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Instruction:
 Total number of questions : 20.
 Time alloted : 30 minutes.
 Each question carry 1 mark, no negative marks.
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1.  Convert the Gray code 1011 to binary. 

Your Answer: Option (Not Answered) Correct Answer: Option D Learn more problems on : Number Systems and Codes Discuss about this problem : Discuss in Forum 
2.  A binary number can be converted to a decimal number by summing the decimal values of the weights of all the 1s in the binary number. 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : Number Systems and Codes Discuss about this problem : Discuss in Forum 
3.  12_{10 }= 1101_{2} = C_{16} = 00010010 BCD 

Your Answer: Option (Not Answered) Correct Answer: Option B Learn more problems on : Number Systems and Codes Discuss about this problem : Discuss in Forum 
4.  A 4variable ANDOR circuit produces a 1 at its Y output. Which combination of inputs is correct? 

Your Answer: Option (Not Answered) Correct Answer: Option C Learn more problems on : Combinational Logic Analysis Discuss about this problem : Discuss in Forum 
5.  The expression can be directly implemented using only ________. 

Your Answer: Option (Not Answered) Correct Answer: Option C Learn more problems on : Combinational Logic Analysis Discuss about this problem : Discuss in Forum 
6.  The pulse width of a oneshot circuit is determined by ________. 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : FlipFlops Discuss about this problem : Discuss in Forum 
7.  Synchronous binary counters can only be used for the application of timing of digital systems. 

Your Answer: Option (Not Answered) Correct Answer: Option B Learn more problems on : Counters Discuss about this problem : Discuss in Forum 
8.  An OR gate with inverted inputs functions as: 

Your Answer: Option (Not Answered) Correct Answer: Option B Learn more problems on : Describing Logic Circuits Discuss about this problem : Discuss in Forum 
9.  How many BCD adders would be required to add the numbers 973_{10} + 39_{10}? 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : Digital Arithmetic Operations and Circuits Discuss about this problem : Discuss in Forum 
10.  Subtract the following binary numbers.


Your Answer: Option (Not Answered) Correct Answer: Option B Learn more problems on : Digital Arithmetic Operations and Circuits Discuss about this problem : Discuss in Forum 
11.  Inside a computer all arithmetic operations take place in the ________. 

Your Answer: Option (Not Answered) Correct Answer: Option B Learn more problems on : Digital Arithmetic Operations and Circuits Discuss about this problem : Discuss in Forum 
12.  The major advantage of CMOS logic circuits over TTL is very low power consumption. 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : IntegratedCircuit Logic Families Discuss about this problem : Discuss in Forum 
13.  The minimum input voltage recognized as HIGH by a TTL gate is ________. 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : IntegratedCircuit Logic Families Discuss about this problem : Discuss in Forum 
14.  The 74139 dual fourline demultiplexer functions as a decoder if ________. 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : MSI Logic Circuits Discuss about this problem : Discuss in Forum 
15.  In HDL, the operation of the DEMUX is exactly described using a ________. 

Your Answer: Option (Not Answered) Correct Answer: Option D Learn more problems on : MSI Logic Circuits Discuss about this problem : Discuss in Forum 
16.  In the keypad encoder, just after the 4 ms mark, the simulation initiates the release of the key by changing the column value to ________, which causes the d output to go into its HiZ state. 

Your Answer: Option (Not Answered) Correct Answer: Option D Learn more problems on : Digital System Projects Using HDL Discuss about this problem : Discuss in Forum 
17.  Determine the output voltage V_{out} for the circuit in the given figure. 

Your Answer: Option (Not Answered) Correct Answer: Option D Learn more problems on : Signals and Switches Discuss about this problem : Discuss in Forum 
18.  What is a disadvantage of CMOS in place of TTL? 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : Signals and Switches Discuss about this problem : Discuss in Forum 
19.  Show from the truth table how an exclusiveOR gate can be used to invert the data on one input if the other input is a special control function. 

Your Answer: Option (Not Answered) Correct Answer: Option B Learn more problems on : ExOR and ExNOR Gates Discuss about this problem : Discuss in Forum 
20.  The RST pin requires a HIGH to reset the 8051 microcontroller. 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : The 8051 Microcontroller Discuss about this problem : Discuss in Forum 