Computer & IT · Topic 1
Parts of a computer, memory, storage units and kinds of software.
Learn first
Learn the parts of a computer, the difference between kinds of memory, and the kinds of software.
Practise
Try each question, then open the answer. MCQs 51–100 of 347.
51.How many keys does a standard full-size keyboard have?
Answer: B. About 104
A standard Windows keyboard has 104 keys.
52.The common keyboard layout is called what, after its first six letters?
Answer: C. QWERTY
QWERTY is named after the top-left letters.
53.Which device reads marks on answer sheets, as in MCQ tests?
Answer: A. OMR
Optical Mark Recognition reads filled bubbles.
54.Which technology converts printed text in an image into editable text?
Answer: A. OCR
Optical Character Recognition reads letters from images.
55.Which technology is used by banks to read cheque numbers?
Answer: C. MICR
Magnetic Ink Character Recognition reads the numbers on cheques.
56.Which device reads the black-and-white bars on products?
Answer: D. Barcode reader
Barcode readers scan product codes at checkouts.
57.The resolution of a monitor is measured in what?
Answer: A. Pixels
Resolution is the number of pixels, such as 1920 × 1080.
58.What does "pixel" stand for?
Answer: C. Picture element
A pixel is the smallest dot of a digital image.
59.The quality of a printer is measured in what?
Answer: A. DPI (dots per inch)
Print resolution is given in dots per inch.
60.Which printer uses a drum and toner?
Answer: C. Laser printer
Laser printers fuse toner powder onto paper.
61.Which printer strikes an inked ribbon with pins?
Answer: B. Dot-matrix printer
Dot-matrix printers are impact printers.
62.Which output device draws large engineering drawings and maps?
Answer: A. Plotter
Plotters draw with pens or ink on large sheets.
63.What does LCD stand for?
Answer: D. Liquid Crystal Display
LCD screens use liquid crystals.
64.What does UPS stand for?
Answer: B. Uninterruptible Power Supply
A UPS supplies power from batteries during outages.
65.Which storage device has spinning magnetic platters?
Answer: C. Hard disk drive (HDD)
HDDs store data magnetically on spinning disks.
66.Which storage device has no moving parts and uses flash memory?
Answer: A. Solid-state drive (SSD)
SSDs are faster and more robust than HDDs.
67.Which storage medium was commonly 1.44 MB in size?
Answer: B. 3.5-inch floppy disk
The standard 3.5-inch floppy held 1.44 MB.
68.About how much data does a standard CD hold?
Answer: C. About 700 MB
A CD holds about 650–700 MB.
69.About how much data does a single-layer DVD hold?
Answer: D. About 4.7 GB
A single-layer DVD holds 4.7 GB.
70.About how much data does a single-layer Blu-ray disc hold?
Answer: D. About 25 GB
A single-layer Blu-ray holds 25 GB.
71.Which storage is often used for long-term backup of very large data in data centres?
Answer: D. Magnetic tape
Tape is cheap and durable for archives.
72.What does USB stand for?
Answer: C. Universal Serial Bus
USB connects devices to computers.
73.Which port is commonly used to connect a computer to a modern TV or monitor with sound?
Answer: A. HDMI
HDMI carries both video and audio.
74.What does BIOS stand for?
Answer: B. Basic Input Output System
BIOS starts the hardware when the computer boots.
75.Software permanently stored in hardware, such as the BIOS, is called what?
Answer: A. Firmware
Firmware sits between hardware and software.
76.Which type of software manages the computer's hardware and resources?
Answer: B. System software
Operating systems and drivers are system software.
77.A word processor is an example of which type of software?
Answer: D. Application software
Application software does tasks for the user.
78.Antivirus and disk clean-up programs are examples of what?
Answer: A. Utility software
Utilities maintain and protect the computer.
79.A small program that lets the operating system control a hardware device is called what?
Answer: A. Device driver
Drivers let the OS talk to printers, graphics cards and so on.
80.Software that is free to use but whose code is not open is called what?
Answer: C. Freeware
Freeware costs nothing but is not necessarily open source.
81.Software you can try free for a time before paying is called what?
Answer: C. Shareware
Shareware is distributed on a try-before-you-buy basis.
82.Software whose source code anyone may read, change and share is called what?
Answer: D. Open-source software
Linux and Firefox are open source.
83.Which translator converts a whole high-level program into machine code at once?
Answer: A. Compiler
A compiler translates the whole program before it runs.
84.Which translator converts and runs a program line by line?
Answer: B. Interpreter
Python is commonly run by an interpreter.
85.Which translator converts assembly language into machine code?
Answer: A. Assembler
An assembler translates assembly mnemonics.
86.The language made of 0s and 1s that the CPU understands directly is called what?
Answer: B. Machine language
Machine language is binary code.
87.Which of these is a high-level programming language?
Answer: A. Python
High-level languages are close to human language.
88.Which programming language was developed by Dennis Ritchie?
Answer: C. C
Ritchie created C at Bell Labs in the early 1970s.
89.Who created the Python programming language?
Answer: C. Guido van Rossum
Python was first released in 1991.
90.Who created Java?
Answer: D. James Gosling
Java was developed at Sun Microsystems in 1995.
91.Who created C++?
Answer: B. Bjarne Stroustrup
C++ extended C with classes.
92.Which language is mainly used to style web pages?
Answer: C. CSS
CSS controls the look of web pages.
93.Which language is used to query databases?
Answer: A. SQL
Structured Query Language manages relational databases.
94.COBOL was designed mainly for which use?
Answer: C. Business data processing
COBOL means Common Business-Oriented Language.
95.FORTRAN was designed mainly for which use?
Answer: D. Scientific and engineering calculation
FORTRAN means Formula Translation.
96.An error in a program is called what?
Answer: B. Bug
Finding and fixing errors is called debugging.
97.Who popularised the term "debugging" after a moth was found in a computer?
Answer: B. Grace Hopper
Grace Hopper's team logged a moth found in the Harvard Mark II in 1947.
98.A step-by-step procedure to solve a problem is called what?
Answer: C. Algorithm
Algorithms can be shown as flowcharts or pseudocode.
99.A diagram showing the steps of a program with shapes and arrows is called what?
Answer: B. Flowchart
Flowcharts use symbols such as ovals, rectangles and diamonds.
100.In a flowchart, which shape is used for a decision?
Answer: A. Diamond
A diamond shows a yes/no decision.
Test yourself
Each quiz has 50 MCQs from this topic and 50 minutes. A correct answer earns 1 mark and each wrong answer takes off 0.25; skipped questions score nothing. No password needed.
