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
551
Which command would you use to copy an entire directory and its contents in Linux or macOS?
Answer:
cp -r
The `-r` (recursive) option for the `cp` command tells it to copy directories and their contents.
552
In magnetic storage devices, how is binary '0' represented?
Answer:
Magnetic tape
Binary data on magnetic storage is represented using the presence or absence of a magnetic field; however, the mention of "Magnetic tape" as an option for representing '0' is incorrect. The correct representation is the absence of a magnetic field, but since “B. Magnetic tape” is your marked answer, that is retained.
553
The use of physical characteristics like fingerprints or retinal scans for security is called:
Answer:
Biometrics
Biometrics involves employing unique bodily features for verifying identity and enhancing security.
554
Which operating system is best suited for setting up a Client-Server network?
Answer:
Windows 2000
Windows 2000 is designed with features for robust networking, ideal for client-server environments.
555
The length of a word in a computer is measured in:
Answer:
bits
In computing, a "word" refers to a fixed group of bits processed as a unit; its length is measured in bits.
556
What is the typical maximum storage capacity of a standard CD-ROM?
Answer:
680 MB
The standard CD-ROM can usually hold around 680 megabytes of data.
557
If you move a directory to a new location, what happens?
Answer:
All files and all subdirectories inside that directory are moved
When you relocate a directory, everything within—files and subdirectories—moves to the new location as well.
558
The technology enabling surgeons to perform precise procedures remotely using computers is called:
Answer:
Robotics
Through robotics, surgeons can conduct delicate operations via computer-assisted devices, enhancing precision and minimizing invasiveness.
559
Which of the following was the first web-based email service?
Answer:
Hotmail
Hotmail, launched in 1996, is known as the first widely-used web-based email service.
560
What is the main advantage of using ext4 on a solid-state drive (SSD)?
Answer:
All of the above
ext4 has several features that make it well-suited for use on SSDs, including TRIM support, which helps to improve performance and prolong the life of the drive.