This is the Multiples Choice Questions Part 6 of the Series in Computer Fundamentals as one of the Electronics Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electronics Engineering field, Electronics Books, Journals and other Electronics References.

### MCQ Topic Outline included in ECE Board Exam Syllabi

- MCQ in analog and Digital System
- MCQ in Binary Number System
- MCQ in Boolean Algebra
- MCQ in Mathematical Logic and Switching Networks
- MCQ in Basic digital Circuits (logic gates, flip-flops, multivibrators, etc)
- MCQ in Static and dynamic Memory Devices
- MCQ in Programming and Machine Languages
- MCQ in Information and Acquisition Processing
- MCQ in Analog / Digital Conversion
- MCQ in Computer Networking

### Continue Practice Exam Test Questions Part 6 of the Series

**Choose the letter of the best answer in each questions.**

251. An English mathematician who invented the slide rule in 1622.

A. Blaise Pascal

B. Clifford Berry

C. Charges Babage

D. William Oughtred

Answer: **Option D**

Solution:

252. Built a computer in 1946 at the Institute of Advance Study (IAS), Princeton, USA, that uses binary numbers and stores information.

A. Vannevar Bush

B. John Van Neumann

C. John Atannasoff

D. Clifford Berry

Answer: **Option B**

Solution:

253. An electronic device design to accept data performs prescribed computational and logical operations at high speed and output the results of this operation.

A. Compiler

B. Simulator

C. Computer

D. Digital machine

Answer: **Option C**

Solution:

254. First commercial computer introduce in 1953 that uses valves.

A. IBM-1400

B. UNIVAC

C. IBM-701

D. ENIAC

Answer: **Option B**

Solution:

255. The first electronic computer and was completed in 1946.

A. ENIAC

B. UNIVAC

C. EDVAC

D. Whirlwind I

Answer: **Option A**

Solution:

256. ENIAC was developed at

A. University of Pennsylvania

B. Massachusetts Institute of Technology

C. Cambridge University

D. Bell Laboratories

Answer: **Option A**

Solution:

257. Who constructed ENIAC and UNIVAC?

A. William Oughtred

B. Presper Eckert and John W. Mauchly

C. John von Neumann

D. William Oughtred and Jon von Neumann

Answer: **Option B**

Solution:

258. ENIAC consist of how many vacuum tubes?

A. 1,500 tubes

B. 3,575 tubes

C. 13,575 tubes

D. 18,000 tubes

Answer: **Option D**

Solution:

259. ENIAC could perform _________ additions or up to _________ multiplications per second.

A. 1,000 / 100

B. 1,500 / 150

C. 3,000 / 300

D. 5,000 / 500

Answer: **Option D**

Solution:

260. Whirlwind I, develop at Massachusetts Institute of Technology is capable of _________ operations per second.

A. 1,000

B. 5,000

C. 10,000

D. 20,000

Answer: **Option D**

Solution:

261. Refers to the increased use of data conversion circuits as a result of increased application.

A. Op Amps

B. Linear circuit

C. Computers

D. Digital equipment

Answer: **Option C**

Solution:

262. What is a group of circuits that provides timing and signals to all operations in the computer?

A. Output unit

B. Memory unit

C. Control unit

D. Input unit

Answer: **Option C**

Solution:

263. Refers to the part of computer that performs mathematical operations.

A. CPU

B. Flip-flop

C. Assembly language

D. ALU

Answer: **Option D**

Solution:

264. What does ALU which carries arithmetic and logic operations process?

A. Binary coded decimal

B. Hexadecimal numbers

C. Octal numbers

D. Binary numbers

Answer: **Option D**

Solution:

265. What is the smallest part of a computer language?

A. binary

B. byte

C. bit

D. word

Answer: **Option C**

Solution:

266. A digital word consisting of only four bits is called a

A. dibit

B. quad

C. pixel

D. nibble

Answer: **Option D**

Solution:

267. Electronics methodology in solving application problems using circuits, in which there are only two possible voltage levels.

A. digital electronics

B. switching techniques

C. state diagramming

D. bistable electronics

Answer: **Option A**

Solution:

268. In digital electronics, there are mainly two possible voltage levels and these make _______ number system to be useful in its analysis.

A. binary

B. octal

C. hexadecimal

D. all of the above

Answer: **Option A**

Solution:

269. 1 and 0 in binary number system are used to represent the two different voltage levels or logic levels in digital circuits. However, in most applications, a long string of 1’s and 0’s occur, and makes the data presentation “nasty”. To condense this long string of 1’s and 0’s, the ___________ number system is (are) also used.

A. octal

B. decimal

C. hexadecimal

D. all of the above

Answer: **Option D**

Solution:

270. How many symbols are used in octal digital number system?

A. 16

B. 4

C. 8

D. 2

Answer: **Option C**

Solution:

271. How many symbols does hexadecimal digital number system used?

A. 16

B. 4

C. 8

D. 32

Answer: **Option A**

Solution:

272. What is the equivalent of decimal number 11 in binary?

A. 1101

B. 1110

C. 1111

D. 1011

Answer: **Option D**

Solution:

273. Which of the following is not used in hexadecimal digital symbols?

A. A

B. C

C. H

D. F

Answer: **Option C**

Solution:

274. What is the equivalent of decimal 7 in octal?

A. 21

B. 49

C. 7

D. 14

Answer: **Option C**

Solution:

275. The decimal 36020 is equivalent to hexadecimal ___________.

A. 8CB4

B. 88BC

C. 8BC8

D. 884C

Answer: **Option A**

Solution:

