Computers and IT MCQs
Computer Awareness Questions and Quiz for Banking, IBPS, RRB, RBI, SBI, NABARD examinations of 2024-2025. Computer Awareness MCQs for Competitive Exams. GKToday Computer Awareness for IBPS PO, IBPS Clerk, Bank PO, Bank Clerk and other entrance / competitive examinations.
21. Which among the following correctly defines a Wide Area Network?
[A] A Wide Area Network is quite bigger network than the LAN.
[B] The internet is one of the biggest WAN in the world.
[C] In a WAN network, messages are transmitted fast.
[D] All of the Above
Show Answer
Correct Answer: D [All of the Above]
Notes:
A Wide Area Network is not limited to a single location, but it spans over a large geographical area through a telephone line, fiber optic cable or satellite links.
22. Which of the following devices has high bandwidth?
[A] Switch
[B] Router
[C] Modem
[D] Bridge
Show Answer
Correct Answer: A [Switch]
Notes:
A network switch is a computer networking device that connects devices on a computer network by using packet switching to receive, process, and forward data to the destination device.
23. Which of the following represents a sine wave?
[A] Non-periodic analog signal
[B] Periodic analog signal
[C] Periodic digital signal
[D] Non-periodic digital signal
Show Answer
Correct Answer: B [Periodic analog signal]
Notes:
The sine wave is the most fundamental form of a periodic analog signal. A periodic signal completes a pattern within a measurable time frame, called a period, and repeats that pattern over subsequent identical periods.
24. What will be the bandwidth of a periodic signal if it is decomposed into five sine waves with frequencies of 100, 300, 500, 700 and 900 Hz?
[A] 900 Hz
[B] 100 Hz
[C] 500 Hz
[D] 800 Hz
Show Answer
Correct Answer: D [800 Hz]
Notes:
Bandwidth = Highest frequency – Lowest frequency. In this case, bandwidth will be equal to 900Hz-100 Hz i.e. 800Hz.
25. What is the number of bit interval per second known as?
[A] Bit period
[B] Bit lag
[C] Bit capacity
[D] Bit rate
Show Answer
Correct Answer: D [Bit rate]
Notes:
The bit rate is the number of bit interval per second. This mean that the bit rate is the number of bits send in one second, usually expressed in bits per second.
26. What do we call the handoff in which there is a break in the connection on the cellular network?
[A] Hard handoff
[B] Soft handoff
[C] Rigid handoff
[D] Variable handoff
Show Answer
Correct Answer: A [Hard handoff]
Notes:
Hard Handoff refers to an actual break in the connection while switching from one cell or base station to another. The switch takes place so quickly that it can hardly be noticed by the user.
27. Which of these factors affect the line of sight communication?
[A] line of sight distance
[B] curvature of the earth
[C] Both a and b
[D] None
Show Answer
Correct Answer: C [Both a and b]
Notes:
The line of sight communication is affected by (a) the line of sight distance (b) the curvature of the earth. The space waves are used for line of sight communication such as television broadcast, microwave link and satellite communication.
28. Which port is used by HTTP?
[A] 443
[B] 80
[C] 22
[D] 79
Show Answer
Correct Answer: B [80]
Notes:
HTTP stands for Hypertext Transfer Protocol. It uses port 80 to communicate whereas HTTPS used port number 443 for communication.
29. Which of these protocols is used to retrieve email messages from a mail server?
[A] IMAP
[B] HTTPS
[C] TFTP
[D] SNMP
Show Answer
Correct Answer: A [IMAP]
Notes:
The Internet Message Access Protocol or IMAP is an Internet standard protocol used by email clients to retrieve email messages from a mail server. The default port used is 143.
30. Which of these ports is used by SNMP?
[A] 161
[B] 465
[C] 22
[D] 143
Show Answer
Correct Answer: A [161]
Notes:
The Simple Network Management Protocol (SNMP) is used to manage networks which is used to monitor, configure and control network devices. It uses port 161/162.
