Worksheet Solutions: Basics of Computer | Computer Science for Class 6 PDF Download

Do as Directed 

Q1: Classify the following images according to the type of data they process: analog or digital.

Ans: (i) Thermometer: Analog
(ii) Clock: Analog
(iii) Computer: Digital

Q2: Sort the images into two categories: large computers and small computers.

Ans: Large computers: Supercomputer, Mainframe computer
Small computers: Laptop, Smartphone

Multiple Choice Questions 

(i) What is considered the first mechanical computing device?
(A) ENIAC
(B) Abacus
(C) Analytical Engine
(D) UNIVAC
Ans: Abacus
Explanation: The abacus is considered the first mechanical computing device, used for performing arithmetic operations. It predates modern electronic computers by thousands of years.

(ii) Who is often referred to as the "Father of Computing"?
(A) Alan Turing
(B) Charles Babbage
(C) Ada Lovelace
(D) John von Neumann
Ans: Charles Babbage
Explanation: Charles Babbage is often referred to as the "Father of Computing" due to his design of the Analytical Engine, a mechanical general-purpose computer conceptually similar to modern computers.

(iii) Which component revolutionized computing by integrating the entire CPU onto a single chip?
(A) Vacuum Tube
(B) Transistor
(C) Microprocessor
(D) Integrated Circuit
Ans: Microprocessor
Explanation: The microprocessor revolutionized computing by integrating the entire CPU onto a single chip, making computers smaller, cheaper, and more powerful.

(iv) Who made significant contributions to computer science by breaking the German Enigma code during World War II?
(A) Alan Turing
(B) Charles Babbage
(C) Grace Hopper
(D) John von Neumann
Ans: Alan Turing
Explanation: Alan Turing made significant contributions to computer science by breaking the German Enigma code during World War II, which helped the Allies decipher encrypted messages.

(v) What term was coined to describe an actual moth causing a malfunction in a computer, which was recorded in the logbook?
(A) Computer Virus
(B) Computer Glitch
(C) Computer Bug
(D) Computer Error
Ans: Computer Bug
Explanation: Grace Hopper coined the term "computer bug" when an actual moth caused a malfunction in the Mark II computer in 1947. She taped the moth in the computer's logbook, thus recording the first actual instance of a computer bug.

True or False 

(i) Charles Babbage is known as the "Father of Computing" due to his invention of the abacus. 
(ii) The first generation of computers used vacuum tubes for circuitry. 
(iii) Alan Turing's work during World War II included breaking the German Enigma code.
(iv) The microprocessor had little impact on the development of personal computers.
(v) The term "computer bug" was coined by Thomas Edison during the development of the first light bulb.
Ans: (i) False
(ii) True
(iii) True
(iv) False
(v) False 

Fill in the Blanks 

(i) A computer follows a special set of rules, called ______________, to understand what we want it to do.
(ii) The part of the computer that acts like its brain, telling it what to do, is called the ______________.
(iii) We use a flat device with buttons to type letters and numbers into the computer. It's called a ______________.
(iv) Imagine the world as a giant web connecting people and places. The internet is like this web, connecting ______________ all over the globe.
(v) A website is like a virtual book on the internet with many pages full of information. We can access these "books" using a ______________.

Ans: (i) instructions
(ii) CPU
(iii) keyboard
(iv) computers
(v) web browser

Very Short Answer Type Questions

Q1: What two things does a computer understand?
Ans: Computers understand on and off, similar to yes and no.

Q2: What shows pictures and videos on your computer?
Ans: The monitor is the screen that displays pictures and videos.

Q3: What do you use to type words and numbers on a computer?
Ans: You use the keyboard to type words and numbers on a computer.

Q4: What connects your computer to the internet?
Ans: A cable or Wi-Fi connection connects your computer to the internet.

Q5: What stores information and programs on your computer?
Ans: The hard drive stores information and programs on your computer.

Short Answer Type Questions

Q1: Imagine you have a recipe book with instructions for different dishes. How is this similar to a computer program?
Ans: Both a recipe book and a computer program provide step-by-step instructions that need to be followed in a specific order to achieve a desired outcome – a delicious dish or a completed task on the computer.

Q2: Why do you think people say "the computer crashed"? What does it actually mean?
Ans: People say "the computer crashed" when it unexpectedly stops working or malfunctions. It doesn't literally crash like a car, but it means the computer program encountered an error and can't continue functioning properly.

Q3: You want to play a game with your friend online, but their computer is too slow. What might slow down a computer, and how can we speed it up?
Ans: Several things can slow down a computer, like having too many programs open at once, inadequate storage space, or outdated software. To speed it up, you can close unnecessary programs, delete unused files, or update software.

Q4: What's the difference between the internet and a website? It might help to think of the internet like a library.
Ans: Imagine the internet like a massive library with countless books (websites) on various topics. The internet is the vast network connecting computers worldwide, while websites are individual pages within that network, each containing specific information or providing different services.

Q5: Why do you think computers need to be kept cool? What happens if they get too hot?
Ans: Computers generate heat while processing information. If they overheat, it can damage the internal components and cause malfunctions. Therefore, it's important to keep them cool with fans or proper ventilation.