Q1. The central processing unit
(A) is operated from the control panel
(B) controls all input,output and processing
(C) is controlled by input data as it enters the system
(D) is controlled by auxillary storage unit
Answer: controls all input,output and processing
Explanation:
Q2. Binary coded decimal(BCD) numbers express each decimal unit digits as
(A) binary digits
(B) digits and strings
(C) word
(D) nibble
Answer: nibble
Explanation:
Q3. Stored instructions and data in a digital computer consist of
(A) alphabets
(B) numerals
(C) bits
(D) characters
Answer: bits
Explanation:
Q4. Errors in computer results could be due to?
(A) encoding data
(B) transmission of data
(C) manipulation of data
(D) all of the above
Answer: all of the above
Explanation:
Q5. the frequency range for satellite communication is
(A) 1GHz to 30GHz
(B) 1MHz to 30MHz
(C) 1GHz to 3GHz
(D) 1MHz to 3MHz
Answer: 1GHz to 30GHz
Explanation:
Q6. The external system bus architecture is created using the architecture:
(A) Pascal
(B) Einstein
(C) Charles Babbage
(D) Von Neumann
Answer: Von Neumann
Explanation:
Q7. Retrieving the data in the stack is called:
(A) Pushing
(B) Adding
(C) Pulling
(D) Popping
Answer: Popping
Explanation:
Q8. Inputting the data in the stack is called:
(A) Pushing
(B) Adding
(C) Pulling
(D) Popping
Answer: Pushing
Explanation:
Q9. In 8085 stack pointer is
(A) 8 bit wide
(B) 16 bit wide
(C) 32 bit wide
(D) 64 bit wide
Answer: 16 bit wide
Explanation:
Q10. Which of the following is the flag used in 8085 processor?
(A) Sign
(B) Auxiliary
(C) Parity
(D) All of these
Answer: All of these
Explanation:
Q11. Average latency time of magnetic tape memory is of the order
(A) 1 seconds
(B) 1 ms
(C) 1us
(D) 1 second
Answer: 1 second
Explanation:
Q12. What is HLT instruction in 8085 processor?
(A) Processor enters into Halt-State and the buses are tri-stated
(B) Hardware interrupts state
(C) Software interrupts state
(D) Jump instruction
Answer: Processor enters into Halt-State and the buses are tri-stated
Explanation:
Q13. Which of the following is the Stack used in 8085?
(A) FIFO
(B) LIFO
(C) LILO
(D) MISO
Answer: LIFO
Explanation: LIFO (Last In First Out) stack is used in 8085. In this type of Stack the last stored information can be retrieved first.
Q14. In how many ways interrupts are classified in 8085?
(A) 1
(B) 2
(C) 3
(D) 5
Answer: 2
Explanation: In 8085 the interrupts are classified as Hardware and Software interrupts
Q15. How many addressing modes are there in 8085?
(A) 1
(B) 2
(C) 3
(D) 5
Answer: 5
Explanation: Immediate, Direct, Register, Register indirect, Implied addressing modes.
Q16. What is clock frequency for 8085?
(A) 1MHz
(B) 2MHz
(C) 3MHz
(D) 4MHz
Answer: 3MHz
Explanation: 3 MHz is the maximum clock frequency for 8085
Q17. How many interrupts are there in 8085?
(A) 10
(B) 13
(C) 16
(D) 40
Answer: 13
Explanation: Two types of interrupt hardware and software Hardware:RST7.5,RST6.5,RST5.5,TRAP, INTR software:-RST0, RST1, RST2, RST3, RST4, RST5, RST6, RST7
Q18. What is the RST for the TRAP in 8085?
(A) RST5.5
(B) RST4.5
(C) RST4
(D) RST0
Answer: RST4.5
Explanation:
Q19. Which of the following is hardware interrupts in 8085?
(A) RST5.5,
(B) INTR
(C) TRAP
(D) All of these
Answer: All of these
Explanation:
Q20. Which interrupt has highest priority in 8085?
(A) INTR
(B) TRAP
(C) RST6.5
(D) All has same priority
Answer: RST6.5
Explanation:
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