DDCO QUIZ

In a 4-variable K-map, how many cells represent minterms?

• 8
  

• 16

• 32
  

• 64

What is the output of a D Flip-Flop when the input is ‘1’ and a clock pulse is applied?

• 0
  

• 1

• High Impedance
  

• No change

Which of the following is not a valid addressing mode?

• Immediate
  

• Indexed
  

• Logical
  

• Register

What is the primary purpose of cache memory?

• Increase main memory size
  

• Reduce latency

• Store backup data
  

• Reduce cost

DMA transfers are controlled by:

• CPU
  

• I/O Devices
  

• Memory Controller
  

• DMA Controller

Which operation is performed first in an instruction cycle?

• Fetch
  

• Decode
  

• Execute
  

• Write Back

What is the main advantage of using NAND gates for implementation?

• Low power consumption
  

• Universality
  

• Speed

• High input count

The primary function of a multiplexer is:

• Data selection
  

• Data storage
  

• Data amplification
  

• Data inversion
  

In a 3-to-8 decoder, how many inputs and outputs are present?

• 2 inputs, 4 outputs
  

• 3 inputs, 8 outputs
  

• 4 inputs, 16 outputs
  

• 3 inputs, 16 output

A flip-flop operates in the:

• Asynchronous mode only
  

• Synchronous mode only
  

• Both asynchronous and synchronous modes
  

• Neither asynchronous nor synchronous mode