Multiple Choice Questions Topic Outline
- MCQs in Analog and Digital System
- MCQs in Binary Number System
- MCQs in Boolean Algebra
- MCQs in Mathematical Logic and Switching Networks
- MCQs in Basic digital Circuits (logic gates, flip-flops, multivibrators, etc)
- MCQs in Static and dynamic Memory Devices
- MCQs in Programming and Machine Languages
- MCQs in Information and Acquisition Processing
- MCQs in Analog / Digital Conversion
- MCQs in Computer Networking
The Series
Following is the list of multiple choice questions in this brand new series:
Start Practice Exam Test Questions Part 1 of the Series
1. Which of the following involves digital quantities?
- A. Ten position switch
- B. Current meter
- C. Temperature
- D. Radio volume control
2. Which of the following choices is NOT a characteristic of analog quantity?
- A. Variable amplitude
- B. One quantity is represented by another which is proportional to the first
- C. Is considered discrete
- D. They can vary over a continuous range of values
3. The decimal system is composed of _____ numerals or symbols.
- A. 2
- B. 10
- C. 8
- D. 16
4. Change in state is
- A. same state
- B. reset
- C. set
- D. toggle
5. What is the decimal equivalent of (1101011)2?
- A. 107
- B. 108
- C. 96
- D. 100
6. What is the next binary number following (10111)2 in the counting sequence?
- A. 11100
- B. 11001
- C. 10110
- D. 11000
7. What is the largest decimal value that can be represented using 12 bits?
- A. 144
- B. 2048
- C. 4095
- D. 4096
8. What is the largest number that can be represented using 8 bits?
- A. 11111111
- B. 10111011
- C. 10111111
- D. 11011111
9. A digital circuit is also referred to as a/an _____ circuit.
- A. arithmetic
- B. logic
- C. electrical
- D. sequential
10. CMOS means
- A. Complementary Main-Oxide Semiconductor
- B. Complementary Metal-Oxide Semiconductor
- C. Complements Main-Oxidation Semiconductor
- D. Correlation in Metal Oxidized Semiconductor
11. What is the smallest type of computer in terms of their physical size?
- A. Minicomputer
- B. Mainframe
- C. Maxicomputer
- D. Microcomputer
12. Equivalent of decimal value of 178 in straight binary code is _____ and in BCD is _____.
- A. 11000, 11111111
- B. 10111101, 100000
- C. 10110010, 101111000
- D. 111111, 1100000
13. If each digit of a decimal number is represented by its binary equivalent, the result is a code called
- A. Morse code
- B. Binary system
- C. Binary-coded decimal
- D. Straight binary coding
14. Convert (614)8 to decimal.
- A. 400
- B. 384
- C. 392
- D. 396
15. BCD code has always _____ bits per number.
- A. 2
- B. 4
- C. 8
- D. 16
16. Convert (B2F)16 to octal.
- A. 5547
- B. 5457
- C. 7547
- D. 11010
17. Convert 1000 1001 0111 (BCD) to its decimal equivalent.
- A. 798
- B. 457
- C. 897
- D. 101
18. Which of the following items below is NOT one of the three basic operations of Boolean algebra?
- A. Logical addition
- B. Logical complementation
- C. Logical subtraction
- D. Logical multiplication
19. How many bits are required to represent an eight digit decimal number in BCD?
- A. 256
- B. 4
- C. 255
- D. 32
20. The _____ belongs to a class of codes called the minimum-change codes, in which only one bit in the code group changes when going from one step to the next.
- A. Morse code
- B. BCD code
- C. Excess-3 code
- D. Gray code
21. The most widely used 7-bit alphanumeric code is the
- A. ASCII
- B. EBCDIC
- C. Straight binary code
- D. Gray code
22. What is the hex equivalent of an ASCII code which means “HELP”?
- A. 48 45 4C 50
- B. 4C 50 51 52
- C. 58 57 58 48
- D. 48 45 50 50
23. A _____ takes the complete decimal number and represents it in binary.
- A. BCD
- B. Gray code
- C. Excess-3 code
- D. Straight binary code
24. The number of input combinations will equal _____ for an N-input truth table.
- A. 2N-1
- B. N
- C. 2N
- D. N-1
25. The _____ operation result will be 1 if any one or more variables is a 1.
- A. NOT
- B. AND
- C. OR
- D. NOR
26. A circuit that operates in such a way that its output is high when all its inputs are high.
- A. OR
- B. NAND
- C. NOR
- D. AND
27. What is the only input combination that will produce a high at the output of a five-input AND gate?
- A. At least one low input
- B. At least one high input
- C. All inputs should be low
- D. All inputs should be high
28. The output of an inverter is connected to the input of a second inverter. Determine the output level of the second inverter.
