You can check your technical skills with our 100 objective questions and answers on digital electronics and microprocessor subjects with a practice exam.
100 Digital Electronics and Microprocessor Questions
The sample 25 questions are listed below.
Question 1:
Which binary addition is incorrect?
A) 010011 + 0.1110 = 1.0001
B) 1100.011 + 1011.011 = 10111.100
C) 1101.1 + 1011.1 = 11001.0
D) 101101 + 1101101 = 1100011
Question 2:
Which logic gate is similar to the function of two parallel switches?
A) NAND
B) AND
C) NOR
D) OR
Question 3:
Which of the following changes analog voltage to binary data?
A) D/A converter
B) A/D converter
C) None of these answers
D) Both A/D converter & D/A converter
Question 4:
How many flip-flops are needed for a 4 bit counter?
A) Three
B) Four
C) Six
D) Two
Question 5:
The fastest logic family used in high-speed applications is
A) AEL
B) TTL
C) ECL
D) DTL
Question 6:
How many inputs can be supplied to a logic gate with a fan in factor of four?
A) Eight
B) Four
C) Three
D) Two
Question 7:
Microprocessors were introduced in the year
A) 1981
B) 1971
C) 1961
D) 1951
Question 8:
According to Boolean algebra, 1+ A+B+C is equal to
A) ABC
B) 1
C) 1+ABC
D) A+B+C
Question 9:
Monolithic technology is widely used in the manufacture of
A) Integrated circuits
B) All of these answers
C) Transistors
D) Antenna
Question 10:
Which of the following represents the decimal form of binary 0.0111?
A) 0.4375
B) 0.7964
C) 0.2728
D) 0.1600
Question 11:
The fan out of a 7400 NAND gate is
A) 2 TTL
B) 10 TTL
C) 5 TTL
D) 8 TTL
Question 12:
The voltage needed for a TTL IC power supply is
A) 10 V dc
B) 2 V dc
C) 5 V dc
D) 20 V dc
Question 13:
A micro-computer has a 64 K memory.
What is the hexadecimal notation for the first memory location?
A) FFFF
B) 0000
C) 3FFF
D) 0FFF
Question 14:
Binary 1000 multiplied by binary 1000 gives
A) 100000
B) 10000000
C) 1000000
D) 10000
Question 15:
Which logic function has the output law only when both inputs are high?
A) NOR
B) NAND
C) OR
D) AND
Question 16:
In LIFO
A) Only the top of the slack is immediately accessible
B) Only the first in is accessible
C) Only the top of the slack is never accessible
D) Only the first is in not accessible
Question 17:
A device that converts from decimal to binary numbered is called
A) Converter
B) CPU
C) Decoder
D) Encoder
Question 18:
When all the seven segments of a display are energized, the number shown will be
A) 8
B) 1
C) 0
D) 5
Question 19:
The __________is ultraviolet light erasable and electrically programmable
A) ROM
B) EPROM
C) PROM
D) RAM
Question 20:
Which multi-vibrator can be used as a clock timer?
A) None of these answers
B) Bistable
C) Astable
D) Both Astable & Bistable
Question 21:
A minterm is
A) The minimum term in a Boolean function
B) A prime implicant
C) A square on a karnaugh map
D) Always smaller than a maxterm
Question 22:
What is the percent resolution of a 12 bit BCD D/A converter?
A) 0.1001%
B) 0.02442%
C) 0.0244%
D) 0.1%
Question 23:
Binary 1111 when subtracted from binary 11111, the result in binary is
A) 1111
B) 1000
C) 111111
D) 10000
Question 24:
Which of the following is used as a data selector?
A) Decoder
B) Multiplexer
C) Encoder
D) Demultiplexer
Question 25:
The mnemonics used in writing a program is called
A) Object program
B) Assembly language
C) Micro instruction
D) Fetch cycle
Click on the below button to launch the Quiz. Each question carries 1 mark. You have to score 50% of the marks to pass the test.
All 100 questions and answers are available in the Quiz.
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