Understanding Logical and Arithmetic Shifts

What is a logical shift in computer science?

• A shift operation that preserves the sign bit

• A shift operation that moves bits to the left or right, filling the vacated bit positions with zeros

• A shift operation that multiplies or divides a number by two

• A shift operation that rotates bits around

What is an arithmetic shift in computer science?

• A shift operation that moves bits to the left or right, preserving the sign bit

• A shift operation that fills vacated bit positions with zeros

• A shift operation that rotates bits around

• A shift operation that adds two numbers

Which of the following is an application of logical shifts?

• Preserving the sign of a number during division

• Multiplying or dividing unsigned integers by powers of two

• Rotating bits in a circular fashion

• Adding two binary numbers

Which of the following is an application of arithmetic shifts?

• Multiplying or dividing signed integers by powers of two

• Filling vacated bit positions with zeros

• Rotating bits in a circular fashion

• Adding two binary numbers

What is a key difference between logical and arithmetic shifts?

• Logical shifts preserve the sign bit, while arithmetic shifts do not

• Arithmetic shifts fill vacated bit positions with zeros, while logical shifts preserve the sign bit

• Logical shifts fill vacated bit positions with zeros, while arithmetic shifts preserve the sign bit

• Both logical and arithmetic shifts fill vacated bit positions with ones

In which scenario would you use a logical shift instead of an arithmetic shift?

• When you need to preserve the sign of a number

• When working with unsigned integers

• When you need to rotate bits

• When adding two numbers

In which scenario would you use an arithmetic shift instead of a logical shift?

• When you need to preserve the sign of a number

• When working with unsigned integers

• When you need to rotate bits

• When adding two numbers

What happens to the vacated bit positions in a right logical shift?

• They are filled with ones

• They are filled with zeros

• They are left unchanged

• They are filled with random bits

What happens to the vacated bit positions in a right arithmetic shift?

• They are filled with ones

• They are filled with zeros

• They are filled with the sign bit

• They are filled with random bits

Which of the following best describes the effect of a left logical shift on a binary number?

• It divides the number by two

• It multiplies the number by two

• It adds one to the number

• It subtracts one from the number