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Digital-electronics Questions Set 133:

Quiz Mode

What are customized ROMs also called?

Flash ROM

Mask ROM

EPROM

Stylized ROM

Solution:

Which logic gates are ideal for checking the parity of binary numbers?

AND

NAND

XOR

XNOR

Solution:

The main memory implemented using semiconductor chips is

Cache

Registers

Virtual memory

Main memory

Solution:

What is the other name for an UP-DOWN counter?

Dual counter

Multimode counter

Multi counter

Two counter

Solution:

Represent the Boolean function, f (A,B,C) = A + ABC, in terms of its minterms:

$Σ$ m(4,5,6,7)

$Σ$ m(1,4,5,6)

$Σ$ m(1,2,6,7)

$Σ$ m(2,3,6,7)

Solution:

The codes in which each successive code word differs from the preceding one in only one bit position are called

BCD codes

sequential codes

self-complementing codes

cyclic codes

Solution:

Which of the following Boolean expressions can be directly written from the truth table?

Minimum term canonical formula

Maximum term canonical formula

None of the above

Both minimum term and maximum term canonical formulas

Solution:

Which of the following digital logic circuits can be used to add more than 1 – bit simultaneously?

Full – adder

half- adder

Ripple – carry adder

serial adder

Solution:

You are provided with a black box that has ICs of a logic family. The black box has an inscription that gives hints about the logic family present in the black box.

The IC numbers start with 74

The gate speed is inversely proportional to the propagation delay

It has either an Open Collector output, Totem-pole output, or a three-state output.

What is the logic family inside the black box?

DTL

TTL

DCTL

ECL

Solution:

Consider the following statements describing Synchronous and Asynchronous Sequential Circuits:

Statement 1: In an asynchronous circuit, the state variables are not synchronized to change simultaneously.

Statement 2: Synchronous sequential circuits are not called self-timed circuits.

Statement 3: Clocked flip flops are used as memory elements in sequential circuits.

Which one of the above statements is incorrect?

Only Statement 2

Statement 2 and 3

Only Statement 3

Statement 1 and 2

Digital-electronics Questions Set 133:

What are customized ROMs also called?

Solution:

Which logic gates are ideal for checking the parity of binary numbers?

Solution:

The main memory implemented using semiconductor chips is

Solution:

What is the other name for an UP-DOWN counter?

Solution:

Represent the Boolean function, f (A,B,C) = A + ABC, in terms of its minterms:

Solution:

The codes in which each successive code word differs from the preceding one in only one bit position are called

Solution:

Which of the following Boolean expressions can be directly written from the truth table?

Solution:

Which of the following digital logic circuits can be used to add more than 1 – bit simultaneously?

Solution:

Solution:

Solution:

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