Home / Online Test / 4-Bit Parallel Adder/Subtractor Objective Questions – Part 2 Online Test 4-Bit Parallel Adder/Subtractor Objective Questions – Part 2 S Bharadwaj ReddyLeave a comment 4-Bit Parallel Adder/Subtractor Objective Questions Digital Electronics Objective Questions 0% What is Manchester carry chain? Is a chain of controlled inverter Variation of a carry-lookahead adder Variation of a full-adder None of the Mentioned Correct! Wrong! - Continue >> The carry propagation delay in 4-bit full-adder circuits: Is cumulative for each stage and limits the speed at which arithmetic operations are performed Is normally not a consideration because the delays are usually in the nanosecond range Increases in direct ratio to the total number of full-adder stages, but is not a factor in limiting the speed of arithmetic operations Decreases in direct ratio to the total number of full-adder stages Correct! Wrong! - Continue >> For a 4-bit parallel adder, if the carry-in is connected to a logical HIGH, the result is: A one will be added to the final result That carry-out will always be HIGH The same as if the carry-in is tied LOW since the least significant carry-in is ignored The carry-out is ignored Correct! Wrong! - Continue >> The summing outputs of a half or full-adder are designated by which Greek symbol? Omega Theta Lambda Sigma Correct! Wrong! - Continue >> The main disadvantage of Manchester carry chain is Both propagation delay and capacitive load Capacitive load Ripple factor Propagation delay Correct! Wrong! - Continue >> Carry lookahead logic uses the concepts of Inverting the inputs Generating and propagating carries Complementing the outputs Ripple factor Correct! Wrong! - Continue >> Fast-look-ahead carry circuits found in most 4-bit full-adder circuits which Determine sign and magnitude Reduce propagation delay Add a 1 to complemented inputs Increase ripple delay Correct! Wrong! - Continue >> What distinguishes the look-ahead-carry adder? It is easier to implement logically than a full adder It requires advance knowledge of the final answer It is slower than the ripple-carry adder It is faster than a ripple-carry adder Correct! Wrong! - Continue >> Why is a fast-look-ahead carry circuit used in the 7483 4-bit full-adder? To speed up the circuit To decrease the cost To make it smaller To slow down the circuit Correct! Wrong! - Continue >> One way to make a four-bit adder to perform subtraction is by: Inverting the B inputs Inverting the output Grounding the B inputs Inverting the carry-in Correct! Wrong! - Continue >> What is one disadvantage of the ripple-carry adder? All of the Mentioned More stages are required to a full adder The interconnections are more complex It is slow due to propagation time Correct! Wrong! - Continue >> Share the quiz to show your results ! Facebook Facebook Just tell us who you are to view your results ! Show my results >> 4-Bit Parallel Adder/Subtractor – 2 I got %%score%% of %%total%% right Share your results Facebook Facebook Twitter Google+ ↺ PLAY AGAIN ! Previous Post:4-Bit Parallel Adder/Subtractor Objective Questions – Part 1Next Post:Fast Adder & Serial Adder Objective Questions – Part 1 Related Articles Online Test Time Division Multiplexing Objective Questions March 21, 2017 Online Test Power Diodes Objective Questions – Part 1 December 1, 2014 Online Test Electrical Machines Objective Questions – Set 23 December 2, 2014 Online Test Electric Circuits Objective Questions – Set 7 December 4, 2014 Online Test PWM Inverters Objective Questions – 1 December 1, 2014 Online Test Hunting and Damper Windings January 2, 2015 Online Test Measurements & Instrumentation Quiz – Set 8 June 8, 2017 Online Test Thermography and Thermometry Objective Questions April 1, 2017 Online Test Quine McCluskey Logic Functions Objective Questions May 1, 2015 Online Test Permanent Magnet DC (PMDC) Motors Questions January 2, 2015 Online Test Measurement of Phase Angle Objective Questions January 9, 2017 Online Test Heat Flow Balance Systems Objective Questions February 21, 2017 Also Read : Single Phase Semi-Converters Objective Questions – 2 December 1, 2014 Data Transmission Objective Questions March 18, 2017 PWM Inverters Objective Questions – 5 December 1, 2014 Leave a Reply Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment.