Hey Guys welcome to CSE Study247 , Today I am provide you Digital Electronics MCQs SET-2.
Which is very Useful for DRDO CEPTAM, ISRO, COPA, CCC, O level, Bank, MTS, Railway, Data Entry Operator, PWD,PHED, Hindustan Aeronautics Ltd., Air India, NTPC, BHEL, GAIL, PGCIL, MTS, SSC, CGL, CHSL,KVS and all other computer exams
This page provide you Digital Electronics Multiple Choice Question Answer that is very useful for Semester , DRDO, ISRO ,Banking , Railway, Gate and another exam.
SET-1 [1 To 20]
Q.21 Which of the following is minimum error code?
A) Octal code
B) Gray code
C) Binary code
D) Excess 3-code
ANSWER= (B) Gray code
Check Answer
Q.22 A NOT gate has-
A) Two input and one output
B) One input and one output
C) One input and two output
D) None of these
ANSWER= (B) One input and one output
Check Answer
Q.23 A set of instruction written in computer language is called the?
A) Software
B) Hardware
C) Program
D) None of these
ANSWER= (C) Program
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Q.24 1’s complement of 10101 is given by?
A) 01010
B) 01011
C) 10101
D) 00100
ANSWER= (A) 01010
Check Answer
Q.25 The shift register is designed to shift data?
A) Only to left changing the order of the nits
B) Only to right changing the order of the bits
C) Either left or right changing the order of the bits
D) Either left or right without changing the order of the bits
ANSWER= (C) Either left or right changing the order of the bits
Check Answer
Q.26 The 8085 instruction RAL performs the following operations?
A) Rotate the content of accumulator to the right
B) Rotate the content of accumulator to the left
C) Rotate the content of accumulator to the right through carry
D) Rotate the content of accumulator to the left through carry
ANSWER= (D) Rotate the content of accumulator to the left through carry
Check Answer
Q.27 Disc and Drum are the
A) Hardware part of the computer
B) Software part
C) Firmware
D) None of these
ANSWER= (B) Software part
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Q.28 Which of the following memories normally has highest storage?
capacity?
A) Magnetic disk
B) Magnetic tape
C) Semi conductor memory
D) Core memory
ANSWER= (A) Magnetic disk
Check Answer
Q.29 OP-AMP’s can be used to amplify:
capacity?
A) D.C. input signal
B) A.C. input signal
C) D.C. as well as A.C. input signal
D) None of these
ANSWER= (C) D.C. as well as A.C. input signal
Check Answer
Q.30 Number of interrupts of Intel 8085 are?
capacity?
ANSWER= (A) 5
Check Answer
Q.31 A program written in mnemonics are called?
capacity?
A) High level language program
B) Low level language program
C) Assembly level language program
D) None of these
ANSWER= (C) Assembly level language program
Check Answer
Q.32 One of the method is used for A/D conversion is:
capacity?
A) R-2R ladder
B) Weighted binary resistors
C) Successive approximation
D) None of these
ANSWER= ()
Check Answer
Q.33 In a microcomputer——– is its heart?
capacity?
A) Microprocessor
B) ALU
C) Control Unit
D) None of these
ANSWER= (A) Microprocessor
Check Answer
Q.34 An R-S flip flop cannot be used to design T-type flip flop as?
A) R=0, S=1 is not permitted
B) R=0, S=0 is not permitted
C) R=1, S=0 is not permitted
D) R=1, S=1 is not permitted
ANSWER= (A) R=0, S=1 is not permitted
Check Answer
Q.35 In Boolean Algebra the plus sign (+) indicates
A) AND Operation B) OR Operation
C) NOT Operation D) None
ANSWER= (B) OR Operation
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Q.36 Flip flop comes under the category of ?
A) 2- bit storage device
B) 1- bit storage device
C) Multi bit storage device
D) None of these
ANSWER= (B) 1- bit storage device
Check Answer
Q.37 Extremely low power dissipation and low cost can be achieved in?
A) MOS ICs
B) CMOS ICs
C) TTL ICs
D) ECL ICs
ANSWER= (B) CMOS ICs
Check Answer
Q.38 The 8085 instruction INR r comes in the category ?
A) Machine control group B) Branch group
C) Arithmetic group D) Data transfer group
ANSWER= (C) Arithmetic group
Check Answer
Q.39 An idea OP-AMP has?
A) Infinite Av B) Infinite Ri
C) Zero D) All of the above
ANSWER= (B) Infinite Ri
Check Answer
Q.40 Which of the following Boolean rules is correct?
A) A + 0 = 0 B) A + 1 = 1
C) A + A compliment =A.A D) A + AB = A compliment +B
ANSWER= (B) A + 1 = 1
Check Answer
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