchronous logic |
| Answer» D. also called clock logic or synchronous logic | |
| 3722. |
In 8085 microprocessor, what is the memory address stored on the stack, when the program is interrupted? |
| A. | 0210 H |
| B. | 0.211 H |
| C. | 0118 H |
| D. | 020 FH |
| Answer» C. 0118 H | |
| 3723. |
Two numbers in excess-3 code are added and the result is less than 8. To get equivalent binary |
| A. | 0011 is subtracted |
| B. | 0011 is added |
| C. | 0110 is subtracted |
| D. | 0110 is added |
| Answer» D. 0110 is added | |
| 3724. |
SSI is used in flip flops. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3725. |
The inputs to a 4 channel MUX have the following bandwidths. Channel 1-50 Hz, channel 2-200 Hz. Channel 3-75 Hz. Channel 4-90 Hz. The theoretical minimum sampling rate of the MUX is |
| A. | 200 Hz |
| B. | 400 Hz |
| C. | 415 Hz |
| D. | 1600 Hz |
| Answer» E. | |
| 3726. |
Flow charts that contain decision symbol |
| A. | represent straight line programs |
| B. | do not represent straight line programs |
| C. | all of the above |
| D. | none of the above |
| Answer» C. all of the above | |
| 3727. |
In 8085 microprocessor, what is the length of Data Buffer Register? |
| A. | 6 bits |
| B. | 8 bits |
| C. | 12 bits |
| D. | 16 bits |
| Answer» C. 12 bits | |
| 3728. |
In JK flip flop toggle state exists if |
| A. | J = 0, K = 1 |
| B. | J = 1, K = 0 |
| C. | J = 0, K = 0 |
| D. | J = 1, K = 1 |
| Answer» E. | |
| 3729. |
Thu advantage of using a dual stop ADC in a digital voltmeter is that |
| A. | its conversion time is small |
| B. | its accuracy high |
| C. | output is in BCD format |
| D. | it does not require a comparator |
| Answer» C. output is in BCD format | |
| 3730. |
The binary number 101100.110 in octal number will be |
| A. | 152.6 |
| B. | 154.6 |
| C. | 145.6 |
| D. | 174.6 |
| Answer» C. 145.6 | |
| 3731. |
The circuit given below is a |
| A. | counter |
| B. | digital to analog converter |
| C. | two-bit series-to-parallel converter |
| D. | analog-to digital converter |
| Answer» D. analog-to digital converter | |
| 3732. |
A universal shift register can shift left or right. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3733. |
Which converters uses integrating op-amp? |
| A. | Parallel A/D converter |
| B. | Single slope A/D converter |
| C. | Dual slope A/D converter |
| D. | Both (b) and (c) |
| Answer» D. Both (b) and (c) | |
| 3734. |
The recently-introduces CD-ROM PC by Head Start Technologies Co. of New York enables users to view or play __________ . |
| A. | vast amounts of text |
| B. | graphics |
| C. | music |
| D. | all of the above |
| Answer» E. | |
| 3735. |
In 8085 microprocessor, what is the length of A-register? |
| A. | 6 bits |
| B. | 8 bits |
| C. | 12 bits |
| D. | 16 bits |
| Answer» C. 12 bits | |
| 3736. |
How is inversion achieved using EX-OR gate? |
| A. | Giving input signal to the two input lines of the gate tied together |
| B. | Giving input to one input line and logic one to the other line |
| C. | Giving input to one input line and logic one to the other line |
| D. | Inversion cannot be achieved using EX-OR gate |
| Answer» D. Inversion cannot be achieved using EX-OR gate | |
| 3737. |
The difference between sequential and combinational circuits is |
| A. | Combinational circuits store bits |
| B. | Combinational circuits have memory |
| C. | Sequential circuits store bits |
| D. | Sequential circuits have memory |
| Answer» E. | |
| 3738. |
For the DAC in the given figure VO= |
| A. | 10 V |
| B. | 5 V |
| C. | 4 V |
| D. | 8 V |
| Answer» B. 5 V | |
| 3739. |
TTL uses |
| A. | multi-emitter transistors |
| B. | multi-collector transistors |
| C. | multi-base transistors |
| D. | multi-emitter or multi-collector transistors |
| Answer» B. multi-collector transistors | |
| 3740. |
In which function is each term known as minterm? |
| A. | SOP |
| B. | POS |
| C. | Hybrid |
| D. | Both SOP and POS |
| Answer» B. POS | |
| 3741. |
How many and what are the machine cycles needed for execution of MOV D, C? |
| A. | 1, Fetch |
| B. | 2, Fetch and Memory Read |
| C. | 2, Memory Read and Memory write |
| D. | 2, Fetch 4 Bus idle |
| Answer» B. 2, Fetch and Memory Read | |
| 3742. |
The output data lines of microprocessor and memories are usually tristated because |
| A. | more than one device can transmit information over the data bus by enabling only one device at a time |
| B. | more than one device can transmit information over the data bus at the same time |
| C. | the data lines can be multiplexed for both I/P and O/P |
| D. | it increases the speed of data transfers over the data bus |
| Answer» B. more than one device can transmit information over the data bus at the same time | |
| 3743. |
In the NMOS inverter |
| A. | the driver and active load are enhancement type |
| B. | driver is enhancement type and load depletion type |
| C. | driver is depletion type and load enhancement type |
| D. | both driver and load are depletion type |
| Answer» C. driver is depletion type and load enhancement type | |
| 3744. |
A counter displays a sequence of numbers. If a reading corresponds to the hexadecimal number F52E, the next two readings are respectively |
| A. | F52F, F520 |
| B. | F530, F531 |
| C. | F52F, F530 |
| D. | F52F, F52G |
| Answer» D. F52F, F52G | |
| 3745. |
Effective address is calculated by adding or subtracting displacement value to |
| A. | immediate address |
| B. | Relative address |
| C. | absolute address |
| D. | base address |
| Answer» E. | |
| 3746. |
Typical switching time for ECL is |
| A. | 5 nano seconds |
| B. | 5 micro seconds |
| C. | 5 milli seconds |
| D. | 5 seconds |
| Answer» B. 5 micro seconds | |
| 3747. |
The decimal equivalent of the hexadecimal number E 5 is |
| A. | 279 |
| B. | 229 |
| C. | 327 |
| D. | 0 |
| Answer» C. 327 | |
| 3748. |
The parity bit is |
| A. | always 1 |
| B. | always 0 |
| C. | 1 or 0 |
| D. | none of the above |
| Answer» D. none of the above | |
| 3749. |
In 2's complement representation, a certain negative number - N is 1011. The representation for + N is |
| A. | 0100 |
| B. | 0101 |
| C. | 0110 |
| D. | 0011 |
| Answer» C. 0110 | |
| 3750. |
What binary number does second row represent? |
| A. | 01111001 |
| B. | 01010101 |
| C. | 10101010 |
| D. | 11101010 |
| Answer» E. | |