INTERVIEW

 Job Vacancy:

ITI Electrical – Fresher or 1-2 years experienced

For service/ repair of tea-coffee vending machines, Field job

Location: CG Road, Ahmedabad

Company: www.officeteacoffee.com

Candidate must have a 2-wheeler

Call on: 079-2646 4767 or email CV at:  admin@officeteacoffee.com

Salary – around 8000-10000

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Theory - 38 :- LAPTOP - Input System

laptop input system along with a simple figure to illustrate them:

1. Touchpad: 
   
   
   
   • Description: A touch-sensitive pad located below the keyboard, used for cursor movement and gesture-based interactions. Users can control the cursor by moving their finger across the surface of the touchpad.

2. Trackball: 
   
   
   
   • Description: A pointing device consisting of a ball housed in a socket, which users can rotate with their fingers or palm to control the cursor. Trackballs offer an alternative to traditional mice and can be more ergonomic in some cases.

3. TrackPoint (Pointing Stick):
   
   
   
   • Description: A small, joystick-like pointing device embedded in the keyboard of some laptops. Users can move the cursor by applying pressure to the TrackPoint with their finger.

4. Docking Station:
   
   
   
   • Description: A device that allows a laptop to connect to peripherals such as monitors, keyboards, and mice. Docking stations provide additional ports and expandability options, making it easier to use a laptop as a desktop replacement.

5. Upgrade Memory: 

   
   
   
   • Description: The process of increasing the amount of random access memory (RAM) installed in a laptop. Upgrading memory can improve the laptop's performance by allowing it to run more applications simultaneously without slowing down.

6. Hard Disk: 

   
   
   
   • Description: The primary storage device in a laptop, used for storing the operating system, applications, and user data. Hard disks can be upgraded to larger capacities or replaced with faster solid-state drives (SSDs) for improved performance.

These input systems and upgrade options enhance the functionality and usability of laptops, catering to the diverse needs of users.

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Digital Electronics

1. What is the fundamental unit of digital electronics?

   1. a) Transistor
   2. b) Flip-Flop
   3. c) Logic Gate
   4. d) Diode

2. Which logic gate produces an output that is the inverse of the input?

   1. a) AND
   2. b) OR
   3. c) NOT
   4. d) XOR

3. How many NAND gates are required to create a 2-input XOR gate?

   1. a) 1
   2. b) 2
   3. c) 3
   4. d) 4

4. Which type of flip-flop has two inputs and one output?

   1. a) D Flip-Flop
   2. b) T Flip-Flop
   3. c) JK Flip-Flop
   4. d) SR Flip-Flop

5. What is the binary equivalent of the decimal number 10?

   1. a) 1010
   2. b) 1110
   3. c) 1001
   4. d) 1100

6. What is the hexadecimal equivalent of the binary number 1101?

   1. a) D
   2. b) B
   3. c) A
   4. d) C

7. Which component is used to store a single binary digit?

   1. a) Transistor
   2. b) Flip-Flop
   3. c) Register
   4. d) Capacitor

8. What is the basic building block of a digital circuit?

   1. a) AND gate
   2. b) OR gate
   3. c) Flip-Flop
   4. d) Transistor

9. In which logic gate is the output true only when all inputs are true?

   1. a) AND
   2. b) OR
   3. c) NOT
   4. d) XOR

10. Which logic gate has the same output as an OR gate followed by a NOT gate?

    1. a) NAND
    2. b) XOR
    3. c) NOR
    4. d) XNOR

11. How many bits are in a byte?

    1. a) 4
    2. b) 8
    3. c) 16
    4. d) 32

12. Which type of logic gate is represented by the following truth table?

    
    A  B  |  Y
    ------|---
    0  0  |  1
    0  1  |  0
    1  0  |  0
    1  1  |  1
    

    1. a) AND
    2. b) OR
    3. c) NAND
    4. d) XOR

13. What is the output of an AND gate if both inputs are 1?

    1. a) 0
    2. b) 1
    3. c) Undefined
    4. d) Error

14. Which logic gate has an output that is true if and only if exactly one of its inputs is true?

    1. a) AND
    2. b) OR
    3. c) XOR
    4. d) NOT

15. How many inputs does an XOR gate have?

    1. a) 1
    2. b) 2
    3. c) 3
    4. d) 4

16. What is the main advantage of using flip-flops in digital circuits?

    1. a) They can store multiple bits of data
    2. b) They can perform arithmetic operations
    3. c) They can synchronize data transfer
    4. d) They can generate clock signals

