Practice Program Status Word (PSW) - 1.3 | 1. Flags and Conditional Instructions | Computer Organisation and Architecture - Vol 2
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Knowledge

1.3 - Program Status Word (PSW)

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What does the Program Status Word (PSW) contain?

💡 Hint: Think about the components that are necessary for the CPU's state.

Question 2

Easy

Define a conditional instruction.

💡 Hint: Recall the if-then-else logic.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What is the role of the Program Status Word (PSW) in CPU operations?

  • It only stores the last executed instruction.
  • It maintains the CPU's state and aids in decision-making.
  • It serves as a backup for old program states.

💡 Hint: Think about why we need state information during program execution.

Question 2

True or False: The zero flag is set when the result of an operation is non-zero.

  • True
  • False

💡 Hint: Recall what the zero flag indicates.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

You have a program that calculates the sum of two numbers. Detail how you would use flags to determine if you should output the result or skip to a different instruction.

💡 Hint: Think about how the zero flag impacts decision-making in this context.

Question 2

Design a sequence of assembly instructions that demonstrates the use of the PSW during a function call and return.

💡 Hint: Make sure to include steps that save and restore the state.

Challenge and get performance evaluation