Computer Aptitude Questions

Q1. Which among the following is an appropriate binary conversion for the number 421 (which is of base 10)?
(a) 10101010
(b) 11010100
(c) 10011001
(d) 110100101 
(e) 010101010

Q2. 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?
(a) 1
(b) 0
(c) 101
(d) 01
(e) 10

Q3. If ∆ represents ‘1’ and ○ represents ‘0’. What will be the one’s complement of - ○∆∆○○∆?
(a) 011001
(b) 100110 
(c) 101010
(d) 000000
(e) 111111

○∆∆○○∆ 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.

Q4.  Following diagram depicts which logic gate?

(a) NOR gate
(b) NOT gate 
(c) OR gate
(d) NAND gate
(e) None of the above

Q5. Which of the following is a correct set of hexadecimal digits?
(a) 102n
(b) a19fk
(c) ZOLO12
(d) FACE
(e) 0101xx

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

Q6. Which of the following is a Logical Conjunction?
(a) AND gate 
(b) OR gate
(c) NOT gate
(d) both(a) and (b)
(e) All of the above

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.

Q7. If Ӣ represents ‘1’ and Ṉ 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= Ӣ and B= Ӣ?
(a) Ṉ Ӣ
(b) Ṉ
(c) Ӣ 
(d) Ӣ Ṉ
(e) Ӣ Ṉ Ӣ

Directions (8-10) : Triangle represents ∆ (1) and circle represents ○ (0). If triangle appears in unit's place then its value is 1. If it appears in 10's place its value is doubled to 2 like that it continues. Using the given terminology answer the following questions. For example: 

∆ = 1
∆○∆ = 4, 0, 1 = 4+0+1
∆○ = 2

Q8. How will you represent ‘87’ in this code language?
(a) ○∆∆∆○∆∆
(b) ∆○∆○∆∆∆
(c) ∆∆○∆∆∆∆
(d) ∆○○∆○○∆
(e) ∆∆○∆∆∆○

Q9. What will be the code for ∆∆○○○∆○? 
(a) 98 
(b) 97 
(c) 90 
(d) 94 
(e) 99

Q10. What will be the code for one’s complement of ∆∆○∆? 
(a) 2 
(b) 3 
(c) 4 
(d) 5 
(e) 6

1’s complement of 1101 = 0010 = 2 

Q11. Frame relay operates in which of the following layers?
(a) Physical and Data Link layers 
(b) Data link and Network Layers
(c) Session Layer and Physical Layer
(d) Network Layer and Session layer
(e) Presentation Layer and Session Layer

Frame Relay is a high-performance WAN protocol that operates at the physical and data link layers of the OSI reference model. Frame Relay originally was designed for use across Integrated Services Digital Network (ISDN) interfaces.

Q12. How can we perform tasks on a computer without using the Windows graphical interface?
(a) By using command prompt window 
(b) By using Office 360
(c) By using control panel
(d) By connecting through the internet
(e) None of the above

By using command prompt tasks can be performed without graphical user interface.

Q13. What is the term used as basic transfer unit associated with a packet-switched network?
(a) MAC
(b) Datagram 
(c) Internet Protocol
(d) Bits
(e) None of the above

A datagram is a basic transfer unit associated with a packet-switched network. Datagrams are typically structured in header and payload sections. Datagrams provide a connectionless communication service across a packet-switched network.

Q14. GIGO is a simple principle followed by Computers. GIGO stands for?
(a) Garbage In Garbage Out 
(b) Great Instructions Great Output
(c) Good Input Good Output
(d) Great Instructions Go Out
(e) Gnome Instructions Global Output

The term "garbage in, garbage out" originated in the computer science and information technology fields to illustrate the fact that the quality of the output received from a computer program depends on the quality of the information that was input.

Q15. Given the following URL - http://www.example.com:80/path/to/myfile.html
Here - 'www.example.com', ':80' and stand for _____ and ______ respectively.
(a) IP and source
(b) Domain Name and Port 
(c) File name and Path
(d) Path and Port
(e) IP and Locator