- A. Output level is the complement of the input level
- B. Output level is the same as the input level
- C. High output is observed
- D. Undetermined state
29. Given: x = A’BC (A+D)’. Determine the output of the circuit x if A = 0, B = 1, C = 1
and D = 0.
- A. 0
- B. 1
- C. 2
- D. 10
30. With OR operation, 1 + 1 = _____
- A. 1
- B. 0
- C. 10
- D. 2
31. Use the expression for x = D + [(A+B)C]’ · E to determine the output of the circuit for the conditions A = B = E = 1, C = D = 0.
- A. 0
- B. 1
- C. 2
- D. 10
32. The Boolean expression for a six-input OR gate
- A. A + B + C
- B. A · B · C · D · E · F
- C. A + B + C + D + E + F
- D. U + V + W + X + Y + Z
33. What type of gate is equivalent to a NAND gate followed by an inverter?
- A. OR
- B. AND
- C. XOR
- D. NOR
34. Simplify the expression y = AB’D + AB’D’.
- A. AB
- B. D’
- C. BCD
- D. AB’
35. How many different ways can we implement the inversion operation in a logic circuit?
- A. One
- B. Two
- C. Three
- D. Four
36. In Boolean algebra, B · B’ =
- A. B
- B. B’
- C. 0
- D. 1
37. In Boolean algebra, G + GF =
- A. GF
- B. G
- C. F
- D. 1
38. In Boolean algebra, X + 1 =
- A. X + 1
- B. X
- C. 0
- D. 1
39. A circuit with no memory characteristic and whose output depends only on the current value of its inputs.
- A. SLC
- B. Boolean circuits
- C. CLC
- D. Multiplexers
40. Determine the sum-of-product expression for a circuit with four inputs and an output that is HIGH only when A is low at the same time that exactly two inputs are low.
- A. A’B’C’D + A’B’CD’ + A’BC’D’
- B. A’B’C’ + C’D’
- C. A’B’C’ + A’C’D’ + A’B’D’
- D. 10
41. What graphical device is used to convert a truth table to its corresponding logic circuit in a simple and orderly process?
- A. Karnaugh map
- B. State table
- C. Truth table
- D. State diagram
42. What is the output of an EX – OR gate when a logic signal and its exact inverse are connected to its input?
- A. X’
- B. X
- C. 1
- D. 0
43. One of the standard levels of complexity of integrated circuits which contains 100,000 and more number of gates.
- A. SSI
- B. MSI
- C. VLSI
- D. ULSI
44. What is the most common type of digital IC package?
- A. DIP
- B. Metal type
- C. CMOS
- D. TTL
45. An acceptable voltage range of a logic 0 for TTL.
- A. 2 to 5 V
- B. 0 to 0.8 V
- C. 0 to 1.5 V
- D. 3.5 to 5 V
46. An acceptable voltage range of a logic 1 for TTL.
- A. 2 to 5 V
- B. 0 to 0.8 V
- C. 0 to 1.5 V
- D. 3.5 to 5 V
47. An acceptable voltage range of a logic 0 for CMOS operating at VDD = 5 V.
- A. 2 to 5 V
- B. 0 to 0.8 V
- C. 0 to 1.5 V
- D. 3.5 to 5 V
48. An acceptable voltage range of a logic 1 for CMOS operating at VDD = 5 V.
- A. 2 to 5 V
- B. 0 to 0.8 V
- C. 0 to 1.5 V
- D. 3.5 to 5 V
49. What happens when the input to a digital IC is left unconnected for TTL ICs?
- A. It acts like logic 1
- B. It becomes overheated
- C. It acts just like logic 0
- D. It eventually destroys itself.
50. An unconnected input is termed as _____.
- A. open
- B. close
- C. disconnected
- D. floating
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