ESE EC 2018 Achiever Study Plan: Digital Circuits Quiz 2

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Question 1

What will be the arithmetic result of A+A?

• A1
• BB
• CA
• Dcomplement of A

Question 2

A computer employs RAM chips of 256 bytes and ROM chips of 1024 bytes. If the computer system needs 1 kB of RAM and 1 kB of ROM, then how many address lines are required to access the memory?

• A10
• B11
• C12
• D13

Question 3

What is the maximum input frequency limit of a 3-bit Ripple counter configured around flip-flops, with inherent propagation delay time t_pd = 50 ns?

• A6670 MHz
• B667 MHz
• C66.7 MHz
• D6.67 MHz

Question 4

On simplification of an expression,
Y=using Boolean algebra, the solution is

• A
• B
• C
• D

Question 5

Consider the following statements regarding registers and latches:
1). Registers are temporary storage devices, whereas latches are not.
2). A latch employs cross-coupled feedback connections.
3). A register stores a binary word, whereas a latch does not.
The correct statement(s) is/are.

• A1 only
• B2 only
• C1 and 3
• D2 and 3

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