|Board||Maharashtra State Council of Educational Research and Training|
|Class||Class 12th / HSC|
|Download||Question Bank With Answer Key|
|Stream||Arts, Commerce and Science|
|Subject||Computer Science (D9) Paper II|
Maharashtra HSC Computer Science II Question Bank
Maharashtra State Council of Educational Research and Training, Pune Class 12th/HSC Computer Science II Question Bank With Answer Key March 2021
Download HSC Computer Science II Question Bank
|Class & Subjects||Question Bank|
|Class XII Computer Science II
Maharashtra Class XII Computer Science II Sample Questions
1. The register which stores the result of arithmetic and logic operations is called as …………
i. Program counter
iii. Stack pointer
iv. D. Temporary register
2. Program counter in 8085 Microprocessor ……….
i. Counts number of programs
ii. Counts number of times a subroutine is called
iii. Counts the number of times loop are executed
iv. Points to the address of the next instruction to be executed
3. In Intel 8085 Microprocessor, ALE signal made high to…….
i. Enable AD0-AD7 bus to be used as lower order a. address bus
ii. Enable AD0-AD7 bus to be used as data bus (D0-D7)
iii. To halt the processor
iv. D. To reset the microprocessor
4. ………. is a non Vectored interrupt in 8085.
i. RST 7.5
ii. RST 6.5
5. ………….. is a lowest priority interrupt
i. RST 5.5
ii. RST 6.5
6. ………. is the only non- maskable interrupt
ii. RST 5.5
iii. RST 7.5
iv. RST 6.5
7. ………….. is not valid register pair in 8085 microprocessor
i. B C pair
ii. H L pair
iii. Accumulator and flag register
iv. D E pair
8 Which of the following statement for INTEL 8085 is correct?
i. Program counter specifies the address of the last instruction executed
ii. Program counter specifies the number of instructions executed so far
iii. Program counter specifies the address of the next instruction to be executed
iv. Program counter specifies the address of instruction being executed
9. Which of the following data transfer is not possible in 8085 microprocessor?
i. Memory to Accumulator
ii. Accumulator to memory
iii. Accumulator to I/O device
iv. Memory to memory
10. If the status of S0 and S1 pin is low, the microprocessor performs the ……………….
i. Reset operation
ii. Halt operation
iii. Hold operation
iv. Interrupt acknowledge
11 In 8085 microprocessor, the stack works on the principle of……
i. First in first out( FIFO)
ii. Last in last out( LILO)
iii. Last in first out( LIFO)
12 8085 requires …….Power supply
i. +5 V
ii. +15 V
iii. -5 V
13. The 8085 microprocessor can address …….. bytes of memory
iii. 128 k
14 In an Intel 8085 microprocessor, why is READY signal is used?
i. To indicate that microprocessor is working and is ready for use
ii. To provide proper WAIT states when the microprocessor is communicating with a slow peripheral device.
iii. To slow down a fast peripheral device so as to communicate at the microprocessor’s device.
iv. None of the above.
15 ALU (Arithmetic and Logic Unit ) of 8085 microprocessor consists of………..
i. Accumulator, temporary register, arithmetic and logic circuits
ii. Accumulator, arithmetic, logic circuits and five flags
iii. Accumulator, arithmetic and logic circuits
iv. Accumulator, temporary register, arithmetic, logic circuits and five flags
16 INTEL 8085 microprocessor was introduced in ……
17 The clock speed of 8085 microprocessor is …………
iii. 3 MHz
18 There are …………..general purpose registers in 8085 processor
19 ……..signal is used as the system clock for devices connected with the microprocessor.
ii. CLK OUT
iii. RESET OUT
20 In a flag register of 8085…………….. number of bits are unused
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