17. In a digital system, what is the purpose of a decoder?

    1. a) To convert binary data into a digital signal
    2. b) To convert analog data into digital data
    3. c) To convert binary data into a specific output code
    4. d) To convert digital data into an analog signal

18. Which logic gate has an output that is true if and only if all of its inputs are false?

    1. a) AND
    2. b) OR
    3. c) XOR
    4. d) NOT

19. What is the primary function of a multiplexer in digital electronics?

    1. a) To combine multiple signals into one
    2. b) To split one signal into multiple outputs
    3. c) To invert the input signal
    4. d) To amplify the input signal

20. Which type of logic gate is represented by the following truth table?

    
    A  B  |  Y
    ------|---
    0  0  |  0
    0  1  |  1
    1  0  |  1
    1  1  |  0
    

    1. a) AND
    2. b) OR
    3. c) NAND
    4. d) XOR

21. What is the output of a NAND gate if both inputs are 1?

    1. a) 0
    2. b) 1
    3. c) Undefined
    4. d) Error

22. Which logic gate has an output that is true if and only if all of its inputs are true?

    1. a) AND
    2. b) OR
    3. c) XOR
    4. d) NOT

23. What is the function of an encoder in digital electronics?

    1. a) To convert analog data into digital data
    2. b) To convert binary data into a specific output code
    3. c) To combine multiple signals into one
    4. d) To split one signal into multiple outputs

24. Which logic gate has an output that is true if and only if all of its inputs are true?

    1. a) AND
    2. b) OR
    3. c) XOR
    4. d) NOT

25. Which of the following is not a characteristic of digital circuits?

    1. a) High accuracy
    2. b) Low noise
    3. c) High speed
    4. d) Continuous range of values

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MCQ PRACTICE - SEM -I MODULE - I

Electronics MCQs

1. What is the meaning of maximum safe reverse voltage across a diode?

a) PIV voltage
b) Knee voltage
c) Break down voltage
d) Reverse break down voltage

2. What is the peak inverse voltage of germanium diode?

a) 0.3 V
b) 0.7 V
c) 0.8 V
d) 1 V

3. Which is the first step followed in troubleshooting of electronic circuit?

a) Thermal test
b) Chemical test
c) Mechanical test
d) Physical and Sensory test

4. Which diode is used in low power communication circuits?

a) Signal diodes
b) Rectifier diodes
c) Switching diodes
d) High power diodes

5. What is the process of adding impurities to a pure semiconductor material?

a) Doping
b) Etching
c) Forming
d) Diffusion

6. Which impurity is added to form P-type semiconductor material?

a) Arsenic
b) Gallium
c) Antimony
d) Phosphorus

7. Which impurity is added to pure semiconductor to form ‘N-type’ material?

a) Boron
b) Indium
c) Arsenic
d) Gallium

8. What is the name of the process of converting AC into DC voltage?

a) Inverting
b) Rectifying
c) Amplifying
d) Demodulating

9. What is the name of the circuit diagram?

a) Bridge rectifier
b) Amplifier circuit
c) Regulator circuit
d) Modulator circuit

10. What is the output pulse frequency of the full wave rectifier with an input frequency of 50 Hz?

a) 40 Hz
b) 60 Hz
c) 100 Hz
d) 200 Hz

11. What is the disadvantage of the two diode full wave rectifier compared with a bridge rectifier?

a) DC output level is higher
b) The ripple frequency is higher
c) The need of Centre tapped transformer
d) Each diode carries half the load current

12. What is the output frequency of the pulse setting DC in a two diode full-wave rectifier?

a) Half of the input A/C frequency
b) Double the input A/C frequency
c) Same frequency of the A/C input
d) Three times the input A/C frequency

13. Which active component is used for AC to DC converter in a rectifier circuit?

a) Transformer
b) Diode
c) Capacitor
d) Resistor

14. Which rectifier circuit is used for four diodes?

a) Full wave
b) Half wave
c) Bridge
d) Two half wave

15. What type of ripple filter circuit is used for large load current requirements?

a) LC filter
b) RC filter Inductor
c) Input filter
d) Capacitor Input filter

ICTSM NSQF - Module 5 : Diode, Rectifier, Filter, Zener diode, Transistor and Amplifiers

Electronics MCQs

1. What is the current through the Zener diode with full load condition?

a) Zero
b) Minimum
c) Maximum
d) Remains constant

2. Which component filter the ripples in the rectifier circuit?

a) DIAC
b) Diode
c) TRIAC
d) Capacitor

3. Which parameter is maintained constant in Zener diode?

a) Power
b) Current
c) Voltage
d) Resistance

4. When does the Zener diode begins to conduct in the reverse biased condition?

a) When bias voltage reached 0.7 V
b) After the barrier voltage cancelled
c) Voltage across Zener reached 0.3 V
d) Voltage across it reached the Zener voltage

