Loading Test...
Instruction:
 This is a FREE online test. DO NOT pay money to anyone to attend this test.
 Total number of questions : 20.
 Time alloted : 30 minutes.
 Each question carry 1 mark, no negative marks.
 DO NOT refresh the page.
 All the best :).
1.  What is an analogtodigital converter? 

Your Answer: Option (Not Answered) Correct Answer: Option B Learn more problems on : Digital Concepts Discuss about this problem : Discuss in Forum 
2.  The controls on an oscilloscope that will help obtain a stable display are in the ________. 

Your Answer: Option (Not Answered) Correct Answer: Option C Learn more problems on : Digital Concepts Discuss about this problem : Discuss in Forum 
3.  Hex is often used in digital applications as a shorthand way to represent strings of bits. 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : Number Systems and Codes Discuss about this problem : Discuss in Forum 
4.  Use Boolean algebra to find the most simplified SOP expression for F = ABD + CD + ACD + ABC + ABCD. 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : Boolean Algebra and Logic Simplification Discuss about this problem : Discuss in Forum 
5.  The Boolean expression C + CD is equal to ________. 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : Boolean Algebra and Logic Simplification Discuss about this problem : Discuss in Forum 
6.  As a technician you are confronted with a TTL circuit board containing dozens of IC chips. You have taken several readings at numerous IC chips, but the readings are inconclusive because of their erratic nature. Of the possible faults listed, select the one that most probably is causing the problem. 

Your Answer: Option (Not Answered) Correct Answer: Option C Learn more problems on : Combinational Logic Circuits Discuss about this problem : Discuss in Forum 
7.  For the XNOR gate truth table shown below, the values for w, x, y, and z are ____, ____, ____, and ____, respectively. 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : Combinational Logic Circuits Discuss about this problem : Discuss in Forum 
8.  The output pulse width for a 555 monostable circuit with R_{1} = 3.3 k and C_{1} = 0.02 F is ________. 

Your Answer: Option (Not Answered) Correct Answer: Option B Learn more problems on : FlipFlops Discuss about this problem : Discuss in Forum 
9.  The JK flipflop is a standard building block of clocked (sequential) logic circuits known as a ________. 

Your Answer: Option (Not Answered) Correct Answer: Option B Learn more problems on : FlipFlops Discuss about this problem : Discuss in Forum 
10.  A glitch that appears on the decoded output of a ripple counter is often difficult to see on an oscilloscope because ________. 

Your Answer: Option (Not Answered) Correct Answer: Option D Learn more problems on : Counters Discuss about this problem : Discuss in Forum 
11.  Which is not part of a hard disk drive? 

Your Answer: Option (Not Answered) Correct Answer: Option D Learn more problems on : Memory and Storage Discuss about this problem : Discuss in Forum 
12.  Each programmable array logic (PAL) gate product is applied to an OR gate and, if combinational logic is desired, the product is ORed and then: 

Your Answer: Option (Not Answered) Correct Answer: Option B Learn more problems on : Programmable Logic Device Discuss about this problem : Discuss in Forum 
13.  The programming technologies that are used in CPLD devices are all nonvolatile. 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : Programmable Logic Device Discuss about this problem : Discuss in Forum 
14.  The GAL22V10 has 12 outputs pins and 10 input pins. 

Your Answer: Option (Not Answered) Correct Answer: Option B Learn more problems on : Programmable Logic Device Discuss about this problem : Discuss in Forum 
15.  The symbol shown below is an AND gate. 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : Describing Logic Circuits Discuss about this problem : Discuss in Forum 
16.  Add the following BCD numbers.


Your Answer: Option (Not Answered) Correct Answer: Option D Learn more problems on : Digital Arithmetic Operations and Circuits Discuss about this problem : Discuss in Forum 
17.  Whenever a totempole TTL output goes from LOW to HIGH, a highamplitude current spike is drawn from the V_{cc} supply. How is this effect corrected to a digital circuit? 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : IntegratedCircuit Logic Families Discuss about this problem : Discuss in Forum 
18.  What is the purpose of a decoder's inputs? 

Your Answer: Option (Not Answered) Correct Answer: Option D Learn more problems on : MSI Logic Circuits Discuss about this problem : Discuss in Forum 
19.  In a typical IC monostable multivibrator circuit, at the falling edge of the trigger input, the output switches HIGH for a period of time determined by the ________. 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : Multivibrators and 555 Timer Discuss about this problem : Discuss in Forum 
20.  A microcontroller is called a computer on a chip. 

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