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CBSE Class 11 Pre Board 2020 : Computer Science (Delhi Public School (DPS), Jammu)

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DELHI PUBLIC SCHOOL, JAMMU ASSIGNMENT FOR FINAL EXAMINATION (2020) SUBJECT: COMPUTER SCIENCE(083) CLASS: XI Q.1 What is the need for secure passwords? Q.2 What is the significance of Firewall in a computer s security scheme? Q.3 What is Authentication and Authorization? Why are these two used together? Q.4 How is pharming similar to and different from phishing? Q.5 What are denial-of-service or Sweeper attack? Q.6 What measures would you take to avoid (a)Virus attack (b) Spyware (c) Adware (d) Spam Q.7 What do you understand by PC intrusion? Q.8 What is a spam? Why has it become a big Internet issue? Q.9 (e) PC Intrusion What are malware? What type damages can they cause to your computer? Q.10 What type damages can be caused by viruses to your computer? Q.11 Why are privacy settings of a social networking site so important? Q.12 What is digital footprint? Why is it so important? Q.13 What is cyber bullying and cyber stalking? Q.14 What is cyber-crime? How can you report it? Q.15 What are cookies? How are they used by websites to track you? Q.16 What should you do to protect your identity on Internet? Q.17 What are the main categories of NoSQL databases? Q.18 How is a cross join different from natural join? Give example. Q.19 What is database index? Is it a table? Q.20 Differentiate between (i) DROP TABLE, DROP DATABASE (ii) DROP TABLE, DROP clause of ALTER TABLE. Q.21 How is Foreign Key commands related to Primary Key? Q.22 Differentiate between DDL and DML commands. Q.23 What is SQL? What are different categories of commands available in SQL? Q.24 How is private cloud different from public cloud? Q.25 What is parallel computing? Q.26 What is the role of memory manager and I/O manager of OS? Q.27 What is process scheduling? Q.28 Make AND Gate using NAND Gate. Q.29 Prove algebraically that (X+Y).(X+Z)=X+Y.Z Q.30 State DeMorgan s law of Boolean Algebra and verify them using truth table. Q.31 What is a truth table? What is its significance? Q.32 Compare UTF-8 and UTF-32 encoding schemes. Which one is most popular scheme? Q.33 Add the binary numbers (a) 110101 and 101111 Q.34 Covert (a)1010 (b) 10110 and 1101 the following binary numbers to decimal (b) 111000 (c) 10101111 (d) 10110 Q.35 What is the utility of these software? (a) disk fragmentor (b) backup software Q.36 What are tokens in Python? How many types of tokens allowed in Python? Q.37 What is block/code block/suit in Python? Q.38 How many types of strings are supported by Python? Q.39 How can you create multi-line strings in Python? Q.40 WAP to read todays date (only date Part) from user. Then display how many days are left in the current month.

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