5. What is the current through the zener diode under no load condition?

a) Zero
b) Minimum
c) Maximum
d) Remains constant

6. Which is used for to operate in the reverse breakdown region?

a) Diode
b) Capacitor
c) Zener diode
d) Resistor

7. What is the meaning of first letter indicated in the transistor code number BC 107?

a) Germanium material used
b) Silicon material used
c) Antimony material used
d) Indium material used

8. Which electrical quantity controls the operation of the bipolar transistor device?

a) Energy
b) Current
c) Voltage
d) Frequency

9. Why transistors made of silicon are preferred over the germanium semiconductor material?

a) Complex design
b) Higher thermal stability
c) Requires complicated bias arrangement
d) Silicon transistor needs low cut-in-voltage

10. Why NPN type of transistors are preferred over the PNP type transistors?

a) NPN has lower switching speed
b) NPN has good bias stability
c) NPN has higher switching speed
d) Low operating voltage

11. Which type of transistors are required to amplify signals from the microphone / transducer?

a) Low power transistors
b) Medium power transistors
c) High power transistors
d) Epitaxial versa watt transistors

12. What type of packaging is generally used for transistors utilized for low power amplification?

a) Metal packaging
b) Plastic packaging
c) Ceramic packaging
d) Plastic packaging with metal heat sinks

13. What is the voltage gain in a transistor if the input voltage is 40 mV and the output voltage is 3.6 V?

a) 45
b) 90
c) 180
d) 270

14. How is negative feedback called?

a) Regenerative feedback
b) Degenerative feedback
c) Current controlled feedback
d) Voltage controlled feedback

15. What is the advantage of using bias in transistor circuits?

a) Provides positive feedback
b) Never reach saturation
c) Easily sets saturated
d) Gives maximum distortion

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Electronics MCQs

Electronics MCQs

1. What does a rectifier do?

a) Converts AC to DC
b) Converts DC to AC
c) Increases voltage
d) Decreases voltage

2. What is the main function of a transformer?

a) Step up or step down voltage
b) Measure resistance
c) Generate power
d) Store electrical energy

3. What principle is utilized in the operation of an induction cooker?

a) Capacitance
b) Induction
c) Resistance
d) Conduction

4. What device is used to measure electrical power consumed by a circuit?

a) Voltmeter
b) Ammeter
c) Power meter
d) Wattmeter

5. What is the primary function of an LCR meter?

a) Measure inductance, capacitance, and resistance
b) Measure only inductance
c) Measure only capacitance
d) Measure only resistance

6. What does a function generator produce?

a) Random waveforms
b) Sine waves only
c) Square waves only
d) Various waveforms

7. What does a capacitor store?

a) Current
b) Voltage
c) Energy
d) Power

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Electronics MCQs

Electronics MCQs

1. What does VDR stand for in electronics?

a) Voltage Dependent Resistor
b) Variable Duty Ratio
c) Very Detailed Report
d) Voltage Distribution Regulator

2. What is the full form of LDR?

a) Light Dependent Receiver
b) Light Diffraction Resistor
c) Light Detection and Ranging
d) Light Dependent Resistor

3. Who formulated Ohm's Law?

a) Georg Simon Ohm
b) James Clerk Maxwell
c) Michael Faraday
d) Albert Einstein

4. What is Kirchhoff's Voltage Law (KVL) also known as?

a) Loop Rule
b) Node Rule
c) Ohm's Law
d) Faraday's Law

5. What happens to the resistance of a PTC (Positive Temperature Coefficient) resistor with an increase in temperature?

a) Increases
b) Decreases
c) Remains constant
d) Becomes infinite

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Multimeter MCQs

Multimeter MCQs

1. What is the primary function of a multimeter?

a) Measure current
b) Measure voltage
c) Measure resistance
d) All of the above

2. What is the symbol used to represent DC voltage on a multimeter?

a) V~
b) V-
c) V+
d) V⎓

3. Which mode of a multimeter is used to measure resistance?

a) Voltage mode
b) Current mode
c) Resistance mode
d) Frequency mode

4. Which component of a multimeter is used to measure current?

a) Ammeter
b) Voltmeter
c) Ohmmeter
d) None of the above

5. What does the term "continuity" mode on a multimeter indicate?

a) Whether a circuit is complete
b) Voltage level
c) Resistance level
d) Current flow

