Computer Logical Quiz

1. Which of the following is not a binary number?

 10101010

 20202020

 01010101

 10101101

 11111111

Solution:

Binary number has only two digits i.e. 0 and 1

2. Which among the following is an appropriate binary conversion for the number 013 (which is of base 8)?

 101010

 11011

 1011

 1110

 0001

Solution:

Following are the steps to convert 013 (octal number) to binary

3.The following image represents which logic gate?

 AND

 OR

 NOR

 NAND

 NOT

4. If ∆ represents ‘0’ and ○ represents ‘1’. What will be the one’s complement of - ○∆∆○○∆? 

 011001

 100110

 101010

 000000

 111111

Solution:

○∆∆○○∆ represents 100110. For finding one’s complement we change each 1 to 0 and each 0 to 1. Hence One’s complement of 100110 will be 011001. (Note: this is not the same question as the one asked in SBI Clerk mains.)

5. Which of the following is a Logical Disjunction? 

 OR gate

 AND gate

 NOT gate

 both(a) and (b)

 All of the above

Solution:

When two statements are combined with 'OR,' then it is a disjunction.

6. If Ӣ represents ‘1’ and Ṉ represents ‘0’. A is the input end of NOT logic gate and B is the only output. What will be the output if the input is A=Ӣ? 

 ṈӢ

 Ṉ

 Ӣ

 ӢṈ

 ӢṈ Ӣ

Solution:

7.Which of the following symbol represents input or output in a flow chart?

 a

 b

 c

 d

 e

8. What is the range of Hexadecimal Number system? 

 0-F

 0-1

 0-Z

 A-Z

 0-9

9. If © represents ‘1’ and ∞ represents ‘0’. What will be the one’s complement of -© ∞© ∞∞©©? 

 0110011

 1010011

 0011001

 0101100

 1111111

10. Convert the given Binary number to decimal: 101011 

 45

 30

 41

 42

 43

Solution: