MCQOPTIONS
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MCQOPTIONS
This section includes 164 Mcqs, each offering curated multiple-choice questions to sharpen your Bachelor of Sc in Computer Science FY knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
If MN/MX is low the 8086 operates in __________ mode |
| A. | minimum |
| B. | maximum |
| C. | both (a) and (b) |
| D. | medium |
| Answer» C. both (a) and (b) | |
| 52. |
In a minimum mode there is a ___________ on the system bus |
| A. | single |
| B. | double |
| C. | multiple |
| D. | triple |
| Answer» B. double | |
| 53. |
The RD, WR, M/IO is the heart of control for a __________ mode |
| A. | minimum |
| B. | maximum |
| C. | compatibility mode |
| D. | control mode |
| Answer» B. maximum | |
| 54. |
The functions of Pins from 24 to 31 depend on the mode in which _______ is operating |
| A. | 8085 |
| B. | 8086 |
| C. | 80835 |
| D. | 80845 |
| Answer» C. 80835 | |
| 55. |
________ is used to write into memory |
| A. | rd |
| B. | wr |
| C. | rd / wr |
| D. | clk |
| Answer» C. rd / wr | |
| 56. |
The address bits are sent out on lines through __________ |
| A. | a16-19 |
| B. | a0-17 |
| C. | d0-d17 |
| D. | c0-c17 |
| Answer» B. a0-17 | |
| 57. |
The pin of minimum mode AD0- AD15 has _________ data bus |
| A. | 4 bit |
| B. | 20 bit |
| C. | 16 bit |
| D. | 32 bit |
| Answer» D. 32 bit | |
| 58. |
The pin of minimum mode AD0-AD15 has ____________ address |
| A. | 16 bit |
| B. | 20 bit |
| C. | 32 bit |
| D. | 4 bit |
| Answer» C. 32 bit | |
| 59. |
Signal |
| A. | ur signal |
| B. | vcc |
| C. | aie |
| D. | ground |
| Answer» B. vcc | |
| 60. |
The BIU contains FIFO register of size 6 bytes called _____. |
| A. | queue |
| B. | stack |
| C. | segment |
| D. | register |
| Answer» B. stack | |
| 61. |
The 8086 fetches instruction one after another from __________ of memory |
| A. | code segment |
| B. | ip |
| C. | es |
| D. | ss |
| Answer» B. ip | |
| 62. |
The _______ contains an offset instead of actual address |
| A. | sp |
| B. | ip |
| C. | es |
| D. | ss |
| Answer» C. es | |
| 63. |
The LES copies to words from memory to register and __________ |
| A. | ds |
| B. | cs |
| C. | es |
| D. | ds |
| Answer» D. ds | |
| 64. |
The conditional branch instruction specify ___________ for branching |
| A. | conditions |
| B. | instruction |
| C. | address |
| D. | memory |
| Answer» B. instruction | |
| 65. |
The _________ translates a byte from one code to another code |
| A. | xlat |
| B. | xchng |
| C. | pop |
| D. | push |
| Answer» B. xchng | |
| 66. |
_________destination inverts each bit of destination |
| A. | not |
| B. | nor |
| C. | and |
| D. | or |
| Answer» B. nor | |
| 67. |
Instruction providing both segment base and offset address are called _____ |
| A. | below type . |
| B. | far type |
| C. | low type |
| D. | high type |
| Answer» C. low type | |
| 68. |
The JS is called as ______ |
| A. | jump the signed bit |
| B. | jump single bit |
| C. | jump simple bit |
| D. | jump signal it |
| Answer» B. jump single bit | |
| 69. |
IMUL source is a signed _________ |
| A. | multiplication |
| B. | addition |
| C. | subtraction |
| D. | division |
| Answer» B. addition | |
| 70. |
INC destination increments the content of destination by _______ |
| A. | 1 |
| B. | 2 |
| C. | 30 |
| D. | 41 |
| Answer» B. 2 | |
| 71. |
LDs copies to consecutive words from memory to register and ___________ |
| A. | es |
| B. | ds |
| C. | ss |
| D. | cs |
| Answer» C. ss | |
| 72. |
The push source copies a word from source to ______ |
| A. | stack |
| B. | memory |
| C. | register |
| D. | destination |
| Answer» B. memory | |
| 73. |
The IP is ________ bits in length |
| A. | 8 bits |
| B. | 4 bits |
| C. | 16 bits |
| D. | 32 bits |
| Answer» D. 32 bits | |
| 74. |
The CS register stores instruction _____________ in code segment |
| A. | stream |
| B. | path |
| C. | codes |
| D. | stream line |
| Answer» D. stream line | |
| 75. |
The DS is called as _______ |
| A. | data segment |
| B. | digital segment |
| C. | divide segment |
| D. | decode segment |
| Answer» B. digital segment | |
