651. Main storage is also called
A. Accumulator
B. Control unit
C. Register unit
D. memory
✅ The correct answer is option D.
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
652. When the time to establish link is large and the size of data is small, the preferred mode of data transfer is
A. Circuit switching
B. Packet switching
C. Time division multiplexing
D. All of the above
✅ The correct answer is option B.
653. The first machine to successfully perform a long series of arithmetic and logical operations was:
A. ENIAC
B. Mark I
C. Analytic engine
D. UNIVAC-I
✅ The correct answer is option B.
654. Whenever a peripheral is being controlled by the CPU, it is said to be online. If additionally, the computer files are updated as soon as any change takes place, the system is called
A. quick processing system
B. batch processing system
C. real time system
D. remote processing system
✅ The correct answer is option C.
655. A computer program that instructs other programs to perform a particular type of operation is
A. System software
B. Application program
C. Compiler
D. Interpreter
✅ The correct answer is option A.
656. Which is true for the digital computer?
A. It is less accurate than the analog computer
B. It represents the decimal numbers through a string of binary digits
C. It is used primarily in scientific applications
D. Both A and C
✅ The correct answer is option B.
657. The first mechanical calculating machine was made by
A. William Oughtred
B. Gottfried Leibnitz
C. Blaise Pascal
D. Charles Babbage
✅ The correct answer is option C.
658. The CPU of a computer transfers print output to a temporary disk memory at high speed and then gets back to processing another job without waiting for the output to got to the printer. In this way, the CPU does not remain idle due to its own high speed as compared to the low speed of the printer. What is the name of this memory?
A. External memory
B. I/O memory
C. ROM
D. Buffer memory
✅ The correct answer is option D.
659. A single bus structure is primarily found in
A. Main frames
B. Super computers
C. High performance machines
D. Mini-and micro-computers
✅ The correct answer is option D.
660. What is the highest address possible if 16 bits are used for each address?
A. 65536
B. 12868
C. 16556
D. 643897
✅ The correct answer is option A.