Electronics Engineering Interview Questions and Answers
Question - 31 : - What are GPRS services?
Answer - 31 : -
GPRS services are defined to fall in one of the two categories:
- PTP (Point to point)
- PTM (Point to Multi point)
Some of the GPRS services are not likely to be provided by network operators during early deployment of GPRS due in part to the phased development of standard. Market demand is another factor affecting the decision of operators regarding which services to offer first.
Question - 32 : - What is a repeater?.
Answer - 32 : - A repeater is an electronic device that receives a signal and retransmits it at a higher level and/or higher power, or onto the other side of an obstruction, so that the signal can cover longer distances without degradation.
Question - 33 : - What is an Amplifier?
Answer - 33 : - An electronic device or electrical circuit that is used to boost (amplify) the power, voltage or current of an applied signal.
Question - 34 : - Example for negative feedback and positive feedback?
Answer - 34 : - Example for ve feedback is ---Amplifiers And for +ve feedback is Oscillators
Question - 35 : - How can a Pseudo Random Noise Code be usable?
Answer - 35 : -
To be usable for direct sequence spreading, a PN code must meet the following conditions:
- Sequence must be built from 2 leveled numbers.
- The codes must have sharp auto correlation peak to enable code synchronization.
- Codes must have a low cross-correlation value, the lower it is, more are the number of users which can be allowed in the system.
- The codes should be “balanced” i.e. the difference between ones and zeros in code may only be one.
Answer - 36 : - An oscillator is a circuit that creates a waveform output from a direct current input. The two main types of oscillator are harmonic and relaxation. The harmonic oscillators have smooth curved waveforms, while relaxation oscillators have waveforms with sharp changes.
Question - 37 : - What is an Integrated Circuit?.
Answer - 37 : - An integrated circuit (IC), also called a microchip, is an electronic circuit etched onto a silicon chip. Their main advantages are low cost, low power, high performance, and very small size.
Question - 38 : - What is handover and what are its types?
Answer - 38 : -
Handover in mobile communication refers to the process of transferring a call from one network cell to another without breaking the call. There are two types of handover which are as follows:
- Hard Handoff: hard handoff is the process in which the cell connection is disconnected from the previous cell before it is made with the new one.
- Soft Handoff: It is the process in which a new connection is established first before disconnecting the old one. It is thus more efficient and smart.
Answer - 39 : - Crosstalk is a form of interference caused by signals in nearby conductors. The most common example is hearing an unwanted conversation on the telephone. Crosstalk can also occur in radios, televisions, networking equipment, and even electric guitars.
Question - 40 : - What is op-amp?
Answer - 40 : - An operational amplifier, often called an op-amp , is a DC-coupled high-gain electronic voltage amplifier with differential inputs[1] and, usually, a single output. Typically the output of the op-amp is controlled either by negative feedback, which largely determines the magnitude of its output voltage gain, or by positive feedback, which facilitates regenerative gain and oscillation.