Computer Science/IT MCQs
Topic Notes: Computer Science/IT
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
81
Subtract (011)₂ from (110)₂.
Answer:
(011)₂
110
82
Which of the following phrases correctly identifies the full name represented by the acronym ASCII?
Answer:
American Standard Code for Information Interchange
ASCII, which stands for "American Standard Code for Information Interchange," is a foundational character encoding standard. It was developed to provide a consistent way for computers and other devices to represent text. Each character, such as letters, numbers, and symbols, is assigned a unique numerical value, allowing for uniform data exchange and display across different systems. This standardization was crucial in the early development of computing and the internet.
83
If you have a folder named `Photos` on your desktop, and your username is `test`, a possible file path on Windows would be:
Answer:
`C:\Users\test\Desktop\Photos`
On Windows, user profiles are typically stored in the `C:\Users` directory, with the desktop being a subfolder of the user's profile folder.
84
Why would you compress a folder before sending it as an email attachment?
Answer:
To combine multiple files into a single attachment and reduce the total size.
This makes the attachment more organized and helps to stay within the email provider's size limits.
85
Why is the octal system sometimes used in computing?
Answer:
It can be easily converted to and from binary, as one octal digit represents exactly three binary digits
Similar to hexadecimal, octal provides a shorthand for binary. Since 8 is 2^3, each octal digit corresponds to a unique group of three bits.
86
Which file extension is used for a standard presentation file created with Microsoft PowerPoint?
Answer:
.pptx
The ".pptx" extension is the standard format for presentations created in Microsoft PowerPoint since the 2007 version.
87
In creating a custom filter in Excel, which is not a Boolean operator?
Answer:
If
"If" is not a Boolean operator; "And," "Or," and "Not" are common Boolean operators used in filters.
88
ASCII characters 0-31 and 127 are known as:
Answer:
Control characters
These characters do not represent printable symbols but are used to control devices (like printers) or communication protocols. Examples include carriage return, line feed, and escape.
89
The NOT gate is also known as an:
Answer:
Inverter
A NOT gate has a single input and a single output. Its function is to invert the input; if the input is 1, the output is 0, and if the input is 0, the output is 1.
90
What is the octal equivalent of the binary number (110101)₂?
Answer:
(65)₈
To convert from binary to octal, group the binary digits into sets of three from right to left. (110 101). Convert each group to its octal equivalent: 110 = 6, 101 = 5. So, the octal number is (65)₈.