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Digital electronics
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q1 ⇒ AB + AB = A [other wrong options] [Discuss in forum] B 1 0 |
Q2 ⇒ 110.112 x 1102 = __________ 10 40.5 [other wrong options] [Discuss in forum] 30.5 20.5 10.5 |
Q3 ⇒ An 8 bit binary number is to be entered into an 8 bit serial shift register. The number of clock pulses required is 8 [other wrong options] [Discuss in forum] 1 2 4 |
Q4 ⇒ In a J-K flip flop the input J = K = 1 pulse is about toggle [other wrong options] [Discuss in forum] set reset no change |
Q5 ⇒ The subtraction of a binary number Y from another binary number X, done by adding the 2's complement of Y to X results in a binary number without overflow. This implies that the result is +ve and in 2's complement [other wrong options] [Discuss in forum] -ve and is in normal form -ve and 2's complement form +ve and is in normal form |
Q6 ⇒ A 6 bit DAC uses binary weighted resistors. If MSB resistor is 20 k ohm, the value of LSB resistor is 640 k ohm [other wrong options] [Discuss in forum] 20 k ohm 80 k ohm 320 k ohm |
Q7 ⇒ In a D latch data bit D is fed to S input and D to R input [other wrong options] [Discuss in forum] data bit D is fed to R input and D to S input data bit D is fed to both R and S inputs data bit D is not fed to any input |
Q8 ⇒ The advantages of high density IC are both (a) and (b) [other wrong options] [Discuss in forum] more circuits on chip high operating speed low power consumption |
Q9 ⇒ A current tracer responds to pulsating current only [other wrong options] [Discuss in forum] steady current only both pulsating and steady current none of the above |
Q10 ⇒ In order to enable RST 5.5, RST 6.5 and RST 7.5 interrupts, which of the following instructions are needed? El and SIM only [other wrong options] [Discuss in forum] El only SIM only None |
Q11 ⇒ In 8085 microprocessor, which of the following is not vectored interrupt? INTR [other wrong options] [Discuss in forum] RST 5.5 RST 6.5 RST 7.5 |
Q12 ⇒ In 8085 microprocessor, how many lines are there in data bus? 8 [other wrong options] [Discuss in forum] 6 2 16 |
Q13 ⇒ A universal shift register can shift both from left to right and right to left [other wrong options] [Discuss in forum] from left to right from right to left none of the above |
Q14 ⇒ The total number of fundamental products of three variables is 8 [other wrong options] [Discuss in forum] 3 5 16 |
Q15 ⇒ If memory chip size is 256 x 1 bits, the number of chips required to make 1 k byte memory is 32 [other wrong options] [Discuss in forum] 8 12 24 |
Q16 ⇒ A Read/Write memory chip has a capacity of 64 k bytes. Assuming separate data and address line and availability of chip enable signal, what is the minimum number of pins required in the IC chip? 28 [other wrong options] [Discuss in forum] 26 24 22 |
Q17 ⇒ Bipolar IC memories are fabricated using high density versions of the bipolar transistor flip-flop. [other wrong options] [Discuss in forum] high density versions of MOSFET or low density versions of bipolar transistor flip-flop. high density version of MOSFET or bipolar transistor flip-flop low density versions of MOSFETs |
Q18 ⇒ In following figure, the initial contents of the 4-bit serial in parallel out, right shift, shift register as shown in figure are 0110. After 3 clock pulses the contents of the shift register wil 1010 [other wrong options] [Discuss in forum] 0 101 1110 |
Q19 ⇒ The first machine cycle of an instruction is always a fetch cycle [other wrong options] [Discuss in forum] a memory read cycle a input/output read cycle a memory write cycle |
Q20 ⇒ All digital circuits can be realised using only Multiplexers [other wrong options] [Discuss in forum] EX-OR gates Half adders OR gates |
Or |