MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In Von-Neumann-or Princeton-type computers, the program |
| A. | can appear any where within the memory |
| B. | memory and data memory are clearly distinguished |
| C. | data and instructions are distinguished at the first stage |
| D. | none of the above |
| Answer» B. memory and data memory are clearly distinguished | |
| 2. |
If A = 3 + j1, A4 = |
| A. | 3.16 18.4 |
| B. | 100 73.72 |
| C. | 100 18.4 |
| D. | 3.16 73.22 |
| Answer» C. 100 18.4 | |
| 3. |
In a two terminals network the O.C. voltage measured at the given terminals is 100 V and s.c., currents at the same terminals 5 A. If a load of 80 Ω resistance is connected at the terminals, load current is |
| A. | 1 A |
| B. | 1.25 A |
| C. | 6 A |
| D. | 6.25 A |
| Answer» B. 1.25 A | |
| 4. |
Colour code of carbon resistors has only two bands. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
A coil has resistance R and inductance L. At = the phase angle between voltage and current is |
| A. | 0 |
| B. | 180 |
| C. | 45 |
| D. | 90 |
| Answer» E. | |
| 6. |
Which of them radiates emission? |
| A. | LED only |
| B. | LCD only |
| C. | Both LED and LCD |
| D. | Neither LED nor LCD |
| Answer» B. LCD only | |
| 7. |
In 8085 microprocessor, a RIM instruction is used to |
| A. | disable the interrupts 7.5, 6.5, 5.5 |
| B. | enable the interrupts 7.5, 6.5, 5.5 |
| C. | read in the serial input data |
| D. | none of the above |
| Answer» D. none of the above | |
| 8. |
Which multivibrator can be used as a clock timer? |
| A. | Astable multivibrator |
| B. | Bistable multivibrator |
| C. | Any of the above |
| D. | None of the above |
| Answer» B. Bistable multivibrator | |
| 9. |
T-flip-flop is commonly used as |
| A. | a delay switch |
| B. | a digital counter only |
| C. | a digital counter and frequency divider |
| D. | any of the above |
| Answer» D. any of the above | |
| 10. |
For the switch circuit, taking open as 0 and closed as 1, the expression for the circuit is Y. Y is given by |
| A. | A + (B + C) D |
| B. | A + BC + D |
| C. | A(BC + D) |
| D. | none of these |
| Answer» D. none of these | |
| 11. |
Assuming accumulator contain A 64 and the carry is set (1).What will register A and (CY) contain after RAR? |
| A. | 4 DH, 0 |
| B. | D 3H, 0 |
| C. | 4 DH, 1 |
| D. | 53 H, 0 |
| Answer» C. 4 DH, 1 | |
| 12. |
In a synchronous counter all flip flops are clocked together. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
In a flip flop which input determines the state to which output will transistion? |
| A. | Control input |
| B. | Clock input |
| C. | Both control and clock input |
| D. | Either control or clock input |
| Answer» B. Clock input | |
| 14. |
As access time is decreased, the cost of memory |
| A. | remains the same |
| B. | increases |
| C. | decreases |
| D. | may increase or decrease |
| Answer» C. decreases | |
| 15. |
The rate of change of digital signals between High and Low level is |
| A. | very fast |
| B. | fast |
| C. | slow |
| D. | very slow |
| Answer» B. fast | |
| 16. |
In a positive-edge-triggered JK flip-flop, a low J and a low K produce __________ state. A high __________ on the rising edge of the clock. |
| A. | inactive, reset |
| B. | active, reset |
| C. | active, toggle |
| D. | inactive, toggle |
| Answer» E. | |
