Haryana Police Exam (07.08.2021) Shift I

Total Questions: 100

31. How many electrons taken together make one coulomb?

Correct Answer: (1) 6.25 × 10¹⁸electrons
Solution:The coulomb is the SI unit for electric charge.
  • 6.25 x 10-18 electrons are required to make one coulomb of charge.

32. One ohm is equal to:

Correct Answer: (1) 1 volt/1 ampere
Solution:1 ohm is equal to one volt (V)/ one ampere (IA).
  • 1 Ohm is defined as the resistance of a conductor with a potential difference of 1 volt applied to the ends through which 1-ampere current flows.
  • Ohms is the Si unit of electrical resistance.

33. In which from the chemical compound RDX is used?

Correct Answer: (3) As an explosive
Solution:RDX is a white crystalline solid also known as Royal Demolition explosive that is mixed with other explosives, oils, or waxes in making military munitions and other products.
  • It is used in a large number of explosives and demolition blocks.

34. Bio-chemical compounds are used as

Correct Answer: (4) All of the above
Solution:A biochemical compound is any carbon based compound that is found in living things. Biochemical compounds make up the cells and tissues of living things.
  • They are also involved in all life processes, including making and using food for energy.

35. Which of the following indicator used in determination of hardness?

Correct Answer: (1) EBT
Solution:Eriochrome Black T is a complexometric indicator that is used in complexometric titrations, which is mainly used to determine total hardness of Water.
  • Total hardness is due to the presence of bicarbonates. chlorides and sulphates of calcium and magnesium ions.

36. Who made the first electronic computer ENIAC?

Correct Answer: (3) Jay Presper Eckert
Solution:Originally announced on Vita February 14, 1946, the Electronic Numerical Integrator and Computer (ENIAC), was the first general-purpose electronic computer.
  • John Mauchly and J. Presper Eckert built the machine at the University of Pennsylvania.

37. Which of the following is the largest unit of storage?

Correct Answer: (4) TB
Solution:
  • Kilobyte (KB): 1024 bytes
  • Megabyte (MB): 1024 kilobytes
  • Gigabyte (GB): 1024 megabytes
  • Terabyte (TB): 1024 gigabytes

38. The program which is permanently stored in the ROM in the form of hardware is known as ?

Correct Answer: (3) Firmware
Solution:Firmware is a software program or set of instructions programmed on a hardware device. It provides the necessary Instructions for how the device communicates with the other computer hardware.
  • Firmware is typically stored in the flash ROM of a hardware device. While ROM is "readonly memory," flash ROM can be erased and rewritten because it is actually a type of flash memory.

39. ________is the process of dividing a disk into tracks and sectors.

Correct Answer: (2) Formatting
Solution:The process of dividing the disk into tracks and sectors is called as formatting.
  • Formatting is a process of configuring data storage device such as hard disk drive, sol-id-state drive, floppy disk, or USB flash drive for initial use.
  • Actually, the whole disk formatting process consists of three parts: low level formatting, partitioning, and high level formatting.

40. What is the permanent memory built into your computer called?

Correct Answer: (4) ROM
Solution:The permanent memory of a computer is known as ROM(Read only memory).
  • It is a non-volatile memory that stores information permanently, even when the power is turned off.