276. What is the equivalent of decimal 14 in binary?

A. 1110

B. 1011

C. 1101

D. 1111

Answer: **Option A**

Solution:

277. The code 1011 in BCD is

A. 24

B. Letter A

C. 11

D. Invalid

Answer: **Option D**

Solution:

278. Conversion from binary to octal number system needs a grouping of bits by

A. Two

B. Three

C. Four

D. Five

Answer: **Option B**

Solution:

279. Convert the given binary number 1010011.01 to octal system.

A. 511.1

B. 511.2

C. 123.1

D. 123.2

Answer: **Option D**

Solution:

280. What is the hexadecimal equivalent of the binary number 1010011.01?

A. 53.4

B. 53.1

C. A6.1

D. A6.4

Answer: **Option A**

Solution:

281. The most practical way of converting hexadecimal numbers to binary is to give each number its _________ equivalent bits.

A. Two

B. Three

C. Four

D. Five

Answer: **Option C**

Solution:

282. The binary equivalent of the hexadecimal number ECE.5

A. 1110 1100 1110.0101

B. 1110 1100 1110.101

C. 1101 1100 1101.101

D. 1101 1100 1101.0101

Answer: **Option A**

Solution:

283. Convert (1111 1111 1111 1111)2 to decimal number.

A. 32 767

B. 32 768

C. 65 535

D. 65 536

Answer: **Option C**

Solution:

284. Find the sum of binary number 1010 and 0011.

A. 1021

B. 1101

C. 1011

D. 1111

Answer: **Option B**

Solution:

285. Get the sum of (110.1101)2 and (11.01)_{2}.

A. 1010.0101

B. 1010.0001

C. 1101.0101

D. 0111.1010

Answer: **Option B**

Solution:

286. What is the difference between the given binary numbers, 110.1101 and 11.01?

A. 110.0000

B. 111.1010

C. 11.1010

D. 11.1001

Answer: **Option D**

Solution:

287. Find the radix-minus one complement of (110.1101)_{2}.

A. 111.0010

B. 010.0011

C. 1.001

D. 001.0010

Answer: **Option D**

Solution:

288. Give the true complements of (1101.1100)_{2}.

A. 0010.0011

B. 10.0011

C. 10.01

D. 0010.0100

Answer: **Option D**

Solution:

289. Mathematics used in expressing, analyzing, and designing of digital electronic circuits.

A. Boolean algebra

B. Numerical methods

C. Statistical approach

D. Logical mathematics

Answer: **Option A**

Solution:

290. Method(s) used in simplifying Boolean algebra.

A. Karnaugh map

B. Map-entered variable technique

C. Quine-McCluskey tabular method

D. All of the above

Answer: **Option D**

Solution:

291. Karnaugh map is the most commonly used method in simplifying Boolean expression or logical functions. In this method only 1’s and 0’s are entered into the table, while ________ includes variables into the table.

A. Boolean algebra

B. Map-entered variable technique

C. Superposition method

D. Quine-McCluskey tabular method

Answer: **Option B**

Solution:

292. A suitable method in simplifying Boolean expression when the system deals with more

than six variables.

A. Boolean algebra

B. Karnaugh map

C. Map-entered variable technique

D. Quine-McCluskey tabular method

Answer: **Option D**

Solution:

293. What level is used to represent logic 1 in a negative logic circuit?

A. negative transition level

B. low level

C. positive transition level

D. high level

Answer: **Option B**

Solution:

294. What level is used to represent logic “0” in a negative logic circuit?

A. high level

B. low level

C. negative transition level

D. positive transition level

Answer: **Option A**

Solution:

295. _________ is a gate which has two or more low inputs signals to get a low output.

A. AND

B. Inverter

C. OR

D. NAND

Answer: **Option C**

Solution:

296. What is the logic circuit having two or more inputs but only output, with high output of any or all inputs are high, with low output only if all inputs are low?

A. AND gate

B. OR gate

C. NOR gate

D. NAND gate

Answer: **Option B**

Solution:

297. A logic gate whose output is HIGH when a single HIGH at its input is present.

A. OR gate

B. NOR gate

C. AND gate

D. NAND gate

Answer: **Option A**

Solution:

298. An output of logic zero can be generated by what logic gate(s) if all inputs are zero?

A. OR gate

B. AND gate

C. NOR gate

D. NAND gate

Answer: **Option A**

Solution:

299. Logic gate that generates an output of logic zero if and only if all inputs are zero.

A. OR gate

B. AND gate

C. NOR gate

D. NAND gate

Answer: **Option A**

Solution:

300. A solid state device which only gives a “1” output if all inputs are also “1” is called

A. an AND gate

B. a NAND gate

C. a NOR gate

D. an OR gate

Answer: **Option A**

Solution:

### Questions and Answers in Computer Fundamentals

Following is the list of multiple choice questions in this brand new series:

**MCQ in Computer Fundamentals**

**MCQs from Number 51 – 100**Answer key:

**PART II**

**MCQs from Number 101 – 150**Answer key:

**PART III**

**MCQs from Number 151 – 200**Answer key:

**PART IV**

**MCQs from Number 201 – 250**Answer key:

**PART V**

**MCQs from Number 251 – 300**Answer key:

**included**

**MCQs from Number 301 – 350**Answer key:

**included**

**MCQs from Number 351 – 400**Answer key:

**included**

**MCQs from Number 401 – 450**Answer key:

**included**

**MCQs from Number 451 – 500**Answer key:

**included**