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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. |
Q21 ⇒ EPROM can be both UVPROM and EEPROM [other wrong options] [Discuss in forum] UVPROM EEPROM none of the above |
Q22 ⇒ A 16-megabit dynamic random access memory (DRAM) is an integrated circuit capable of storing __________ characters (bytes). 2.1 x lo6 [other wrong options] [Discuss in forum] 1048567 16 x 1024 x 106 16 x 106 |
Q23 ⇒ In a RS flip-flop no change occurs during disable mode [other wrong options] [Discuss in forum] prohibited mode set mode reset mode |
Q24 ⇒ Which of the following is true? Both SOP and POS are two level logic [other wrong options] [Discuss in forum] SOP is a two level logic POS is a two level logic Hybrid function is two level logic |
Q25 ⇒ What will be minimum conversion rate in 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000). 9259 [other wrong options] [Discuss in forum] 9000 1000 1000 |
Q26 ⇒ The Boolean expression Y = (A + B + AB) C then Y will be equal to C [other wrong options] [Discuss in forum] AC BC none |
Q27 ⇒ BCD number 1100111 = __________ 10 67 [other wrong options] [Discuss in forum] 66 68 69 |
Q28 ⇒ 2's complement number 00011111 = __________ 10 31 [other wrong options] [Discuss in forum] -31 11 -11 |
Q29 ⇒ The parity bit is 1 or 0 [other wrong options] [Discuss in forum] always 1 always 0 none of the above |
Q30 ⇒ Assertion (A): A demultiplexer cannot be used as a decoder Reason (R): A multiplexer selects one of many outputs whereas a decoder selects on output corresponding to coded input. A is false, R is true [other wrong options] [Discuss in forum] Both A and R are correct and R is correct explanation of A Both A and R are correct but R is not correct explanation of A A is true, R is false |
Q31 ⇒ The number of inputs and outputs of a full adder are 3 and 2 respectively [other wrong options] [Discuss in forum] 2 and 3 respectively 4 and 2 respectively 2 and 4 respectively |
Q32 ⇒ A 10 MHz square wave clocks 5 bit ripple counter. The frequency of the 3rd FF output is 1.25 MHz [other wrong options] [Discuss in forum] 2 MHz 50 MHz 615 kHz |
Q33 ⇒ What will be the maximum conversion time in 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000). 108 sec [other wrong options] [Discuss in forum] 63 μ sec 40 sec 80 μ sec |
Q34 ⇒ Which of the following is 'synchronous'? Clocked R-S flip-flop [other wrong options] [Discuss in forum] Half adder Full adder R-S flip-flop |
Q35 ⇒ In which function is each term known as minterm? SOP [other wrong options] [Discuss in forum] POS Hybrid Both SOP and POS |
Q36 ⇒ A microcomputer has a 64 K memory. What is the hexadecimal notation for the first memory location? 0 [other wrong options] [Discuss in forum] FFFF 0FFF 3FFF |
Q37 ⇒ Which of these are universal gates? Both NOR and NAND [other wrong options] [Discuss in forum] Only NOR Only NAND NOR, NAND, OR |
Q38 ⇒ A transistor is operated as non-saturated switch to eliminate turn off time [other wrong options] [Discuss in forum] turn on time storage time delay time |
Q39 ⇒ Which one of the following can be used as parallel to series converter? Multiplexer [other wrong options] [Discuss in forum] Decoder Digital counter Demultiplexer |
Q40 ⇒ What is the result for expression (map metho A + D [other wrong options] [Discuss in forum] A + D + BC A D + B C A + D + BC |
Or |