| 17. |
Assertion (A): Hamming code is commonly used for error correction Reason (R): In Hamming code the number of parity bits increases as the number of information bits increases. |
| 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 | |
| 18. |
Typical size of digital IC is about |
| A. | 1 x 1 |
| B. | 2 x 2 |
| C. | 0.1 x 0.1 |
| D. | 0.001 x 0.001 |
| Answer» D. 0.001 x 0.001 | |
| 19. |
System function , For a signal sin 2t, the steady state response is |
| A. | 1/8 |
| B. | |
| C. | 0 |
| D. | 8 |
| Answer» D. 8 | |
| 20. |
The resistance of a 230 V, 100 W lamp is |
| A. | 529 Ω |
| B. | 2300 Ω |
| C. | 5290 Ω |
| D. | 23 Ω |
| Answer» B. 2300 Ω | |
| 21. |
A decade counter |
| A. | counts for ten days |
| B. | counts ten times faster than a binary counters |
| C. | counts to 9 and reset on the next pulse |
| D. | reverts on the pulse after the tenth |
| Answer» D. reverts on the pulse after the tenth | |
| 22. |
The range of signed decimal number that can be represented by 6 bit in complement number is |
| A. | -31 to +31 |
| B. | -63 to +64 |
| C. | -64 to +63 |
| D. | -32 to +31 |
| Answer» B. -63 to +64 | |
| 23. |
Schottky clamping is resorted to in TTL gates |
| A. | to reduce propagation delay |
| B. | to increase noise margin |
| C. | to increase packing density |
| D. | to increase fan out |
| Answer» B. to increase noise margin | |
| 24. |
In 8085 microprocessor, which of the following interrupts has the highest priority? |
| A. | RST 5.5 |
| B. | RST 7.5 |
| C. | TRAP |
| D. | INTR |
| Answer» D. INTR | |
| 25. |
The circuit shown in the figure is a |
| A. | positive logic OR circuit |
| B. | negative logic OR circuit |
| C. | positive logic AND circuit |
| D. | negative logic AND circuit |
| Answer» B. negative logic OR circuit | |
| 26. |
What is the direction of control bus? |
| A. | Unidirection into p |
| B. | Unidirection out of up |
| C. | Bidirectional |
| D. | Mixed direction i.e., some lines into p and some other out of p |
| Answer» E. | |
| 27. |
If Vin is 0.99 V, what is the digital output of the ADC 0801 after INTER goes low? |
| A. | 0011 0011 |
| B. | 0101 1111 |
| C. | 0111 1100 |
| D. | 1111 1111 |
| Answer» B. 0101 1111 | |
| 28. |
In the given figure assume that initially Q = 1 with Clock Pulses being given, the subsequent states of Q will be |
| A. | 1, 0, 1, 0, 1...... |
| B. | 0, 0, 0, 0, 0...... |
| C. | 1, 1, 1, 1, 1...... |
| D. | 0, 1, 0, 1, 0...... |
| Answer» D. 0, 1, 0, 1, 0...... | |
| 29. |
Which of the following operation are performed on linear queues?Testing a linear queue for underflowEnqueue operationDequeue operationTesting a linear queue for overflow. Select the correct answer using the codes given below the lists |
| A. | 1, 2 and 3 |
| B. | 2, 3 and 4 |
| C. | 1, 3 and 4 |
| D. | 1, 2, 3 and 4 |
| Answer» E. | |
| 30. |
The amplifier used in miller voltage sweep should have a gain of |
| A. | - |
| B. | +1 |
| C. | + |
| D. | -1 |
| Answer» B. +1 | |
| 31. |
In an R-S latch, to set the output to high |
| 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» B. R and S are high | |
| 32. |
How many different binary numbers can be stored in a register consisting of six switches? |
| A. | 16 |
| B. | 32 |
| C. | 64 |
| D. | 128 |
| Answer» D. 128 | |
| 33. |
