Computer Organization Test Revision

Which of the following is the correct Boolean expression for this circuit?

• (A AND B) OR (X AND Y) = Z

• NOT (A AND B) = Z

• (NOT X) OR (NOT Y) = Z

• (NOT A) AND (NOT B) = Z

Which of the truth tables shown below, accurately represents this logic circuit?

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• 
• 
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How many of the following Boolean expressions correctly represent the diagram shown? (Choose as many as are appropriate)

• X = (A AND C) OR B

• X = (A OR B) AND NOT C

• X = (A AND B) OR C

• X = (NOT C) AND (A OR B)

Which of the following is the correct truth table for the Boolean expression shown here:

• 
• 
• 
• 

In A or B and C what operation occurs first?

• A or B

• B and C

• Both simultaneously

Which register is being described?

Holds the memory address about to be used by the CPU

• MAR

• MDR

• Accumulator

• Program Counter

Which register is being described?

Holds the data / instructions that have been fetched from memory

• MAR

• MDR

• Accumulator

• Program Counter

Which register is being described?

Holds the memory address of the instruction for each cycle

• MAR

• MDR

• Accumulator

• Program Counter

Which statement is TRUE?

• Registers are super fast memory, stores tiny instructions which can be accessed by the CPU quickly

• Registers are super fast memory, stores lots of instructions which can be accessed by the CPU slowly

• Registers are a type of primary memory which is used to access the state of the control unit

What part of the CPU is being described.

Very fast memory which stores regularly used instructions. CPU can access instructions held here quicker than from RAM

• ALU

• Control Unit

• Cache