| 76. |
The 1 MB byte of memory can be divided into ______ segment |
| A. | 1 kbyte |
| B. | 64 kbyte |
| C. | 33 kbyte |
| D. | 34 kbyte |
| Answer» C. 33 kbyte | |
| 77. |
The BIU prefetches the instruction from memory and store them in ________ |
| A. | queue |
| B. | register |
| C. | memory |
| D. | stack |
| Answer» B. register | |
| 78. |
The BIU contains FIFO register of size __________ bytes |
| A. | 8 |
| B. | 6 |
| C. | 4 |
| D. | 12 |
| Answer» C. 4 | |
| 79. |
The index register are used to hold _______ |
| A. | memory register |
| B. | offset address |
| C. | segment memory |
| D. | offset memory |
| Answer» B. offset address | |
| 80. |
The SS is called as ________ |
| A. | single stack |
| B. | stack segment |
| C. | sequence stack |
| D. | random stack |
| Answer» C. sequence stack | |
| 81. |
The BP is indicated by _______ |
| A. | base pointer |
| B. | binary pointer |
| C. | bit pointer |
| D. | digital pointer |
| Answer» B. binary pointer | |
| 82. |
The SP is indicated by ________ |
| A. | single pointer |
| B. | stack pointer |
| C. | source pointer |
| D. | destination pointer |
| Answer» C. source pointer | |
| 83. |
The register AX is formed by grouping ________ |
| A. | ah & al |
| B. | bh & bl |
| C. | ch & cl |
| D. | dh & dl |
| Answer» B. bh & bl | |
| 84. |
The IF is called as _________ |
| A. | initial flag |
| B. | indicate flag |
| C. | interrupt flag |
| D. | inter flag |
| Answer» D. inter flag | |
| 85. |
The OF is called as _______ |
| A. | overflow flag |
| B. | overdue flag |
| C. | one flag |
| D. | over flag |
| Answer» B. overdue flag | |
| 86. |
The SF is called as ________ |
| A. | service flag |
| B. | sign flag |
| C. | single flag |
| D. | condition flag |
| Answer» C. single flag | |
| 87. |
The CF is known as ________ |
| A. | carry flag |
| B. | condition flag |
| C. | common flag |
| D. | single flag |
| Answer» B. condition flag | |
| 88. |
The 16 bit flag of 8086 microprocessor is responsible to indicate ___________ |
| A. | the condition of result of alu operation |
| B. | the condition of memory |
| C. | the result of addition |
| D. | the result of subtraction |
| Answer» B. the condition of memory | |
| 89. |
The work of EU is ________ |
| A. | encoding |
| B. | decoding |
| C. | processing |
| D. | calculations |
| Answer» C. processing | |
| 90. |
The microprocessor can read/write 16 bit data from or to ________ |
| A. | memory |
| B. | i /o device |
| C. | processor |
| D. | register |
| Answer» B. i /o device | |
| 91. |
The intel 8086 microprocessor is a _______ processor |
| A. | 8 bit |
| B. | 16 bit |
| C. | 32 bit |
| D. | 4 bit |
| Answer» C. 32 bit | |
| 92. |
In 1960's texas institute invented ______ |
| A. | integrated circuits |
| B. | microprocessor |
| C. | vacuum tubes |
| D. | transistors |
| Answer» B. microprocessor | |
| 93. |
The first digital electronic computer was built in the year________ |
| A. | 1950 |
| B. | 1960 |
| C. | 1940 |
| D. | 1930 |
| Answer» D. 1930 | |
| 94. |
The purpose of the microprocessor is to control ______ |
| A. | memory |
| B. | switches |
| C. | processing |
| D. | tasks |
| Answer» B. switches | |
| 95. |
Microprocessor is the ______ of the computer and it perform all the computational tasks |
| A. | main |
| B. | heart |
| C. | important |
| D. | simple |
| Answer» C. important | |
| 96. |
Microprocessor is a/an _______ circuit that functions as the CPU of the compute |
| A. | electronic |
| B. | mechanic |
| C. | integrating |
| D. | processing |
| Answer» B. mechanic | |
| 97. |
A microprocessor is a _______ chip integrating all the functions of a CPU of a computer. |
| A. | multiple |
| B. | single |
| C. | double |
| D. | triple |
| Answer» C. double | |
| 98. |
Status register is also called as . |
| A. | accumulator |
| B. | stack |
| C. | counter |
| D. | flags |
| Answer» E. | |
| 99. |
The First Microprocessor was . |
| A. | intel 4004 |
| B. | 8080 |
| C. | 8085 |
| D. | 4008 |
| Answer» B. 8080 | |
| 100. |
Access time is faster for . |
| A. | rom |
| B. | sram |
| C. | dram |
| D. | eram |
| Answer» C. dram | |