1. Ericsson Technical Interview
Questions
1. How does a mobile phone works?
2. Explain Hands off in detail? ( All GSM involved here on whatever you answer )
3. What is the difference between TCP/IP and SSL?
4. What will happen if I type Ericsson.com?
5. What will happen if I type Ericsson.com again?
6. At a DNS server how will you get your desired IP address from the millions of IP addresses present there?
7. What is the purpose of DNS?
8. In DNS S stands for ---SERVICE,SPACE,SYSTEM?
9. Explain all layers of TCP?
10. Give a program in C to convert a decimal number to binary?
11. What if the input inputted is negative?
12. What if the number inputted is zero?
13. What is a prime number?
14. How do u check it?
Give a better method??(if u keep a check of dividing from 2 to N-1)
15. A conversion from Hexa Decimal to binary
16. Explain TDM? Give diagram?
17. Give demerits of FDM?
18. What is a multiplexer? Whats is the purpose of using it?
19. How will you get a 16:1 multiplexer from 2:1 multiplexer?Explain thoroughly?
These are some questions of Ericsson Techincal interviews which my friends and me faced.
Tip--ECE students appearing in Ericsson should not skip programming. Atleast it cost me my interview.
how is the wave guide propagation pattern ??
2. Ethernet Frame format? Explain STP and RSTP and how t oextend the vlans beyond 4094
What is VSWR? what are waveguides and their types. What is Aloha?
Shannon's information capacity theorem, Sampling theorem, antenna
Question
gain, types of antennae, GSM/CDMA comparison, modulation techniques,
Superheterodyne receiver
Voltage standing wave ratio
ALOHA is a old ethernet or networking protocol
sampling theorem:fs> 2fmax
G=4piD/lambda square
modulation tech:AM,FM,PM,QPSK,QAM,OFDM..
superheterodyne Reciever:its freq converter...or a frequency
synthesizer ckt for conversion of frequencies
What is meant by high impedance state in digital electronics?
In tri state devices, used in digital circuits there is a
third state beside logic 0 and logic one. That is called
High Impedance state.
By this state we mean that there will not be any change on
output even by changing our input. THis is due high
resistance offered by input circuit. So output get fixed in
such cases.
AKSHAY BISHT
(NITian)
Why the RSL of microwave link is in -ive?
What is the total output power of an complete BTS, in dbm & watts.
43dbm/20Wattb but this the output pwr of TRX So Total o/p
pwr of BTS depends on no. of TRX and also no. of combiner used
Explain BTS configuration 4+2+2
bts configration 4+2+2 means there are 4 trx in the 1st sector
then 2 in second sector
then 2 in the third sector
What's the range of C/A?
C/A >-9 dbm
it is the logarithmic difference of Adjacent channel
frequencies.
What is VSWR? what are waveguides and their
types. What is Aloha? Shannon's information
capacity theorem, Sampling theorem, antenna gain, 1 204
types of antennae, GSM/CDMA comparison,
modulation techniques, Superheterodyne receiver
What's the range of C/A? 2 595
What's The
why rxlevel is negative valued ??? Range Of 2 714
C/A?
what is sdh,pdh?how exactly the call get
Relaince 7 1797
connected?
what is SDH and PDH relate the differences
2 3383
between them?
3. what is the features of GSM Technology and
4 2207
CDMA technology
Telecom BSS related ques: For cascaded 1800
BTS with master 900 BTS,if 900 master BTS is
down for its own equipment fault,cascaded slave
1800 BTS gets down/stop carrying traffic without
any fault as BCCH and other controllong channels
are in master 900 BTS.Is there any Yes Nokia
technology/system to turn the slave 1800 BTS to a Sieman 1 3318
single 1800 BTS autometcally when 900 master Network
BTS is down for its own equipment fault???It is
possible to make the slave 1800 BTS single live
BTS manually.But I want to know the autometic
system/process.if there is any....if not available,
how can we generate the system??
3.Which type of fading cause serious distortion of
modulated signal a)selective fading b)interference Hcl 7 2887
fading c)absorption fading d)polarization fading
What is the ruturn loss? 4 1595
what is VSWR? Ericssom 3 6432
Waht is polarization,explain verical and
6 2774
horizantal?
What is the GSM fundamental? 7 3548
how can we increase back up of 300ah battery.can
3 1701
we connects one more 300ah parallel or series?
what is the use of combiner in gsm phones 7 2456
what is integration,optimization of gsm
corenetwork in practice?
