Ch 04: Bit Manipulation and Shifts

Covers bitwise logic manipulations, clearing/setting/toggling specific bits, arithmetic vs logical shifts, fast multiplication and division algorithms by powers of 2, and extended-precision math.

198 Questions198 MCQs0 Short Questions0 Long Questions

🎯 Exam Practice Papers

CS401 - Computer Architecture and Assembly Language Programming Examination Practice

Timed practice exam simulation for CS401 - Computer Architecture and Assembly Language Programming.

Showing 131 – 140 of 198 Questions

Page 14 of 20

Q131

❓ MCQ📘 CS401📑 Lec 4🏷️ Bitwise Rotation Instructions (RCR)Medium🔁⭐💡📄🎓VU🏛️VU

In a Rotate Through Carry Right (RCR) instruction applied to a 16-bit word, how many total bits form the rotation ring?

💻 assembly Snippet

rcr ax, 1

A.16 bits rotation
B.1 bit rotation
C.17 bits rotation
D.8 bits rotation

Q132

❓ MCQ📘 CS401📑 Lec 4🏷️ Bitwise Shift Operations (SHR) and DivisionEasy🔁⭐💡📄🎓VU🏛️VU

Suppose register AL contains the decimal value 35. What decimal value will AL hold after performing a bitwise logical right shift by one place (SHR AL, 1)?

💻 assembly Snippet

mov al, 35
shr al, 1

A.35
B.70
C.140
D.17

Q133

❓ MCQ📘 CS401📑 Lec 4🏷️ Bitwise Shift Operations (SHR) and Integer DivisionEasy🔁⭐💡📄🎓VU🏛️VU

Suppose register BL contains the decimal value 5. What decimal value will BL hold after executing a single bitwise logical right shift (SHR BL, 1)?

💻 assembly Snippet

mov bl, 5
shr bl, 1

A.3
B.2
C.5
D.10

Q134

❓ MCQ📘 CS401📑 Lec 4🏷️ Bitwise Shift Operations (SAR vs SHR)Medium🔁⭐💡📄🎓VU🏛️VU

What happens to the Most Significant Bit (MSB) of the destination operand after executing the SAR (Shift Arithmetic Right) instruction?

💻 assembly Snippet

mov al, 0x80
sar al, 1

A.The MSB is replaced by a 0
B.The MSB is replaced by a 1
C.The MSB retains its original value (sign extension)
D.The MSB is replaced by the value of the Carry Flag

Q135

❓ MCQ📘 CS401📑 Lec 4🏷️ Unsigned Division (DIV) Instruction FormsMedium🔁⭐💡📄🎓VU🏛️VU

How many basic operand forms does the unsigned division instruction (DIV) support in 8088 assembly language based on operand size?

💻 assembly Snippet

div bl
div bx

A.Two forms
B.Three forms
C.Four forms
D.One form

Q136

❓ MCQ📘 CS401📑 Lec 4🏷️ Unsigned Division (DIV) Operand RulesMedium🔁⭐💡📄🎓VU🏛️VU

When the operand of a DIV instruction is 16 bits wide, what is the bit-width of the implied dividend?

💻 assembly Snippet

div bx

A.8 bits
B.16 bits
C.32 bits
D.64 bits

Q137

❓ MCQ📘 CS401📑 Lec 4🏷️ Divide Overflow Exception and INT 0Medium🔁⭐💡📄🎓VU🏛️VU

What condition occurs when a division operation produces a quotient that is too large to fit in the destination register?

💻 assembly Snippet

mov ax, 1000
mov bl, 1
div bl

A.Divide logical error
B.Divide overflow error
C.Divide syntax error
D.An illegal instruction

Q138

❓ MCQ📘 CS401📑 Lec 4🏷️ Bitwise Shift Operations (SHL) and MultiplicationEasy🔁⭐💡📄🎓VU🏛️VU

Suppose decimal number 35 is converted to binary and shifted left by two bit positions (35 << 2). What will be the resulting decimal value?

💻 assembly Snippet

mov al, 35
shl al, 2

A.35
B.70
C.140
D.17

Q139

❓ MCQ📘 CS401📑 Lec 4🏷️ Logical Right Shift (SHR) MechanicsMedium🔁⭐💡📄🎓VU🏛️VU

Examine the bit shift operation: 0 -> [1 1 0 1 0 0 0] -> C (where 0 enters the MSB and the LSB exits into the Carry Flag). Which assembly instruction performs this operation?

💻 assembly Snippet

0 -> [1 1 0 1 0 0 0] -> C

A.SHL (Shift Logical Left)
B.SAR (Shift Arithmetic Right)
C.SHR (Shift Logical Right)
D.SAL (Shift Arithmetic Left)

Q140

❓ MCQ📘 CS401📑 Lec 4🏷️ Logical Left Shift (SHL) MechanicsMedium🔁⭐💡📄🎓VU🏛️VU

Examine the bit shift operation: C <- [1 1 0 1 0 0 0] <- 0 (where the MSB exits into the Carry Flag and 0 enters the LSB). Which assembly instruction performs this operation?

💻 assembly Snippet

C <- [1 1 0 1 0 0 0] <- 0

A.SHL (Shift Logical Left)
B.SAR (Shift Arithmetic Right)
C.SHR (Shift Logical Right)
D.SAL (Shift Arithmetic Left)

Ch 04: Bit Manipulation and Shifts

CS401 - Computer Architecture and Assembly Language Programming Examination Practice

Mid Term Examination

Final Term Examination

CS401 - Computer Architecture and Assembly Language Programming Examination Practice

Mid Term Examination

Final Term Examination

📖 Related CS401 - Computer Architecture and Assembly Language Programming Curriculum Units