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Computer Science Engineering (CSE) Exam  >  Computer Science Engineering (CSE) Tests  >  Test: 8051 Instruction - Microprocessors And Microcontrollers - Computer Science Engineering (CSE) MCQ

Test: 8051 Instruction - Microprocessors And Microcontrollers - Computer Science Engineering (CSE) MCQ


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15 Questions MCQ Test - Test: 8051 Instruction - Microprocessors And Microcontrollers

Test: 8051 Instruction - Microprocessors And Microcontrollers for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Test: 8051 Instruction - Microprocessors And Microcontrollers questions and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus.The Test: 8051 Instruction - Microprocessors And Microcontrollers MCQs are made for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: 8051 Instruction - Microprocessors And Microcontrollers below.
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Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 1
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Which of the following is not an instruction of 8051 instructions?

Detailed Solution for Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 1

The 8051 instructions are categorised as
1. Data transfer instructions
2. Arithmetic instructions
3. Logical instructions
4. Boolean instructions
5. Control transfer instructions.

Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 2
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The operations performed by data transfer instructions are on

Detailed Solution for Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 2

The data transfer instructions implement a bit, byte, 16-bit data transfer operations between the SRC(source) and DST(destination) operands.

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Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 3
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Which of the following is true while executing data transfer instructions?

Detailed Solution for Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 3

 In data transfer instructions,
1. Program counter is not accessible.
2. Restricted bit-transfer operations are allowed.
3. Both operands can be direct/indirect register operands.
4. BOth operands can be internal direct data memory operands.

Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 4
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The logical instruction that affect the carry flag during its execution is
Detailed Solution for Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 4

The logical instructions that does not affect the carry flag are, ANL, ORL and XRL. The logical instructions that affect the carry flag during its execution are RL, RLC, RRC and RR.

Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 5
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The instruction that is used to complement or invert the bit of a bit addressable SFR is
Detailed Solution for Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 5

The instruction, CPL Bit is used to complement or invert the bit of a bit addressable SFR or RAM.

Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 6
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The instructions that change the sequence of execution are
Detailed Solution for Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 6

The control transfer instructions transfer the control of execution or change the sequence of execution conditionally or unconditionally.

Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 7
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The control transfer instructions are divided into
Detailed Solution for Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 7

The control transfer instructions are divided into conditional and unconditional control transfer instructions.

Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 8
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The conditional control transfer instructions check a bit condition which includes any bit of
Detailed Solution for Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 8

The conditional control transfer instructions check a bit condition which includes any bit of
a) bit addressable RAM
b) bit addressable SFRs
c) content of accumulator
d) all of the mentioned

Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 9
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The mnemonic used to perform a subtraction of source with an 8-bit data and jumps to specified relative address if subtraction is non-zero is
Detailed Solution for Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 9

The CJNE instruction perform a subtraction of source with an 8-bit data and jumps to specified relative address only if the result of the subtraction is non-zero, else continues to the next instruction.

Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 10
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The mnemonic, JNB is used to jump to the specified relative address only if
Detailed Solution for Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 10

The mnemonic, JNB is used to jump to the specified relative address only if specified bit=1, else continues to the next instruction.

Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 11
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The type of operand that is not allowed to use in boolean instructions of 8051 is
Detailed Solution for Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 11

 In boolean instructions, immediate bit is not allowed as an operand.

Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 12
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In boolean instructions, the flag that is the only allowed destination operand for two operand instructions is
Detailed Solution for Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 12

Carry flag(C) is the only allowed destination operand for two operand instructions in boolean instructions.

Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 13
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 If the most significant bit of relative address byte is 1, then the short jump instruction is
Detailed Solution for Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 13

 If the most significant bit of relative address byte is 1, then the short jump instruction is back jump, else it is considered as forward jump.

Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 14
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The first byte of an absolute jump instruction consists of
Detailed Solution for Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 14

The first byte of an absolute jump instruction consists of 5 LSBs of opcode and 3 MSBs of 11-bit address. The next byte carries the least significant 8 bits of the 11-bit address.

Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 15
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The absolute jump instruction is intended mainly for a jump within a memory space of
Detailed Solution for Test: 8051 Instruction - Microprocessors And Microcontrollers - Question 15

The absolute jump instruction is intended mainly for a jump within a memory space of 2 Kbytes.

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