# CEC Digital Electronics & Microprocessor Lesson 3, 4, 5 MCQ Answers (Number System)

Number System MCQ :- CEC Digital Electronics And Microprocessor Lesson 3,4 and 5

## MCQ’S – LESSON 3 Answers(Number System)

1.How many digits or numbers are present in octal number system?

• 3

Ans:- 8

2. If the base of the system is ‘8’. Then we call it as _______ number system?

• Octal
• Binary
• None

Ans:- Octal

3. The basic digits of octal system is 0,1,2,…7

• True
• False

Ans:- True

4. Octal digital can be represented by a group of _____ bit sequence

• 6

Ans:- 3

5. what is the decimal equivalent of(55)8

• 45
• 55
• 65
• 75

Ans:- 45

6. What is the decimal equivalent of  (35.4)8

• 29.5
• 29.05
• 29.04
• 29.4

Ans:- 29.5

7. To convert the decimal number into octal number, repeatedly divide the number by ____

• 16
• 4

Ans:- 8

8. What is the octal equivalent of (34)10?

• 40
• 41
• 42
• 43

Ans:- 42

## MCQ’S – LESSON 4Answers(Number System)

1.What is the octal equivalent of (.002)₁₀?

• 0011
• .0010
• .1011
• .1111

Ans:- .0010

2. The binary number of 2 is ____

• 111
• 001
• 010
• 100

Ans:- 010

3. Octal number should be written in _____ bit form.

• 5

Ans:- 3

4. The binary equivalent of 36.6 is___________

• 011110.110
• 011110.111
• 011110.010
• 11110.11

Ans :- 11110.11

5. The octal equivalent of 111000111 is ___

• 101
• 010
• 707
• 606

Ans:- 707

6. 10011 in octal is ___

• 23
• 25
• 26
• 27

Ans:- 23

7. The octal equivalent of decimal number 17 is _______________?

• 21
• 16
• 15
• 14

Ans:- 21

## MCQ’S – LESSON 5Answers(Number System)

1.What is the value of 0+0 in binary addition  =  ____

• both
• None

Ans:- 0

2. What is the value of 0+1 in binary addition  =  ____

• both
• None

Ans:- 1

3. What is the value of 1+1 in binary addition  =   ———-

• 01
• 11
• 10
• None

Ans:-  10

4. What is the value of 011+010 in binary addition  =  ____

• 001
• 111
• 101
• 110

Ans:- 101

5. What is the value of 1101.01+110.10 in binary addition  =  ____

• 01100.01
• 10011.11
• 01100.11
• 01100.10

Ans:- 10011.11

6. The hexadecimal equivalent of 12 is ____

• None

Ans:- C

7. The hexadecimal equivalent of 11111111 is ____

• AF
• CF
• FF
• DF

Ans:- FF

8. What is the value of 9+4 in hexadecimal addition  =  ____

• F

Ans:- F

9. What is the value (100)₁₀ +(110)₁₀ in Decimal addition?

• CC
• CD
• DD
• D2

Ans:- D2

• F1
• 2A
• DD
• 1A

Ans:- 1A

• 20
• 16
• 17
• 18

Ans:- 18

12. Microprocessor uses ____ number system.

• Octal
• Binary
• Decimal

13. What is the value (88)₁₀  + (110)₁₀  in Decimal addition?

• CC
• CD
• FF
• C6

Ans:- C6

• 170.6
• 177.6
• 177.5
• 176.6

Ans:- 177.6

15. What is 0011+0011 is

• 0110
• 1100
• 1010
• 0111

Ans:- 0110

Number System MCQ:- CEC Digital Electronics And Microprocessor Lesson 3,4 and 5