Students must start practicing the questions from CBSE Sample Papers for Class 9 Computer Applications with Solutions Set 3 are designed as per the revised syllabus.
CBSE Sample Papers for Class 9 Computer Applications Set 3 with Solutions
Time Allowed : 2 hours
Maximum Marks : 50
General Instructions:
- This Question Paper has 5 Sections A-E.
- All Questions are compulsory. However; internal choices have been provided in some of the questions.
- Section A has 12 questions carrying 01 mark each.
- Section B has 7 Short Answer (SA-I) type questions carrying 02 marks each.
- Section C has 4 Short Answer (SA-II) type questions carrying 03 marks each.
- Section D has 1 Long Answer (LA) type question carrying 04 marks.
- Section E has 2 Source based /Case-based /Passage based Questions carrying 04 marks each.
Sectiom-A (1 Mark each)
(All questions are compulsory)
Question 1.
The physical component of computers are called- [1]
(A) Software
(B) Hardware
(C) Firmware
(D) Live ware
Answer:
(B) Hardware
Explanation:
Hardware represents the physical and tangible components of a computer, i.e. the components that can be seen and touched.
Question 2.
Which one is a device that is the “brain”of a computer system? [1]
(A) CPU
(B) CD-ROM
(C) Mouse
(D) Scanner
Answer:
(A) CPU
Explanation:
A CPU is essentially a hardware that performs functions related to input and output, processing and storage of data for a computer sys-tem.
Question 3.
Which software takes control of computer system on startup? [1]
(A) Compiler
(B) Operating System
(C) Application Software
(D) All of these
Answer:
(B) Operating System
Explanation:
An operating system manage the computer’s resources, such as the central process-ing unit, memory, disk drives, and printers and establish a user interface, also execute and provide services for applications software.
Question 4.
Internet may be termed as an example of [1]
(A) Local Area Network
(B) Metropolitan Area Network
(C) Wide Area Network
(D) All of these
Answer:
(C) Wide Area Network
Explanation:
The world’s largest WAN is the inter-net because it is a collection of many international networks that connect to each other.
Question 5.
What software can you use to avoid getting viruses? [1]
(A) Disk cleanup software
(B) Firewall
(C) Antivirus software
(D) Safety software
Answer:
(C) Antivirus software
Explanation:
Antivirus software, also known as anti-malware, is a computer program used to prevent, detect, and remove malware. Antivirus software was originally developed to detect and remove computer viruses, hence the name.
Question 6.
What is the most common way people’s computers get infected by a virus? [1]
(A) Receive a Fax
(B) Install new hardware
(C) Download E-mail attachment
(D) Run/Open an infected disk
Answer:
(C) Download E-mail attachment
Explanation:
One of the most common ways a computer becomes infected is when a user accepts what they see on the screen without reading or understanding the prompt or you downloaded or installed infected files.
Question 7.
Which of the following is not an example of cybercrime? [1]
(A) Stealing computer hardware
(B) Cyber bullying
(C) Cyber stalking
(D) Stealing someone’s online identity
Answer:
(A) Stealing computer hardware
Explanation:
Most Common Cyber Crimes
- Phishing and Scam
- Identity Theft
- Ransom-ware Attack
- Hacking/Misusing Computer Networks
- Internet Fraud.
Question 8.
The shortcut key used for copying selected text into clipboard is- [1]
(A) CTRL+X
(B) CTRL+V
(C) CTRL+C
(D) CTRL+D
Answer:
(C) CTRL+C
Explanation:
CTRL+X is used to cut the selected text.
CTRL+V is used to Paste the copied text.
CTRL+D is used to open the font preferences window.
Question 9.
Which of the following gives the status of your document like- page number, number of pages, number of word etc.? [1]
(A) Status bar
(B) Standard tool bar
(C) Formatting tool bar
(D) None of these
Answer:
(A) Status bar
Explanation:
The status bar is the area at the bot-tom of the Word window. It indicates information about the current document.
Question 10.
What is Cyber Security? [1]
(A) Cyber Security provides security against malware.
(B) Cyber Security provides security against cyber-terrorists.
(C) Cyber Security protects a system from cyber attacks.
(D) All of the mention.
Answer:
(D) All of the mention.
Explanation:
Cyber Security provides security to a system against cyber-attacks by using various technologies, and processes.
Questions No-11 & 12 are Assertion and Reason types. Each question consists of two statements, namely, Assertion (A) and Reason (R). Select the most suitable option considering the Assertion & Reason.
Question 11.
Assertion (A): In MS-Excel spreadsheet is made up of rows and columns. [1]
Reason (R): Table is a grid organized in columns and rows.
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
(B) Both Assertion (A) and Reason (R) are true and Reason (R) is not a correct explanation of Assertion (A).
(C) Assertion (A) is True and Reason (R) is False.
(D) Assertion (A) is False and Reason (R) is True.
Answer:
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
Question 12.
Assertion (A): A student wanted to type the sentence “Two Animal has been there” instead it was typed as
“To Animals have been their”. MS-word helps to check error of this sentence. [1]
Reason (R): The Spell check feature MS-word helps to find error and suggest correcting them.
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
(B) Both Assertion (A) and Reason (R) are true and Reason (R) is not a correct explanation of Assertion (A).
(C) Assertion (A) is True and Reason (R) is False.
(D) Assertion (A) is False and Reason (R) is True.
Answer:
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
Section-B (2 Marks each)
Question 13.
What do you understand by Computer Program? [2]
Answer:
Computer Program: Computer program is a set of instruction given to a computer to perform a spe-cific task.
Example: Program of Arithmetic Addition.
Question 14.
What are the major strengths and weaknesses of computer system? [2]
OR
What are the basic units of computer system?
