All questions
- what are features of Windows NT operating system ? The features of Windows NT are as follows :- (1) It is multitasking, multi-user and multithreading operating system. (2) It also includes vi... 2
- What is operating system ? Explain major services of OS An operating system is a program , which acts as an interface between user of a computer and computer hardware . It provides an environment... 1
- Name the software required to make a computer functional. Write down its two primary services. The software that is necessary for the computer to function is called System Software. This controls the internal computer operations. This... 2
- Apollonius Theorem (with proof) Statement- “the sum of squares of any of the two sides of a triangle equals to twice its square on half of the third side, along with the tw... 2
- Pythagoras theorem with formula and proof https://youtu.be/jaLb-QCtIVY Pythagoras theorem In a right-angled triangle, the square of the hypotenuse side is equal to the sum of squares... 1
- In the adjoining figure, ∠QPR = 90°, seg PM ⊥ seg QR and Q – M – R, PM = 10, QM = 8, find QR. In ∆PQR, ∠QPR = 90° and [Given] seg PM ⊥ seg QR ∴ PM² = OM × MR [by Theorem of geometric mean] ∴ 10² = 8 × MR ∴ MR = 100over8 = 12.5 Now, QR... 1
- In ∆PQR, point S is the midpoint of side QR. If PQ = 11, PR = 17, PS = 13, find QR. In ∆PQR, point S is the midpoint of side QR. [Given] ∴ seg PS is the median. ∴ PQ² + PR² = 2 PS² + 2 SR² [Apollonius theorem] ∴ 11² + 17² =... 1
- Identify, with reason, which of the following are Pythagorean triplets. i. (3,5,4) Here, 5² = 25 3² + 4² = 9 + 16 = 25 ∴ 5² = 3² + 4² The square of the largest number is equal to the sum of the squares of the oth... 1
- In the given figure, if LK = 6√3 find MK, ML, KN, MN and the perimeter of MNKL Solution:: In triangle space LKM , tan30^∘ =MLover LK ⇒ ML=6√( 3 ) × 1 / √( 3 ) =6 cos 30 ^(°) = LK / MK ⇒ MK=dfrac LK cos 30 ^(°) = 6√( 3 )... 1
- Walls of two buildings on either side of a street are parallel to each other. A ladder 5.8 m long is placed Solution:: Correct answer is 8.2 m Video solution https://youtu.be/WmtS_3V0VKQ 1
- A ladder 25m long just reaches the top of a building 24m Given: length of ladder= 25 m building height=24 m By pythagoras theorem , x²=25² -24² =625-576 x²=49 x= 7 Hence the answer is 7 m https://y... 1
- Find the diagonal of a rectangle whose lengths of sides is 8cm and 15cm. The length of diagonal is 17 cm 1
- A boat travels 16 km upstream and 24 km downstream in 6 hours. speed of the boat in still water is 8 km/hr. and speed of water current is 4 km/hr. 1
- Terminate a process is the system call available in ---- management The correct answer is option is a) process 2
- The time required for read write head to move to correct track is The correct option is c) seek time 2
- _____ terminal does no processing on input characters. The correct answer is option B) Dumb terminal 2
- Decide whether the following sequence is an A.P. , if so find the 20th term of the progression -12,-5,2,9,16 Correct answer is 121 2
- Places A and B are 30 km apart and they are on a straight road. Hamid travels from A to B on bike. At Speed of Hamid is 50km/hr and of Joseph is 40km/hr 1
- Two numbers differ by 3. The sum of twice the smaller number and thrice the greater number is 19. Find the numbers. hence, the two numbers are 5 and 2 Video solution https://youtu.be/1qCuzBxRJ40 1
- (1) Complete the following activity to solve the simultaneous equations. Solution: 3, -2 1
- P. Perform each of the following calculations. Round off your answers to two digits Refer below image for detailed solution 2
- Q. Perform each of the following calculations. Round off your answers to three digits. Solution:: 5.02×10¹⁰ , 2
- R. Perform the following operations : a. 3.971 × 107 + 1.98 × 104 ; b. 1.05 × 10-4 - 9.7 × 10-5; c. 4.11 × 10-3 + 8.1×10-4; d. 2.12 × 106 - 3.5 × 105 A) 3.971 × 10⁷ + 1.98 × 10⁴ = 3.971 × 10⁷ + 0.00198 × 10⁷ = (3.971 + 0.00198) × 10⁷ = 3.97298 × 10⁷ B) 1.05 × 10⁻⁴ − 9.7 × 10⁻⁵ = 10.5 × 10⁻... 2
- A 1.000 mL sample of acetone, a common solvent used as a paint remover, was placed in a small bottle whose mass was known to be 38.0015 g. Precision: Measurement Mass of acetone observed (g) 1 38.7798-38.0015=0.7783 2 38.7795-38.0015=0.7780 3 38.7801-38.0015=0.7786 Mean= 0.7783... 2