Science (English Medium) Class 12 - CBSE Important Questions

The modem at the sender’s computer end acts as a ______.

______ is a communication methodology designed to deliver both voice and multimedia communications over Internet protocol.

Write the full form of the following:

SMTP

Write the full form of the following:

PPP

What is the use of TELNET?

What is the need for Protocols?

In case of ______ switching, before a communication starts, a dedicated path is identified between the sender and the receiver.

Define the term bandwidth with respect to networks.

Janish Khanna used a pen drive to copy files from his friend's laptop to his office computer. Soon his computer started abnormal functioning. Sometimes it would restart by itself and sometimes it would stop different applications running on it. Which of the following options out ·of (i) to (iv), would have caused the malfunctioning of the computer? Justify the reason for your chosen option:

1) Computer Virus

2)Spain Mail

3) Computer Bacteria

4) Trojan Horse

What is Trojan Horse?

MakeInIndia Corporation, a Uttarakhand-based IT training company, is planning to set up training centres in various cities in the next 2 years. Their first campus is coming up in the Kashipur district. At the Kashipur campus, they are planning to have 3 different blocks for App development, Web designing, and Movie editing. Each block has a number of computers, which are required to be connected to a network for communication, data, and resource sharing. As a network consultant of this company, you have to suggest the best network-related solutions for the issues/problems raised in questions keeping in mind the distances between various blocks/locations and other given parameters.

Distance between various blocks/locations:

Number of computers

1. Suggest the most appropriate block/location to house the SERVER in the Kashipur campus (out of the 3 blocks) to get the best and most effective connectivity. Justify your answer.
2. Suggest a device/software be installed in the Kashipur Campus to take care of data security.
3. Suggest the best-wired medium and draw the cable layout (Block to Block) to economically connect various blocks within the Kashipur Campus.
4. Suggest the placement of the following devices with appropriate reasons:
   a. Switch/Hub
   b. Repeater
5. Suggest a protocol that shall be needed to provide a Video Conferencing solution between Kashipur Campus and Mussoorie Campus.

How is http different from https?

The Last Lesson shows that people suddenly realised how precious their language was to them.
Comment.

“You realise the true value of a thing only on losing it.” Comment on this statement in the light of the story, The Last Lesson.

Read the given extract and answer the questions.

1. List any two sensory details present in this extract.     (1)
2. Why does the protagonist feel anxious about entering the classroom on this particular day?      (1)
   1. The classmates have started the lesson
   2. The teacher is in a bad mood
   3. The classroom is too quiet
   4. The protagonist is running late
3. Complete the sentence appropriately.      (1)
   The phrase "as quiet as Sunday morning" suggests that ______.
4. Pick evidence from the extract that helps one infer that this was not the protagonist’s first time being late to school.       (1)
5. What does the term 'terrible iron ruler' indicate about M. Hamel?      (1)
6. Which of the following headlines best suggests the central idea of the extract?     (1)
   1. The Fears of a Latecomer
   2. The Importance of Punctuality
   3. The Rigidity of the School System
   4. The Anxiety of a Young Student

What change did Saheb feel working at the tea shop ?

What do we come to know about the author of Lost Spring, Anees Jung, through her interactions with Saheb and Mukesh?

Read the given extract and answer the questions.

1. What is the writer’s purpose in allowing the boys to speak for themselves via dialogue, as opposed to only a writer’s commentary?    1
2. The line, "It is not lack of money but a tradition to stay barefoot" can be best classified as:    1
   1. A fact
   2. An opinion
   3. A theme
   4. A plot point
3. Explain any one possible inference that can be drawn from the line, "an army of barefoot boys who appear like the morning birds and disappear at noon”.     1
4. Identify the line from the text that bears evidence to the fact that the writer's association with the boys is not a recent one.    1
5. Based on the context provided in the extract, select the most likely comment that the writer would have made, based on the boy's reaction to the mismatched shoes.      1
   1. "Why are your shoes mismatched? That's not a good look."
   2. "Don't worry about your shoes, you can wear a matching pair later."
   3. "I like your shoes. What matters is that they protect your feet."
   4. "Have you chosen to mismatch your shoes?"
6. Complete the sentence with ONE word.      1
   The phrase "he answers simply", suggests that the boy's response to the writer's question about why he wasn't wearing chappals was ______.

How did the peddler feel after robbing the crofter? What course did he adopt and how did he react to the new situation? What does his reaction reveal?

When and how did the peddler realise that he had fallen into a rattrap ? How could he get out of it ?