4.3 Bit Manipulation Cambridge iAS 9618

What does a left binary shift by one position do?

• It multiplies the number by 2

• It divides the number by 2

• It inverts all bits

• It shifts the number in a circular manner

What does a right binary shift by one position do?

• It divides the number by 2 (ignoring remainders)

• It multiplies the number by 2

• It swaps the bits in pairs

• It converts the number to hexadecimal

What is a logical shift?

• A shift that moves bits left or right and fills the empty positions with zeros

• A shift that maintains the sign bit when shifting right

• A shift that rotates bits in a circular manner

• A shift that multiplies by 4

What is an arithmetic shift?

• A shift that preserves the sign bit when shifting right

• A shift that replaces empty positions with zeros

• A shift that rotates bits in a circular manner

• A shift that doubles a number

What is a cyclic shift?

• A shift that rotates the bits, moving the last bit to the front or vice versa

• A shift that always inserts zeros in the empty bit positions

• A shift that is only used for multiplication

• A shift that only affects signed numbers

What happens when a left shift is applied twice to the binary number 00001101?

• The number is multiplied by 4

• The number is divided by 4

• The number remains unchanged

• The number is inverted

What does a right arithmetic shift do?

• It preserves the sign bit while shifting all other bits right

• It fills the empty bit positions with ones

• It performs a circular shift of bits

• It ignores the sign bit and inserts zeros

In device control, how can bit manipulation be used?

• It allows setting or clearing specific bits to turn components on or off

• It compresses data for transmission

• It converts decimal values into binary

• It only works for monitoring, not control

How can bit manipulation be used for device monitoring?

• It can be used to check specific bits to determine sensor status

• It replaces hardware components with software

• It performs automatic debugging

• It converts digital data into analog

What is bit masking?

• A technique used to test, set, or clear specific bits in a binary number

• A technique used to shift bits cyclically

• A technique used to add two binary numbers

• A technique used to encode characters