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MCQOPTIONS
This section includes 104 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Electronics knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
An asynchronous link between two computers uses the start - stop scheme, with one start bit and one stop bit, and a transmission rate of 48.8 kbits/s. What is the effective transmission rate as seen by the two computers? |
| A. | 480 bytes/s |
| B. | 488 bytes/s |
| C. | 4880 bytes/s |
| D. | 4800 bytes/s |
| Answer» D. 4800 bytes/s | |
| 52. |
In MS-Excel-2007, which of the following is found in the home tab Clipboard group? |
| A. | Sort and Filter |
| B. | Merge and Center |
| C. | Format Painter |
| D. | Conditional Formatting |
| Answer» D. Conditional Formatting | |
| 53. |
In MS-Office word short cut key 'Ctrl' + '=' ('Control' and '=' key pressed together) is used to _________ |
| A. | Create Sub-Script |
| B. | Create Super-Script |
| C. | Show Hidden Marks |
| D. | Increase Indent |
| Answer» B. Create Super-Script | |
| 54. |
From where the timing for each object in a presentation set? |
| A. | View → slide sorter |
| B. | Slide show → custom transition |
| C. | Slide show → slide transition |
| D. | Slide show → custom animation |
| Answer» E. | |
| 55. |
Consider Column-1 and Column-2:Column-1Column-2i.baidua. Social Networkingii. alibabab. E-mailiii. linkedinc. Search Engineiv. mozilla firefoxd. Online Shoppingv. airmaile. Web Browser Match of Column-1 and Column-2 is: |
| A. | i-d, ii-a, iii-c, iv-b, v-e |
| B. | i-c, ii-d, iii-a, iv-e, v-b |
| C. | i-e, ii-a, iii-b, iv-c, v-d |
| D. | i-c, ii-e, iii-b, iv-d, v-a |
| Answer» C. i-e, ii-a, iii-b, iv-c, v-d | |
| 56. |
In MS-PowerPoint shortcut key shift + F5 is used to: |
| A. | Start a slide show from the current slide |
| B. | Start the slide show from the first slide |
| C. | Close the running slide show |
| D. | Go back to first slide during running slide show |
| Answer» B. Start the slide show from the first slide | |
| 57. |
In MS-Excel 2007 highlighter and eraser options are found under _____ |
| A. | Data tab - Data tools group |
| B. | Review tab - Proofing grou |
| C. | Review tab - start inking group |
| D. | Page layout tab - Arrange group |
| Answer» D. Page layout tab - Arrange group | |
| 58. |
A hard disk has a rotational speed 6000 rpm. Its average latency time is |
| A. | 5 × 10-3 sec |
| B. | 0.05 sec |
| C. | 1 sec |
| D. | 0.5 sec |
| Answer» B. 0.05 sec | |
| 59. |
_________ is a challenge response mechanism to ensure that on the other side a person is responding and not a machine. |
| A. | O. T. P. |
| B. | Q. R. Code |
| C. | Captcha |
| D. | Bar Code |
| Answer» D. Bar Code | |
| 60. |
Polling is the process of pausing the normal sequence of instructions to cause the processor to execute a separate set of I/O instructions instead. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 61. |
During a memory read operation, the CPU fetches ________. |
| A. | a program instruction |
| B. | an address |
| C. | data |
| D. | all of the above |
| Answer» E. | |
| 62. |
The JNZ, JA, and LOOP instructions are all part of which type of instruction? |
| A. | Data transfer |
| B. | Arithmetic |
| C. | Bit manipulation |
| D. | Loops and jumps |
| Answer» E. | |
| 63. |
The Power PC can effectively execute up to ten instructions per clock cycle. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 64. |
The MOV, PUSH, and POP instructions are all part of which type of instruction? |
| A. | Data transfer |
| B. | Arithmetic |
| C. | Bit manipulation |
| D. | Loops and jumps |
| Answer» B. Arithmetic | |
| 65. |
Machine language is independent of the type of microprocessor in a computer system. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 66. |
Instructions that allow direct control of the processor's flags are called ________ instructions. |
| A. | data transfer |
| B. | arithmetic |
| C. | bit manipulation |
| D. | processor control |
| Answer» E. | |
| 67. |
The PCI bus is a good example of an external bus for personal computers. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 68. |
The original Pentium was the first CPU to feature separate data and instruction caches. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» B. | |
| 69. |
With interrupt-driven I/O, if two or more devices request service at the same time, ________. |
| A. | the device closest to the CPU gets priority |
| B. | the device that is fastest gets priority |
| C. | the device assigned the highest priority is serviced first |
| D. | the system is likely to crash |
| Answer» D. the system is likely to crash | |
| 70. |
Which of the following is not a jump instruction? |
| A. | JB (jump back) |
| B. | JA (jump above) |
| C. | JO (jump if overflow) |
| D. | JMP (unconditional jump) |
| Answer» B. JA (jump above) | |
| 71. |
Which of the following is not a computer functional block? |
| A. | Analog-to-digital converter |
| B. | Central-processing unit |
| C. | Memory |
| D. | Input/output ports |
| Answer» B. Central-processing unit | |
| 72. |
A 20-bit address bus can locate ________. |
| A. | 1,048,576 locations |
| B. | 2,097,152 locations |
| C. | 4,194,304 locations |
| D. | 8,388,608 locations |
