Page 32 - Computer Science V2.0 Class 11

4. Give any two advantages of secondary memory.
Ans. Provides permanent storage
Is non-volatile
5. List the functions of an operating system.
Ans. Memory management
Process management
Device Management
File Management

6. Do the following conversions:
(i) 1 GB=____________bytes
(ii) 1 EB=____________TB
(iii) 1024TB= _____________PB
(iv) 1 PB= ______________KB
Ans. (i) 1024*1024*1024
(ii) 1024 * 1024
(iii) 1
(iv) 1024*1024*1024*1024

Case-based Questions

1. Asha comes from a remote village in Bihar. Since she had little access to computers or any other digital gadgets, her
knowledge of hardware and software is limited. Her teacher has given her the following list of items that have to be
categorized into input, output, and memory devices. Help her complete the task.
Mouse
Plotter
Compact disc
Light pen
Projector
External hard disk
Ans. Mouse Input device
Plotter Output device
Compact disc Memory device
Light pen Input Device
Projector Output Device
External hard disk Memory Device

2. Ramadan wants to create his resume on a word processor but does not want to buy any software. What is the alternative
that he can use free of cost?
Ans. Ramadan may use open-source software such as Google Docs or Open Office.
3. Partho Das is learning to program in Python. He notices that each line of the program is executed in a sequence. If an error
is encountered, all the statements before that point are executed and produce the output, however, he must rectify the
error before the execution continues. He was surprised to see this since, while he was writing C++ programs, all the errors
with line numbers were displayed on the screen, and the program could only display the result once all the errors were
fixed. Why do the two programming languages behave so differently? Please explain this to Partho Das.
Ans. This is because Python is an interpreter-based language, while C++ is a compiler-based language. In an interpreter-based
language, the interpreter executes the statements as they are encountered.

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