Science (English Medium) Class 11 - CBSE Question Bank Solutions

Try the following conversion.

(11001010)₂ = (?)₁₀

Try the following conversion.

(1010111)₂ = (?)₁₀

Write a binary representation of the following hexadecimal number.

4026

Write a binary representation of the following hexadecimal number.

BCA1

Write a binary representation of the following hexadecimal number.

98E

Write a binary representation of the following hexadecimal number.

132.45

Presume that a ladder is put upright against a wall. Let variables length and angle store the length of the ladder and the angle that it forms with the ground as it leans against the wall. Write a Python program to compute the height reached by the ladder on the wall for the following values of length and angle:

1. 16 feet and 75 degrees
2. 20 feet and 0 degrees
3. 24 feet and 45 degrees
4. 24 feet and 80 degrees

Schools use the “Student Management Information System” (SMIS) to manage student-related data. This system provides facilities for:

• recording and maintaining the personal details of students.
• maintaining marks scored in assessments and computing results of students.
• keeping track of student attendance.
• managing many other student-related data. Let us automate this process step by step.

Identify the personal details of students from your school identity card and write a program to accept these details for all students of your school and display them in the following format.

Give the output of the following when num1 = 4, num2 = 3, num3 = 2.

num1 = 24 // 4 // 2
print(num1)

Write a program to input your friends’ names and Phone Numbers and store them in the dictionary as the key-value pair. Perform the following operations on the dictionary:

1. Display the name and phone number of all your friends
2. Add a new key-value pair in this dictionary and display the modified dictionary
3. Delete a particular friend from the dictionary
4. Modify the phone number of an existing friend
5. Check if a friend is present in the dictionary or not
6. Display the dictionary in sorted order of names

Identify the category (system, application, programming tool) of the following software:

Ubuntu

Ask your teacher to help you locate any two device drivers installed on your computer.

Write any two system software and two application software installed on your computer.

Express the following octal number into their equivalent decimal number.

145

Express the following octal number into their equivalent decimal number.

6760

Express the following octal number into their equivalent decimal number.

455

Express the following octal number into their equivalent decimal number.

10.75

Convert the following binary number into an octal and hexadecimal number.

1110001000

Convert the following binary number into an octal and hexadecimal number.

110110101

Convert the following binary number into an octal and hexadecimal number.

1010100