Answer:
Strengths of Computer:
- High Speed
- Accuracy
- Versatile
- Large Memory
- Diligence
Weaknesses of Computer:
- No IQ
- No Emotions
- No Decision Making Power
- No Feelings
- Not able to learn from experience
OR
Basic units of Computer System are:
- Input Unit
- Output Unit
- Storage Unit
- Central Processing Unit
Question 15.
What is DataBase Management System? [2]
Answer:
Database Management System: Database Man-agement System is application software, used to create Database, and perform operations like in-sert, delete, update, create records in Database.
Ex- MS Access, SQL etc.
Question 16.
Describe about Computer Virus. [2]
OR
Briefly discuss about Private Browsing.
Answer:
Computer Virus: Virus is a Malicious software program designed to harm computer systems or the files stored on it.
Examples:
Macro Virus, Boot sector Virus.
OR
Private Browsing: Private Browsing hides the browsing history of the user from another user who is accessing the same machine. Private browsing mode is a feature that hides your internet activity from anyone who uses your device.
Question 17.
What do you mean by the term Word Wrapping? [2]
Answer:
Word Wrap: Word Wrap is a feature of word pro-cessors that automatically change a new line, when a line is completely filled.
Question 18.
What do you understand by the term Clipboard? [2]
OR
Describe about Drop Cap.
Answer:
Clipboard: A clipboard is a temporary storage area for data that the user wants to cut and copy from one place to another. Clipboard is a temporary memory that stores copied text and objects.
OR
Drop Cap: MS Word provides a special feature known as a drop cap. A drop cap is a large capital letter that presents at the beginning of a text block or a paragraph and has the depth of two or more lines of regular text.
Question 19.
What is the basic use of Webcam? [2]
Answer:
The Web camera basically works by capturing a series of digital images that are transferred by the computer to a server and then played to the host-ing page.
Section-C (3 Marks each)
Question 20.
How can you use or browse the internet safely? [3]
Answer:
Internet is the network of networks. Now-a-days it is the basic need of maximum people. There are some steps which can be followed while using In-ternet for the safety purpose.
- We can install and use most secure internet browser like (Google Chrome, Mozilla Fire- fox).
- We can customise our security settings like (shutting off features like “auto fill”, turning off “cookies”, block pop-up windows), so that nobody can access our data.
- We can create typical password which can-not be recognized by others.
Question 21.
What is application software? Why it is required? [3]
Answer:
Application Software: Application software, also called application program, software designed to handle specific tasks for users. Such software directs the computer to execute commands given by the user.
Example: MS Office, Adobe Reader, VLC, Games etc.
Question 22.
What do you understand by Slide Show? [3]
OR
What are the basic components of a slide?
Answer:
Slide Show: A slide show is a presentation of a se-ries of still images (slides) on a projection screen or electronic display device, typically in a prear-ranged sequence.
OR
Basic Components of Slide:
- Title: Refers to the heading of the slide.
- Subtitle: Refers to the description of the slide data.
- Drawing objects: Refer to the various built- in shapes.
- Clipart or pictures: Refer to the graphical objects that help in enhancing the appearance of a slide.
Question 23.
What are the disadvantages of computer virus? [3]
Answer:
Disadvantages of computer virus:
- Virus can steal the valuable data of your computer.
- Virus can crush window.
- Virus can disable some of your operating system settings.
Section-D (4 Marks each)
Question 24.
What are the different types of networks? [4]
OR
Describe types of hardware used for output. Name two most common output devices.
Answer:
Types of network: There are three types of net-work based on their coverage area.
Local Area Network: A local area network (LAN) is a collection of devices connected together in one physical location, such as a building, office, or home.
Metropolitan Area Network: A metropolitan area network (MAN) is a computer network that is larger than a single building local area network (LAN) but is located in a single geographic area that is smaller than a wide area network (WAN).
Wide Area Network: A wide-area network (WAN) is the technology that connects your offices, data centers, cloud applications, and cloud storage together.
OR
Types of hardware used for output: Those hard-ware devices used for produce result called output devices.
Output Devices:
- Monitor
- Printer
- Speaker
- Plotter
Section-E (4 Marks Each)
Question 25.
Case Study-1 [4]
Asmita wanted to gift his friend a digital clock. So she searched for many sport items and digital clock online. But after that every time he goes online, his web browser shows him advertisement about sports items and digital watches.
(a) Why is this happening?
(b) How could Asmita avoid them?
(c) How can Asmita get rid of this now?
(d) What are the other ways to avoid them?
Answer:
a. This is happening because third party cookies saved his search preferences and now website are posting advertisements based on his preferences.
b. Asmita could have avoided this by privately browsing i.e., opening the web browser in incognito mode before searching for such things.
c. Now Asmita can delete all the previous his-tory and cookies stored on his computer. This would stop websites posting advertise-ments.
d.
- Delete Cache and Cookies
- Use Incognito Mode
- Stop backtracking
Question 26.
Case Study-2 [4]
A local restaurant’s spreadsheet used to model profits is shown below. To calculate the column headed hours, the restaurant has divided the total number of one-off items made into the total time it looks the chef to make the batch of items. The ingredients costs have been calculated by dividing total purchase price of the ingredients by the number of food items that can be produced from the ingredients bought. The restaurant uses two chefs. The pastry chef is paid at a higher rate than the general chef.
(a) Write down the formula that would be entered in cell F4 to calculate the total cost of the vegetable soup.
(b) State how you would set up a formula in the other cells under column F.
(c) What formula would the restaurant use to calculate the total cost of the meal?
(d) Which option is use to arrange food items on their basis of taking time in increasing order?
Answer:
a. =(B4*C4) + D4 + E4
b. Using AutoFill function
c. =SUM(F4:F8)
d. Sorting