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 !