In one of the codes for transfer of numbers the code for the succeeding number differs from that of the number only in the change of a single digit. The code is |
| A. | ASCII |
| B. | Excess 3 CODE |
| C. | Gray CODE |
| D. | none of these |
| Answer» D. none of these | |
| 34. |
In which function is each term known as maxterm? |
| A. | SOP |
| B. | POS |
| C. | Hybrid |
| D. | SOP and Hybrid |
| Answer» C. Hybrid | |
| 35. |
For a NOR SR latch the normal resting state of inputs is |
| A. | S = R = 1 |
| B. | S = 0, R = 1 |
| C. | S = 0, R = 0 |
| D. | S = 1, R = 0 |
| Answer» D. S = 1, R = 0 | |
| 36. |
Decimal 18.29 when converted int 10's complement will become |
| A. | 81.7707 |
| B. | 81.700 |
| C. | 81.777 |
| D. | 81.077 |
| Answer» B. 81.700 | |
| 37. |
How many interrupts are there in 8085 microprocessor? |
| A. | 4 |
| B. | 5 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 38. |
1111 + 11111 = |
| A. | 101111 |
| B. | 101110 |
| C. | 111111 |
| D. | 011111 |
| Answer» C. 111111 | |
| 39. |
Given figure is the voltage transfer characteristic of |
| A. | an N MOS inverter with enhanced mode transistor as load |
| B. | an N MOS inverter with depletion mode transistor as load |
| C. | a CMOS inverter |
| D. | BJT inverter |
| Answer» D. BJT inverter | |
| 40. |
Which type of gate is in the given figure? |
| A. | NOR |
| B. | OR |
| C. | NAND |
| D. | EX-OR |
| Answer» E. | |
| 41. |
Which of the following will be hexadecimal number just for prior to F52B? |
| A. | E 51 A |
| B. | F 51 B |
| C. | E 52 B |
| D. | F 52 A |
| Answer» E. | |
| 42. |
A pair of 21114s can store __________ words of __________ bits each. |
| A. | 2114, 8 |
| B. | 1024, 8 |
| C. | 4228, 16 |
| D. | 2114, 16 |
| Answer» C. 4228, 16 | |
| 43. |
In hexadecimal number system, A is equal to decimal number |
| A. | 10 |
| B. | 11 |
| C. | 17 |
| D. | 18 |
| Answer» B. 11 | |
| 44. |
Assuming accumulator contain A 64 and the carry is set (1). What will register A and (CY) contain after SBI 0B7H? |
| A. | 12 H, 0 |
| B. | 12 H, 1 |
| C. | DDH, 0 |
| D. | DDH, 1 |
| Answer» E. | |
| 45. |
In an op-amp a virtual ground is a ground for |
| A. | voltage only |
| B. | current only |
| C. | both voltage and current |
| D. | neither voltage nor current |
| Answer» B. current only | |
| 46. |
The Central Processing Unit (CPU) of the 16-processor system developed by hardware and software teams of C-DOT, Bangalore is configured around |
| A. | Motorola 68020 |
| B. | Motorola 68040 |
| C. | Intel 80386 |
| D. | Intel 80486 |
| Answer» B. Motorola 68040 | |
| 47. |
Figure shows an 8-bit LED display. A light circle means that a LED is ON (binary 1) and a dark circle means a LED is OFF (binary 0). What is the decimal equivalent of the binary number displayed? |
| A. | 100 |
| B. | 121 |
| C. | 144 |
| D. | 172 |
| Answer» E. | |
| 48. |
For NOR gate SR flip-flop, the 'no change' condition is |
| A. | S = 0, R = 0 |
| B. | S = 1, R = 0 |
| C. | S = 0, R = 1 |
| D. | S = 1, R = 1 |
| Answer» B. S = 1, R = 0 | |
| 49. |
Data can be changed from spatial code to temporal code and vice-versa by using |
| A. | ADC and DAC |
| B. | shift Register |
| C. | synchronous counter |
| D. | timers |
| Answer» C. synchronous counter | |
| 50. |
Precisely 1 K byte means |
| A. | 1000 bits |
| B. | 1012 bits |
| C. | 1020bits |
| D. | 1024 bits |
| Answer» E. | |