Computer And IT (Railway)

Total Questions: 50

21. The first mechanical computer designed by Charles Babbage was called: [RRB NTPC CBT-1 Exam, 21.01.2021 (Shift-II)]

(1) Abacus
(2) Analytical Engine
(3) Calculator
(4) Processor

Correct Answer: (2) Analytical Engine

Solution:Analytical Engine, generally considered the first computer, designed and partly built by the English inventor Charles Babbage in the 19th century (he worked on it until his death in 1871).

• Tim Cranmer invented abacus.

22. What is the full form of DDL in terms of computer jargon? [RRB NTPC CBT-1 Exam, 21.01.2021 (Shift-II)]

(1) Data Definition Language
(2) Digital Data Logic
(3) Dynamic Data Language
(4) Direct Data Language

Correct Answer: (1) Data Definition Language

Solution:In the context of SQL, data definition or data description language (DDL) is a syntax for creating and modifying database objects such as tables, indices, and users.

• DDL statements are similar to a computer programming language for defining data structures, especially database schemas.

23. What are the three constituents of CPU in a computer? [RRB NTPC CBT-1 Exam, 21.01.2021 (Shift-II)]

(1) Control unit, ALU, keyboard
(2) Control unit, ALU, memory
(3) Monitor, memory, control unit
(4) Monitor, ALU, memory

Correct Answer: (2) Control unit, ALU, memory

Solution:At its most fundamental level, a computer consists of a control unit, an arithmetic logic unit (ALU), a memory unit, and input/output (I/O) controllers.

• The ALU performs simple addition, subtraction, multiplication, division, and logic operations, such as OR and AND.

• The memory stores the program's instructions and data.

• The control unit fetches data and instructions from memory and uses operations of the ALU to carry out those instructions using that data.

24. ___________refers to unsolicited commercial emails that flood the Internet. [RRB NTPC CBT-1 Exam, 22.01.2021 (Shift-I)]

(1) Spyware
(2) Trojan Horse
(3) Malware
(4) Spam

Correct Answer: (4) Spam

Solution:Spam is unsolicited Internet content that is typically sent in bulk for advertising purposes from an unknown sender.

• Spam can be used to spread computer viruses, trojan horses or other malicious software.

25. Which of the following is NOT a microblogging site? [RRB NTPC CBT-1 Exam, 22.01.2021 (Shift-I)]

(1) Pinterest
(2) Twitter
(3) Plurk
(4) Tumblr
(5) *

Correct Answer: (5) *

Solution:Twitter, Plurk, Tumblr, Pinterest, Instagram, Facebook, Linkedin etc are all microblogging sites.

26. Who invented HTML in 1990? [RRB NTPC CBT-1 Exam, 22.01.2021 (Shift-I)]

(1) Tim Berners-Lee
(2) David Noble
(3) Kane Kramer
(4) Niklaus Wirth

Correct Answer: (1) Tim Berners-Lee

Solution:First developed by Tim Berners-Lee in 1990. HTML is acronym for Hypertext Markup Language.

• HTML is used to create electronic documents (called pages) that are displayed on the World Wide Web.

27. Trojan Horse is a form of: [RRB NTPC CBT-1 Exam, 23.01.2021 (Shift-I)]

(1) Service attack
(2) Slammer worm
(3) Virus attack
(4) Melissa worm

Correct Answer: (1) Service attack

Solution:A Trojan horse is a type of malware (Virus attack) that downloads onto a computer disguised as a legitimate program.

• A Trojan horse is so-called due to its delivery method, which typically sees an attacker use social engineering to hide malicious code within legitimate software.

28. In computer terminology, what is a nibble? [RRB NTPC CBT-1 Exam, 23.01.2021 (Shift-I)]

(1) Half a byte
(2) A terabyte
(3) A gigabyte
(4) A kilobyte

Correct Answer: (1) Half a byte

Solution:One byte is equal to 8 bits.

• A half byte is called a Nibble.

29. What was India's first supercomputer called? [RRB NTPC CBT-1 Exam, 23.01.2021 (Shift-I)]

(1) PARAM 8000
(2) SAGA 220
(3) PARAM 6000
(4) ENIAC

Correct Answer: (1) PARAM 8000

Solution:Supercomputer PARAM 8000 was launched on July 1, 1991 is considered India's first supercomputer.

• It was developed by the Centre for Development of Advanced Computing Pune (CDAC Pune).

• Technocrat as well as Indian computer scientist Vijay P. Bhatkar is known as father of indian supercomputer.

30. The technology that provides high internet speed over telephone wiring is called: [RRB NTPC CBT-1 Exam, 23.01.2021 (Shift-I)]

(1) ADLS
(2) ASLD
(3) ADSL
(4) ALSD

Correct Answer: (3) ADSL

Solution:Asymmetric Digital Subscriber Line (ADSL) is a type of digital subscriber line (DSL) technology, that transmits digital data at a high bandwidth over existing phone lines to homes and businesses.

• ADSL is used in the local loop of the telephone network.

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