Computer Awareness Questions for IBPS PO/Clerk, IBPS RRB, NIACL, NICL, RBI Grade B, BOI, OBC SO, BoB and other competitive exams.
- Which operation performs a set union of two ‘similarly structured’ tables?
A) Union
B) Join
C) product
D) intersect
E) None of these
View Answer
Option A
Some Extra:
Union operation performs a set union of two ‘similarly structured’ tables.
- Which one of the following is a set of one or more attributes taken collectively to uniquely identify a record?
A) Candidate key
B) Sub key
C) Foreign key
D) Super key
E) none of these
View Answer
Option C
Some Extra:
Super key is a set of one or more attributes taken collectively to uniquely identify a record.
- Which among the following is a property of the entire relation, rather than of the individual tuples in which each tuple is unique?
A) Rows
B) key
C) attribute
D) fields
E) None of these
View Answer
Option B
Some Extra:
Key is a property of the entire relation (relation is a table).
- __________ ensures secure transfer of data over an unsecured network, such as the Internet.
A) Antivirus
B) Hacking
C) cracking
D) spooing
E) Cryptography
View Answer
Option E
Some Extra:
In cryptography, data are sent in such a way that they look completely different from the original data. Thus, cryptography ensures secure transfer of data over an unsecured network.
- The SubSeven is an example of :
A) antivirus
B) Spyware
C) Spam
D) Adware
E) Trojan horse
View Answer
Option E
Some Extra:
SubSeven is a Trojan horse program that appears or pretends to be a genuine application, but actually causes damage to the executable files on the computer.
- What does JAR stand for?
A) JQuerry Application Rapid-development
B) Java Application Resolution
C) Java Archive
D) JQuerry Application Resolution
E) None of these
View Answer
Option C
Some Extra:
In software, JAR (Java Archive) is a package file format typically used to aggregate many Java class files and associated metadata and resources (text, images, etc.) into one file to distribute application software or libraries on the Java platform.
- Bridge is a _________ device.
A) layers 4
B) layers 2
C) layers 5
D) layers 7
E) layers 3
View Answer
Option B
Some Extra:
A bridge is a network device used at the data link layer to connect two dissimilar networks as well as similar networks.
- 10BaseT uses which type of cables to connect network devices?
A) twisted-pair
B) coaxial
C) multi-mode fiber optic
D) single-mode fiber optic
E) Both (a) and (c)
View Answer
Option A
Some Extra:
In 10BaseT, 10 means the transfer rate of this Ethernet is 10 Mbps; Base describes the type of signaling used, that is Baseband; and T denotes that the cable used is twisted -pair cable.
- Which of the following is not an advantage of wireless networking?
A) Mobility
B) Installation
C) Cost effectiveness
D) Security
E) Both (b) and (c)
View Answer
Option D
Some Extra:
A wireless network allows a user to connect different computers or devices by using wireless network protocols. It provides mobility by allowing access to a network irrespective of the location. The installation of a wireless network is easy compared to a wired network. Also, a wireless network does not required expensive wires a cables; therefore, this type of network is cost effective. However, this type of network is insecure.
- Which of the following topologies does not use switches?
A) Network
B) Physical
C) Application
D) Data Link
E) none of these
View Answer
Option B
Some Extra:
The Physical layer handles voltage, electrical pulses, connectors and, switches so that data can be transmitted over transmission media.
Ty …az
ty:)
ty mam
Thnks AZ
ty..
Thanks Mam :))
Q2 ans is Foreign key or Superkey??
thank you team …..
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