6. What is the purpose of the "Hold" button on a multimeter?

a) To turn the multimeter on
b) To freeze the displayed reading
c) To change the measurement mode
d) None of the above

7. Which range should you select on a multimeter when measuring a voltage higher than the maximum range?

a) The highest range available
b) The lowest range available
c) The midpoint range
d) It doesn't matter

8. What does the "Diode" mode on a multimeter measure?

a) Resistance
b) Voltage drop across a diode
c) Current flow through a diode
d) None of the above

9. How do you select the measurement mode on a multimeter?

a) By turning the multimeter on
b) By pressing the "Mode" button
c) By selecting the appropriate range
d) By pressing the "Hold" button

10. What is the function of the "Zero" button on a multimeter?

a) To reset the measurement
b) To adjust for offset
c) To change the measurement range
d) None of the above

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Basic Electronics MCQs

Basic Electronics MCQs

1. What is the unit of electric current?

a) Watts
b) Volts
c) Amperes
d) Ohms

2. What does LED stand for in electronics?

a) Light Emitting Diode
b) Low Emission Detector
c) Light Energy Device
d) Light Enhancing Diode

3. Which component stores electrical charge?

a) Resistor
b) Capacitor
c) Diode
d) Transistor

4. What is the SI unit of resistance?

a) Ampere
b) Ohm
c) Volt
d) Joule

5. Which component amplifies or switches electronic signals?

a) Resistor
b) Capacitor
c) Diode
d) Transistor

6. What is the purpose of a diode in an electrical circuit?

a) To regulate voltage
b) To amplify signals
c) To control current flow in one direction
d) To store electrical charge

7. What is the voltage across a resistor with a current of 2 amps and resistance of 5 ohms?

a) 7 volts
b) 10 volts
c) 2.5 volts
d) 0.4 volts

8. Which of the following is NOT a passive electronic component?

a) Resistor
b) Capacitor
c) Transistor
d) Inductor

9. What is the purpose of an oscillator in electronic circuits?

a) To regulate voltage
b) To generate periodic waveforms
c) To amplify signals
d) To store electrical charge

10. Which component is commonly used for voltage regulation in electronic circuits?

a) Resistor
b) Capacitor
c) Diode
d) Zener diode

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multiple-choice questions (MCQs) related to computer network and hardware maintenance:

Multiple-choice questions (MCQs) related to computer network and hardware maintenance:

1. Which of the following devices is used to connect multiple computers in a local area network (LAN)?             a) Router b) Switch c) Modem d) Hub

2. What is the purpose of a network interface card (NIC) in a computer?                                                           a) To provide power to the computer b) To connect the computer to the internet c) To connect the computer to a printer d) To connect the computer to a network    

3. Which type of cable is commonly used for wired Ethernet networks?                                                              a) HDMI b) USB c) Ethernet d) Coaxial     

4. What is the purpose of a router in a computer network?                                                                                      a) To connect multiple networks together b) To provide power to network devices c) To connect computers to a printer d) To connect computers to the internet

5. Which of the following is NOT a common wireless networking standard?                                                        a) Ethernet b) Wi-Fi c) Bluetooth d) 3G/4G       

6. What does RAID stand for in the context of data storage systems?                                                                 a) Redundant Array of Independent Disks b) Rapid Access and Intrusion Detection c) Random Access Integrated Database d) Real-time Automated Intrusion Defense 

7. Which component of a computer is responsible for storing data permanently?                                                  a) CPU b) RAM c) Hard drive d) GPU     

8. What is the purpose of a UPS (Uninterruptible Power Supply) in a computer system?                                         a) To provide high-speed internet access b) To regulate voltage fluctuations c) To store backup data d) To monitor network traffic

9. Which of the following is NOT a common troubleshooting step for hardware issues?                                                                                                                                                                                                                      a) Rebooting the system                 b) Checking for software updates                                                                 c) Checking cable connections      d) Running diagnostic tests

10. What is the purpose of defragmentation in computer systems?                                                                         a) To increase system speed b) To prevent data loss in case of system failure                                               c) To optimize the placement of files on a hard drive d) To manage network traffic

Answers:

1. b) Switch
2. d) To connect the computer to a network
3. c) Ethernet
4. a) To connect multiple networks together
5. a) Ethernet
6. a) Redundant Array of Independent Disks
7. c) Hard drive
8. b) To regulate voltage fluctuations
9. b) Checking for software updates
10. c) To optimize the placement of files on a hard drive

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