Computer Science
Class-VII
Chapter-1 Computer Language
A.Tick the correct answer:
1. Today, much purchased software, shareware and freeware is downloaded from the _____.
a. internet b. computer c. hardware d. system
Answer: Internet
2. Digital computer represents all kinds of information and data in the ___ system.
a. octal b. binary c. decimal d. hexadecimal
Answer: Binary
3. _____ number system consists of two digits i.e., 0 and 1.
a. decimal b. octal c. binary d. dexadecimal
Answer: Binary
4. The base of decimal number system is _____.
a. 16 b. 15 c. A to F d. 10
Answer: 10
5. Octal number system uses fewer ______ than conventional number system.
a. symbols b. decimals c. instructions d. devices
Answer: Symbols
6. _____ number system consists of 16 digits.
a. decimal b. hexadecimal c. octal d. binary
Answer: Hexadecimal
7. The alphabets ________ represent decimal numbers from 10 to 15.
a. A to D b. A to G c. A to F d. A to E
Answer: A to F
B. Fill in the blanks:
1. Computer system consists of hardware and software_____.
Answer: Component
2. ________ refers to objects that we can actually touch.
Answer: Hardware
3. ______ refers to the computer instructions or data.
Answer: Software
4. Anything that can be stored_________ is software.
Answer: Electronically
5. Software can be purchased or ______________.
Answer: Download
6. Software is often packaged on CD-ROMs and ______.
Answer: Disk
7. Computers can understand only___________.
Answer: Machine language
C. Write true or false:
1. We can feel and touch the software.
Answer: False
2. Hardware is not an essential part of computer systems.
Answer: False
3. Software and hardware are different to each other.
Answer: True
4. Motherboard is an internal hardware.
Answer: True
5. Keyboard is an external hardware.
Answer: True
6. Graphics software is used by a graphic designer.
Answer: True
D. Answer the following questions:
1. What is a computer system?
Answer: A computer system consists of hardware and software components, they work together to operate the programs.
2. What is hardware? Name any two internal hardware and external hardware.
Answer: All physical parts of computer are called hardware.
Internal hardware: RAM and Motherboard
External hardware: Keyboard and Mouse.
3. What is software? Explain in brief.
Answer: Set of programs is called software.
Software refers to the computer instructions or data. Software is stored on CD, DVD etc.
Example: MS Office, CAD/CAM software, Game software, Antivirus etc.
4. What are some general kinds of application that software includes?
Answer: Some general kinds of application that software includes:
* Productivity software- MS Word, MS Excel, MS PowerPoint
* Presentation software
* CAD/CAM software
* Graphics software
* Software for banking, insurance etc.
5. What is Binary number system?
Answer: Binary number system consists of two digits i.e., 0 and 1. Its base is 2. Digital computer represents all kinds of information and data in the binary system.
6. What is decimal number system?
Answer: The decimal number system consists of ten digits i.e. 0 to 9. Its base is 10. It is probably the most commonly used number system.
No comments:
Post a Comment