Here, we highlight some common questions you might be asked during a job interview for GPRS and telecom related positions. All the best for your interview Preparation.
Multiple Access Coding Scheme: Channel Encoding Scheme: Coding Scheme Speed CS-1 8.0 CS-2 12.0 CS-3 14.4 CS-4 20.0 Multislot Class: The differences between GSM and GPRS are depicted in the following table GSM – 900: Uplink spectrum is 890.2–914.8 and downlink spectrum is 935.2–959.8 DCS – 1800: Uplink spectrum is 1710.2–1784.8, and downlink spectrum is 1805.2–1879.8 Ciphering Authentication Frequency Reuse: Can you explain GPRS?
What signals are transferred in GPRS?
What are the different coding schemes used in GPRS and their importance.?
What gross data rate does GPRS provide?
Mobile Station
New mobile station is needed for accessing GPRS services. They are backward compatible with GSM for voice calls
Base Transceiver Station
Software upgrade is needed in the existing BTS
Base Station Controller
Software upgrade and new hardware, Packet Control Unit are needed for GPRS.
GPRS Support Nodes
Installation of new core network elements, known as serving GPRS support node, and gateway GPRS support node are needed to deploy GPRS
Databases
Requires software upgrade to handle new models and functions to handle databases involved in the network
Differentiate between GSM and GPRS?
GSM
GPRS
Uses one among 7 slots
Uses as many as 4+1 time slots
Connecting resources to each unit from remote location to the back office is done through a direct dial up
Does not claim any resources until some data is sent. The information is divided into packets
Circuit switched mode of operations
Packet switched mode of operations
Dedicated channel all the way to the destination is provided to the customer
One or more dedicated channels are assigned by the operator specifically for shared use
What is GSM?
Explain the services offered by GSM?
What is the maximum data rate supported by a GSM system?
Explain the Sectorization of a cell?
Explain the Frequency Reuse?
Explain the Transmitted Power Control?
Explain the Discontinuous Transmission?
Which uplink/ downlink spectrum is allocated to following? GSM – 900 and DCS – 1800?
What are the algorithms used in Ciphering and Authentication?
Explain Equalisation?
Explain Interleaving?
Explain Speech coding?
Explain Channel coding?
What is frequency re-use?
What are the interfaces between BTS and MS?
What are the interfaces between BTS and BSC?
What are the interfaces between BSS and MSC?
What are the interfaces between TRAU and BSC?
What are the interfaces between BSC and PCU?