Digital Electronics MCQs SET-2

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?

ANSWER= (B) Gray code


Q.22 A NOT gate has-

ANSWER= (B) One input and one output


Q.23 A set of instruction written in computer language is called the?

ANSWER= (C) Program


Q.24 1’s complement of 10101 is given by?

ANSWER= (A) 01010


Q.25 The shift register is designed to shift data?

ANSWER= (C) Either left or right changing the order of the bits


Q.26 The 8085 instruction RAL performs the following operations?

ANSWER= (D) Rotate the content of accumulator to the left through carry


Q.27 Disc and Drum are the

ANSWER= (B) Software part


Q.28 Which of the following memories normally has highest storage? capacity?

ANSWER= (A) Magnetic disk


Q.29 OP-AMP’s can be used to amplify: capacity?

ANSWER= (C) D.C. as well as A.C. input signal


Q.30 Number of interrupts of Intel 8085 are? capacity?



Q.31 A program written in mnemonics are called? capacity?

ANSWER= (C) Assembly level language program


Q.32 One of the method is used for A/D conversion is: capacity?



Q.33 In a microcomputer——– is its heart? capacity?

ANSWER= (A) Microprocessor


Q.34 An R-S flip flop cannot be used to design T-type flip flop as?

ANSWER= (A) R=0, S=1 is not permitted


Q.35 In Boolean Algebra the plus sign (+) indicates

ANSWER= (B) OR Operation


Q.36 Flip flop comes under the category of ?

ANSWER= (B) 1- bit storage device


Q.37 Extremely low power dissipation and low cost can be achieved in?



Q.38 The 8085 instruction INR r comes in the category ?

ANSWER= (C) Arithmetic group


Q.39 An idea OP-AMP has?

ANSWER= (B) Infinite Ri


Q.40 Which of the following Boolean rules is correct?

ANSWER= (B) A + 1 = 1

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