21. The least expensive OCR units can read
A. hand printed numbers
B. machine printed numbers
C. marks
D. handwriting
✅ The correct answer is option C.
Basics of Computer Science MCQs
Strengthen your fundamental knowledge with our Basics of Computer Science MCQs with answers and explanations. Our collection covers key topics such as computer fundamentals, hardware and software, operating systems, networking basics, databases, programming concepts, and internet technologies. These multiple-choice questions are designed for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, CSS, PMS, university entry tests, and IT job assessments. Practice online to improve your understanding, enhance problem-solving skills, and excel in exams with our updated Basics of Computer Science MCQs
22. A device invented by Dr. Bobeck in 1966, for mass storage of data is
A. Punched paper tape
B. Magnetic bubble storage
C. Magnetic tape
D. Magnetic disk
✅ The correct answer is option B.
23. Storage on PC allows you to store files until something erases it, but memory loses its contents whenever its _____ is lost
A. static
B. disk space
C. power
D. both A and B
✅ The correct answer is option C.
24. Which was the first commercial computer built by M.V. Wilkies.
A. Super computer
B. LEO
C. Mainframe
D. Micro computer
✅ The correct answer is option B.
25. A type of core store that has a lower access time than the devices used for working store in the same processor is known as
A. core memory
B. buffer
C. fast core
D. address register
✅ The correct answer is option C.
26. Data System management has long-term viability as a separate business function because
A. It requires much technical knowledge
B. It requires large investments
C. Specialists in data systems cannot be integrated into a marketing or manufacturing organization
D. An integrated database accessible to all requires independent management
✅ The correct answer is option D.
27. The monitor of a computer is connected to it by a
A. Wire
B. Cable
C. Bus
D. Line driver
✅ The correct answer is option B.
28. The first mechanical calculator was invented in
A. 1958
B. 1642
C. 1658
D. 1972
✅ The correct answer is option B.
29. Which of the following holds data and processing instructions temporarily until the CPU needs it?
A. ROM
B. control unit
C. main memory
D. coprocessor chips
✅ The correct answer is option C.
30. The length of a word in computer is measured in:
A. bits
B. byte
C. millimeters
D. metre
✅ The correct answer is option A.