EASA Part 66 : Digital Question9

Question Number. 12. A computer processor has within it. Option A. register, buffer, data bus. Option B. ALU, register, memory. Option C. ALU, control section, register.

Correct Answer is. ALU, control section, register. Explanation. NIL.

Question Number. 3. The CPU consists of. Option A. ALU, timing and control section, register. Option B. register and arithmetic logic unit only. Option C. register, timing and control section only.

Correct Answer is. ALU, timing and control section, register. Explanation. Aircraft Instruments and Integrated Systems EHJ Pallett Page 153 Basic CPU,. Aircraft Electricity and Electronics Eismin 5th Edition Page 145.

Question Number. 6. Where does the clock signal in a microprocessor come from?. Option A. ALU. Option B. Memory. Option C. Control unit.

Correct Answer is. Control unit. Explanation. Aircraft Instruments and Integrated Systems, Pallett. Page 153.

Question Number. 15. An ALU performs the following. Option A. Arithmetic, Logic, Branch and Move Operations. Option B. Input/Output operations, Arithmetic, Logic Functions. Option C. Arithmetic, Logic, Branch and Find Operations.

Correct Answer is. Input/Output operations, Arithmetic, Logic Functions. Explanation. NIL.

Question Number. 7. Where is the operating program for the CPU stored?. Option A. Control unit. Option B. ALU. Option C. Memory unit.

Correct Answer is. Memory unit. Explanation. Aircraft Instruments and Integrated Systems, Pallett. Page 153.

Question Number. 2. What is the purpose of the ALU?. Option A. To store data being used by the CPU. Option B. The part of the CPU unit where arithmetic & logic operations are carried out. Option C. To convert serial into parallel data.

Correct Answer is. The part of the CPU unit where arithmetic & logic operations are carried out. Explanation. Aircraft Electricity and Electronics, Eismin, 5th Edition Page 146.

Question Number. 1. What is the function of a status register in a microprocessor?. Option A. To indicate the status of the processor. Option B. In the ALU, to store the position of the program during an interrupt. Option C. To synchronize the clock pulse.

Correct Answer is. To indicate the status of the processor. Explanation. NIL. http://www.i-garden.org/docu/cecs/cs14.pdf

Question Number. 13. The arithmetic logic unit (ALU) in a central processor unit (CPU) carries out. Option A. addition, subtraction, multiplication and division. Option B. computations as instructed. Option C. timing and synchronisation.

Correct Answer is. addition, subtraction, multiplication and division. Explanation. NIL.

Question Number. 4. How is multiplication achieved in an ALU?. Option A. by addition. Option B. by subtraction. Option C. by coupling.

Correct Answer is. by addition. Explanation. NIL.

Question Number. 10. A clock pulse in processor equipment. Option A. is to synchronise everything. Option B. is used for the maintenance tests. Option C. is to give the correct timing when calculations are made.

Correct Answer is. is to synchronise everything. Explanation. NIL.

Question Number. 8. A priority encoder. Option A. outputs the highest input. Option B. outputs the selected input. Option C. outputs the lowest input.

Correct Answer is. outputs the highest input. Explanation. NIL.

Question Number. 11. In a computer, the code that fetches correct data and feeds it to the ALU is called. Option A. the instruction set. Option B. ARINC. Option C. the computer program.

Correct Answer is. the instruction set. Explanation. NIL. http://www.webopedia.com/TERM/I/instruction.html

Question Number. 14. The CPU requires a clock to determine. Option A. the number of bits on the highway. Option B. the speed of operation. Option C. the date and time.

Correct Answer is. the speed of operation. Explanation. NIL.

Question Number. 5. The smallest operation of a CPU is. Option A. the processor cycle. Option B. the processor sub-cycle. Option C. the time cycle.

Correct Answer is. the time cycle. Explanation. NIL.

Question Number. 9. The smallest operation possible in a computer is the. Option A. timing cycle. Option B. processor sub-cycle. Option C. processor cycle.

Correct Answer is. timing cycle. Explanation. Also known as the clock pulse.