BT Group Graduate Engineer Interview Questions and Answers

Q1. 1. What is wireless communication?
Ans. 
Wireless communication refers to the transmission of information without the use of physical connections or wires.
• Wireless communication allows devices to communicate with each other over a distance using electromagnetic waves.

• It enables the transfer of data, voice, and video signals wirelessly.

• Examples of wireless communication technologies include Wi-Fi, Bluetooth, cellular networks, satellite communication, and radi
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Q2. 1. What is Telecommunication?
Ans. 
Telecommunication is the transmission of information over a distance using electronic means.
• Telecommunication involves the exchange of information between two or more parties.

• It uses various technologies such as telephones, radios, television, and the internet.

• Telecommunication enables real-time communication, allowing people to connect and communicate regardless of their physical location.

• Examples of telecommunication...read more
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Q3. What are the types of modulations?
Ans. 
Modulation is the process of varying a carrier signal in order to transmit information.
• Amplitude Modulation (AM) - varying the amplitude of the carrier signal

• Frequency Modulation (FM) - varying the frequency of the carrier signal

• Phase Modulation (PM) - varying the phase of the carrier signal

• Quadrature Amplitude Modulation (QAM) - combining amplitude and phase modulation

• Pulse Amplitude Modulation (PAM) - varying the amp...read more
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Q4. What is the difference between 2G, 3G, 4G? Why 5G?
Ans. 
2G, 3G, 4G, and 5G are different generations of mobile network technology.
• 2G refers to second-generation mobile networks that primarily provided voice and text messaging services.

• 3G introduced faster data transfer speeds, enabling internet browsing, video calling, and multimedia services.

• 4G further improved data speeds, offering high-quality video streaming, online gaming, and advanced mobile applications.

• 5G is the fif...read more
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Q5. Questions regarding my projects which were based on radar.
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Q6. How to remove elements from list?
Ans. 
To remove elements from a list, use the remove() method or list comprehension.
• Use the remove() method to remove a specific element from the list.

• Use list comprehension to remove multiple elements based on a condition.

• Example: myList.remove('element') or myList = [x for x in myList if x != 'element']
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Q1. What is resistor?
Ans. 
A resistor is an electronic component that resists the flow of electrical current.
• Resistors are used to control the amount of current flowing in a circuit.

• They are measured in ohms (Ω) and have color-coded bands to indicate their resistance value.

• Resistors dissipate energy in the form of heat when current flows through them.

• Examples of resistors include carbon film resistors, metal film resistors, and wirewound resisto
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Q2. Advantages of dc motor?
Ans. 
DC motors have advantages such as high starting torque, easy speed control, and simple construction.
• High starting torque allows for quick acceleration

• Easy speed control through voltage adjustment

• Simple construction with fewer parts and lower cost

• Efficient operation with minimal energy loss

• Suitable for applications requiring constant speed or variable speed operation
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Q3. Advantages of rotor?
Ans. 
Rotors provide mechanical advantage, increase efficiency, and allow for compact design.
• Rotors provide mechanical advantage by converting rotational motion into linear motion.

• They increase efficiency by reducing friction and wear compared to sliding or rubbing components.

• Rotors allow for compact design in various applications such as engines, turbines, and pumps.

• Examples include helicopter rotors, brake rotors in vehicl
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Q4. What is electric current?
Ans. 
Electric current is the flow of electric charge through a conductor.
• Electric current is measured in Amperes (A).

• It is caused by the movement of electrons in a conductor.

• The direction of current flow is from positive to negative.

• Examples of sources of electric current include batteries and power outlets.
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Q5. What is stator?
Ans. 
Stator is the stationary part of an electric motor or generator.
• Stator is the stationary component in an electric motor or generator that surrounds the rotor.

• It does not rotate and is responsible for producing a magnetic field to interact with the rotor.

• Examples include the stator in a car alternator or the stator in a wind turbine generator.
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Q6. What are the advantages of generator
Ans. 
Generators provide backup power during outages and can be used in remote locations.
• Provides backup power during outages

• Can be used in remote locations where power grid is not available

• Used in construction sites, camping trips, outdoor events, etc.
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There was a coding test on hackerank

Basic aptitude questions

Q1. Difference between queue and stack
Ans. 
A queue is a data structure that follows the FIFO (First-In-First-Out) principle, while a stack follows the LIFO (Last-In-First-Out) principle.
• Queue: Elements are added at the rear and removed from the front.

• Stack: Elements are added and removed from the top.

• Queue is like a line of people waiting for a bus, while a stack is like a stack of plates.

• Queue is used in breadth-first search algorithms, while stack is used in
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Q2. Questions based on sql queries
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Assignment consist of MCQ test dealing with technical knowledge followed by game where you need to answer as much as answer in limited time (negative marking is there).

Q1. Basics about Electronic Devices
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Q2. Some general questions regarding electrical devices
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Q1. Networks, predict output for programs, data structures.
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Q1. Gamified & adept test
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