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1.0.0
MCQ
4861. In TV transmission the voice signal is modulated.
AM
FM
PM
FSK
Voice signal is FM modulated and video signal is AM modulated.
4862. Which one is an example of DBMS?
MS Word
MS Excel
C**
MS Access
Datbase management system (DBMS) examples: My- SQL, Postgre-SQL, Microsoft Access, SQL server, Filemaker, Oracle, Foxpro.
4863. How many unique signs could be specified by using ASCII-8?
128
256
512
65536
ASCII is a computer code which uses 128 different encoding combinations of a group of seven bits (2 128) to represent, characters A to Z. both upper and lower case special characters, <, etc.
4864. Non-coherently detection is not possible for-
PSK
ASK
FSK
Both (a) and (c)
4865. Which of the following converts the document written by HTML?
Browser
FTP
HTPP
Web
4866. একটি বেতার তরঙ্গের দৈর্ঘ্য ৩০০ মিটার। এর কম্পাঙ্ক কত?
৫ মেগাহার্টজ
১ মেগাহার্টজ
৪ মেগাহার্টজ
২ মেগাহার্টজ
4867. The intermediate frequency in a standard AM receiver is-
455 Hz
455 kHz
4.55 MHz
None of the above
4868. Which kind of switching technique indicates the transfer of coded values from input to output during the same interval of time?
Space Switching
Time Switching
Combination Switching
None of the above
If the coded values are transferred during the same time interval from input to output the technique is called space switching.
4869. রাডারে ব্যবহৃত হয়-
মাইক্রো তরঙ্গ
আলোকতরঙ্গ
রঞ্জনরশ্মি
গামা-রশ্মি
4870. The ratio of number of successful calls to the number of all call attempts is known as:
Call Back Rate (CBR)
Call Completion Rate (CCR)
Busy Hour Call Rate (BHCR)
Effective Call Rate (ECR)
Call completion rate is defined as the ratto of number of successful calls to the menber of all call attempt.
4871. Which one transfers data at the highest speed?
UTP
STP
co-axial cable
fiber optic cable
Fiber optic cable transmit data in the form of light at very high speed.
4872. Sampling সাধারণত কত প্রকার?
2
3
4
5
4873. VSAT-এ ব্যবহৃত অ্যান্টেনার ব্যাস কত?
1.2m-2.5m
2.2m-3.5m
5m-7m
5m-10m
4874. একটি ট্রান্সমিটার অ্যান্টেনাতে ক্যারিয়ার পাওয়ারে 10kW সরবরাহ করে। মোট পাওয়ার 10.8 kW হলে, মডুলেশন কত?
0.4
0.6
0.8
0.2
4875. If the voice channel is free in PSTN then what would be the maximum data rate supported by 3.1 kHz bandwidth of voice channel?
4000 bps
5000 bps
6000 bps
8000 bps
4876. What is the acceptance value of dividing point between the Wonderb and Jitter?
200Hz
50Hz
20Hz
10Hz
Frequency range of/ phase variations Liner/>10Hz Wander /0-10Hz
4877. Fiber optic cable is made of-
Glass
Copper
Plastic
None
নোট: A fiber optic cable is made of a glass or plastic core that carries light surrounded by the glass cladding that reflects "escaping" light back into the core, resulting in the light being guided along the fiber
4878. 10V-এর আউটপুট ভোল্টেজ এবং 1mV-এর নয়েজ ভোল্টেজ উদ্ভূত একটি অ্যামপ্লিফায়ারের সিগন্যাল/নয়েজ রেশিও কত হবে?
80dB
-40dB
1004B
40dB
4879. Which one acts as the backbone of global village?
Hardware
Software
Networks and connectivity
Data
Networks and connectivity is termed as the backbone of global village. Using network, people can connect each other from one place to another place and all over the world.
4880. নক্ষত্রপুঞ্জ হতে যে নয়েজ ছড়ায়, তাকে কী বলে?
Thermal noise
Shot noise
Flicker noise
Cosmic noise