MCQOPTIONS
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MCQOPTIONS
This section includes 2171 Mcqs, each offering curated multiple-choice questions to sharpen your ENGINEERING SERVICES EXAMINATION (ESE) knowledge and support exam preparation. Choose a topic below to get started.
| 701. |
The output impedance of a logic pulser is |
| A. | low |
| B. | high |
| C. | may be Low or High |
| D. | can't say |
| Answer» B. high | |
| 702. |
Some of MOS families are PMOS, NMOS, CMOS. The family dominating the LSI field where low power consumption is necessary is |
| A. | NMOS |
| B. | CMOS |
| C. | PMOS |
| D. | both NMOS and CMOS |
| Answer» C. PMOS | |
| 703. |
Karnaugh map is used to |
| A. | minimise the number of flip flops in a digital circuit |
| B. | minimise the number of gates only in a digital circuit |
| C. | minimise the number of gates and fan in a digital circuit |
| D. | design gates |
| Answer» C. minimise the number of gates and fan in a digital circuit | |
| 704. |
Assertion (A): TTL uses multiple emitter transistor.Reason (R): Multiple emitter transistors with about 60 emitters have been developed. |
| 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 | |
| 705. |
Decimal 45.15 when converted into 9's complement will become |
| A. | 54.84 |
| B. | 45.48 |
| C. | 48.54 |
| D. | 45.84 |
| Answer» B. 45.48 | |
| 706. |
How many JK flip-flops are needed to make a 4-bit shift register? |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 707. |
A₁₆ X 2₁₆ __________ . |
| A. | 16₁₆ |
| B. | 15₁₆ |
| C. | 14₁₆ |
| D. | 13₁₆ |
| Answer» D. 13₁₆ | |
| 708. |
Assuming accumulator contain A 64 and the carry is set (1). What will register A and (CY) contain after ACI 0 A4 H? |
| A. | 4 AH, 0 |
| B. | 4 AH, 1 |
| C. | 4 BH, 0 |
| D. | 4 BH, 1 |
| Answer» E. | |
| 709. |
If A is 1011, A" is |
| A. | 1011 |
| B. | 0100 |
| C. | 1100 |
| D. | 1010 |
| Answer» B. 0100 | |
| 710. |
A digital clock uses __________ chip |
| A. | SSI |
| B. | LSI |
| C. | VLSI |
| D. | MSI |
| Answer» C. VLSI | |
| 711. |
Decimal number 46 in excess 3 code = |
| A. | 1000 1001 |
| B. | 0111 1001 |
| C. | 0111 1111 |
| D. | 1000 1111 |
| Answer» C. 0111 1111 | |
| 712. |
11011 in gray code = __________ . |
| A. | 10010₂ |
| B. | 11111₂ |
| C. | 11100₂ |
| D. | 100012₂ |
| Answer» B. 11111₂ | |
| 713. |
As compared to MOS memories, bipolar memories have |
| A. | slower access time but are cheaper |
| B. | slower access time and are costly |
| C. | faster access time and are cheaper |
| D. | faster access time and are costly |
| Answer» E. | |
| 714. |
RS latch can be built with |
| A. | NOR gates |
| B. | NAND gates |
| C. | NOR or NAND gates |
| D. | none of the above |
| Answer» D. none of the above | |
| 715. |
A + A . B = |
| A. | B |
| B. | A . B |
| C. | A |
| D. | A or B |
| Answer» D. A or B | |
| 716. |
A XOR gate has inputs A and B and output Y. Then the output equation is |
| A. | Y = AB |
| B. | Y = AB + A̅ B |
| C. | Y = A̅ B + A B̅ |
| D. | Y = A B + A̅ B̅ |
| Answer» D. Y = A B + A̅ B̅ | |
| 717. |
Assertion (A): The output of a NOR gate is equal to the complement of OR of input variables. Reason (R): A XOR gate is a universal gate. |
| 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» D. A is false, R is true | |
| 718. |
In 8085, usually the vector location and the next two memory location contain a JMP instruction. This allows the programs to branch to |
| A. | a longer subroutine |
| B. | a shorter subroutine |
| C. | a subroutine free path |
| D. | none of the above |
| Answer» B. a shorter subroutine | |
| 719. |
In 8085 microprocessor, which of the following is not vectored interrupt? |
| A. | RST 5.5 |
| B. | RST 6.5 |
| C. | RST 7.5 |
| D. | INTR |
| Answer» E. | |
| 720. |
How many different BCD number can be stored in a register containing 12 switches using an 8, 4, 2, 1 code? |
| A. | 99 |
| B. | 100 |
| C. | 999 |
| D. | 1000 |
| Answer» E. | |
| 721. |
The first machine cycle of an instruction is always |
| A. | a memory read cycle |
| B. | a fetch cycle |
| C. | a input/output read cycle |
| D. | a memory write cycle |
| Answer» C. a input/output read cycle | |
| 722. |
In 8085 microprocessor, in order to enable RST 5.5, RST 6.5 and RST 7.5 interrupts, which of the following instruction are needed? |
| A. | EI only |
| B. | SIM only |
| C. | EI and SIM both |
| D. | None |
| Answer» D. None | |
| 723. |
Assertion (A): A high density IC has more diodes, transistors and resistors per unit surface area.Reason (R): A high density IC can handle high voltages. |
| 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» D. A is false, R is true | |
| 724. |
The number of bits in EBCDIC is |
| A. | 12 |
| B. | 10 |
| C. | 8 |
| D. | 6 |
| Answer» D. 6 | |
| 725. |
With on-chip decoding, n address lines can access |
| A. | 2n memory locations |
| B. | 2n² memory locations |
| C. | 2ⁿ memory locations |
| D. | n² memory location |
| Answer» D. n² memory location | |
| 726. |
A 4 bit ripple counter uses flip flops with propagation delay of 50 ns each. The maximum clock frequency which can be used is |
| A. | 5 MHz |
| B. | 10 MHz |
| C. | 20 MHz |
| D. | 25 MHz |
| Answer» B. 10 MHz | |
| 727. |
Three Mod-16 counters are connected in cascade. The maximum counting range is |
| A. | 16 |
| B. | 256 |
| C. | 4096 |
| D. | none of the above |
| Answer» D. none of the above | |
| 728. |
Binary 1111 when subtracted from binary 11111 is |
| A. | 101110 |
| B. | 10110 |
| C. | 10000 |
| D. | 100010 |
| Answer» B. 10110 | |
| 729. |
Assertion (A): Even if TTL gates and CMOS gates used in a realization have the same power supply of + 5 V, suitable circuit is needed to interconnect themReason (R): VOH, VOL, VIH and VIL of a TTL gave are respectively 2.4, 0.4, 2 and 0.8 V respectively. If supply voltage is + 5 V. VIL and VIH for CMOS gate for the supply voltage of + 5 V are 1.5 V and 3.5 V respectively. |
| 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» B. Both A and R are correct but R is not correct explanation of A | |
| 730. |
A clock signal driving a 6-bit ring counter has a frequency of 1 MHz. How long is each timing bit high? |
| A. | 1 ms |
| B. | 2 ms |
| C. | 3 ms |
| D. | 6 ms |
| Answer» B. 2 ms | |
| 731. |
A universal register |
| A. | accepts serial input |
| B. | accepts Parallel input |
| C. | gives serial and Parallel output |
| D. | all of the above |
| Answer» E. | |
| 732. |
RAM can be expanded to |
| A. | increase word size |
| B. | increase word number |
| C. | either increase word size or increase word number |
| D. | none of the above |
| Answer» D. none of the above | |
| 733. |
What is the maximum output voltage from the 741 op-amp? |
| A. | Zero |
| B. | Approximately 1 V |
| C. | Approximately 3 V |
| D. | Approximately 5 V |
| Answer» E. | |
| 734. |
A 7477 decoder drives |
| A. | seven-segment display |
| B. | nickel tape |
| C. | relays |
| D. | diode matrix |
| Answer» B. nickel tape | |
| 735. |
A quantization error is an essential aspect of ADC |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 736. |
Dynamic memory cells are constructed using |
| A. | FETs |
| B. | MOSFETs |
| C. | Transistors |
| D. | Flip flops |
| Answer» C. Transistors | |
| 737. |
Assertion (A): A binary number is a string of zeros and ones only Reason (R): The base in a binary system is 2 |
| 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» B. Both A and R are correct but R is not correct explanation of A | |
| 738. |
Which device has one input and many outputs? |
| A. | Multiplexer |
| B. | Demultiplexer |
| C. | Counter |
| D. | Flip flop |
| Answer» C. Counter | |
| 739. |
RAMs can be built with bipolar or CMOS transistor RAMs that are not possible with bipolar transistors are |
| A. | SRAM |
| B. | SRAM, DRAM |
| C. | DRAM |
| D. | PROM |
| Answer» D. PROM | |
| 740. |
Subroutines are used in larger programs not |
| A. | to increase the programming case |
| B. | to reduce storage equipment |
| C. | to reduce program extension time |
| D. | for ease of program testing at the program development time |
| Answer» E. | |
| 741. |
1011₂ x 101₂ = __________ ₁₀ |
| A. | 55 |
| B. | 45 |
| C. | 35 |
| D. | 25 |
| Answer» B. 45 | |
| 742. |
A + (B . C) = |
| A. | A . B + C |
| B. | A . B + A . C |
| C. | A |
| D. | (A + B) . (A + C) |
| Answer» E. | |
| 743. |
Bipolar IC memories are fabricated using |
| A. | high density versions of MOSFET or low density versions of bipolar transistor flip-flop. |
| B. | high density version of MOSFET or bipolar transistor flip-flop |
| C. | low density versions of MOSFETs |
| D. | high density versions of the bipolar transistor flip-flop. |
| Answer» E. | |
| 744. |
The 2732 is 4096 x 8 EPROM. How many address lines does it have? |
| A. | 12 |
| B. | 24 |
| C. | 50 |
| D. | 100 |
| Answer» B. 24 | |
| 745. |
The simplified logic expression for the circuit of the given figure is |
| A. | Y = A |
| B. | Y = AB |
| C. | Y = A + B |
| D. | Y = A̅ + B |
| Answer» B. Y = AB | |
| 746. |
The minimum decimal equivalent of the number 11C0 is |
| A. | 183 |
| B. | 194 |
| C. | 268 |
| D. | 269 |
| Answer» E. | |
| 747. |
A memory system of size 16 k bytes is to be designed using memory chips which have 12 address lines and 4 data lines each. The number of such chips required to design the memory system is |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | 18 |
| Answer» D. 18 | |
| 748. |
A 4 bit ripple counter starts in 0000 state. When the counter reads 0010 the number of clock pulses which have occurred is |
| A. | 2 |
| B. | 18 |
| C. | 2 or 18 |
| D. | 2 or 18 or 34 |
| Answer» E. | |
| 749. |
In a 7 segment display the segments a, c, d, f, g are lit. The decimal number displayed will be |
| A. | 9 |
| B. | 5 |
| C. | 4 |
| D. | 2 |
| Answer» C. 4 | |
| 750. |
In DTL the junction transistor serves as |
| A. | inverter |
| B. | buffer amplifier |
| C. | both (a) and (b) |
| D. | none of the above |
| Answer» D. none of the above | |