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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Write the summary of division of unsigned numbers. |
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Answer» In the division of unsigned numbers 8051 supports byte over byte only. DIV AB, after division quotient is in A and remainder in B.
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| 2. |
Briefly explain signed and unsigned subprogram. |
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Answer» Subtraction of unsigned numbers: In 8051 SUBB is used to subtract two numbers by using unsigned representation by setting the bit CY = 0 or CY = 1. Whereas, in signed representation the sum or difference should not be greater than or less than -128 or 127. |
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| 3. |
What is a Stack pointer? |
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Answer» Stack is the area of the memory (RAM) that is used in some instructions to store and retrieve data quickly. Stack pointer is used to hold an internal RAM address. When a program jumps to some branch the address of the next instruction is stored in Stack. |
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| 4. |
Write the direct address of the Accumulator. |
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Answer» The direct address of accumulator register is OEO. |
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| 5. |
What is a Program Counter? |
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Answer» Program counter is a circuit, which holds the address of a byte in memory. It also specifies the address of the next instruction to be fetched and executed. |
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| 6. |
What is an Accumulator? |
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Answer» Accumulator is a device which stores a number and which on receipt of another number, adds the two and stores the sum. It can also sense the signal, clear and complement etc. |
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| 7. |
What is a microcontroller? |
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Answer» Microcontroller is a small computer on a single IC consisting of a relatively simple CPU combined with support functions. |
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