6. For an 8-bit operand, specify the 8-bit mask and the logical operator to perform the following operations. Bit positions are numbered 7-0, left to right. a. Logical Operator: Logical Mask: b. Set all bits to 1. Logical Operator: C. Clear bits 5, 4, 3, and 2 to 0. All other bits remain unchanged. Logical Mask: d. Complement bits 2, 1, and O. All other bits remain unchanged. Logical Operator: Logical Mask: Set bits 7, 6, and 5 to 1. All other bits remain unchanged. Logical Operator: Logical Mask:

Database System Concepts
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Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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**Understanding Bitwise Operations for an 8-bit Operand**

When working with an 8-bit operand, specific operations can be performed using an 8-bit mask and a logical operator. The bit positions in the operand are numbered from 7 to 0, left to right. Below are examples of some operations and the corresponding logical operators and masks required.

**a. Setting all bits to 1:**
To set every bit in an 8-bit operand to 1, a logical OR or SET operation is typically used with a mask of 1s.

- **Logical Operator:** OR
- **Logical Mask:** 1111 1111  

**b. Clearing bits 5, 4, 3, and 2 to 0:**
To clear bits 5, 4, 3, and 2, a logical AND operation is used with a mask that has 0s at positions 5, 4, 3, and 2.

- **Logical Operator:** AND
- **Logical Mask:** 1100 0011  

**c. Complementing bits 2, 1, and 0:**
To flip the bits 2, 1, and 0 (complement operation), a logical XOR operation is used with a mask that has 1s at positions 2, 1, and 0.

- **Logical Operator:** XOR
- **Logical Mask:** 0000 0111  

**d. Setting bits 7, 6, and 5 to 1:**
To set bits 7, 6, and 5 to 1 without affecting other bits, a logical OR operation is used with a mask that has 1s at positions 7, 6, and 5.

- **Logical Operator:** OR
- **Logical Mask:** 1110 0000  

These bitwise operations allow for precise control over individual bits within an 8-bit operand, enabling various data manipulation tasks in computing and digital communication.
Transcribed Image Text:**Understanding Bitwise Operations for an 8-bit Operand** When working with an 8-bit operand, specific operations can be performed using an 8-bit mask and a logical operator. The bit positions in the operand are numbered from 7 to 0, left to right. Below are examples of some operations and the corresponding logical operators and masks required. **a. Setting all bits to 1:** To set every bit in an 8-bit operand to 1, a logical OR or SET operation is typically used with a mask of 1s. - **Logical Operator:** OR - **Logical Mask:** 1111 1111 **b. Clearing bits 5, 4, 3, and 2 to 0:** To clear bits 5, 4, 3, and 2, a logical AND operation is used with a mask that has 0s at positions 5, 4, 3, and 2. - **Logical Operator:** AND - **Logical Mask:** 1100 0011 **c. Complementing bits 2, 1, and 0:** To flip the bits 2, 1, and 0 (complement operation), a logical XOR operation is used with a mask that has 1s at positions 2, 1, and 0. - **Logical Operator:** XOR - **Logical Mask:** 0000 0111 **d. Setting bits 7, 6, and 5 to 1:** To set bits 7, 6, and 5 to 1 without affecting other bits, a logical OR operation is used with a mask that has 1s at positions 7, 6, and 5. - **Logical Operator:** OR - **Logical Mask:** 1110 0000 These bitwise operations allow for precise control over individual bits within an 8-bit operand, enabling various data manipulation tasks in computing and digital communication.
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