# Computer Aptitude Quiz For SBI/IBPS Exam

**1. Which among the following is an appropriate binary conversion for the number 421 (which is of base 10)?**

10101010

11010100

10011001

110100101

Solution:

**2. If A and B are two input ends of AND logic gate and AB is the only output. What will be the output if the input is A=1 and B=0?**

1

0

101

01

10

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

011001

100110

101010

000000

111111

Solution:

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

**4. Following diagram depicts which logic gate?**

NOR gate

NOT gate

OR gate

NAND gate

None of the above

**5. Which of the following is a correctset of hexadecimal digits?**

102n

a19fk

ZOLO12

FACE

0101xx

Solution:

hexadecimal digits are written using symbols from 0-9 or A-F

**6. Which of the following is a Logical Conjunction?**

AND gate

OR gate

NOT gate

both(a) and (b)

All of the above

Solution:

When two statements are combined with an 'and,' then it is a conjunction. For conjunctions, both statements must be true for the compound (result) statement to be true. When your two statements are combined with an 'or,' it is a disjunction.

**7. If Ó¢ represents ‘1’ and á¹ˆ represents ‘0’. A and B are two input ends of OR logic gate and C is the only output. What will be the output if the input is A=Ó¢ and B=Ó¢?**

á¹ˆÓ¢

á¹ˆ

Ó¢

Ó¢á¹ˆ

Ó¢á¹ˆÓ¢

**8. Which of the following is not a valid binary number?**

00000

11111

FFFFF

101010

010101

**9. Which of the following symbol represents decisional or conditional statement in a flow chart?**

a

b

c

d

e

**10. What are the permitted digits that can be used in Octal Number system?**

0-10

1-9

0-8

0-7

1-8