MCQOPTIONS
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MCQOPTIONS
This section includes 287 Mcqs, each offering curated multiple-choice questions to sharpen your Computer Science knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
Which of the following TTL subfamily is the fastest |
| A. | standard TTL |
| B. | high-speed TTL |
| C. | schottky TTL |
| D. | low-speed TTL |
| Answer» D. low-speed TTL | |
| 202. |
The binary number 1100 0101 has _____ bytes |
| A. | 1 |
| B. | 2 |
| C. | 4 |
| D. | 8 |
| Answer» B. 2 | |
| 203. |
Addition of 102 and 112 is |
| A. | 1002 |
| B. | 1012 |
| C. | 1112 |
| D. | 1102 |
| Answer» C. 1112 | |
| 204. |
Conversion of decimal number 7110 to it's binary number equivalent is |
| A. | 1100112 |
| B. | 11100112 |
| C. | 1100112 |
| D. | 10001112 |
| Answer» E. | |
| 205. |
Conversion of 10110112 to it's decimal equivalent is |
| A. | 8110 |
| B. | 9110 |
| C. | 10010 |
| D. | 20010 |
| Answer» C. 10010 | |
| 206. |
How many outputs signals can a gate have? |
| A. | one |
| B. | more than one |
| C. | two only |
| D. | both (a) and (b) |
| Answer» B. more than one | |
| 207. |
The functional capacity for LSI devices is |
| A. | 1 to 11 gates |
| B. | 12 to 99 gates |
| C. | 100 to 10,000 gates |
| D. | more than 10,000 gates |
| Answer» D. more than 10,000 gates | |
| 208. |
A flip-flop is a _____ element that stores a binary digit as a low or high voltage. |
| A. | chip |
| B. | bus |
| C. | I/O |
| D. | memory |
| Answer» E. | |
| 209. |
The 2764 is 65,536-bit EPROM organized as 8,192 words of 8 bits each. How many address lines does it have? |
| A. | 12 |
| B. | 14 |
| C. | 13 |
| D. | 8 |
| Answer» D. 8 | |
| 210. |
A half-adder adds _____ bits |
| A. | 16 |
| B. | 8 |
| C. | 10 |
| D. | 2 |
| Answer» E. | |
| 211. |
A _____ TTL device can sink up to 16mA and can source up to 400 MA. |
| A. | Low-power |
| B. | high-power |
| C. | Standard |
| D. | Schottky |
| Answer» D. Schottky | |
| 212. |
What logic function is obtained by adding an inverter to the inputs of an AND gate? |
| A. | OR |
| B. | NAND |
| C. | XOR |
| D. | NOR |
| Answer» E. | |
| 213. |
A combinational logic circuit which is used when it is desired to send data from two or more source through a single transmission line is known as |
| A. | encoder |
| B. | decoder |
| C. | multiplexer |
| D. | demultiplexer |
| Answer» D. demultiplexer | |
| 214. |
Binary-Coded-decimal (BCD) numbers express each digit as a _____ |
| A. | byte |
| B. | nibble |
| C. | bit |
| D. | All of the above |
| Answer» C. bit | |
| 215. |
ASCII and EBCDIC differ in |
| A. | their efficiency in storing data |
| B. | the random and sequential access method |
| C. | the number of bytes used to store characters |
| D. | their collecting sequences |
| Answer» E. | |
| 216. |
_____dominates the LSI field, and _____ is used extensively where lowest power consumption is necessary. |
| A. | NMOS, PMOS |
| B. | PMOS, CMOS |
| C. | NMOS, CMOS |
| D. | MOSFET, PMOS |
| Answer» D. MOSFET, PMOS | |
| 217. |
The hexadecimal number system is widely used in analyzing and programming ______ |
| A. | registers |
| B. | chips |
| C. | microprocessors |
| D. | vacuum tube |
| Answer» D. vacuum tube | |
| 218. |
What logic function is produced by adding an inverter to the output of an AND gate? |
| A. | NAND |
| B. | NOR |
| C. | XOR |
| D. | OR |
| Answer» B. NOR | |
| 219. |
Conversion of decimal number 6710 to it's octal number equivalent is |
| A. | 1008 |
| B. | 1038 |
| C. | 1098 |
| D. | 998 |
| Answer» C. 1098 | |
| 220. |
What does 4k represent? |
| A. | 4000 |
| B. | 4096 |
| C. | 40 |
| D. | 400 |
| Answer» C. 40 | |
| 221. |
Which of the following is not functionally a complete set? |
| A. | AND, OR |
| B. | NAND |
| C. | NOR |
| D. | AND, OR, NOT |
| Answer» B. NAND | |
| 222. |
Conversion of binary number 10100002 to an octal number is |
| A. | 1198 |
| B. | 1018 |
| C. | 1118 |
| D. | 1208 |
| Answer» E. | |
| 223. |
The time required for a pulse to decrease from 90 to 10 percent of its maximum value is known as |
| A. | rise time |
| B. | decay time |
| C. | binary level transition period |
| D. | propagation delay |
| Answer» C. binary level transition period | |
| 224. |
The functional capacity of SSI devices is |
| A. | 1 to 11 gates |
| B. | 12 to 99 gates |
| C. | 100 to 10,000 gates |
| D. | more than 10,000 gates |
| Answer» B. 12 to 99 gates | |
| 225. |
Conversion of binary number 1000112 to an octal number is |
| A. | 438 |
| B. | 478 |
| C. | 498 |
| D. | 508 |
| Answer» B. 478 | |
| 226. |
An OR gate has 6 inputs. How many input words are in its truth table? |
| A. | 64 |
| B. | 32 |
| C. | 16 |
| D. | 128 |
| Answer» B. 32 | |
| 227. |
Which function positive logic is equivalent to OR function in negative logic? |
| A. | NOT |
| B. | AND |
| C. | OR |
| D. | NOR |
| Answer» C. OR | |
| 228. |
With a NAND latch a low R and a low S produce a _____ condition. |
| A. | race |
| B. | set |
| C. | reset |
| D. | no change |
| Answer» B. set | |
| 229. |
Which TTL sub-family has maximum speed? |
| A. | standard TTL |
| B. | schottky-clamped TTL |
| C. | high speed TTL |
| D. | low power TTL |
| Answer» C. high speed TTL | |
| 230. |
Which of the following logic families has the highest noise immunity? |
| A. | RTL |
| B. | DTL |
| C. | TTL |
| D. | HTL |
| Answer» E. | |
| 231. |
Which of the following is a universal gate? |
| A. | AND |
| B. | OR |
| C. | EX-OR |
| D. | NAND |
| Answer» E. | |
| 232. |
Convert the 1000 0000 0000 1111 signed binary number to decimal number. |
| A. | 15 |
| B. | -15 |
| C. | -30 |
| D. | 30 |
| Answer» C. -30 | |
| 233. |
A positive AND gate is also a negative |
| A. | NAND gate |
| B. | NOR gate |
| C. | AND gate |
| D. | OR gate |
| Answer» E. | |
| 234. |
Conversion of binary number 1011012 to hexadecimal is |
| A. | 3716 |
| B. | 2D16 |
| C. | 20000000000000000 |
| D. | 2716 |
| Answer» C. 20000000000000000 | |
| 235. |
The m-bit parallel adder consists of: |
| A. | (m+1) full adders |
| B. | m/2 full adders |
| C. | m-1 full adders |
| D. | m full adders |
| Answer» E. | |
| 236. |
The memory cell of a dynamic RAM is simpler and smaller than the memory cell of a _____ RAM. |
| A. | volatile |
| B. | static |
| C. | semiconductor |
| D. | bipolar |
| Answer» C. semiconductor | |
| 237. |
The hexadecimal digits are 0 to 9 and A to _____ |
| A. | E |
| B. | F |
| C. | G |
| D. | D |
| Answer» C. G | |
| 238. |
Conversion of binary number 1010000101112 to hexadecimal number is |
| A. | D8F916 |
| B. | A8B916 |
| C. | A1716 |
| D. | D9F816 |
| Answer» D. D9F816 | |
| 239. |
The output 0 and 1 levels for TTL logic family is approximately |
| A. | 0.1 and 5 V |
| B. | 0.6 and 3.5 V |
| C. | 0.9 and 1.75V |
| D. | -1.75 and -0.9 V |
| Answer» C. 0.9 and 1.75V | |
| 240. |
Conversion of decimal number 4210 to it's octal number equivalent is |
| A. | 578 |
| B. | 428 |
| C. | 478 |
| D. | 528 |
| Answer» E. | |
| 241. |
Conversion of an octal number 1348 to a binary number is |
| A. | 10110112 |
| B. | 11011002 |
| C. | 10111002 |
| D. | 1100112 |
| Answer» D. 1100112 | |
| 242. |
What is the 2's-complement representation of -24 in a 16-bit microcomputer? |
| A. | 0000 0000 0001 1000 |
| B. | 1111 1111 1110 0111 |
| C. | 1111 1111 1110 1000 |
| D. | 0001 0001 1111 0011 |
| Answer» D. 0001 0001 1111 0011 | |
| 243. |
The _____ is ultraviolet-light-erasable and electrically programmable. This allows the user to erase and store until programs and data are perfected. |
| A. | EPROM |
| B. | ROM |
| C. | PROM |
| D. | RAM |
| Answer» B. ROM | |
| 244. |
The maximum number of TTL loads that a TTL device can drive reliably over the specified temperature range is |
| A. | fanout |
| B. | bipolar |
| C. | chip |
| D. | universal logic circuit |
| Answer» B. bipolar | |
| 245. |
In which code the successive code characters differ in only one bit position? |
| A. | gray code |
| B. | excess 3 code |
| C. | 8421 code |
| D. | algebraic code |
| Answer» B. excess 3 code | |
| 246. |
An OR gate has 6 inputs. What is the only input word that produces a 0 output? |
| A. | 0 |
| B. | 111 |
| C. | 111000 |
| D. | 111111 |
| Answer» B. 111 | |
| 247. |
Conversion of binary number 10010102 to to its decimal number is |
| A. | 7410 |
| B. | 9710 |
| C. | 7210 |
| D. | 6310 |
| Answer» B. 9710 | |
| 248. |
_____ has become the most widely used bipolar family. |
| A. | DTL |
| B. | TTL |
| C. | ECL |
| D. | MOS |
| Answer» C. ECL | |
| 249. |
A diagram that illustrates the ore (Logic) of functions in a progran called a |
| A. | Flowchart |
| B. | Sequence of steps |
| C. | Direction of flow |
| D. | All of the above |
| Answer» B. Sequence of steps | |
| 250. |
What logic function is produced by adding an inverter to each input and the output of an AND gate? |
| A. | NAND |
| B. | NOR |
| C. | OR |
| D. | XOR |
| Answer» D. XOR | |