| Answer» B. 2,097,152 locations | |
| 73. |
The first Intel microprocessor to contain on-board cache memory was the ________. |
| A. | 80386 |
| B. | 80486 |
| C. | Pentium |
| D. | Pentium Pro |
| Answer» C. Pentium | |
| 74. |
Contiguous sequences of bytes or words are called ________. |
| A. | data transfer |
| B. | arithmetic |
| C. | loops and jumps |
| D. | strings |
| Answer» E. | |
| 75. |
Which of the following was not a design improvement for the 8086/8088 over the 8085? |
| A. | Execution unit (EU) |
| B. | 16-bit data bus |
| C. | Arithmetic logic unit (ALU) |
| D. | Bus interface unit (BIU) |
| Answer» D. Bus interface unit (BIU) | |
| 76. |
Instructions for the 80X86 family are downward compatible. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 77. |
Polled I/O works best when ________. |
| A. | there are no priority considerations |
| B. | priority considerations are frequent |
| C. | the polling rate exceeds 1000 s |
| D. | the polling rate is below 1000 s |
| Answer» B. priority considerations are frequent | |
| 78. |
Which of the following is not an arithmetic instruction? |
| A. | INC (increment) |
| B. | CMP (compare) |
| C. | DEC (decrement) |
| D. | ROL (rotate left) |
| Answer» E. | |
| 79. |
A coprocessor is a microprocessor designed with a limited instruction set optimized to perform arithmetic operations very quickly. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 80. |
Chip designers are always trying to increase the clock speed. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 81. |
An example of a unidirectional bus in a microcomputer system is the ________. |
| A. | address bus |
| B. | data bus |
| C. | control bus |
| D. | all of the above |
| Answer» B. data bus | |
| 82. |
Which is not an operand? |
| A. | Variable |
| B. | Register |
| C. | Memory location |
| D. | Assembler |
| Answer» E. | |
| 83. |
The ADD, CMP, and MUL instructions are all part of which type of instruction? |
| A. | Data transfer |
| B. | Arithmetic |
| C. | Bit manipulation |
| D. | Loops and jumps |
| Answer» C. Bit manipulation | |
| 84. |
The Pentium can execute two instructions at once. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 85. |
The process of jointly establishing communication is called ________. |
| A. | DMA |
| B. | bidirectional addressing |
| C. | multiplexing |
| D. | handshaking |
| Answer» E. | |
| 86. |
Which is not part of the execution unit (EU)? |
| A. | Arithmetic logic unit (ALU) |
| B. | Clock |
| C. | General registers |
| D. | Flags |
| Answer» C. General registers | |
| 87. |
Which microprocessor has multiplexed data and address lines? |
| A. | 8086/8088 |
| B. | 80286 |
| C. | 80386 |
| D. | Pentium |
| Answer» B. 80286 | |
| 88. |
Which of the following is not a computer bus? |
| A. | Data bus |
| B. | Control bus |
| C. | Timer bus |
| D. | Address bus |
| Answer» D. Address bus | |
| 89. |
The Pentium microprocessor has a data bus of ________. |
| A. | 16 bits |
| B. | 32 bits |
| C. | 64 bits |
| D. | 128 bits |
| Answer» D. 128 bits | |
| 90. |
A mini-program that can be used repeatedly, but is programmed only once is called a(n) ________. |
| A. | string |
| B. | subroutine |
| C. | interrupt |
| D. | processor control |
| Answer» C. interrupt | |
| 91. |
A port can be ________. |
| A. | strictly for input |
| B. | strictly for output |
| C. | bidirectional |
| D. | all of the above |
| Answer» E. | |
| 92. |
Which of the following is not an 8086/8088 general-purpose register? |
| A. | Code segment (CS) |
| B. | Data segment (DS) |
| C. | Stack segment (SS) |
| D. | Address segment (AS) |
| Answer» E. | |
| 93. |
An interrupt method that requires the CPU to test each peripheral device in sequence is called ________. |
| A. | vectored I/O |
| B. | polled I/O |
| C. | programmed interrupt |
| D. | interrupt-driven I/O |
| Answer» C. programmed interrupt | |
| 94. |
What is occurring when two or more sources of data attempt to use the same bus? |
| A. | Bus contention |
| B. | Direct memory access |
| C. | Bus interruption |
| D. | PPI |
| Answer» B. Direct memory access | |
| 95. |
A mnemonic is an English-like instruction that is converted by an assembler into a machine code for use by a processor. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» B. | |
| 96. |
Which of the following is not an enhancement to the Pentium that was unavailable in the 8086/8088? |
| A. | "Pipelined" architecture |
| B. | Expansion of cache memory |
| C. | Inclusion of an internal math coprocessor |
| D. | Data/address line multiplexing |
| Answer» E. | |
| 97. |
The first microprocessor had a(n)________. |
| A. | 1-bit data bus |
| B. | 2-bit data bus |
| C. | 4-bit data bus |
| D. | 8-bit data bus |
| Answer» D. 8-bit data bus | |
| 98. |
DMA is particularly suited for data transfer between the ________. |
| A. | disk drive and CPU |
| B. | disk drive and RAM |
| C. | disk drive and ROM |
| D. | disk drive and I/O |
| Answer» C. disk drive and ROM | |
| 99. |
Which bus is bidirectional? |
| A. | Address bus |
| B. | Control bus |
| C. | Data bus |
| D. | None of the above |
| Answer» D. None of the above | |
| 100. |
The Pentium can address ________. |
| A. | 1 MB |
| B. | 1 GB |
| C. | 2 GB |
| D. | 4 GB |
| Answer» E. | |